U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Report 2012–5198

Overview of Groundwater Quality in the Piceance Basin, 

Western Colorado, 1946–2009
COVER. Drill rig at base of Roan Cliffs near Rifle, Colorado (photo taken by Judith Thomas, 

U.S. Geological Survey).
Overview of Groundwater Quality in the 

Piceance Basin, Western Colorado, 

1946–2009

By J.C. Thomas and P.B. McMahon

Prepared in cooperation with (in alphabetical order): Antero Resources, Bureau 

of Land Management, Bureau of Reclamation, Chevron Corporation, Cities of 

Grand Junction and Rifle, Colo., Colorado Department of Agriculture, Colorado 

Department of Natural Resources, Colorado Department of Public Health and 

Environment, Colorado Division of Wildlife—River Watch, Colorado Oil and 

Gas Conservation Commission, Colorado River Water Conservation District, 

Delta County, Colo., EnCana Oil & Gas (USA) Inc., Garfield County, Colo., Gunnison Energy Corp., National Park Service, Natural Soda, Inc., North Fork River 

Improvement Association, Oxy Petroleum Corporation, Petroleum Development 

Corp., Rio Blanco County, Shell Oil Company, Solvay Chemicals, Towns of Carbondale, De Beque, Palisade, Parachute, Rangely, and Silt, Colo., U.S. Forest 

Service, West Divide Water Conservancy District, and Williams Companies, Inc. 

Scientific Investigations Report 2012–5198

U.S. Department of the Interior 

U.S. Geological Survey
U.S. Department of the Interior

KEN SALAZAR, Secretary

U.S. Geological Survey

Suzette M. Kimball, Acting Director

U.S. Geological Survey, Reston, Virginia: 2013

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Suggested citation:

Thomas, J.C., and McMahon, P.B., 2013, Overview of groundwater quality in the Piceance Basin, western Colorado, 

1946–2009: U.S. Geological Survey Scientific Investigations Report 2012–5198, 204 p.
iii

Contents

Abstract...........................................................................................................................................................1

Introduction.....................................................................................................................................................2

Purpose and Scope ..............................................................................................................................2

Description of the Study Area ............................................................................................................2

Geology..........................................................................................................................................2

Hydrology ......................................................................................................................................8

Land Cover and Land Use...........................................................................................................8

Previous Work .....................................................................................................................................10

Methods.........................................................................................................................................................11

Compilation of Data ............................................................................................................................11

Types of Analysis Used......................................................................................................................11

Overview of Groundwater Quality in the Piceance Basin ....................................................................13

Sources of Recharge to Wells..........................................................................................................13

Dissolved Oxygen................................................................................................................................17

Major Ions............................................................................................................................................17

Trace Elements....................................................................................................................................29

Nitrate...................................................................................................................................................36

Benzene, Toluene, Ethylbenzene, Xylene .......................................................................................40

Methane ...............................................................................................................................................40

Limitations of the Common Data Repository for Assessing Groundwater Quality and 

Opportunities for Future Monitoring ..................................................................................45

Summary........................................................................................................................................................48

Acknowledgments.......................................................................................................................................50

References Cited..........................................................................................................................................50

Appendix 1. Water Quality Data Used in This Report ............................................................................54

Figures

1. Map showing Piceance Basin study area, western Colorado..............................................3

2. Map showing generalized geologic structures, Piceance Basin, western Colorado.......4

3. Map showing generalized geologic units in which water wells were completed, 

Piceance Basin, western Colorado ...........................................................................................5

4. Map showing distribution of sites by geologic unit for wells in the Piceance Basin, 

western Colorado .........................................................................................................................7

5. Map showing land cover and land use, Piceance Basin, western Colorado.....................9

6. Diagram of stable isotopic composition of water from water wells compared with 

stable isotopic composition of snow from Grand Mesa, Colo., and produced waters 

from the Mesaverde Group, Piceance Basin, western Colorado.......................................16

7. Map showing concentrations of dissolved oxygen in groundwater from wells in the 

Piceance Basin, western Colorado .........................................................................................20

8. Map showing concentrations of dissolved solids in groundwater from wells in the 

Piceance Basin, western Colorado .........................................................................................24
iv

9. Trilinear diagram of major-ion chemistry of groundwater by dissolved solids and 

geologic unit of aquifer well in which is screened, Piceance Basin, western 

 Colorado .......................................................................................................................................25

10. Trilinear diagram of major-ion chemistry of produced waters from Mesaverd

Group and Wasatch Formation, Piceance Basin, western Colorado................................26

11. Map showing values of pH in groundwater from wells in the Piceance Basin, 

western Colorado .......................................................................................................................27

12. Map showing chloride concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................28

13. Map showing sulfate concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................30

14. Map showing fluoride concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................32

15. Map showing arsenic concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................33

16. Map showing barium concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................34

17. Map showing manganese concentrations in groundwater from wells in the 

Piceance Basin, western Colorado .........................................................................................35

18. Map showing iron concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................37

19. Map showing selenium concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................38

20. Map showing nitrate concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................39

21. Map showing benzene concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................41

22. Map showing toluene detections in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................42

23. Map showing methane concentrations in groundwater from wells in the Piceance 

Basin, western Colorado ...........................................................................................................43

24. Diagram of stable hydrogen and carbon isotope compositions of methane swater 

wells in the Piceance Basin, for water samples with at least 1 mg/L of methane..........44

25. Map showing groundwater-quality sites in the Piceance Basin common data 

repository and oil and gas wells permitted by Colorado Oil and Gas Conservation 

Commission and shown on permit layer.................................................................................46

26. Map showing groundwater-quality sites in the Piceance Basin common data 

repository and domestic and municipal wells permitted by Colorado Division of 

Water Resources........................................................................................................................47

Tables

1. Geologic units and U.S. Geological Survey National Water Information System 

descriptions of aquifers represented in the Piceance Basin common data 

repository .......................................................................................................................................6

2. Data sources that contribute to the Piceance Basin common data repository of 

groundwater data, 1946–2009...................................................................................................12

3. Number of sites, samples, and water-quality results in the Piceance Basin 

common data repository and in the dataset analyzed in this report..................................13
v

4. Categories of groundwater-quality data used in the overview analysis by source 

in the Piceance Basin common data repository, 1946–2009 ...............................................14

5. Number and percentage of water-quality samples discussed in this report with 

associated well-depth, depth-to-water, and well-type information..................................15

6. Number of water-quality samples by county, geologic unit, and aquifer, Piceance 

Basin, western Colorado ...........................................................................................................15

7. Summary of analyses of data in the Piceance Basin common data repository for 

constituents discussed in this report......................................................................................18

8. Concentrations of selected water-quality constituents discussed in this report by 

county, geologic unit, and aquifer ...........................................................................................21

9. Concentrations of selected water-quality constituents relative to three dissolvedoxygen concentration thresholds ............................................................................................31
vi

Multiply By To obtain

Length

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

square mile (mi2

) 2.590 square kilometer (km2) 

Flow

cubic foot per second (ft3

/s) 28.32 cubic decimeter per second (dm3/s)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:

°F=(1.8×°C)+32

Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:

°C=(°F–32)/1.8

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 

(NAVD 88).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Elevation, as used in this report, refers to distance above the vertical datum.

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (μS/cm at 

25 °C).

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) 

or micrograms per liter (μg/L).

Abbreviations Used in This Report

< less than

≥ greater than or equal to

μg/L microgram per liter 

ft foot

ft3/s cubic foot per second

mg/L milligram per liter 

mi2 square mile

BTEX benzene, toluene, ethylbenzene, xylene

DO dissolved oxygen

Inch/Pound to SI

Conversion Factors
Abstract

Groundwater-quality data from public and private sources 

for the period 1946 to 2009 were compiled and put into a 

common data repository for the Piceance Basin. The data 

repository is available on the web at http://rmgsc.cr.usgs.gov/

cwqdr/Piceance/index.shtml. A subset of groundwater-quality 

data from the repository was compiled, reviewed, and checked 

for quality assurance for this report. The resulting dataset consists of the most recently collected sample from 1,545 wells, 

1,007 (65 percent) of which were domestic wells. From those 

samples, the following constituents were selected for presentation in this report: dissolved oxygen, dissolved solids, pH, 

major ions (chloride, sulfate, fluoride), trace elements (arsenic, 

barium, iron, manganese, selenium), nitrate, benzene, toluene, 

ethylbenzene, xylene, methane, and the stable isotopic compositions of water and methane. 

Some portion of recharge to most of the wells for which 

data were available was derived from precipitation (most 

likely snowmelt), as indicated by δ2

H [H2O] and δ18O[H2O] 

values that plot along the Global Meteoric Water Line and 

near the values for snow samples collected in the study area. 

Ninety-three percent of the samples were oxic, on the basis of 

concentrations of dissolved oxygen that were greater than or 

equal to 0.5 milligrams per liter. 

Concentration data were compared with primary and 

secondary drinking-water standards established by the U.S. 

Environmental Protection Agency. Constituents that exceeded 

the primary standards were arsenic (13 percent), selenium 

(9.2 percent), fluoride (8.4 percent), barium (4.1 percent), 

nitrate (1.6 percent), and benzene (0.6 percent). Concentrations of toluene, xylenes, and ethylbenzene did not exceed 

standards in any samples. Constituents that exceeded the 

secondary standard were dissolved solids (72 percent), sulfate 

(37 percent), manganese (21 percent), iron (16 percent), and 

chloride (10 percent). Drinking-water standards have not been 

established for methane, which was detected in 24 percent of 

samples. Methane concentrations were greater than or equal to 

1 milligram per liter in 8.5 percent of samples. Methane isotopic data for samples collected primarily from domestic wells 

in Garfield County indicate that methane in samples with 

relative high methane concentrations were derived from both 

biogenic and thermogenic sources. Many of the constituents 

that exceeded standards, such as arsenic, fluoride, iron, and 

manganese, were derived from rock and sediment in aquifers. 

Elevated nitrate concentrations were most likely derived from 

human sources such as fertilizer and human or animal waste. 

Information about the geologic unit or aquifer in which 

a well was completed generally was not provided by data 

sources. However, limited data indicate that Quaternary deposits in Garfield and Mesa Counties, the Wasatch Formation in 

Garfield County, and the Green River Formation in Rio Blanco 

County had some of the highest median concentrations of 

selected constituents. Variations in concentration with depth 

could not be evaluated because of the general lack of welldepth and water-level data.

Concentrations of several important constituents, such 

as arsenic, manganese, methane, and nitrate, were related 

to concentrations of dissolved oxygen. Concentrations of 

arsenic, manganese, and methane were significantly higher in 

groundwater with low dissolved-oxygen concentrations than 

in groundwater with high dissolved-oxygen concentrations. In 

contrast, concentrations of nitrate were significantly higher in 

groundwater with high dissolved-oxygen concentrations than 

in groundwater with low dissolved-oxygen concentrations. 

These results indicate that measurements of dissolved oxygen 

may be a useful indicator of groundwater vulnerability to 

some human-derived contaminants and enrichment from some 

natural constituents.

Assessing such a large and diverse dataset as the one 

available through the repository poses unique challenges for 

reporting on groundwater quality in the study area. The repository contains data from several studies that differed widely 

in purpose and scope. In addition to this variability in available data, gaps exist spatially, temporally, and analytically in 

the repository. For example, groundwater-quality data in the 

repository were not evenly distributed throughout the study 

area. Several key water-quality constituents or indicators, such 

as dissolved oxygen, were underrepresented in the repository. 

Ancillary information, such as well depth, depth to water, and 

the geologic unit or aquifer in which a well was completed, 

was missing for more than 50 percent of samples.

Future monitoring could avoid several limitations of the 

repository by making relatively minor changes to samplecollection and data-reporting protocols. Field measurements 

for dissolved oxygen could be added to sampling protocols, 

Overview of Groundwater Quality in the Piceance Basin, 

Western Colorado, 1946–2009

By J.C. Thomas and P.B. McMahon
2 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

for example. Information on well construction and the geologic 

unit or aquifer in which a well was completed should be part 

of the water-quality dataset. Such changes would increase the 

comparability of data from different monitoring programs and 

also add value to each program individually and to that of the 

regional dataset as a whole. Other changes to monitoring programs could require greater resources, such as sampling 

for a basic set of constituents that is relevant to major waterquality issues in the regional study area. Creation of such a 

dataset for the regional study area would help to provide the 

kinds of information needed to characterize background conditions and the spatial and temporal variability in constituent 

concentrations associated with those conditions. Without such 

information, it is difficult to identify departures from background that might be associated with human activities. 

Introduction

Western Colorado is undergoing large-scale energy development especially in the Piceance Basin. As this development 

proceeds, potential short and long-term changes in groundwater 

quality will require ongoing monitoring and assessment. A 

substantial number of water-resource datasets, publications, 

and other materials have been developed and are potentially 

available for use in assessing existing groundwater quality. 

However, these data have been stored in disparate formats 

among numerous agencies, energy companies, private consulting firms, universities, and stakeholder groups. In order to take 

advantage of existing data and to integrate them with data from 

ongoing studies, the U.S. Geological Survey, in cooperation 

with public and industry partners, developed a web-accessible 

common data repository to provide energy operators, researchers, consultants, agencies, and interested stakeholders equal 

access to existing water-quality information. The following 

is an alphabetical list of cooperators involved in this study: 

Antero Resources, Bureau of Land Management, Bureau of 

Reclamation, Chevron Corporation, Cities of Grand Junction 

and Rifle, Colo., Colorado Department of Agriculture, Colorado Department of Natural Resources, Colorado Department 

of Public Health and Environment, Colorado Division of 

Wildlife—River Watch, Colorado Oil and Gas Conservation 

Commission, Colorado River Water Conservation District, 

Delta County, Colo., EnCana Oil & Gas (USA) Inc., Garfield 

County, Colo., Gunnison Energy Corp., National Park Service, 

Natural Soda, Inc., North Fork River Improvement Association, 

Oxy Petroleum Corporation, Petroleum Development Corp., 

Rio Blanco County, Shell Oil Company, Solvay Chemicals, 

Towns of Carbondale, De Beque, Palisade, Parachute, Rangely, 

and Silt, Colo., U.S. Forest Service, West Divide Water Conservancy District, and Williams Companies, Inc.

Purpose and Scope

This report provides an overview of groundwater-quality 

data that have been compiled and put into a common data 

repository for the Piceance Basin from public and industry 

sources for the period 1946 to 2009. This overview describes 

the availability of groundwater-quality data in the Piceance 

Basin in terms of three characteristics: spatial (where sample 

sites were located), temporal (what is the period of record), 

and analytical (what constituents were sampled). Spatial 

variability in constituent concentrations are described and, 

where possible, examined relative to human and natural 

factors. This overview provides a basis for developing regional 

groundwater monitoring strategies to fill data gaps, to improve 

the understanding of groundwater quality in the basin, and 

to increase the comparability of data derived from existing 

monitoring programs. 

Description of the Study Area

In this report, the Piceance Basin refers to an area 

of approximately 9,500 square miles in western Colorado 

extending from north of Rangley to south of Delta and from 

Glenwood Springs to the Colorado-Utah state border (fig. 1). 

The study area combines structural basins, hydrologic basins, 

and political boundaries whose selection has been based in 

part on mineral-resource extraction, water resources, and 

cooperator interest. 

Geology

The Piceance structural basin is a downwarped region 

surrounded by uplifted regions including the Axial Basin arch 

to the north, the Grand Hogback to the east, the Gunnison 

uplift to the southeast, the Uncompahgre uplift to the southwest, and the Douglas Creek arch to the west (fig. 2). Quaternary alluvial, terrace and valley-fill deposits constitute the 

unconsolidated materials in the valleys. Tertiary sedimentary 

bedrock units crop out in the center of the downwarped region, 

and uplifted regions are underlain primarily by Cretaceous 

sedimentary rocks (fig. 3). 

Quaternary sedimentary deposits and Tertiary and 

Cretaceous sedimentary rocks were the primary host materials 

for aquifers represented in the common data repository 

(table 1). Quaternary deposits included alluvium, terrace 

deposits, and valley fill deposits (fig. 4). The Green River 

and Wasatch Formations were the primary Tertiary units in 

which wells in the study area were screened. The Green River 

Formation, of early Tertiary age, rests conformably on the 

Wasatch Formation (older Tertiary rock). The Green River 

Formation has been divided into four members (from youngest 

to oldest): Evacuation Creek, Parachute Creek, Garden Gulch, 

and Douglas Creek (Bradley, 1931). The name “Evacuation 

Creek Member” was abandoned and its associated rocks 

are assigned to the lower part of the Uinta Formation in the 
Introduction 3

Figure 1. Piceance Basin study area, western Colorado.

Rangely

Glenwood

Springs

Grand

Junction

White River near

Meeker, CO

Gunnison River

at Delta, CO

Colorado River near

Cameo, CO

Piceance Creek at

White River, CO

Yellow Creek near

White River, CO

Colorado River at

Glenwood Springs, CO

Gunnison River near

Grand Junction, CO

Colorado River

near state line

White River near

Rangely, CO

MESA

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

COLORADO

UTAH

GUNNISON

COUNTY

MONTROSE

COUNTY

MOFFAT

COUNTY

DELTA

COUNTY

ROUTT

COUNTY

PITKIN

COUNTY

Rifle

Rulison

Parachute

Silt

Meeker

Montrose

Delta

109° 108° 107°

40°

39°

Base from U.S. Geological Survey 1:100,000-scale digital data

Universal Transverse Mercator projection, Zone 13

Colorado River headwaters plateau

Hydrologic unit

EXPLANATION

Lower Gunnison River

Lower White River

North Fork Gunnison River

Parachute -Roan Creek

Piceance-Yellow Creek

Uncompahgre River

Upper White River

0 10 20 MILES

0 10 20 KILOMETERS

Study area boundary

Streamflow-gaging station

Gunnison River

Un compahgre River

Gunnison Riv er

North Fork Gunnison River

Plateau Creek

East Salt Creek

Roan Creek

Parachute

Creek

Yellow

Creek

Douglas Creek

Wh ite River

Piceance Creek

River basin boundary

Colorado River

COLORADO

Denver

Study area

INDEX MAP
4 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Figure 2. Generalized geologic structures, Piceance Basin, western Colorado. 

Rangely

Glenwood

Springs

Grand

Junction

MESA

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

COLORADO

UTAH

GUNNISON

COUNTY

MONTROSE

COUNTY

MOFFAT

COUNTY

DELTA

COUNTY

ROUTT

COUNTY

PITKIN

COUNTY

Rifle

Rulison

Parachute

Silt

Meeker

Montrose

Delta

109° 108° 107°

40°

39°

Base from U.S. Geological Survey 1:100,000-scale digital data

Universal Transverse Mercator projection, Zone 13

EXPLANATION

0 10 20 MILES

0 10 20 KILOMETERS

Study area boundary

Gunnison River

Un compahgre River

Gunnison Riv er

North Fork Gunnison River

Plateau Creek

East Salt Creek

Roan Creek

Parachute

Creek

Yellow

Creek

Douglas Creek

Wh ite River

Piceance Creek

Colorado River

Cretaceous Mesaverde Group, Williams Fork Formation, 

 Iles Formation, Hunter Canyon Formation

Piceance structural basin boundary

Geology from Green (1992)

Geologic structure modified from Johnson and Flores (2003)

Piceance structural basin from U.S. Geological Survey Oil

Shale Assessment Team (2010)

Piceance

Basin

Axial Basin arch

Douglas Creek arch

Gunnison

uplift

Grand Hogback

White River uplift

Uncompahgre

uplift
Introduction 5

Figure 3. Generalized geologic units in which water wells were completed, Piceance Basin, western Colorado. 

Rangely

MESA

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

COLORADO

UTAH

GUNNISON

COUNTY

MONTROSE

COUNTY

MOFFAT

COUNTY

DELTA

COUNTY

ROUTT

COUNTY

PITKIN

COUNTY

Rifle

Meeker

Montrose

109° 108° 107°

40°

39°

Base from U.S. Geological Survey 1:100,000-scale digital data

Universal Transverse Mercator projection, Zone 13

0 10 20 MILES

0 10 20 KILOMETERS

Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rock

Tertiary sedimentary rock

Cretaceous sedimentary rock

Cretaceous Mesaverde sedimentary rock

Pennsylvanian sedimentary rock

Jurassic sedimentary rock

Triassic sedimentary rock

Study area boundary

Grand

Junction
6 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Table 1. Geologic units and U.S. Geological Survey National Water Information System descriptions of aquifers represented in the 

Piceance Basin common data repository. 

 Geologic unit NWIS aquifer 

 code NWIS aquifer description Sites Count sample

 Count 

individual 

 result

 Range of 

years

Quaternary 

 110QRNR Quaternary System 68 68 1,626 1981 2003

 111ALFP Alluvium, flood plain 61 61 1,812 1973 1983

 111ALVM Alluvium 17 17 224 1958 2006

 111AVMT Alluvium, terrace 63 63 829 1974 2000

 111VLFL Valley-fill deposits 82 82 658 1969 1997

 112GLCL Glacial colluvium 21 21 118 1978 1982

 112TERC Terrace deposits 1 1 53 1977 1977

Quaternary totals 313 313 5,320 1958 2006

Tertiary

 120TRTR Tertiary System 1 1 55 1974 1974

 124EOCN Eocene Series 9 10 681 1982 2000

 124GRRV Green River Formation 128 128 2,532 1969 1988

 124WSTC Wasatch Formation 35 37 815 1975 2007

Tertiary totals 173 176 4,083 1969 2007

Cretaceous 

 210DKOT Dakota Sandstone or Formation 

or Group

 11 12 361 1974 1991

 211FXHL Fox Hills Formation 1 2 53 2003 2003

 211MNCS Mancos Shale 24 24 1,104 1974 2001

 211MVRD Mesaverde Group 82 82 1,374 1951 2006

 217BRCN Burro Canyon Formation 3 3 6 1981 1985

Cretaceous totals 121 123 2,898 1951 2006

Jurassic

 220NVJO Navajo Sandstone 5 5 177 1958 1971

 221BRSB Brushy Basin Shale Member of 

Morrison Formation

 1 1 75 991 1991

 221ENRD Entrada Sandstone 4 4 87 1958 1988

 221MRSN Morrison Formation 2 2 4 1981 1985

Pennsylvanian

 310PMPV Permian-Pennsylvanian Systems 2 2 8 1982 1982

 310WBER Weber Sandstone 5 5 204 1967 1973

 321PSLVU Upper Pennsylvanian Series 1 1 6 1982 1982

 331LDVL Leadville Limestone 3 3 6 1982 1984

Unknown NA Not available 1,464 1,507 59,399 1966 2009
Figure 4. Distribution of sites by geologic unit for wells in the Piceance Basin, western Colorado. Geologic unit designation was based o

from original data source and was not reclassified for this study.

Base from U.S. Geological Survey 1:100,000-scale digital dataUniversal Transverse Mercator projection, Zone 13

100 20 MILES

0 10 20 KILOMETERS

20 4 MILE

0 2 4 KILOMETERS

Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

Meeker Rangely Rifle

INSET MAP

INSET MAP

Mamm Cre

COLORADO

UTAH

Grand

Junction

Montrose

MESA

COUNTY

DELTA

COUNTY

MONTROSE

COUNTY

GUNNISON

COUNTY

PITKIN

COUNTY

GARFIELD

COUNTY

MOFFATCOUNTY ROUTT

COUNTY

OURAY

COUNTY

40°39°

109° 108° 107°

GARFIELD

COUNTY RIO BLANCO

COUNTY
8 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Piceance Basin, a revision in nomenclature based on stratigraphy (Cashion and Donnell, 1974). The Parachute Creek 

Member is a dolomitic marlstone containing soluble minerals 

(such as halite and nahcolite). The Garden Gulch Member is a 

shaley, dolomitic marlstone, and the Douglas Creek Member 

is primarily sandstone. The Green River Formation is well 

known for rich oil shale deposits (for example, the informally 

named Mahogany oil shale zone). The Wasatch Formation 

consists of varicolored mudstone with sandstone lenses 

(Johnson and Flores, 2003). Some of the sandstone lenses, 

such as the Wasatch “G” interval of the Wasatch Formation, 

are notable reservoirs of natural gas near the towns of Parachute and Rulison (Nelson and Santus, 2010) (fig. 1). The 

Wasatch Formation is a source of potable water and also 

contains rich natural gas deposits (URS Corporation, 2006). 

Cretaceous sedimentary rocks of primary interest in the 

study area were the Mesaverde Group, the Mancos Shale, and 

the Dakota Sandstone. The Mesaverde Group consists of the 

Iles Formation and the Williams Fork Formation. The Williams 

Fork Formation is an important natural-gas-producing unit 

within the study area. The Iles Formation contains several 

members, such as the Corcoran Sandstone, Cozzette Sandstone, and Rollins Sandstone Members (Reinecke and others, 

1991). The Mesaverde Group was formed by a series of 

marine transgressions and regressions followed by periods of 

fluvial deposition (Johnson, 1989) which produced a sequence 

of marine shales, siltstones, and sandstones capped by a thick 

sequence of terrestrial fluvial deposits. The fluvial deposits of 

the Mesaverde consist almost entirely of lenticular channel 

sandstones and fine-grained flood-plain deposits. Recovering 

natural gas from channel sandstones, the primary reservoirs, 

requires a dense drilling pattern (Nelson and Santus, 2010). 

The Mancos Shale is composed of massive, fossiliferous 

marine shale with interbedded sandstone, siltstone, and devitrified volcanic ash layers. The Mancos is wholly or partly the 

lateral equivalent of the Niobrara Formation, Cody Shale, and 

lower Pierre Shale in Colorado, Montana, Nebraska, South 

Dakota, and Wyoming (Green, 1992; Wright and Butler, 

1993). The Dakota Sandstone is composed of interbedded 

well-consolidated sandstone, conglomerates, shale, and coal 

(Brooks and Ackerman, 1985). 

Hydrology

The Colorado River flows through the middle of the study 

area from Glenwood Springs to the Colorado-Utah state line 

and has annual mean streamflows of 3,340 cubic feet per 

second (ft3

/s) at Colorado River below Glenwood Springs, 

3,830 ft3

/s at Colorado River near Cameo, and 6,140 ft3/s at the 

state line (fig. 1) (U.S. Geological Survey, 2011). In the northern portion of the study area, Piceance and Yellow Creeks flow 

into the White River; annual mean streamflows at their mouths 

are 35 ft3

/s and 2.8 ft3/s, respectively. The White River flows 

east to west in the northern portion of the study area with average annual streamflows of 620 ft3

/s at White River near Meeker 

and 727 ft3

/s at White River below Boise Creek near Rangely. 

In the southern portion of the study area, the Gunnison River 

has annual mean streamflows of 1,960 ft3

/s at Gunnison 

River at Delta and 2,560 ft3

/s at Gunnison River near Grand 

Junction (fig. 1). 

Sources of recharge to aquifers in the study area include 

snowmelt from upland areas, irrigation in valleys, and upwelling of groundwater from deeper aquifers. Surface-water basin 

boundaries roughly serve as groundwater basin boundaries,

where groundwater elevations in the study area generally

follow the topography. Thus, groundwater flows from 

recharge areas in uplands to discharge areas in valleys. Major 

surface-water drainages such as the Colorado, White, and 

Gunnison Rivers were interpreted as regional discharge areas 

for groundwater. In the Piceance and Yellow Creek drainage 

area, recharge occurs from higher elevations and groundwater 

flows toward Piceance Creek and then to the north. Owing 

to geologic structural controls, groundwater moves upward 

along fractures from deeper aquifers to shallower aquifers in 

the north-central part of the drainage area (Weeks and others, 

1975; Taylor, 1987). In Mesa County near Grand Junction, 

artesian aquifers have existed within the Entrada Sandstone, 

the Wingate Sandstone, the Salt Wash Member of the Morrison Formation, and the Dakota Sandstone (Lohman, 1965). 

The Williams Fork Formation is a semiconfined aquifer under 

artesian pressure specifically in the Garfield County area, 

where upwelling can occur along conduits such as well bores 

or natural fractures (Tyler and others, 1995). 

Land Cover and Land Use

Land cover in the study area includes forest, rangeland, 

agricultural land, and urban areas (fig. 5). Of the 9,500 square 

miles (mi2

) in the study area, about half the total area 

(4,700 mi2

) is forest; about 40 percent (3,400 mi2) of the 

total area is rangeland. Located predominately in valleys and 

adjacent to rivers, about 6 percent (633 mi2

) is agricultural 

land, and less than 1 percent of the total area (69 mi2

) is urban 

land. Grand Junction (population 54,694), Delta (8,708), Rifle 

(8,675), and Meeker (2,409) are the largest population centers 

in the study area (U.S. Census Bureau, 2011). 

Oil shale has historically been an energy resource of great 

interest in the northern part of the Piceance Basin. Oil shale is 

a leaseable mineral according to the Mineral Leasing Act of 

1920 and Executive Order 5327. In the early 1900s an executive order from the President established the Naval Petroleum 

and Oil Shale Reserves within which the oil shale resources 

of Colorado were managed (U.S. Department of Energy, 

2011a). In 1974, oil shale prototype leasing was initiated in the 

Piceance Basin; two leases (Tracts C-a and C-b) were awarded 

in order to determine methods of extracting oil shale while 

maintaining the environmental integrity of the area affected 

(Weeks and others, 1975). The prototype leasing program 

for Tracts C-a and C-b ended owing to various political and 

economic reasons and little was done with oil shale on Federal 
Introduction 9

Figure 5. Land cover and land use, Piceance Basin, western Colorado. Preference right lease areas are research, 

development, and demonstration sites. Grand Mesa snow data from George Ingersoll (U.S. Geological Survey, written 

commun., 2006).

Colorado Oil & Gas Conservation Commission

 Oil & Gas Well 

Project Plowshare site

Rangely

MESA

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

COLORADO

UTAH

GUNNISON

COUNTY

MONTROSE

COUNTY

MOFFAT

COUNTY

DELTA

COUNTY

ROUTT

COUNTY

PITKIN

COUNTY

Rifle

Meeker

Montrose

109° 108° 107°

40°

39°

Base from U.S. Geological Survey 1:100,000-scale digital data

Universal Transverse Mercator projection, Zone 13

0 10 20 MILES

0 10 20 KILOMETERS

Agricultural

Land cover

EXPLANATION

Barren

Forest

Rangeland

Urban or built-up

Tundra

Water

Wetland

Colorado preference right lease area

Study area boundary

EGL

Chevron

Shell #3

Shell #1

Rio Blanco Site

Rulison Site

Land cover from Colorado Decision Support System (2010)

Oil & gas point location data from Colorado Oil and Gas

Conservation Commission (2010)

Preference lease areas from Bureau of Land Management (2009)

Project Plowshare sites from Department of Energy (2011b)

Grand

Junction

Grand Valley area
10 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

lands in the Piceance Basin until 2005 when the Energy Policy 

Act was enacted. Beginning in 2005, the Bureau of Land Management began nominating entities for research, development, 

and demonstration (RD&D) projects targeted at developing 

oil shale in an economically sustainable and environmentally 

responsible fashion. In 2007 in Colorado, three RD&D leases 

of 160 acres each were awarded—one to Shell Frontier Oil 

and Gas, Inc., one to E.G.L Resources, Inc., and one to Chevron USA, Inc. (Bureau of Land Management, 2011a). Ten 

thousand acres were identified as preference right lease areas 

for commercial development within a 10-year term, and with 

the potential for 5-year extensions (Bureau of Land Management, 2011a). 

Nahcolite is also a leasable mineral and is associated with 

oil shale in the Green River Formation in the Piceance Basin. 

As such, it cannot be disposed of during oil shale production, 

and thus it becomes an integral factor in determining the ease 

of mining oil shale in the Piceance Basin. The U.S. Bureau 

of Mines characterized nahcolite resources in the Piceance 

Basin in the late 1970s by use of samples obtained from a 

10-foot-diameter shaft drilled to the nahcolite (saline) zone 

in the northern part of the basin near Piceance Creek (U.S. 

Geological Survey Oil Shale Assessment Team, 2010). On 

the basis of this information, White River Nahcolite Minerals 

LLC began solution mining nahcolite on a Federal lease tract 

in the Piceance Basin. In 2003, AmerAlia Inc. (Natural Soda 

Inc.) purchased the operation and produced about 103,000 tons 

of sodium bicarbonate in 2007. This facility is the only one 

currently (2009) producing sodium bicarbonate from nahcolite 

in the Piceance Basin. The method of mining involves drilling 

to the target bed, injecting hot water to dissolve the nahcolite, 

and then pumping the nahcolite-bearing brine to the surface 

through a production hole adjacent to the injection well. 

The brine is placed in holding ponds where excess water is 

removed, which allows the sodium bicarbonate to recrystallize 

(U.S. Geological Survey Oil Shale Assessment Team, 2010). 

Natural gas development has increased in the study 

area since 2000, in part due to advancements in the application of hydraulic fracturing of tight gas resources (Wasatch 

Formation and Mesaverde Group) which has allowed successful extraction of natural gas from previously inaccessible 

sources (Nelson and Santus, 2010). In Garfield County alone 

between 2004 and 2010, the Colorado Oil and Gas Conservation Commission issued 13,775 application permits to develop 

(fig. 5) (Colorado Oil and Gas Conservation Commission, 

2010). Natural gas development on public lands in Rio Blanco 

County increased from 58 permits in 2001 to 200 permits in 

2006; a total of 2,556 multiple well pads is projected during 

the next 20 years (Bureau of Land Management, 2011b). 

Previous Work

The Piceance Basin in western Colorado contains energy, 

mineral, and other natural resources that have been the subject 

of numerous studies and publications. Selected publications 

were summarized as they relate to water resources within the 

study area. In 1874, the Green River Formation was identified 

in the Piceance Basin, and subsequent studies have focused on 

the energy resources of this formation (for example, oil shale) 

(Donnell, 1961). In 1964, the first investigations of water 

resources were conducted that document the geohydrology 

of the Piceance Basin (Coffin and others, 1968; Coffin and 

others, 1971). Several reports discussed simulated effects of 

oil-shale development and assessed oil shale resources by 

using information learned during earlier prototype leasing 

in the 1970s (for example, Weeks and others, 1975; Taylor, 

1987). These studies were conducted primarily in Rio Blanco 

County in the Piceance Creek and Yellow Creek drainages 

and were focused on oil shale resources. Around the time of 

oil shale prototype leasing, the U.S. Department of Energy 

conducted nuclear gas-stimulation experiments under 

Project Plowshare at several locations including Rio Blanco 

site and Rulison site, both of which lie within the Piceance 

Basin (National Nuclear Security Administration, 2010; 

U.S. Department of Energy, 2011b) (fig. 5). During this time, 

groundwater-resource studies focused on planned energy 

development and small-scale prototype investigations. 

More recently, URS Corporation completed a hydrogeologic study of the Mamm Creek–Divide Creek area in 

Garfield County (fig. 4), located 8 miles southeast of Rifle, 

that described regional hydrology, geology, and groundwater 

chemistry (URS Corporation, 2006). In a second phase of 

investigation in 2007, S.S. Papadopulos & Associates, Inc., 

resampled domestic wells (identified in the phase I investigation) for water quality, composition of hydrocarbon gas, and 

stable isotopic composition of methane. It then sampled produced water and collected natural gas samples from gas wells 

to characterize potential sources of hydrocarbon contamination 

(S.S. Papadopulos & Associates, Inc., 2008). These studies 

provided information on groundwater resources, groundwater 

quality, and activities related to natural gas production. As 

a follow up to these studies (URS Corporation, 2006; S.S. 

Papadopulos & Associates, Inc., 2008), McMahon and others 

(2010) examined sources and sinks of nitrate and methane in 

groundwater from the Wasatch Formation in Garfield County. 

Groundwater quality in the Colorado headwaters 

drainage, including the Grand Valley area (fig. 5), is discussed 

as part of surface-water investigations focused on salinity 

and selenium (Butler and others, 1996; Butler and Osmundson, 2000; Hamilton and others, 2003). Other studies of 

salinity and selenium in surface water and the effects of 

irrigation practices in the lower Gunnison River Basin (Butler 

and others, 1996; Butler and Osmundson, 2000; Thomas, 

2009) discuss groundwater but not comprehensive

groundwater investigations. 
Methods 11

Methods

Groundwater-quality data were compiled into the common data repository and a subset of these data was used in this 

report. These data were summarized to provide information 

about the period of record for each constituent, number of 

values, number of censored values, and exceedances of 

drinking-water standards. The data were evaluated spatially 

within the study area and statistically to compare concentrations of selected constituents at different sites. 

Compilation of Data

A repository of available groundwater-quality data was 

compiled from local, State, and Federal agencies and private 

entities (consulting, energy, and mining companies) to assist in 

the analysis of water resources in the study area (table 2). The 

data repository is available on the web at http://rmgsc.cr.usgs.

gov/cwqdr/Piceance/index.shtml. The goal was for the repository to contain the most comprehensive set of groundwaterquality data in the study area to date. For a variety of reasons, 

however, not all results from known data sources were loaded 

into the repository: data sources that did not participate, data 

not received in electronic format, metadata insufficient, and 

data submitted late. For these reasons, this report represents 

the most comprehensive set of groundwater-quality data available for the Piceance Basin as of August 2009.

As of August 2009, the data repository contained 8,635 

samples and more than 480 constituents, but only a subset of 

these samples (1,545) was analyzed in this report (tables 3 and 4). 

The following constituents were selected for analysis: stable 

isotopes of water, dissolved oxygen, major ions (dissolved 

solids, pH, chloride, sulfate, fluoride), trace elements (arsenic, 

barium, iron, manganese, selenium), nitrate, benzene, toluene, 

ethylbenzene, and xylene, methane, and isotopic composition 

of methane. Duplicate results (the same sample submitted to 

the repository by two or more source agencies) were removed 

prior to analysis. For sites with more than one sample, only the 

most recent, comprehensive groundwater sample was used for 

analysis. Where major-ion data were available, a charge 

balance was computed as part of the water-quality review, 

gross errors were flagged in the database, and those results 

were removed from data analysis. In using these datasets to 

describe water quality in the Piceance Basin, it is important 

to remember that the repository as a whole is a collection of 

multiple studies with multiple objectives. Thus, it is not 

surprising that the samples were not all analyzed for the 

same set of chemical constituents. Many samples, however, 

also lacked important ancillary information that was needed 

to place them in proper hydrologic context. Such ancillary 

information included well depth, depth to water, well type, and 

geologic unit or aquifer. Only 33 percent of the samples had 

well-depth information, 19 percent had geologic-unit or aquifer designations, and 5 percent had depth-to-water information, but all did have well-type information (tables 5 and 6). 

Types of Analysis Used

Various types of analysis were used to evaluate 

groundwater-quality data for this report. Concentration data 

were evaluated spatially by plotting them on a map of the 

study area with either geology layer or land use layer. Stableisotope results use the standard delta (δ) notation, in per mil 

(

0

/

00, parts per thousand). Stable oxygen-iostopic composition 

of water samples (δ18O[H2

O]sample) are equal to 

δ18O[H2

O]sample =(( 18O/16O)sample/(18O/16O)ref-1)*1000

where 18O/16O is the ratio of the oxygen-18 to 

 oxygen-16 isotopes in the sample and 

 the reference (ref) material. 

Values of δ2

H [H2O] and δ18O[H2O] were referenced to the 

Vienna Mean Ocean Water scale (Coplen, 1988). 

Groundwater composition was represented by using 

trilinear plots of major anions and cations. Of the 1,545 sites, 

1,007 were classified as domestic wells on the basis of information provided by the data source (table 4). Because more 

than half of the wells were being used for domestic water 

supply, data were compared with drinking-water standards 

even though none of these standards are required or enforced 

for domestic water supplies. Where applicable, constituents 

were compared to constituents listed in primary and secondary 

drinking-water standards established by the U.S. Environmental Protection Agency (USEPA). The USEPA National Primary 

Drinking Water Regulations (herein referred to as “primary 

standards”) are legally enforceable standards that apply to 

public water systems. Primary standards are intended to 

protect public health by limiting the concentrations of contaminants in drinking water and were used in this report to provide 

a context for evaluating groundwater quality in the Piceance 

Basin (U.S. Environmental Protection Agency, 2010). Data 

also were compared with National Secondary Drinking Water 

Regulations (herein referred to as “secondary standards”), 

which are nonenforceable guidelines for constituents that may 

cause cosmetic effects (such as skin or tooth discoloration) 

or have poor aesthetic qualities (such as poor taste, odor, 

or color) in drinking water (U.S. Environmental Protection 

Agency, 2010). The geologic unit and aquifer in which a 

well was completed were important information for evaluating water-quality data and were used to group concentration 

data by constituent. Water-quality samples were stratified 

by county, geologic unit, and aquifer, and results for sample 

counts greater than or equal to 10 were considered sufficient 

and retained for further analysis and presentation in this report. 

The determination of chemical properties of waters can 

result in nondetects (zero and negative values, “left-censored 

data”) because of analytical limits of the laboratory analysis. In a 

dataset of this breadth, nondetect data can reflect several forms 

of bias, such as antiquated methods for storing nondetects 

and changes in the meaning of “less than” values. Therefore, 
Table 2. Data sources that contribute to the Piceance Basin common data repository of groundwater data, 1946–2009. Duplicate data and all but thand results were removed. Agency Name Sites Samples Date range Results Antero Resources 159 223 7/12/2005 7/16/2009 9,749 City of Grand Junction 3 67 6/22/1988 10/28/2008 813 Colorado Department of Agriculture 43 43 3/31/1998 10/26/2000 354 Colorado Oil and Gas Conservation 1,048 2,861 4/2/1956 10/14/2008 63,234 Commission EnCana Oil & Gas (USA) Inc. 496 2,991 5/4/2001 4/13/2009 119,233 Mine Consultant 24 24 8/10/1995 12/6/2006 139 Oxbow Mining 1 1 8/10/2006 8/10/2006 5 U.S. Forest Service 1 3 9/27/2006 6/27/2007 71 U.S. Geological Survey 1,228 2,391 7/16/1946 4/27/2009 35,433 Willams 12 16 8/30/2006 10/6/2008 699 Wright Water Engineeres, Inc, CO 15 15 4/26/2002 7/17/2002 75 Constituent catergories1 Inorganic Organic Inorganic Inorganic Inorganic Micro- Organic 

 Agency Name com- com- Phys

compounds, compounds, compounds, biological and other 

Information pounds, Nutrient pounds chara

major ions, minor ions, minor ions, constitu- com- 

major ions, and istic

nonmetals metals nonmetals ents pounds 

metals pesticide Antero Resources 892 892 1,465 1,081 573 442 669 1,338 1,507 City of Grand Junction 70 73 278 76 73 99 16 116 

Colorado Department of Agriculture 84 82 21 41 126 Colorado Oil and Gas Conservation 6,611 14,223 3,838 1,924 2,018 3,852 12,835 101 10,014 

Commission EnCana Oil & Gas (USA) Inc. 5,807 8,401 20,101 5,396 3,174 3,945 6,857 23,415 24,995 

Mine Consultant 20 34 15 70

Oxbow Mining 1 1 3

U.S. Forest Service 27 20 21

U.S. Geological Survey 2,459 4,024 6,740 5,261 1,541 3 2,881 1,952 486 9,175 

Willams 38 64 140 128 48 28 60 81 95

Wright Water Engineeres, Inc, CO 15 2 13 45

1 Examples of constiuents for “Information” would be sampling purpose, methods, analyzing agency. Examples for “Inorganics, Major, Metals” would include calcium, mag

Examples of constiuents for “Inorganics, Major, Non-metals” would include chloride and sulfate. Examples of constiuents for “Inorganics, Minor, Metals” would be manganeconstiuents for “Inorganics, Minor, Non-Metals” would be arsenic and selenium. Examples of constiuents for “Microbiological” would be fecal coliform and iron reducing bacfor “Nutrient” would be nitrate as N and total phosphorus. Examples of constiuents for “Organics, Other” would be benzene, toluene, and methane. Examples of constiuents fobe alachlor and chlorpyrifos. Examples of constiuents for “Physical” would be field parameters and depth to water. Examples of constiuents for “Radiochemical” would be uraconstiuents for “Stable Isotopes” would be carbon-13/carbon-12 ratio in methane and deuterium/protium ratio in methane.
Overview of Groundwater Quality in the Piceance Basin 13

these results should be considered with this limitation in mind 

(Helsel, 2005a). Where multiple censoring levels exist for a 

single constituent, data were not edited to a common censoring level for summary statistics in this report (Helsel, 2005b). 

Summary statistics were computed by using Kaplan-Meier 

methods when no more than 50 percent of the observations 

were censored (Helsel, 2005b). Maximum likelihood estimations were computed for greater than 50 observations and 

where 50 to 80 percent of the observations were censored. The 

data range, censoring levels, and maximum observation were 

reported where more than 80 percent of the observations were 

censored (Helsel, 2005b).

Dissolved-oxygen concentrations and methane concentrations were also used to stratify concentration data for each 

constituent. Dissolved-oxygen data were used to determine if 

a sample was oxic (dissolved-oxygen concentrations greater 

than or equal to 0.5 milligrams per liter (mg/L)) or anoxic 

(dissolved-oxygen concentrations less than 0.5 mg/L) 

(McMahon and Chapelle, 2008). Methane concentrations 

greater than or equal to 1 mg/L were considered high; methane 

concentrations less than 1 mg/L were considered low (McMahon and others, 2010). The nonparametric Wilcoxon rank sum 

test was used to identify statistically significant differences 

(p <0.05) in average constituent concentrations belonging 

to different groups (for example anoxic as compared to oxic 

samples) (Helsel and Hirsch, 2002). 

Overview of Groundwater Quality in 

the Piceance Basin

This report provides an overview of constituents, which 

include stable isotopes of water, dissolved oxygen, major 

ions (dissolved solids, pH, chloride, sulfate, fluoride), trace 

elements (arsenic, barium, iron, manganese, selenium), nitrate, 

benzene, toluene, ethylbenzene, and xylene, methane, and 

isotopic composition of methane. These were analyzed 

because they accounted for most of the exceedances of 

water-quality standards in the data repository. Other data, 

such as dissolved-oxygen concentrations and water and 

methane isotopic values, provide understanding with respect 

to the water sources and fate and transport of the selected 

constituents.

Sources of Recharge to Wells

Recharge to most wells in the study area was derived 

from precipitation, as indicated by the ratio of deuterium (2

H) 

and protium (1

H) (δ2H [H2O]) and the ratio of 18O and 16O in 

water (δ18O[H2

O]) values which plot along or near the Global 

Meteoric Water Line (GMWL) (Craig, 1961). 

Data for Grand Mesa snow and for Mesaverde Group 

produced water were plotted to provide additional context 

for these stable-isotope values in the study area. Grand Mesa 

snow samples were intended to generally represent precipitation from higher elevations and colder temperatures, whereas 

produced waters from the Mesaverde Group were intended to 

generally represent produced water and/or deep groundwater. 

Extensive faulting and fracturing in the study area and 

drilling for natural gas provide potential conduits through 

which deep groundwater can move upward into freshwater 

aquifers. Chemical and isotopic characterization of deep 

groundwater allows its presence in the shallow aquifers to be 

recognized and the ability to know from which deep geologic 

unit it originated. These comparisons were somewhat qualitative because the isotopic composition of various types of 

produced waters in the study area were not well characterized, 

nor was the composition of water from below the sampled 

aquifers but above the gas-producing intervals. Most of the 

groundwater samples plotted near the snow samples, indicating that they were probably recharged at higher elevations or 

colder temperatures (or both), similar to the conditions on the 

Grand Mesa. 

Methane concentrations were greater than 1 mg/L 

(high methane concentrations) in 75 samples, but only 4 

had associated δ2

H [H2O] and δ18O[H2O] concentrations to 

provide an understanding of sources of recharge for such 

groundwater samples. Hydrogen and oxygen isotope concentrations of samples with low methane concentrations (less 

than 1 mg/L) plot relatively close to those of snow samples. 

Hydrogen and oxygen isotope concentrations of samples from 

two sites (report numbers 164 and 807 in appendix 1) had 

high methane concentrations and plot along the GMWL but 

away from Grand Mesa snow and report number 807 plots 

closer to produced water from the Mesaverde Group (fig. 6). 

Hydrogen and oxygen isotope concentrations of samples for 

report numbers 226 and 465 (appendix 1) had high methane 

concentrations and plotted to the right of the meteoric water 

line, similar to hydrogen and oxygen isotope concentrations of 

samples of produced water from the Mesaverde Group. These 

data indicate that samples from those two sites may represent 

much older and deeper formation water than samples from 

other sites. Report number 226, a domestic well in Garfield 

County, is likely completed in the Tertiary Wasatch Formation 

(completion interval not provided by the data source) (URS 

Table 3. Summary of groundwater-quality-data reduction from 

site, sample and qw_result tables for data analysis for Piceance 

retrospective water-quality data base. Duplicate data and all but 

the most recent sample and results were reviewed.

Table name All groundwater 

data1

Groundwater data 

summarized 

here2

Site 3,058 1,587

Sample 8,635 1,587

QW_RESULT 229,805 53,924

1

In Piceanc Basin common data repository; see table 3.

2

See table 4.
Table 4. Categories of groundwater-quality data used in this overview analysis by source in the Piceance Basin common data repository, 1946–200

 Agency Name Total sites Domestic wells Agri- cultural wells Observation wells Other Sam- ples Date range Results Antero Resources 159 159 159 8/25/2005 7/16/2009 6,526 City of Grand Junction 3 3 3 5/7/2002 10/28/2008 74 Colorado Department of Agriculture 43 33 10 43 3/31/1998 10/26/2000 354 Colorado Oil and Gas Conservation Commission 506 449 1 10 46 508 9/12/1977 10/14/2008 11,810 EnCana Oil & Gas (USA) Inc. 354 293 12 49 354 8/8/2001 4/13/2009 13,213 Mine Consultant 24 24 24 8/10/1995 12/6/2006 139 Oxbow Mining 1 1 1 8/10/2006 8/10/2006 5 U.S. Forest Service 1 1 1 6/27/2007 6/27/2007 23 U.S. Geological Survey 468 100 25 331 12 468 3/29/1951 4/27/2009 13,139 Williams 12 11 1 12 8/30/2006 10/6/2008 593 Wright Water Engineeres, Inc, CO 15 15 15 4/26/2002 7/17/2002 75

1 Examples of constiuents for “Information” would be sampling purpose, methods, analyzing agency. Examples for “Inorganics, Major, Metals” would include calcium, mag

of constiuents for “Inorganics, Major, Non-metals” would include chloride and sulfate. Examples of constiuents for “Inorganics, Minor, Metals” would be manganese and iron“Inorganics, Minor, Non-Metals” would be arsenic and selenium. Examples of constiuents for “Microbiological” would be fecal coliform and iron reducing bacteria. Examplewould be nitrate as N and total phosphorus. Examples of constiuents for “Organics, Other” would be benzene, toluene, and methane. Examples of constiuents for “Organics, Pchlorpyrifos. Examples of constiuents for “Physical” would be field parameters and depth to water. Examples of constiuents for “Radiochemical” would be uranium and tritium

“Stable Isotopes” would be carbon-13/carbon-12 ratio in methane and deuterium/protium ratio in methane.

 Agency name

Constituent catergories1

Information

Inorganic 

compounds, 

major ions, 

metals

Inorganic 

compounds, 

major ions, 

non-metals

Inorganic 

compounds, 

minor ions, 

metals

Inorganic 

compounds, 

minor ions, 

non-metals

Microbiological 

constituents Nutrient

Organic 

and other 

compounds

Organic 

compounds 

and 

pesticide

Physical 

characteristics

c

Antero Resources 636 636 1,072 908 436 314 477 954 1,093

City of Grand Junction 12 42 11 4 3 

Colorado Department of Agriculture 84 82 21 41 126

Colorado Oil and Gas Conservation 

Commission

1,683 2,959 1,181 464 199 957 2,609 24 1,634 

EnCana Oil & Gas (USA) Inc. 689 1,255 2,661 1,046 492 457 978 2,606 2,859 Mine Consultant 20 34 15 70

Oxbow Mining 1 1 3

U.S. Forest Service 9 7 7U.S. Geological Survey 715 1,656 2,547 2,252 589 3 1,243 256 126 3,385 Williams 33 56 122 112 42 24 52 71 81

Wright Water Engineeres, Inc, CO 15 2 13 45
Overview of Groundwater Quality in the Piceance Basin 15

 County Geologic unit Aquifer Sample count

Delta Quaternary -- 25

 Tertiary Undifferentiated 1

 Cretaceous Mesaverde 20

Mancos 4

Dakota 1

 Other -- 0

 Unknown -- 72

Garfield Quaternary -- 14

 Tertiary Green River 4

Wasatch 31

 Cretaceous Mesaverde 1

 Other -- 0

 Unknown -- 979

Gunnison Quaternary -- 1

 Tertiary -- 0

 Cretaceous Mesaverde 1

 Other -- 0

 Unknown -- 1

Mesa Quaternary -- 58

 Tertiary Wasatch 8

 Cretaceous Fox Hills 2

Table 6. Number of water-quality samples by county, geologic unit, and aquifer, Piceance Basin, western Colorado. 

[Most samples discussed in this report lacked information about geologic unit or aquifer in which well was completed]

[--, Not present, not sampled, or unknown]

 County Geologic unit Aquifer Sample count

Mesa Mancos 13

 Other -- 3

 Unknown -- 95

Moffat Quaternary -- 1

 Tertiary -- 0

 Cretaceous Mesaverde 2

 Other -- 10

 Unknown -- 9

Montrose Quaternary -- 4

 Tertiary -- 0

 Cretaceous Mancos 1

Dakota 6

 Other -- 0

 Unknown -- 6

Rio Blanco Quaternary -- 41

 Tertiary Green River 31

Wasatch 4

Undifferentiated 9

 Cretaceous Mesaverde 6

 Other -- 3

 Unknown -- 139

Number (percentage) of samples Number (percentage) of samples by well type

Well-depth data Depth-to-water data Domestic Observation Irrigation Other

 529 (33 percent) 75 (5 percent) 1,045 (66 percent) 444 (28 percent) 39 (2 percent) 58 (4 percent)

Table 5. Number and percentage of water-quality samples discussed in this report with associated well-depth, depth-towater, and well-type information.
16 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Figure 6. Stable isotopic composition of water from water wells compared with stable isotopic composition of snow from 

Grand Mesa, Colo., and produced waters from the Mesaverde Group, Piceance Basin, western Colorado. Report No., report 

number as provided in appendix 1. Grand Mesa snow data are unpublished U.S. Geological Survey data (George Ingersoll, 

U.S. Geological Survey, written commun., 2006).

282

δ18O[H2O], in per mil relative to Vienna Standard Mean Ocean Water

δ2H[H O], in per mil relative to Vienna Standard Mean Ocean Water

2

–160

–20 –18 –16 –14 –12 –10 –8 –6 –4 –2 0

–140

–120

–100

–80

–60

–40

–20

0

807

164

164

465

226

Global Meteoric Water LIne of Craig, 1961

Methane concentration

Snow from Grand Mesa, Colorado

Report number

Mesaverde Group produced water, Garfield

 County, Colorado

Less than 1 milligram per liter

Unknown

Greater than or equal to 1 milligram per liter

EXPLANATION
Overview of Groundwater Quality in the Piceance Basin 17

Corporation, 2006). Report number 465, an observation 

well in Garfield County, is completed in the Cretaceous 

Mesaverde Group. 

Dissolved Oxygen 

Reduction-oxidation (redox) processes affect the 

chemical quality of groundwater in all aquifer systems. 

Redox processes can mobilize or immobilize potentially toxic 

metals associated with naturally occurring aquifer materials, 

contribute to the degradation or preservation of anthropogenic contaminants, and generate undesirable byproducts 

such as dissolved ferrous iron, hydrogen sulfide, and methane. 

Dissolved-oxygen (DO) concentrations can be used as an 

indicator of redox processes within groundwater systems 

(McMahon and Chapelle, 2008). For example, McMahon and 

others (2010) mapped a low-DO zone in the Wasatch Formation south of the town of Silt in Garfield County, where both 

denitrification (the primary sink for nitrate in groundwater) 

and biogenic methanogenesis were observed. In general, 

such maps of DO concentration can be used to assess an 

aquifer’s vulnerability to contamination by a variety of 

redox-sensitive chemicals. DO concentrations greater than 

or equal to 0.5 mg/L generally indicate oxic conditions and 

DO concentrations less than 0.5 mg/L indicate anoxic conditions (McMahon and Chapelle, 2008). In oxic groundwater, 

dissolved chemicals such as nitrate, uranium, and selenium 

tend to persist, but constituents such as methane and BTEX 

(benzene, toluene, ethylbenzene, and xylene) tend to degrade. 

In anoxic groundwater, conditions favor mobilization of 

arsenic from aquifer solids, production of biogenic methane, 

and degradation of dissolved nitrate (Chapelle and others, 

1995; McMahon and Chapelle, 2008). 

DO concentrations, measured between 1983 and 2009, 

were available for 733 wells (representing 47 percent of the 

wells in appendix 1). Concentrations ranged from less than 0.1 

to 14 mg/L, with a median of 3.2 mg/L (table 7). Ninety-three 

percent of the samples had DO concentrations indicative of 

oxic conditions (table 7.). DO samples were collected primarily in Garfield County near Rifle and many of the anoxic wells 

were located in the Mamm Creek–Divide Creek area (fig. 7). 

Few of the sample data included information on the completion intervals, but at least 10 DO samples were assigned to 

the Wasatch Formation in Garfield County and to Quaternary 

deposits in Mesa County. Of those, 70 percent and 68 percent 

of those samples, respectively, were characterized as 

oxic (table 8). 

Because DO in groundwater is obtained from the atmosphere, DO concentrations in groundwater typically decrease 

with depth below water as it is consumed by redox processes. 

Understanding the relations between DO concentration and 

depth in aquifers is helpful for placement of water-well 

screens in relation to the distribution of certain redox-sensitive 

chemicals. Because of the lack of well-depth and water-level 

information, this study did not examine the relation between 

DO concentration and depth at the regional scale (table 5). 

An alternative method of analysis uses DO data stratified by 

geologic unit or aquifer, but those data also were generally 

lacking (table 8). 

Major Ions 

Dissolved solids (DS) are widely used in evaluating water 

quality because they can be correlated with certain major ions 

and with specific conductance to determine water-quality 

characteristics such as salinity (Hem, 1989). This information 

can suggest water sources; deeper sources tend to have high 

DS concentrations and are also high in certain constituents 

such as chloride. DS concentrations measured between 1958 

and 2009 were available for 684 wells, and 497 concentrations 

(72 percent) exceeded the secondary drinking-water standard

of 500 mg/L (table 7). DS exceedances were relatively 

widespread in the study area (fig. 8). DS concentrations 

ranged from 139 to 66,600 mg/L, with a median of 840 mg/L 

(table 7). The highest concentration was in a sample from an 

observation well that was screened in rocks of Tertiary age 

in Rio Blanco County (appendix 1). Of samples for which 

the geologic unit or aquifer was designated, only the Wasatch 

Formation in Garfield County had 10 or more DS values. 

The median DS concentration in that unit was 1,135 mg/L 

(table 8), which exceeds the secondary standard. The National 

Academy of Sciences recommends that water with DS concentrations greater than 7,000 mg/L should not be used for watering livestock (ALL Consulting, 2003). Where the geologic 

unit was known, DS concentrations greater than 7,000 mg/L in 

the study area were found in association with rocks of Tertiary 

and Cretaceous age (fig. 8 and appendix 1). 

Major ion chemistry was used to evaluate the composition of dissolved solids within the study area (fig. 9A). Major 

ion chemistry of DS concentrations greater than 1,000 mg/L 

were mostly sodium-sulfate or sodium-bicarbonate-sulfate 

waters, whereas major ion chemistry of DS concentrations 

below 1,000 mg/L were mostly mixed cation bicarbonate 

waters (fig. 9A). Major ion chemistry was also plotted by 

geologic unit where this information was available. Waterquality samples from wells screened in Quaternary units 

were mixed cation–sulfate or mixed cation–bicarbonate waters 

(fig. 9B). Water samples from wells screened in Cretaceous 

units were mostly mixed cation—sulfate waters. Waterquality samples from wells screened in aquifers with unknown 

geologic units plot into three water types; type 1, calcium 

magnesium–bicarbonate water; type 2, sodium–bicarbonate 

water; and type 3, sodium–sulfate water. Samples from wells 

screened in aquifers with unknown geologic units that plot 

with water type 1 may be most similar to samples from wells 

screened in aquifers from Tertiary geologic units. Type 2 and 

type 3 waters have cation compositions similar to those of 

produced waters from Mesaverde and Wasatch wells (fig. 10), 

but they typically have lower chloride and DS concentrations 

than the produced waters.
18 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Constituent Observations

Value Detections

Minimum Median Maximum Detections

Percentage 

of total 

observations

Date range of observations

Dissolved oxygen, water, unfiltered, 

milligrams per liter

733 0.1 3.2 14.0 N/A N/A 8/3/1983 7/16/2009

Total dissolved solids, milligrams 

per liter

686 139 840 66,630 N/A N/A 7/14/1958 7/16/2009

pH, standard units 1,444 3.47 7.63 12.8 N/A N/A 7/14/1958 7/16/2009

Sulfate, water, filtered, milligrams 

per liter

1,229 <5, <2.5, <0.31, 

<0.30

155 18,000 1,211 98.5% 3/29/1951 7/16/2009

Chloride, water, filtered, milligrams 

per liter

1,203 <1, <0.1 22.2 18,000 1,173 97.5% 3/29/1951 7/16/2009

Fluoride, water, filtered, milligrams 

per liter

1,138 <2.5, <2.0, <1.0, 

<0.5, <0.4, 

<0.1

 0.64 95 1,045 91.8% 7/14/1958 7/16/2009

Iron, water, filtered, micrograms 

per liter

589 <100, <70, <60, 

<50, <40, 

<30, <18, 

<10, <9, <8 

 40 110,000 321 54.5% 4/5/1968 4/27/2009

Arsenic, water, filtered, micrograms 

per liter

256 <1, <15, <2, 

<20, <3, <5

 1 1,100 165 64.5% 12/19/1971 10/28/2008

Barium, water, filtered, micrograms 

per liter

193 <100, <200 100 5,300 162 83.9% 4/5/1968 4/13/2009

Manganese, water, filtered, micrograms per liter681 <20, <15, <10, 

<5, <3, <1, 

<0.2 

 6 8,900 368 54.0% 4/5/1968 4/26/2009

Selenium, water, filtered, micrograms per liter551 <20, <15, <5, 

<4.8, <2.4, 

<2.0, <1.0, 

<0.7 

 5 1,640 298 54.1% 5/30/1972 10/6/2008

Nitrate as nitrogen, water, filtered, 

millgrams per liter

791 <0.4, <0.32, 

<0.29, <0.24, 

<0.16, <0.09, 

<0.08, <0.07, 

<0.06, <0.05, 

<0.04

 0.206 179 601 76.0% 7/14/1958 7/16/2009

Benzene, water, unfiltered, recoverable, micrograms per liter808 <5, <1, <0.5, 

<0.4, <0.3, 

<0.2, <0.001,

<0.0005

NA 160 11 1.4% 9/13/1989 10/1/2008

 (all data

 7/16/2009)

Toluene, water, unfiltered, recoverable, micrograms per liter808 <5, <3, <2, <1, 

<0.5, <0.4, 

<0.2, <0.005

NA 14 38 4.7% 6/2/1997

 (9/13/1989 

 all data)

 9/30/2008

(7/16/2009

 all data)

Ethylbenzene, water, unfiltered, 

recoverable, micrograms per liter

806 <5, <3, <2, 

<0.5, <0.001, 

<0.0005 

NA 4.8 6 0.7% 9/13/1989 

 (all data)

 7/16/2009 

 (all data)

Xylene (all isomers), water, unfiltered, recoverable, micrograms 

per liter

526 <3, <1.5, <0.003, 

<0.0015 

NA 3.6 7 1.3% 9/13/1989 

 (all data)

 7/16/2009 

 (all data)

Methane, water, unfiltered, recoverable, milligrams per liter874 <0.01, <0.001, 

<0.0008

 0.001 36.7 207 23.6% 6/2/1997 7/16/2009

Table 7. Summary analyses in the Piceance Basin common data repository of constituents discussed in this report.

[<, less than; ≥, greater than or equal to; >, greater than; N/A, not applicable; --, unknown]
Overview of Groundwater Quality in the Piceance Basin 19

Constituent

Standard Exceedances

Standard Standard 

units Standard type Exceedances

Percentage 

of total 

observations

Date range of exceedances

Dissolved oxygen, water, 

unfiltered, milligrams per 

liter

 <0.5 mg/L anoxic conditions 51 7 8/3/1983 4/25/2009

 ≥0.5 mg/L oxic conditions 682 93 4/2/1991 7/16/2009

Total dissolved solids, 

milligrams per liter

 500 mg/L EPA Secondary Drinking 

water standard

497 72 5/24/1966 7/16/2009

pH, standard units 6.5 NA EPA Secondary Drinking 

water standard

15 1 8/29/1977 11/15/2006

 8.5 NA EPA Secondary Drinking 

water standard

95 7 2/1/1967 12/3/2008

Sulfate, water, filtered, 

milligrams per liter

 250 mg/L EPA Secondary Drinking 

water standard

460 37 2/1/1967 7/16/2009

Chloride, water, filtered, 

milligrams per liter

 250 mg/L EPA Secondary Drinking 

water standard

123 10 5/24/1966 4/25/2009

Fluoride, water, filtered, 

milligrams per liter

 4 mg/L EPA Primary Drinking 

water standard

96 8 5/24/1966 4/26/2009

Iron, water, filtered, 

micrograms per liter

 300 ug/L EPA Secondary Drinking 

water standard

96 16 8/14/1972 7/5/2006

Arsenic, water, filtered, 

micrograms per liter

 10 ug/L EPA Primary Drinking 

water standard

33 13 11/12/1972 7/13/2007

Barium, water, filtered, 

micrograms per liter

 2,000 ug/L EPA Primary Drinking 

water standard

8 4 8/18/1975 1/14/2003

Manganese, water, filtered, 

micrograms per liter

 50 ug/L EPA Secondary Drinking 

water standard

140 21 7/11/1972 4/26/2009

Selenium, water, filtered, 

micrograms per liter

 50 ug/L EPA Primary Drinking 

water standard

51 9 2/21/1992 9/17/2008

Nitrate as nitrogen, water, 

filtered, millgrams per liter

 10 mg/L EPA Primary Drinking 

water standard

13 2 4/2/1991 10/14/2008

Benzene, water, unfiltered, 

recoverable, micrograms 

per liter

 5 ug/L EPA Primary Drinking 

water standard

5 1 9/13/1989 10/1/2008

Toluene, water, unfiltered, 

recoverable, micrograms 

per liter

 1,000 ug/L EPA Primary Drinking 

water standard

0 0 -- --

 Ethylbenzene, water, unfiltered, 

recoverable, micrograms per 

liter

 700 ug/L EPA Primary Drinking 

water standard

0 0 -- --

Xylene (all isomers), water, 

unfiltered, recoverable, 

micrograms per liter

10,000 ug/L EPA Primary Drinking 

water standard

0 0 -- --

Methane, water, unfiltered, 

recoverable, milligrams 

per liter

 <1 mg/L 799 91 6/2/1997 4/26/2009

1 to 10 mg/L 65 7 9/15/1999 10/1/2008

 >10 mg/L 10 1 1/28/2003 4/26/2009

Table 7. Summary of analyses of data in the Piceance Basin common data repository for constituents discussed in this 

report.—Continued

[<, less than; ≥, greater than or equal to; >, greater than; N/A, not applicable; --, unknown]
Figure 7. Concentrations of dissolved oxygen in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, gr

Base from U.S. Geological Survey 1:100,000-scale digital dataUniversal Transverse Mercator projection, Zone 13

100 20 MILES

0 10 20 KILOMETERS

20 4 MILES

0 2 4 KILOMETERS

Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

Stu

Qu

Geo sc

LeGr

Dis pe

TeCrUn

COLORADO

UTAH

40°39°

109° 108° 107°

Grand

Junction

Montrose

MESA

COUNTY DELTA

COUNTY

MONTROSE

COUNTY

GUNNISON

COUNTY

PITKIN

COUNTY

GARFIELD

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

MOFFATCOUNTY ROUTT

COUNTY

OURAY

COUNTY

Rifle Meeker Rangely

INSET MAP

INSET MAP

Mamm Creek–Divide C
County Geologic unit Aquifer

Dissolved oxygen Dissolved solids 

Median 

concentration 

(range), mg/L

n

Percentage 

of oxic 

(O2 ≥ 0.5 mg/L) 

samples

Median 

concentration 

(range), mg/L

n

Percent 

exceedances 

(SMCL=500 mg/L)

Median 

concentration (rang

mg/L

Delta Quaternary -- -- (--) 0 -- -- (--) 0 -- 761 (2.1–3,243) 

Cretaceous Mesaverde -- (--) 0 -- -- (--) 0 -- 18 (1.0–510) 

Garfield Quaternary -- 0.9 (0.1–1.7) 2 50 4,773 (2,819–6,726) 2 100 490 (170–3,729) 

Tertiary Wasatch 1.5 (0.1–8.6) 23 70 1,135 (558–5,281) 20 100 357 (15.7–2,882) 

Mesa Quaternary -- 0.9 (0–2.3) 28 68 6,460 (--) 1 100 2,907 (548–5,582) 

Cretaceous Mancos 0.9 (0.1–3.5) 9 68 4,460 (3,820–16,100) 6 100 2,800 (1,224–8,400) 

Rio Blanco Quaternary -- -- (--) 0 -- 1,908 (214–3,664) 3 67 340 (13.0–1,741) 

Tertiary Green River -- (--) 0 -- 926 (909–944) 2 100 140 (4.2–850) 

County Geologic unit Aquifer

Chloride Fluoride N

Median 

concentration 

(range), mg/L

n

Percent 

exceedances 

(SMCL=250 

mg/L)

Median concentration 

(range), mg/L n

Percent exceedances (MCL=4 

mg/L)

Median 

concentration (rang

mg/L as N

Delta Quaternary -- 8.76 (6.40–11.0) 4 0 0.68 (0.50–1.50) 4 0 -- (--) 

Cretaceous Mesaverde 14.0 (2.70–180) 11 0 0.80 (0.20–5.40) 11 9 -- (--) 

Garfield Quaternary -- 20.5 (12.0–281) 6 17 1.10 (0.48–2.44) 6 0 7.52 (1.37–13.7) 

Tertiary Wasatch 43.3 (<1.0 –1,116) 29 7 0.97 (0.33–5.10) 29 7 0.40 (<0.038–6.7

Mesa Quaternary -- 367 (20.0–1,201) 20 70 0.54 (0.11–1.21) 19 0 5.78 (--) 

Cretaceous Mancos 215 (34.5–4,880) 10 30 0.71 (0.30–5.52) 10 10 2.64 (<0.04–7.58

Rio Blanco Quaternary -- 19.0 (4.00–270) 29 3 0.80 (0.10–33.0) 29 21 0.30 (<0.08–0.54

Tertiary Green River 13.0 (0.1–1,700) 31 10 5.00 (<0.10 –47.0) 31 52 <0.08 (<0.08–<0.0

Table 8. Concentrations of selected water-quality constituents, by county, geologic unit, and aquifer. The majority of samples discussed in this refor geologic unit or aquifer.

[mg/L, milligrams per liter; μg/L, micrograms per liter; MCL, maximum containment level; SMCL, secondary maximum containment level; --, not applicable; ≥ less than or 
Iron Manganese 

County Geologic unit Aquifer Median concentration range, μg/L n Percent exceedances (SMCL=300 μg/L) Median concentration n (range), μg/L Percent exceed- ances (SMCL=50 μg/L) Median concentrat

(range), μg/L 

Delta Quaternary -- 40 (<10–60) 3 0 <10 (<10–20) 4 0 1.38 (<1–5.00) 

Cretaceous Mesaverde 150 (10–580) 11 27 20 (2–120) 11 9 <1 (<1 - 6.00) 

Garfield Quaternary -- <14 (<14–2,400) 6 17 <10 (<10–876) 6 33 1.61 (<1–3.00) 

Tertiary Wasatch 9.2 (3.0–92) 20 0 2.1 (<0.2–220) 21 10 -- (--) 

Mesa Quaternary -- <60 (<60–7,206) 13 23 1,410 (<10–7,243) 12 92 1.50 (<1–8.00) 

Cretaceous Mancos <10 (<10–780) 8 25 195 (30–860) 8 75 6.43 (5.63–7.23) 

Rio Blanco Quaternary -- 70 (<10–49,000) 28 7 45 (8–530) 28 39 5.00 (<1–66) 

Tertiary Green River 80 (9 –2,400) 29 14 <10 (<10–100) 31 6 4.00 (<1–150) 

County Geologic unit Aquifer Barium Selenium 

Median concentration (range), μg/L n Percent exceedances (MCL=2,000 μg/L) Median concentration n (range), μg/L Percent exceed- ances (MCL=50 μg/L) Median concentrat

(range), mg/L 

Delta Quaternary -- 36 (--) 1 0 7.50 (1.30–32.0) 14 0 -- (--) 

Cretaceous Mesaverde 90 (50–2,100) 11 9 18.0 (<1–238) 16 19 -- (--) 

Garfield Quaternary -- <100 (<100) 6 0 2.00 (<1–160) 6 17 -- (--) 

Tertiary Wasatch -- (--) 0 -- 13.6 (5.50–21.6) 2 0 <0.0005 (<0.000–3

Mesa Quaternary -- <100 (<100) 4 0 2.72 (<1–280) 31 10 -- (--) 

Cretaceous Mancos -- (--) 0 -- 9.00 (<5–1,000) 11 27 -- (--) 

Rio Blanco Quaternary -- 36 (15–56) 3 0 4.00 (<1–9.00) 27 0 -- (--) 

Tertiary Green River <200 (<200–800) 10 0 <1 (<1–7.00) 20 0 -- (--) 

Table 8. Concentrations of selected water-quality constituents, by county, geologic unit, and aquifer. The majority of samples discussed in this re

for geologic unit or aquifer.—Continued

[mg/L, milligrams per liter; μg/L, micrograms per liter; MCL, maximum containment level; SMCL, secondary maximum containment level; --, not applicable; ≥ less than or 
Table 8. Concentrations of selected water-quality constituents, by county, geologic unit, and aquifer. The majority of samples discussed in this for geologic unit or aquifer.—Continued

[mg/L, milligrams per liter; μg/L, micrograms per liter; MCL, maximum containment level; SMCL, secondary maximum containment level; --, not applicable; ≥ less than 

County Geologic unit Aquifer

Benzene Toluene

Median concentration (range), μg/L n Percent exceedances (MCL=5 μg/L) Median concentration (range), μg/L n Percent exceedances (MCL=1,000 μg/L)

Delta Quaternary -- -- (--) 0 -- -- (--) 0 --

Cretaceous Mesaverde -- (--) 0 -- -- (--) 0 --

Garfield Quaternary -- -- (--) 0 -- -- (--) 0 --

Tertiary Wasatch <1 (<1) 8 0 <5 (<5) 8 0

Mesa Quaternary -- -- (--) 0 -- -- (--) 0 --

Cretaceous Mancos -- (--) 0 -- -- (--) 0 --

Rio Blanco Quaternary -- -- (--) 0 -- -- (--) 0 --

Tertiary Green River -- (--) 0 -- -- (--) 0 --
Figure 8. Concentrations of dissolved solids in groundwater from wells in the Piceance Basin, western Colorado. [≥, greater than or equal 

Base from U.S. Geological Survey 1:100,000-scale digital dataUniversal Transverse Mercator projection, Zone 13

100 20 MILES

0 10 20 KILOMETERS

20 4 MILES

0 2 4 KILOMETERS

Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

S

G D 

COLORADO

UTAH

40°

39°

109° 108° 107°

Grand

Junction

Montrose

MESA

COUNTY DELTA

COUNTY

MONTROSE

COUNTY

GUNNISON

COUNTY

PITKIN

COUNTY

GARFIELD

COUNTY

GARFIELD

COUNTY RIO BLANCO

COUNTY

MOFFATCOUNTY ROUTT

COUNTY

OURAY

COUNTY

Rifle Meeker Rangely

INSET MAP

INSET MAP
Overview of Groundwater Quality in the Piceance Basin 25

Figure 9. Trilinear diagram of major-ion chemistry of groundwater by (A) dissolved solids, 

and (B) geologic unit of aquifer in which well is screened, Piceance Basin, western Colorado. 

Dissolved solids, in milligrams

 per liter

139–500

501–1,000

1,001–7,000

7,001–66,630

EXPLANATION

Age of geologic unit of aquifer in

 which well is screened

Quaternary

Tertiary

Cretaceous

Unknown

EXPLANATION

100

100

80

60

40

20

0

80

60

40

20

0

0

100

80

60

40

20

0

20

40

60

80

100

100

100

20

40

60

80

0

80

60

40

20

0

100

80

60

40

20

0

0

20

40

60

80

100

Sulfate plus Chloride

Magnesium

PERCENT

Carbonate plue Bicarbonate 

Sulfate plus Magnesium

Sulfate

PERCENT

Sodium

100 100

80

60

40

20

0

80

60

40

20

0

Chloride

PERCENT

Calcium

100

100

80

60

40

20

0

80

60

40

20

0

0

100

80

60

40

20

0

20

40

60

80

100

100

100

20

40

60

80

0

80

60

40

20

0

100

80

60

40

20

0

0

20

40

60

80

100

Sulfate plus Chloride

Magnesium

PERCENT

Carbonate plue Bicarbonate 

Sulfate plus Magnesium

Sulfate

PERCENT

Sodium

100 100

80

60

40

20

0

80

60

40

20

0

Chloride

PERCENT

Calcium

A

B
26 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

The property pH is a measure of the hydrogen ion activity 

in water and, like water temperature, is often collected as part 

of a water-quality-sampling program because it provides the 

most basic understanding of water quality. Values of pH less 

than 7 are generally referred to as acidic; those greater than 

7 are generally referred to as basic. The normal range of pH 

in natural waters is between 6.5 and 8.5 (Hem, 1989). Values 

of pH less than 6.5 or greater than 8.5 exceed the secondary 

standard. Of pH values collected between 1958 and 2009 for 

1,441 wells, only 15 values (1 percent) were less than 6.5 

(acidic) and 95 values (6.6 percent) were greater than 8.5 

(basic) (table 7). The median value was 7.6 standard units. 

Several of the pH values greater than 8.5 were measured 

in samples from wells completed in Quaternary deposits in 

Rio Blanco County, but the majority of the samples with pH 

greater than 8.5 were from unknown geologic units (fig. 11). 

Chloride is a conservative constituent—it is not likely 

to be participate in geochemical processes or be precipitated 

once mobilized (Hem, 1989). Chloride concentrations, measured between 1951 and 2009, were available for 1,203 wells, 

and 123 concentrations (10 percent) exceeded the secondary 

standard of 250 mg/L (table 7). Like DS exceedances, chloride 

exceedances were relatively widespread in the study area 

(fig. 12). Concentrations ranged from less than detection to 

18,000 mg/L, with a median concentration of 22.2 mg/L 

(table 7). The highest chloride concentration was found in a 

sample from an observation well screened in the Pennsylvanian and Permian Weber Sandstone in Rio Blanco County 

(appendix 1). Several of the samples had geologic unit or 

aquifer designations. Of those samples, only samples from 

Quaternary units in Mesa County had a median chloride 

concentration greater than the secondary standard (table 8). 

Overall, 85 chloride concentrations (7 percent) were greater 

than 355 mg/L, a concentration above which agricultural 

use should be severely restricted, specifically with respect 

to irrigation (Ayers and Westcot, 1985). These samples were 

collected in Garfield, Rio Blanco, and Mesa Counties (fig. 

12). Eight chloride concentrations (less than 1 percent) were 

greater than 4,000 mg/L, similar to some brines (Hem, 1989), 

Figure 10. Trilinear diagram of majorion chemistry of produced waters 

from Mesaverde Group and Wasatch 

Formation, Piceance Basin, western 

Colorado. Produced-water-quality 

samples submitted to the Piceance 

Basin common data repository by 

Colorado Oil and Gas Conservation 

Commission, 2010.

EXPLANATION

Produced water-quality samples from Colorado

 Oil and Gas Conservation Commission, 2008—

 Data from submission to common data repository

 from Colorado Oil and Gas Conservation Commssion 

Wasatch Formation

Mesaverde Group

0

20

40

60

80

100

0

20

40

60

80

100

Carbonate plue Bicarbonate 

100

80

60

40

20

0

100

80

60

40

20

0

Sodium

100

80

60

40

20

0

Sulfate plus Chloride

Magnesium

PERCENT

100

80

60

40

20

0

100

80

60

40

20

0

Sulfate plus Magnesium

Sulfate

PERCENT

100

80

60

40

20

0

100

80

60

40

20

0

100

20

40

60

80

0

Chloride

PERCENT

Calcium
Figure 11. Values of pH in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; >, greater than] Cretaceous Mesaverde Group rock 

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILES 0 2 4 KILOMETERS Geology from Green (1992) Quaternary deposit Geologic unit EXPLANATION Tertiary volcanic rock Tertiary sedimentary rock Cretaceous sedimentary rock Triassic sedimentary rock Jurassic sedimentary rock Pennsylvanian sedimentary rock 

COLORADO

UTAH

40°39°

109° 108° 107°

Grand

Junction

Montrose

MESA

COUNTY

DELTA

COUNTY

MONTROSE

COUNTY

GUNNISON

COUNTY

PITKIN

COUNTY

GARFIELD

COUNTY

GARFIELD

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Figure 12. Concentrations of chloride in groundwater from wells in the Piceance Basin, western Colorado. [<, less than]

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Quaternary deposit

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EXPLANATION

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Overview of Groundwater Quality in the Piceance Basin 29

and these samples were primarily collected in Rio Blanco 

County (appendix 1). 

Sulfate concentrations measured between 1951 and 

2009 were available for 1,226 wells and 460 concentrations 

(37 percent) exceeded the secondary standard of 250 mg/L 

(table 7). Like DS and chloride exceedances, sulfate exceedances were relatively widespread in the study area (fig. 13). 

Concentrations ranged from below detection (commonly less 

than 5 mg/L) to 18,000 mg/L, with a median concentration 

of 155 mg/L (table 7). The highest sulfate concentration was 

found in a sample from an observation well in Garfield County 

(geologic unit in which it was screened was not reported) 

(appendix 1). Of the several samples that did have geologic 

unit or aquifer designations, most had median sulfate concentrations higher than the standard (table 8). These data indicated 

that subsurface sulfate sources were relatively common in 

the study area. In the absence of additional information, such 

as stable sulfur-isotope data, it is difficult to identify those 

sources. Likely sources include minerals such as gypsum and 

pyrite (following oxidation). Produced waters are less likely 

to contribute sulfate to the freshwater aquifers because sulfate 

concentrations in those waters typically are low (URS Corporation, 2006). Produced waters from the Mesaverde Group in 

Garfield County, for example, generally contained less than 

10 mg/L sulfate (S.S. Papadopulos & Associates, Inc., 2008). 

On the basis of the nonparametric Wilcoxon rank-sum test, 

sulfate concentrations were significantly higher (p <0.001) in 

anoxic groundwater than oxic groundwater (table 9) (Helsel 

and Hirsch, 2002). This result is opposite the result expected 

on the basis of the redox chemistry of sulfate (McMahon and 

Chapelle, 2008). The reason for this outcome is unclear, but 

it could indicate a relative abundance of sulfate sources in the 

aquifers compared with electron donors, such as organic 

carbon, to support sulfate reduction under anoxic conditions. 

Fluoride has a low solubility and, in natural waters, 

is typically found at concentrations less than 1 mg/L 

(Hem, 1989). Fluoride concentrations, measured from 1958 

to 2009, were available for 1,138 wells, and 96 concentrations (8.4 percent) exceeded the primary standard of 4 mg/L 

(table 7). Most of these exceedances were in samples from 

Rio Blanco County (fig. 14). Additionally, fluoride concentrations commonly exceeded the primary standard in the Mamm 

Creek–Divide Creek area of Garfield County (URS Corporation, 2006). Fluoride concentrations ranged from less than 

detection (commonly less than 0.5 mg/L) to 95 mg/L, with 

median fluoride concentration of 0.64 mg/L. A sample from 

an observation well in Rio Blanco County had the highest 

fluoride concentration (geologic unit in which it was screened 

not reported) (appendix 1). Of samples for which the geologic 

unit or aquifer was designated, only the Green River Formation in Rio Blanco County had 10 or more fluoride values 

and a median fluoride concentration greater than the primary 

standard (table 8). 

Trace Elements

Trace element data for arsenic, barium, manganese, iron, 

and selenium in groundwater were included in this report. 

These trace elements are typically derived from minerals in 

the aquifer rocks and sediment (Hem, 1989). Arsenic concentrations, measured between 1971 and 2008, were available for 

256 wells and 33 concentrations (13 percent) exceeded the 

primary standard of 10 micrograms per liter (μg/L) (table 7). 

Most of these exceedances were in samples from Rio Blanco 

County (fig. 15). Arsenic concentrations ranged from less than 

detection (most commonly less than 1 μg/L) to 1,100 μg/L, 

with a median concentration of 1 μg/L (table 7). A sample 

from an observation well in Garfield County had the highest 

arsenic concentration (geologic unit in which it was screened 

was not reported) (appendix 1). Quaternary and Tertiary units 

in Rio Blanco County had the highest median arsenic concentrations (5 and 4 μg/L, respectively) of those units with at least 

10 assigned samples (table 8). Arsenic concentrations were 

significantly (p=0.008) larger in anoxic groundwater than in 

oxic groundwater (table 9), indicating that reductive dissolution of manganese and/or iron oxide minerals in the aquifer 

rock and sediment probably was an important mechanism for 

producing elevated arsenic concentrations in groundwater 

(Smedley and Kinniburgh, 2002). In fact, iron concentrations 

were significantly higher (p=0.001) in samples with arsenic 

concentrations above the primary standard of 10 μg/L than 

in samples with lower arsenic concentrations. There was no 

significant difference in manganese concentrations between 

samples with arsenic concentrations higher and lower than the 

standard. The arsenic-DO relation also implies that DO measurements indicating anoxic conditions could be a useful guide 

to groundwater vulnerability to arsenic enrichment. 

Barium concentrations measured between 1968 and 

2009 were available for 193 wells, and 8 concentrations 

(4.1 percent) exceeded the primary standard of 2,000 μg/L 

(table 7). Samples with barium exceedances were collected in 

Delta, Garfield, and Rio Blanco Counties (fig. 16). Concentrations ranged from less than detection to 5,300 μg/L, with 

a median concentration of 90 μg/L. A sample from an 

observation well in Rio Blanco County had the highest 

barium concentration (geologic unit in which it was screened 

was not reported) (appendix 1). The Mesaverde Group in 

Delta County had the highest quantifiable median barium concentrations (90 μg/L) of those units with at least 10 assigned 

samples (table 8). 

Manganese concentrations measured between 1968 and 

2009 were available for 681 wells, and 140 concentrations 
Figure 13. Concentrations of sulfate in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or 

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Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

COLORADO

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Table 9. Concentrations of selected water-quality constituents relative to three dissolved-oxygen concentration thresholds. [Reported concentratiocommon assessment levels set to zero. P-values determined from the nonparametric Wilcoxon rank-sum test (Helsel and Hirsch, 2002]

[mg/L, milligrams per liter; μg/L , micrograms per liter; <, less than; ≥, greater than or equal to;]

Constituent Concentration units Common assessment concentration Average concentration (number of samples) O2 concentration (mg/L) O2 concentration (mg/L) O

<0.5 ≥0.5 p-value <1.0 ≥1.0 p-value <2.0 

Nitrate mg/L as N 0.29 0.87 (35) 0.93 (547) 0.459 0.84 (85) 0.95 (497) 0.183 0.91 (18

Sulfate mg/L 2.5 1,320 (43) 551 (623) <0.001 1,080 (102) 514 (564) <0.001 821 (211) 

Manganese μg/L 5 580 (31) 151 (267) 0.001 366 (66) 148 (232) <0.001 300 (100) 

Iron μg/L 70 315 (31) 749 (291) 0.486 354 (68) 801 (254) 0.856 348 (108) 

Methane mg/L 0.01 1.86 (31) 0.54 (605) 0.004 1.78 (80) 0.43 (556) <0.001 1.47 (18

Arsenic μg/L 3 4.57 (7) 0.40 (45) 0.008 4.00 (7) 0.41 (45) 0.018 2.12 (17

Selenium μg/L 20 80 (25) 35 (271) 0.043 51 (60) 35 (236) 0.120 59 (99) 
Figure 14. Concentrations of fluoride in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or 

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Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

COLORADO

UTAH

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Figure 15. Concentrations of arsenic in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or 

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILES 0 2 4 KILOMETERS Geology from Green (1992) Quaternary deposit Geologic unit EXPLANATION Tertiary volcanic rock Tertiary sedimentary rock Cretaceous Mesaverde Group rock Cretaceous sedimentary rock Triassic sedimentary rock Jurassic sedimentary rock Pennsylvanian sedimentary rock

COLORADO

UTAH

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COUNTY DELTA

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Figure 16. Concentrations of barium in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or 

Base from U.S. Geological Survey 1:100,000-scale digital dataUniversal Transverse Mercator projection, Zone 13

100 20 MILES

0 10 20 KILOMETERS

20 4 MILES

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Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

COLORADO

UTAH

40°39°

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Junction

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Figure 17. Concentrations of manganese in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than o

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILES 0 2 4 KILOMETERS Geology from Green (1992) Quaternary deposit Geologic unit EXPLANATION Tertiary volcanic rock Tertiary sedimentary rock Cretaceous Mesaverde Group rock Cretaceous sedimentary rock Triassic sedimentary rock Jurassic sedimentary rock Pennsylvanian sedimentary rock

COLORADO

UTAH

40°39°

109° 108° 107°

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Junction

Montrose

MESA

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Study 

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36 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

(21 percent) exceeded the secondary standard of 50 μg/L 

(table 7). Exceedances of the secondary standard were 

relatively widespread in the study area (fig. 17). Manganese 

concentrations ranged from below detection (most commonly 

5 μg/L) to 8,900 μg/L, with a median of 6 μg/L (table 7). A 

sample from a domestic well in Garfield County had the highest manganese concentration (geologic unit in which well was 

screened was not reported) (appendix 1). Quaternary deposits 

in Mesa County had the highest median manganese concentration (1,410 μg/L) of those units with at least 10 assigned 

samples (table 8). Like arsenic, manganese concentrations 

were significantly higher (p=0.001) in anoxic groundwater 

than in oxic groundwater (table 9), which indicates that DO 

measurements also could be a useful indicator of groundwater 

vulnerability to manganese enrichment. 

Iron is the second most abundant metallic element in the 

earth’s crust; however, concentrations in water are generally 

small (Hem, 1989). Iron concentrations measured between 

1968 and 2009 were available for 589 wells, and 96 concentrations (16 percent) exceeded the secondary standard of 

300 μg/L (table 7). Most of the concentrations that exceeded 

the standard were from Garfield and Rio Blanco Counties 

(fig. 18). Iron concentrations ranged from less than detection 

(most commonly 70 μg/L) to 110,000 μg/L, with a median of 

40 μg/L (table 7). A sample from a domestic well in Garfield 

County had the highest iron concentration (geologic unit in 

which well was screened was not reported) (appendix 1). The 

Mesaverde Group in Delta County had the highest median 

iron concentration (150 μg/L) of those units with at least 

10 assigned samples (table 8). Unlike arsenic and manganese, 

iron concentrations were not significantly different between 

oxic and anoxic water samples, nor were they different at 

DO-concentration thresholds of 1 and 2 mg/L (table 9). Iron 

concentrations typically would be expected to be higher in 

anoxic groundwater than oxic groundwater based on its redox 

chemistry (McMahon and Chapelle, 2008). The reason for this 

apparent discordant finding is unclear, but it could be related 

to sample collection and preservation techniques used. If the 

sample had been preserved with acid in the field at the time 

it was collected but filtered later in the laboratory, it is possible that the acid could have dissolved particulate iron in the 

sample. Ideally, trace element samples would be first filtered 

and then acidified in the field immediately after sample 

collection. For example, in a set of 6,906 groundwater samples 

collected from around the country by the U.S. Geological 

Survey National Water-Quality Assessment Program, median 

iron concentrations were significantly (p <0.001) higher in 

anoxic groundwater than in oxic groundwater (220 μg/L 

and less than 10 μg/L, respectively) (P.B. McMahon, 

U.S. Geological Survey, written commun., 2011). Those 

samples were filtered and acidified in the field immediately 

after collection. 

Selenium is a trace element that occurs naturally in the 

environment. The processes that control selenium mobilization are strongly controlled by the geochemical environment. 

Selenium concentrations measured between 1972 and 2008 

were available for 551 wells, and 51 concentrations (9 percent) 

exceeded the primary standard of 50 μg/L (table 7). Most of 

the concentrations that exceeded the selenium standard were 

from Garfield County (fig. 19). Selenium concentrations 

ranged from less than detection (most commonly 20 μg/L) 

to 1,640 μg/L, with a median of 5 μg/L (table 7). A sample 

from a domestic well in Garfield County had the highest 

selenium concentration (geologic unit in which the well was 

screened was not reported) (appendix 1). The Mesaverde 

Group in Delta County had the highest median selenium 

concentration (18 μg/L) of those units with at least 10 assigned 

samples (table 8). 

Natural sources of selenium in the study area include 

authigenic pyrite in Mancos Shale, particularly in Mesa and 

Delta Counties, and other selenium-bearing solid phases 

that have been deposited in the aquifer or redistributed by 

geochemical processes within the groundwater environment 

(Wright and Butler, 1993). Percolation of irrigation water 

through selenium-bearing geologic units such as the Mancos 

Shale has the potential to oxidize and mobilize selenium. This 

study found that selenium concentrations were significantly 

higher (p< 0.001) in samples containing nitrate at a concentration of at least 1 mg/L (as nitrogen) than in samples with 

lower nitrate concentrations. Mean selenium concentrations 

in the high- and low-nitrate samples were 85 and 7 μg/L, 

respectively (most common censoring level for nitrate and 

selenium of 0.29 mg/L and 20 μg/L, respectively). The nitrate 

concentration of 1 mg/L (as nitrogen) is a proposed national 

baseline concentration in groundwater (Dubrovsky and others, 

2010), and nitrate concentrations above that level could indicate inputs from human sources such as irrigated agriculture 

or septic leachate. Stratified by DO concentrations, selenium 

concentrations were significantly higher (p=0.043) in anoxic 

groundwater than in oxic groundwater (table 9). This result is 

opposite of the result expected based on the redox chemistry 

of selenium and may reflect the diversity of geologic units 

from which samples were collected, however, further sampling would need to be conducted. Analyses of DO-selenium 

relations in more uniform geologic settings such as the Central 

Valley of California have shown that selenium concentrations 

typically are highest in oxic groundwater (Dubrovsky and 

others, 1993).

Nitrate

Excessive nitrate in drinking water supplies is a human 

health concern especially for small children because it may 

cause methemoglobinemia (“blue baby” syndrome). Elevated 

sources of nitrate in groundwater are likely to be associated 

with septic systems, animal manure, or fertilizers applied to 

lawns and crops (Hem, 1989). Concentrations of nitrite in 

most of the samples were less than the reporting level; therefore, concentrations of nitrite plus nitrate consisted almost 

entirely of nitrate and are referred to as such in this report 

(appendix 1). Nitrate concentrations measured between 1958 
Figure 18. Concentrations of iron in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or equa

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILES 0 2 4 KILOMETERS Geology from Green (1992) Quaternary deposit Geologic unit EXPLANATION Tertiary volcanic rock Tertiary sedimentary rock Cretaceous Mesaverde Group rock Cretaceous sedimentary rock Triassic sedimentary rock Jurassic sedimentary rock Pennsylvanian sedimentary rock

COLORADO

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Figure 19. Concentrations of selenium in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or eq

Base from U.S. Geological Survey 1:100,000-scale digital dataUniversal Transverse Mercator projection, Zone 13

100 20 MILES

0 10 20 KILOMETERS

20 4 MILES

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Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

COLORADO

UTAH

40°39°

109° 108° 107°

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Junction

Montrose

MESA

COUNTY DELTA

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Figure 20. Concentrations of nitrate in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or 

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILE

0 2 4 KILOMETERS Land cover from Colorado Decision Support System (2010) Agricultural Land cover EXPLANATION Barren Forest Tundra Rangeland Urban or built-up Water Wetland

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Study ar

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TertiaryCretaceUnknow1 to 10Greater Less tha

Mamm Cre
40 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

and 2009 were available for 791 wells, and 13 concentrations 

(1.6 percent) exceeded the primary standard of 10 mg/L as 

nitrogen (table 7). Most of these exceedances were in samples 

collected from agricultural areas of Garfield County (fig. 20). 

Nitrate concentrations ranged from less than detection (most 

commonly about 0.29 mg/L as nitrogen) to 29.4 mg/L, with 

a median concentration less than 0.21 mg/L as nitrogen 

(table 7). A domestic well in Garfield County had the highest nitrate concentration (geologic unit in which well was 

screened was not reported) (appendix 1). The Wasatch Formation in Garfield County was the only geologic unit to have 

at least 10 assigned samples (table 8), and the median nitrate 

concentration for those samples was 0.4 mg/L as nitrogen. 

McMahon and others (2010) sampled 26 domestic wells 

completed in the Wasatch Formation in Garfield County and 

found that nitrate concentrations in oxic groundwater were 

significantly higher (p=0.03) than concentrations in anoxic 

groundwater. This same relation was observed in a national 

study of nitrate in groundwater (McMahon and Chapelle, 

2008). This relation between DO and nitrate was not observed 

in this study, although nitrate concentrations were significantly 

higher (p=0.015) in groundwater containing at least 

2 mg/L DO than in less oxygenated groundwater (table 9). 

The apparent similarity in nitrate concentrations in oxic and 

anoxic groundwater may reflect the generally low concentrations of nitrate in the dataset (median nitrate concentration less 

than 0.21 mg/L as nitrogen); however, further data collection 

is needed to verify this hypothesis. Although this DO-nitrate 

relation differs somewhat from the relation described in previous studies, it still indicates that DO measurements could 

be a useful indicator of groundwater vulnerability to nitrate 

contamination.

Benzene, Toluene, Ethylbenzene, Xylene

Benzene, toluene, ethylbenzene, and xylene (BTEX) 

are volatile organic compounds typically found in petroleum 

products such as gasoline and diesel fuel, but these compounds 

also occur in some natural gas reservoirs. Benzene concentrations measured between 1989 and 2008 were available for 

808 wells, but benzene was detected in only 11 wells 

(1.4 percent); 5 concentrations (0.6 percent) exceeded the 

primary standard of 5 μg/L (table7). These exceedances were 

in samples from wells located in Garfield (3 samples) and Rio 

Blanco (2 samples) Counties (geologic unit in which the wells 

were screened not reported) (fig. 21, appendix 1). Toluene 

concentrations measured between 1997 and 2008 were 

available for 808 wells. Toluene was detected in 38 wells 

(4.7 percent), but none of the concentrations exceeded the 

primary drinking-water standard (1,000 μg/L) (table 7, 

fig. 22). Ethylbenzene and xylene were sampled at a frequency 

similar to that of benzene and toluene, but detections were few 

and without exceedances of primary standards (table 7). 

Methane

Methane is a combustible gas that can accumulate to 

explosive levels in well bores and confined spaces in buildings. 

Methane can be either thermogenic or biogenic in origin. 

Thermogenic methane is generally produced at depths far 

below freshwater aquifers, and its presence in water wells can 

be due to natural conditions, such as migration of gas along 

naturally occurring fracture zones from underlying gas-bearing 

reservoirs such as the Mesaverde Group or the Wasatch 

Formation, or from oil and gas drilling, completion, and 

production activities. Biogenic methane, which is produced 

through microbial degradation of organic matter (Whiticar, 

1999), generally originates from much shallower depths than 

thermogenic methane and can occur naturally in shallow 

anoxic groundwater systems. Methane concentrations measured between 1997 and 2009 were available for 874 wells, in 

which methane was detected in 207 wells (24 percent) 

(table 7). Most samples that contained detectable methane 

concentrations were from Garfield County (fig. 23). Methane 

concentrations in the study area ranged from less than the 

detection limit (commonly 0.0008 mg/L) to 36.7 mg/L, and 

75 values (8.5 percent) were greater than 1 mg/L (high 

methane). Most methane detections and methane concentrations greater than 1 mg/L were found in Garfield County in 

the Mamm Creek–Divide Creek area (fig. 23). A sample from 

a domestic well in Garfield County had the highest methane 

concentration (geologic unit in which well was screened was 

not reported) (appendix 1). The Wasatch Formation in Garfield 

County was the only one to have at least 10 assigned samples 

(table 8), and the median methane concentration for those 

samples was less than 0.0005 mg/L. Methane concentrations 

in anoxic groundwater were significantly higher (p=0.004) 

than the concentrations in oxic groundwater, which is consistent with previous results from the study area (McMahon and 

others, 2010). These findings indicate that dissolved-oxygen 

measurements could be a useful indicator of groundwater 

vulnerability to methane enrichment.

Several studies have used methane isotopic compositions (ratio of 13C to 12C relative to a standard material) to 

determine the origin (biogenic or thermogenic) of methane 

in groundwater (Whiticar, 1999; URS Corporation, 2006; 

S.S. Papadopoulos & Associates, Inc., 2008; McMahon and 

others, 2010). Only about 30 percent of the samples with high 

methane concentrations (greater than or equal to 1 mg/L) had 

isotopic data for methane (appendix 1). Overall, 37 samples 

had isotopic data for methane, and all but one sample came 

from domestic or observation wells located in Garfield County 

(appendix 1). The isotopic data indicate that methane in the 

Garfield County water wells was from both biogenic and 

thermogenic sources (fig. 24) (appendix 1). 

For comparison, natural gas from the Mesaverde Group 

in Garfield County was exclusively thermogenic in origin 

(fig. 24). Thermogenic methane in domestic wells is likely 

to have come from much deeper sources than the freshwater 

aquifer in which the water wells were screened, although the 
Figure 21. Concentrations of benzene in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than or 

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILES 0 2 4 KILOMETERS Geology from Green (1992) Quaternary deposit Geologic unit EXPLANATION Tertiary volcanic rock Tertiary sedimentary rock Cretaceous Mesaverde Group rock Cretaceous sedimentary rock Triassic sedimentary rock Jurassic sedimentary rock Pennsylvanian sedimentary rock

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TCUG GL
Figure 22. Detections of toluene in groundwater from wells in the Piceance Basin, western Colorado.

Base from U.S. Geological Survey 1:100,000-scale digital dataUniversal Transverse Mercator projection, Zone 13

100 20 MILES

0 10 20 KILOMETERS

20 4 MILES

0 2 4 KILOMETERS

Geology from Green (1992)

Quaternary deposit

Geologic unit

EXPLANATION

Tertiary volcanic rockTertiary sedimentary rockCretaceous Mesaverde Group rockCretaceous sedimentary rockTriassic sedimentary rockJurassic sedimentary rockPennsylvanian sedimentary rock

COLORADO

UTAH

40°39°

109° 108° 107°

Grand

Junction

Montrose

MESA

COUNTY DELTA

COUNTY

MONTROSE

COUNTY

GUNNISON

COUNTY

PITKIN

COUNTY

GARFIELD

COUNTY

GARFIELD

RIO BLANCO COUNTY

COUNTY

MOFFATCOUNTY ROUTT

COUNTY

OURAY

COUNTY

Meeker Rifle

Rangely

INSET MAP

INSET MAP

S

G T
Figure 23. Concentrations of methane in groundwater from wells in the Piceance Basin, western Colorado. [<, less than; ≥, greater than 

Base from U.S. Geological Survey 1:100,000-scale digital data Universal Transverse Mercator projection, Zone 13 100 20 MILES 0 10 20 KILOMETERS 20 4 MILES 0 2 4 KILOMETERS Geology from Green (1992) Quaternary deposit Geologic unit EXPLANATION Tertiary volcanic rock Tertiary sedimentary rock Cretaceous Mesaverde Group rock Cretaceous sedimentary rock Triassic sedimentary rock Jurassic sedimentary rock Pennsylvanian sedimentary rock

COLORADO

UTAH

40°39°

109° 108° 107°

Grand

Junction

Montrose

MESA

COUNTY DELTA

COUNTY

MONTROSE

COUNTY

GUNNISON

COUNTY

PITKIN

COUNTY

GARFIELD

COUNTY

GARFIELD

RIO BLANCO COUNTY

COUNTY

MOFFATCOUNTY ROUTT

COUNTY

OURAY

COUNTY

Meeker Rifle

Rangely

INSET MAP

INSET MAP

S

G M
44 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Figure 24. Stable hydrogen and carbon isotope compositions of methane in water wells in the Piceance 

Basin, for water samples with at least 1 mg/L of methane. The isotopic composition of methane in natural 

gas from the Mesaverde Group in Garfield Country (Colorado Oil and Gas Conservation Commission, 

2010) is shown for comparison (data from submission to common data repository by Colorado Oil and Gas 

Conservation Commission). The fields for bacterial and thermogenic methane are modified from Whiticar 

and others, 1986. 

–110

Carbon-13/Carbon-12 ratio in methane, water, filtered, per mil relative to

Vienna PeeDee Belemnite

Deuterium/protium ratio in methane, water, filtered, per mil relative to Vienna Standard Mean Ocean Water

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

–400 –350 –300 –250 –200 –150 –100

Biogenic

Transition and mix

Thermogenic

228 69

226

300

301

282

364 187

256

110 109

311

365

2077

102 182

276 104

189

216

89

113

325

164

Water-quality data from repository—Methane concentration

 greater than or equal to 1 milligram per liter

Report number

Produced water—Mesaverde group (S.S. Papadopulos and

 Associates, Inc., 2008)

EXPLANATION

316
Overview of Groundwater Quality in the Piceance Basin 45

geologic unit in which they were screened was not provided 

by the data source (appendix 1). In contrast, biogenic 

methane in the domestic wells could have been produced 

locally in an aquifer with anoxic groundwater, or it could 

have come from deeper geologic units underlying the aquifer 

(but not as deep as the zones of thermogenic methane). In a 

domestic well completed in the shallow Wasatch Formation in 

Garfield County, helium-4 concentration data have been used 

to show that biogenic methane was most likely produced in a 

deeper part of the Wasatch Formation and subsequently transported to shallower depths (McMahon and others, 2010). 

The methane transport mechanism was not identified, but 

possible mechanisms included transport along natural fractures 

or movement up the uncemented annular space of gas wells. 

Limitations of the Common Data Repository 

for Assessing Groundwater Quality and 

Opportunities for Future Monitoring

More than 480 groundwater-quality constituents exist 

in the common data repository, but only a subset of these 

has been discussed in this report. Assessing such a large and 

diverse dataset as the one available through the repository 

poses unique challenges for assessing groundwater quality 

in the study area. The repository contains data from several 

studies that differed widely in purpose and scope. Garfield 

County is the site of several groundwater studies, which have 

produced a wealth of information. However, much of the data 

collection was focused on the effects of energy development 

on water quality in the Mamm Creek–Divide Creek area. The 

majority of groundwater-quality data collected in Rio Blanco 

County is from the 1970s and 1980s and focused on understanding water bearing units of the Green River Formation in 

relation to oil shale development. Groundwater-quality data in 

Mesa and Delta Counties are from several small studies and 

provides a limited understanding of groundwater resources for 

those counties. 

Data gaps exist in the repository. Groundwater-quality 

data in the repository were not evenly distributed throughout 

the study area. For example, the repository contained very 

little data for some parts of the study area that have many oil 

or gas wells, such as western Garfield, Mesa, and Rio Blanco 

Counties (fig. 25). Moffat and Montrose Counties contained 

relatively small amounts of data compared with Garfield 

and Rio Blanco Counties. Furthermore, the repository did not 

contain data for many of the water-supply wells (domestic, 

municipal) in the study area (fig. 26). Delta County, for 

example, is somewhat underrepresented with respect to 

groundwater-quality data even though there were many 

domestic wells in the county (fig. 26). 

Several key water-quality constituents or indicators were 

underrepresented in the repository. Dissolved-oxygen data, 

for example, were available for only 47 percent of samples 

even though DO measurements were shown to be useful for 

assessing the vulnerability of the aquifer to enrichment by or 

contamination from constituents such as arsenic, manganese, 

methane, and nitrate. Arsenic and nitrate, in particular, are of 

concern from a human health standpoint, but they have been 

measured in fewer than 17 and 51 percent of the samples, 

respectively. Stable isotopic values of water and methane 

were available for fewer than 5 percent of the samples even 

though those data were shown to be useful tracers of water and 

methane sources, respectively. Other useful tracers that are 

either underrepresented or absent from the repository include 

age tracers such as tritium and carbon-14 and gas tracers such 

as helium-4, the combination of which can be used to examine 

sources of water and chemicals in aquifers. 

Ancillary information, such as well depth, depth to water, 

and the geologic unit or aquifer in which a well was completed, was missing for more than 50 percent of the 

samples. This information is crucial for placing the well and 

its water chemistry in hydrologic context. The majority of 

wells with completion information were in Quaternary 

deposits. Quaternary deposits were important sources of 

groundwater in the study area where population centers were 

located in river valleys. But many rural household wells are 

also completed in bedrock aquifers below the Quaternary 

deposits, and the distribution of wells in the repository in each 

of those units is not well understood.

One additional aspect of the repository worth noting is 

the general lack of chemical and isotopic data for produced 

waters and for other groundwater at depth below the freshwater aquifers. Extensive faulting and fracturing in the study 

area, as well as drilling for natural gas, provides potential 

conduits for deep groundwater to move upward into freshwater aquifers. Without adequate chemical and isotopic 

characterization of that deep water, it can be difficult to 

recognize its presence in shallow aquifers or, if it is identified, 

to know from which deep geologic unit it originated.

Future monitoring could avoid several limitations of 

the current repository by making relatively minor changes to 

sample-collection and data-reporting protocols. 

• Add field measurements for dissolved oxygen to 

sampling protocols

• Filter cation and trace element samples in the field 

prior to acidification 

• Measure the water level in a well prior to sampling 

• Report information on well construction and the 

geologic unit or aquifer in which a well is completed as part of the water-quality database 

Implementation of these types of changes would increase the 

comparability of data from different monitoring programs and 

also add value to each program individually and to that of the 

regional dataset as a whole. 

Other changes to monitoring programs could require 

greater resources. When possible, such changes might include 

sampling for a basic set of constituents that is relevant to 
46 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Rangely

MESA

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

COLORADO

UTAH

GUNNISON

COUNTY

MONTROSE

COUNTY

MOFFAT

COUNTY

DELTA

COUNTY

ROUTT

COUNTY

PITKIN

COUNTY

Rifle

Meeker

Montrose

109° 108° 107°

40°

39°

Base from U.S. Geological Survey 1:100,000-scale digital data

Universal Transverse Mercator projection, Zone 13

EXPLANATION

0 10 20 MILES

0 10 20 KILOMETERS

Study area boundary

Colorado Oil and Gas Conservation 

 Commission oil and gas well

Gunnison River

Un compahgre River

Gunnison River

Plateau Creek

East Salt Creek

Parachute Creek

Yellow

Creek

Douglas Creek

White Riv er

Piceance Creek

Repository groundwater-quality site

Grand

Junction

Roan Cree k

Colorado River

North Fork Gunnison

River

Oil & gas point location data from Colorado Oil and Gas

Conservation Commission (2010) 

Colorado River

Figure 25. Groundwater-quality sites in the Piceance Basin common data repository and oil and gas wells permitted 

by Colorado Oil and Gas Conservation Commission permit layer. 
Overview of Groundwater Quality in the Piceance Basin 47

Figure 26. Groundwater-quality sites in the Piceance Basin common data repository and domestic and municipal 

wells permitted by Colorado Division of Water Resources (2011).

Rangely

MESA

COUNTY

GARFIELD

COUNTY

RIO BLANCO

COUNTY

COLORADO

UTAH

GUNNISON

COUNTY

MONTROSE

COUNTY

MOFFAT

COUNTY

DELTA

COUNTY

ROUTT

COUNTY

PITKIN

COUNTY

Rifle

Meeker

Montrose

109° 108° 107°

40°

39°

Base from U.S. Geological Survey 1:100,000-scale digital data

Universal Transverse Mercator projection, Zone 13

EXPLANATION

0 10 20 MILES

0 10 20 KILOMETERS

Study area boundary

Municipal or community supply well

Domestic well

Colorado Division of Water Resources

 water well applications

Gunnison River

Un compahgre River

Gunnison Riv er

East Salt Creek

Parachute Creek

Yellow

Creek

Douglas Creek

White Riv e r

Piceance Creek

Repository groundwater-quality site

Grand

Junction

Roan Cree k

Colorado River

North Fork Gunnison

River

Oil & gas point location data from Colorado Oil and Gas

Conservation Commission (2010) 

Plateau Creek

Colorado River
48 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

major water-quality issues in the regional study area. Although 

some components of the constituent set might not be relevant 

to the immediate goals of individual monitoring programs, 

creation of such a dataset for the regional study area would 

help to provide the kinds of information needed to characterize background conditions and the spatial and temporal 

variability in constituent concentrations associated with those 

conditions. Without that information, it becomes difficult to 

recognize departures from background that might be associated with human activities. That kind of information is likely 

to be useful to many monitoring programs. In addition to the 

constituents and ancillary information described above (for 

example, DO and well completion interval), such a basic set of 

constituents might include nitrate, arsenic, chloride, fluoride, 

manganese, selenium, sulfate, methane, and possibly the 

BTEX compounds and stable isotopic compositions of water 

and methane. 

Summary

Groundwater-quality data from public and industry 

sources for the period 1946 to 2009 were compiled and 

loaded into a common data repository for the Piceance Basin. 

This report describes the availability of groundwater-quality 

data in the Piceance Basin in terms of three characteristics: 

spatial (where sample sites were located), temporal (what 

is the period of record), and analytical (what constituents 

were sampled). Spatial variability in constituent concentrations are described and, where possible, examined relative to 

human and natural factors. The repository is available on the 

web at http://rmgsc.cr.usgs.gov/cwqdr/Piceance/index.shtml. 

A subset of groundwater-quality data from this repository 

was compiled, reviewed, and quality assured for this report. 

The resulting dataset consists of the most recently collected 

samples from 1,545 wells, 1,007 (65 percent) of which were 

domestic wells. Concentration data were compared with 

primary and secondary drinking-water standards established 

by the U.S. Environmental Protection Agency. The three 

principal geologic units discussed in this report—Quaternary 

deposits, Tertiary sedimentary rocks, and Cretaceous sedimentary rocks—were the primary host materials for aquifers in the 

Piceance Basin in which water-quality data were collected. 

From those samples, the following constituents were discussed 

in this report: dissolved oxygen, dissolved solids, pH, major 

ions (chloride, sulfate, fluoride), trace elements (arsenic, 

barium, iron, manganese, selenium), nitrate, BTEX compounds (benzene, toluene, ethylbenzene, xylene), methane, 

and the stable isotopic compositions of water and methane. 

Dissolved-oxygen concentration and methane concentrations 

were also used to stratify concentration data per constituent.

The stable isotopic composition of water was used to 

identify potential sources of recharge to wells. Recharge to 

most of the wells for which data were available was derived 

from precipitation, as indicated by δ2

H [H2O] and δ18O[H2O] 

values that plot along the Global Meteoric Water Line and 

near the values of snow samples collected in the study area. 

Recharge to two wells appeared to be derived from a deeper 

groundwater source, as indicated by isotopic values that plot 

near the values for produced water from the Mesaverde Group. 

Reduction/oxidation (redox) processes affect the chemical quality of groundwater in the study area by affecting the 

mobility of potentially toxic metals associated with naturally 

occurring aquifer materials. These processes influence the 

degradation or preservation of anthropogenic contaminants 

such as benzene, toluene, ethylbenzene, and xylene. In addition, these processes can generate undesirable byproducts 

such as dissolved ferrous iron, hydrogen sulfide, and methane. 

Dissolved-oxygen concentrations in 93 percent of the samples 

indicated oxic conditions (less than or equal to 0.5 milligrams 

per liter). Dissolved-oxygen samples were collected primarily 

in Garfield County near Rifle and many of the anoxic wells 

were located in the Mamm Creek–Divide Creek area.

Dissolved solids can be used to infer water sources 

because deeper sources tend to have higher dissolved-solids 

concentrations and are also higher in certain constituents like 

chloride. Dissolved-solids concentrations in 72 percent of 

samples exceeded the secondary drinking-water standard of 

500 milligrams per liter. These exceedances were relatively 

widespread in the study area. Samples from wells screened in 

Quaternary, Tertiary, and Cretaceous geologic units each had 

a distinct suite of major ions. Variations in concentration with 

depth could not be evaluated because of the general lack of 

well-depth and water-level data. Chloride concentrations in 

10 percent of samples exceeded the chloride standard. Of 

those samples with geologic unit or aquifer designations, only 

those from Quaternary units in Mesa County had a median 

chloride concentration greater than the secondary standard. 

Sulfate concentration data in 37 percent of samples exceeded 

the secondary standard of 250 milligrams per liter, and exceedances were relatively widespread in the study area. These data 

indicate that subsurface sulfate sources were relatively common in the study area. In the absence of additional information, such as stable sulfur isotope data, it is difficult to identify 

those sources, but likely sources include minerals such as 

gypsum and pyrite (following oxidation). Produced waters 

are a less likely source of sulfate to the freshwater aquifers. 

Fluoride concentrations in 8.4 percent of samples exceeded the 

primary standard of 4 milligrams per liter. Most of the fluoride 

exceedances were found in Rio Blanco County, although many 

exceedances were observed in the Mamm Creek–Divide Creek 

area of Garfield County. 

Trace elements in groundwater are typically derived from 

minerals in aquifer rocks and sediment that are subsequently 

mobilized by various processes such as redox processes. Arsenic concentrations were available for 256 wells; 33 concentrations (13 percent) exceeded the primary standard of 

10 micrograms per liter, and exceedances occurred primarily 

from Rio Blanco County. Quaternary and Tertiary units in 

Rio Blanco County had the highest median arsenic concentrations (5 and 4 micrograms per liter, respectively). Arsenic 
Summary 49

concentrations were significantly higher (p=0.008) in anoxic 

groundwater than in oxic groundwater, indicating that reductive dissolution of manganese or iron oxide minerals (or both) 

in the aquifer rock and sediment probably was an important 

mechanism for producing elevated arsenic concentrations in 

groundwater. In fact, iron concentrations were significantly 

higher (p=0.001) in samples with arsenic concentrations above 

the primary standard of 10 micrograms per liter than in 

samples with lower arsenic concentrations. The arsenicdissolved oxygen relation also indicates that dissolved-oxygen 

measurements could be a useful indicator of groundwater 

vulnerability to arsenic enrichment. Barium concentrations 

in 4.1 percent of samples exceeded the primary standard of 

2,000 micrograms per liter. Barium exceedances were found 

in samples from Delta, Garfield, and Rio Blanco Counties. 

The Mesaverde Group in Delta County had the highest median 

barium concentrations (90 micrograms per liter). Manganese 

concentrations in 21 percent of samples exceeded the secondary 

standard of 50 micrograms per liter. Exceedances of the 

secondary standard were relatively widespread in the study 

area. Quaternary deposits in Mesa County had the highest 

median manganese concentration (1,410 micrograms per liter). 

Similar to arsenic concentrations, manganese concentrations 

were significantly higher (p=0.001) in anoxic groundwater 

than oxic groundwater. This result indicates that dissolvedoxygen measurements also could be a useful indicator of 

groundwater vulnerability to manganese enrichment. Iron 

concentrations were available for 589 wells, and 96 concentrations (16 percent) exceeded the secondary standard of 

300 micrograms per liter. Most of the exceedances were 

in samples from Garfield and Rio Blanco Counties. Unlike 

arsenic and manganese, iron concentrations were not 

significantly different between oxic and anoxic water samples, 

nor were they different at dissolved-oxygen concentration 

thresholds of 1 and 2 milligrams per liter. The reason for this 

apparent discordant finding is unclear, but it could be related 

to the sample collection and preservation techniques used. 

Selenium concentrations were available for 551 wells, and 

51 concentrations (9.2 percent) exceeded the primary standard 

of 50 micrograms per liter. Most of the samples that exceeded 

the selenium standard were from Garfield County. In this 

study, selenium concentrations were significantly higher 

(p <0.001) in samples containing nitrate at a concentration of 

at least 1 milligram per liter (as nitrogen) than in samples with 

less nitrate. 

Elevated sources of nitrate in groundwater are likely to 

be associated with septic systems, animal manure, or fertilizers applied to lawns and crops. Nitrate concentrations were 

available for 791 wells, and 13 concentrations (1.6 percent) 

exceeded the primary standard of 10 milligrams per liter as 

nitrogen. Most of the samples that exceeded the standard were 

from wells located in agricultural areas of Garfield County. 

Nitrate concentrations ranged from less than detection (most 

commonly about 0.3 milligrams per liter as nitrogen) to 

29.4 milligrams per liter, with a median concentration of 0.21 

milligrams per liter as nitrogen. The highest concentration was 

found in a sample from a domestic well in Garfield County. 

The Wasatch Formation in Garfield County was the only one 

to have at least 10 assigned samples, and the median nitrate 

concentration for those samples was 0.4 milligrams per liter 

as nitrogen. Nitrate concentrations were significantly higher 

(p=0.015) in groundwater containing at least 2 milligrams 

per liter dissolved oxygen than in less oxygenated groundwater. This dissolved oxygen-nitrate relation differs somewhat 

from the relationship described in previous studies, but it 

still indicates that dissolved-oxygen measurements could 

be a useful indicator of groundwater vulnerability to nitrate 

contamination. 

Benzene, toluene, ethylbenzene, and xylene (BTEX) are 

volatile organic compounds typically found in petroleum 

products, such as gasoline and diesel fuel, and also occur in 

some natural gas reservoirs. Benzene concentrations were 

available for 808 wells, but only 11 wells (1.4 percent) had 

detections and 5 concentrations (0.6 percent) exceeded the 

primary standard (5 micrograms per liter). Samples that 

exceeded the standard were from wells located in Garfield and 

Rio Blanco Counties. Toluene concentrations were available 

for 808 wells; 38 wells (4.7 percent) had detections but none 

of the concentrations exceeded the primary drinking-water 

standard (1,000 micrograms per liter). Ethylbenzene and 

xylene were sampled at a frequency similar to that of benzene 

and toluene but they had few detections and no exceedances of 

primary standards. 

Methane is a combustible gas that can accumulate to 

explosive levels in well bores and confined spaces in buildings. 

Methane can be either thermogenic or biogenic in origin. 

Thermogenic methane is generally produced at depths far 

below freshwater aquifers, and its presence in water wells can 

be due to natural conditions, or from activities related to oil 

and gas drilling, completion, and production. Methane concentrations were available for 874 wells primarily in Garfield 

County. Drinking-water standards have not been established 

for methane, which was detected in 24 percent of samples 

(207 wells). Methane concentrations were greater than or 

equal to 1 milligram per liter in 8.5 percent of samples 

(75 samples). The majority of methane detections and high 

methane concentrations were found in Garfield County near 

the Mamm Creek–Divide Creek area. Methane concentrations 

in anoxic groundwater were significantly higher (p=0.004) 

than oxic groundwater, a finding that is consistent with previous results and indicates that dissolved-oxygen measurements 

could be a useful indicator of groundwater vulnerability to 

methane enrichment. Isotopic data indicate that methane in 

the Garfield County water wells was from both biogenic and 

thermogenic sources. For comparison, natural gas from the 

Mesaverde Group in Garfield County was exclusively thermogenic in origin. Biogenic methane in domestic wells could 

have been produced locally in the aquifer if the groundwater 

was anoxic or it could have come from deeper geologic units 

underlying the aquifer. 

Assessing such a large and diverse dataset as the one 

available through the repository poses unique challenges for 
50 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

assessing groundwater quality in the study area. The repository contains data from several studies that differed widely 

in purpose and scope. Data gaps exist in the repository. For 

example, groundwater-quality data in the repository were 

not evenly distributed throughout the study area. Several key 

water-quality constituents or indicators were underrepresented 

in the repository, including dissolved oxygen. Ancillary information, such as well depth, depth to water, and the geologic 

unit or aquifer in which a well was completed, was missing for 

more than 50 percent of the samples. Future monitoring could 

avoid several limitations of the repository by making relatively 

minor changes to sample-collection and data-reporting protocols. The addition of field measurements for dissolved oxygen 

to sampling protocols, for example, is one such change. 

Measuring the water level in a well prior to sampling is 

another. With respect to data reporting, including information on well construction and the geologic unit or aquifer in 

which a well is completed as part of the water-quality database 

would be helpful. Implementing these types of changes would 

increase the comparability of data from different monitoring 

programs and also add value to each program individually and 

to the regional dataset as a whole. Other changes to monitoring 

programs could require greater resources, such as sampling 

for a basic set of constituents that is relevant to major waterquality issues in the regional study area. Creation of such a 

dataset for the regional study area would help to provide the 

kinds of information needed to characterize background conditions and the spatial and temporal variability in constituent 

concentrations associated with those conditions. Without that 

information, it becomes difficult to recognize departures from 

background that might be associated with human activities. 

Acknowledgments

The authors thank the many agencies that provided data 

for this report. The authors acknowledge Berry Petroleum 

Company for their contribution to this project which was 

undertaken in connection with the settlement of an enforcement action taken by the Colorado Department of Public 

Health and Environment for violations of the Water Quality 

Control Act. The author would like to express appreciation to 

Dennis Risser and Matthew Miller for their technical review 

of the manuscript, which aided in the overall improvement of 

this report. 

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Publishing support provided by: 

Denver Publishing Service Center

For more information concerning this publication, contact:

Director, USGS Colorado Water Science Center

Box 25046, Mail Stop 415

Denver, CO 80225

(303) 236-4882

Or visit the Colorado Water Science Center Web site at:

http://co.water.usgs.gov/
Appendix
54 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1 EnCana Oil & Gas (USA) Inc. BARE1WW BARE1WW DOMESTIC USE Garfield County

2 U.S. Geological Survey 393401107595501 SC00509536DCA1 OBSERVATION Garfield County

3 U.S. Geological Survey 393532107583701 SC00509419DDD1 OBSERVATION Garfield County

4 U.S. Geological Survey 393533107565701 SC00509421CDC OBSERVATION Garfield County

5 URS Corporation WMS-202848 WMS-202848 DOMESTIC USE Garfield County

6 U.S. Geological Survey 126150 126150 OBSERVATION Garfield County

8 U.S. Geological Survey 393850108172200 SC00509704BBD1 OBSERVATION Garfield County

9 EnCana Oil & Gas (USA) Inc. OLDL1WW OLDL1WW DOMESTIC USE Garfield County

13 Colorado Oil and Gas Conservation Commission 703875 COGCC Facility ID:703875 PUBLIC SUPPLY Garfield County

14 Colorado Oil and Gas Conservation Commission 703876 COGCC Facility ID:703876 PUBLIC SUPPLY Garfield County

15 Colorado Oil and Gas Conservation Commission 703877 COGCC Facility ID:703877 PUBLIC SUPPLY Garfield County

16 Colorado Oil and Gas Conservation Commission 703878 COGCC Facility ID:703878 PUBLIC SUPPLY Garfield County

17 EnCana Oil & Gas (USA) Inc. LCSMW1 LCSMW1 OBSERVATION Garfield County

18 EnCana Oil & Gas (USA) Inc. LCSMW10 LCSMW10 OBSERVATION Garfield County

19 EnCana Oil & Gas (USA) Inc. LCSMW11 LCSMW11 OBSERVATION Garfield County

20 EnCana Oil & Gas (USA) Inc. LCSMW2 LCSMW2 OBSERVATION Garfield County

21 EnCana Oil & Gas (USA) Inc. LCSMW3 LCSMW3 OBSERVATION Garfield County

22 EnCana Oil & Gas (USA) Inc. LCSMW4 LCSMW4 OBSERVATION Garfield County

23 EnCana Oil & Gas (USA) Inc. LCSMW5 LCSMW5 OBSERVATION Garfield County

24 EnCana Oil & Gas (USA) Inc. LCSMW6 LCSMW6 OBSERVATION Garfield County

25 EnCana Oil & Gas (USA) Inc. lcsmw7 LCSMW7 OBSERVATION Garfield County

26 EnCana Oil & Gas (USA) Inc. LCSMW8 LCSMW8 OBSERVATION Garfield County

27 EnCana Oil & Gas (USA) Inc. LCSMW9 LCSMW9 OBSERVATION Garfield County

28 EnCana Oil & Gas (USA) Inc. LCSSUMP LCSSUMP AGRICULTURAL USE Garfield County

29 U.S. Geological Survey 127013 127013 OBSERVATION Garfield County

30 EnCana Oil & Gas (USA) Inc. KEIN2WW KEIN2WW DOMESTIC USE Garfield County

31 U.S. Geological Survey 126202 126202 OBSERVATION Garfield County

33 U.S. Geological Survey 393011108234201 SC00609925CBA1 AGRICULTURAL USE Garfield County

34 U.S. Geological Survey 393013108234201 SC00609925CBA2 DOMESTIC USE Garfield County

36 U.S. Geological Survey 393311108291401 SC00609907BAC1 DOMESTIC USE Garfield County

38 U.S. Geological Survey 393442108062901 SC00509530CCC1 AGRICULTURAL USE Garfield County

39 U.S. Geological Survey 393637108014301 SC00509514CBD OBSERVATION Garfield County

40 EnCana Oil & Gas (USA) Inc. ENPR10MW ENPR10MW OBSERVATION Garfield County

41 EnCana Oil & Gas (USA) Inc. ENPR11MW ENPR11MW OBSERVATION Garfield County

42 Colorado Oil and Gas Conservation Commission 703181 COGCC Facility ID:703181 DOMESTIC USE Garfield County

43 EnCana Oil & Gas (USA) Inc. ENPR3MW ENPR3MW OBSERVATION Garfield County

44 EnCana Oil & Gas (USA) Inc. ENPR4MW ENPR4MW OBSERVATION Garfield County

45 EnCana Oil & Gas (USA) Inc. ENPR5MW ENPR5MW OBSERVATION Garfield County

46 EnCana Oil & Gas (USA) Inc. ENPR6MW ENPR6MW OBSERVATION Garfield County

47 EnCana Oil & Gas (USA) Inc. ENPR7MW ENPR7MW OBSERVATION Garfield County

48 EnCana Oil & Gas (USA) Inc. ENPR8MW ENPR8MW OBSERVATION Garfield County

49 EnCana Oil & Gas (USA) Inc. ENPR9MW ENPR9MW OBSERVATION Garfield County

50 U.S. Geological Survey 392524107370301 SC00709225BADD GRFLDS10 DOMESTIC USE Garfield County

51 Colorado Oil and Gas Conservation Commission 703200 COGCC Facility ID:703200 DOMESTIC USE Garfield County

52 Colorado Oil and Gas Conservation Commission 703248 COGCC Facility ID:703248 PUBLIC SUPPLY Garfield County

53 Colorado Oil and Gas Conservation Commission 703269 COGCC Facility ID:703269 PUBLIC SUPPLY Garfield County

54 Colorado Oil and Gas Conservation Commission 703022 COGCC Facility ID:703022 DOMESTIC USE Garfield County

55 Colorado Oil and Gas Conservation Commission 703149 COGCC Facility ID:703149 DOMESTIC USE Garfield County

56 Colorado Oil and Gas Conservation Commission 703977 COGCC Facility ID:703977 DOMESTIC USE Garfield County

57 Colorado Oil and Gas Conservation Commission 703978 COGCC Facility ID:703978 DOMESTIC USE Garfield County

58 Colorado Oil and Gas Conservation Commission 703979 COGCC Facility ID:703979 DOMESTIC USE Garfield County

59 Colorado Oil and Gas Conservation Commission 703980 COGCC Facility ID:703980 DOMESTIC USE Garfield County

60 Colorado Oil and Gas Conservation Commission 703998 COGCC Facility ID:703998 DOMESTIC USE Garfield County

61 Colorado Oil and Gas Conservation Commission 704115 COGCC Facility ID:704115 DOMESTIC USE Garfield County

62 Colorado Oil and Gas Conservation Commission 704150 COGCC Facility ID:704150 DOMESTIC USE Garfield County

63 Colorado Oil and Gas Conservation Commission 704166 COGCC Facility ID:704166 OBSERVATION Garfield County

64 Colorado Oil and Gas Conservation Commission 703018 COGCC Facility ID:703018 DOMESTIC USE Garfield County

65 Colorado Oil and Gas Conservation Commission 704167 COGCC Facility ID:704167 OBSERVATION Garfield County

66 Colorado Oil and Gas Conservation Commission 704188 COGCC Facility ID:704188 OBSERVATION Garfield County

67 Colorado Oil and Gas Conservation Commission 704337 COGCC Facility ID:704337 DOMESTIC USE Garfield County

68 Colorado Oil and Gas Conservation Commission 704380 COGCC Facility ID:704380 DOMESTIC USE Garfield County

69 EnCana Oil & Gas (USA) Inc. EICH2WW EICH2WW OBSERVATION Garfield County

70 EnCana Oil & Gas (USA) Inc. EICH3WW EICH3WW OBSERVATION Garfield County

71 Colorado Oil and Gas Conservation Commission 704483 COGCC Facility ID:704483 DOMESTIC USE Garfield County

72 Colorado Oil and Gas Conservation Commission 704485 COGCC Facility ID:704485 DOMESTIC USE Garfield County

73 Colorado Oil and Gas Conservation Commission 704504 COGCC Facility ID:704504 DOMESTIC USE Garfield County
Appendix 55

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

74 Colorado Oil and Gas Conservation Commission 704505 COGCC Facility ID:704505 DOMESTIC USE Garfield County

75 Colorado Oil and Gas Conservation Commission 704506 COGCC Facility ID:704506 DOMESTIC USE Garfield County

76 Colorado Oil and Gas Conservation Commission 704530 COGCC Facility ID:704530 DOMESTIC USE Garfield County

77 Colorado Oil and Gas Conservation Commission 704321 COGCC Facility ID:704321 DOMESTIC USE Garfield County

78 Colorado Oil and Gas Conservation Commission 704336 COGCC Facility ID:704336 DOMESTIC USE Garfield County

79 EnCana Oil & Gas (USA) Inc. DODD1WW DODD1WW DOMESTIC USE Garfield County

80 EnCana Oil & Gas (USA) Inc. EICH1WW EICH1WW DOMESTIC USE Garfield County

81 EnCana Oil & Gas (USA) Inc. HARD2WW HARD2WW DOMESTIC USE Garfield County

82 EnCana Oil & Gas (USA) Inc. LANG6WW LANG6WW DOMESTIC USE Garfield County

83 EnCana Oil & Gas (USA) Inc. LANG7WW LANG7WW DOMESTIC USE Garfield County

84 EnCana Oil & Gas (USA) Inc. LANG8WW LANG8WW DOMESTIC USE Garfield County

85 EnCana Oil & Gas (USA) Inc. LANG9WW LANG9WW DOMESTIC USE Garfield County

86 EnCana Oil & Gas (USA) Inc. MILLWW MILLWW DOMESTIC USE Garfield County

87 EnCana Oil & Gas (USA) Inc. MORG3WW MORG3WW AGRICULTURAL USE Garfield County

88 EnCana Oil & Gas (USA) Inc. MORG4WW MORG4WW DOMESTIC USE Garfield County

89 EnCana Oil & Gas (USA) Inc. SPAU1WW SPAU1WW DOMESTIC USE Garfield County

90 EnCana Oil & Gas (USA) Inc. FAIT1WW FAIT1WW DOMESTIC USE Garfield County

91 EnCana Oil & Gas (USA) Inc. GALL4WW GALL4WW DOMESTIC USE Garfield County

92 EnCana Oil & Gas (USA) Inc. GEOR1WW GEOR1WW DOMESTIC USE Garfield County

93 EnCana Oil & Gas (USA) Inc. HAWK1WW HAWK1WW DOMESTIC USE Garfield County

94 EnCana Oil & Gas (USA) Inc. HAWK2WW HAWK2WW DOMESTIC USE Garfield County

95 EnCana Oil & Gas (USA) Inc. HAWK3WW HAWK3WW DOMESTIC USE Garfield County

96 EnCana Oil & Gas (USA) Inc. HAWK4WW HAWK4WW DOMESTIC USE Garfield County

97 EnCana Oil & Gas (USA) Inc. HAWK5WW HAWK5WW DOMESTIC USE Garfield County

98 EnCana Oil & Gas (USA) Inc. LANG10WW LANG10WW OBSERVATION Garfield County

99 EnCana Oil & Gas (USA) Inc. LANG11WW LANG11WW OBSERVATION Garfield County

100 EnCana Oil & Gas (USA) Inc. LANG12WW LANG12WW OBSERVATION Garfield County

101 EnCana Oil & Gas (USA) Inc. LANG13WW LANG13WW OBSERVATION Garfield County

102 EnCana Oil & Gas (USA) Inc. LANG14WW LANG14WW OBSERVATION Garfield County

103 EnCana Oil & Gas (USA) Inc. LANG15WW LANG15WW OBSERVATION Garfield County

104 EnCana Oil & Gas (USA) Inc. LANG16WW LANG16WW OBSERVATION Garfield County

105 EnCana Oil & Gas (USA) Inc. LANG17WW LANG17WW OBSERVATION Garfield County

106 EnCana Oil & Gas (USA) Inc. LANG18WW LANG18WW OBSERVATION Garfield County

107 EnCana Oil & Gas (USA) Inc. LANG19WW LANG19WW OBSERVATION Garfield County

108 EnCana Oil & Gas (USA) Inc. MCPH2WW MCPH2WW DOMESTIC USE Garfield County

109 EnCana Oil & Gas (USA) Inc. MILL5WW MILL5WW DOMESTIC USE Garfield County

110 EnCana Oil & Gas (USA) Inc. MILL6WW MILL6WW DOMESTIC USE Garfield County

111 EnCana Oil & Gas (USA) Inc. MORG1WW MORG1WW DOMESTIC USE Garfield County

112 EnCana Oil & Gas (USA) Inc. MORG2WW MORG2WW DOMESTIC USE Garfield County

113 EnCana Oil & Gas (USA) Inc. LANG20WW LANG20WW OBSERVATION Garfield County

114 EnCana Oil & Gas (USA) Inc. LANG21WW LANG21WW OBSERVATION Garfield County

115 EnCana Oil & Gas (USA) Inc. LANG22WW LANG22WW OBSERVATION Garfield County

116 EnCana Oil & Gas (USA) Inc. LANG23WW LANG23WW OBSERVATION Garfield County

117 EnCana Oil & Gas (USA) Inc. LANG24WW LANG24WW OBSERVATION Garfield County

118 EnCana Oil & Gas (USA) Inc. LANG25WW LANG25WW OBSERVATION Garfield County

119 EnCana Oil & Gas (USA) Inc. LANG26WW LANG26WW OBSERVATION Garfield County

120 EnCana Oil & Gas (USA) Inc. LANG2WW LANG2WW OBSERVATION Garfield County

121 EnCana Oil & Gas (USA) Inc. LANG3WW LANG3WW OBSERVATION Garfield County

122 EnCana Oil & Gas (USA) Inc. LANG4WW LANG4WW OBSERVATION Garfield County

123 EnCana Oil & Gas (USA) Inc. LANG5WW LANG5WW OBSERVATION Garfield County

124 EnCana Oil & Gas (USA) Inc. LIGH1WW LIGH1WW DOMESTIC USE Garfield County

125 EnCana Oil & Gas (USA) Inc. MCPH1WW MCPH1WW DOMESTIC USE Garfield County

126 EnCana Oil & Gas (USA) Inc. MORT1WW MORT1WW DOMESTIC USE Garfield County

127 EnCana Oil & Gas (USA) Inc. ONEI1WW ONEI1WW DOMESTIC USE Garfield County

128 EnCana Oil & Gas (USA) Inc. VANO2WW VANO2WW DOMESTIC USE Garfield County

129 EnCana Oil & Gas (USA) Inc. VANO3WW VANO3WW DOMESTIC USE Garfield County

130 EnCana Oil & Gas (USA) Inc. RIPP1WW RIPP1WW DOMESTIC USE Garfield County

131 EnCana Oil & Gas (USA) Inc. RIPP2WW RIPP2WW DOMESTIC USE Garfield County

132 EnCana Oil & Gas (USA) Inc. STAU1WW STAU1WW DOMESTIC USE Garfield County

133 EnCana Oil & Gas (USA) Inc. STAU2WW STAU2WW DOMESTIC USE Garfield County

134 EnCana Oil & Gas (USA) Inc. THOM2WW THOM2WW DOMESTIC USE Garfield County

135 EnCana Oil & Gas (USA) Inc. THOM3WW THOM3WW OBSERVATION Garfield County

138 U.S. Geological Survey 393309107200201 SC00608909BBD OBSERVATION Garfield County

142 U.S. Geological Survey 392210108030500 SC00809612AAC1 AGRICULTURAL USE Garfield County

143 Colorado Oil and Gas Conservation Commission 704196 COGCC Facility ID:704196 DOMESTIC USE Garfield County
56 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

144 Colorado Oil and Gas Conservation Commission 704208 COGCC Facility ID:704208 DOMESTIC USE Garfield County

145 Colorado Oil and Gas Conservation Commission 703094 COGCC Facility ID:703094 DOMESTIC USE Garfield County

146 EnCana Oil & Gas (USA) Inc. KNOX1WW KNOX1WW DOMESTIC USE Garfield County

147 EnCana Oil & Gas (USA) Inc. JOLL3WW JOLL3WW OBSERVATION Garfield County

148 EnCana Oil & Gas (USA) Inc. KEIN1WW KEIN1WW DOMESTIC USE Garfield County

149 EnCana Oil & Gas (USA) Inc. KOST1WW KOST1WW DOMESTIC USE Garfield County

150 EnCana Oil & Gas (USA) Inc. SATT1WW SATT1WW DOMESTIC USE Garfield County

151 EnCana Oil & Gas (USA) Inc. SATT2WW SATT2WW DOMESTIC USE Garfield County

152 Colorado Oil and Gas Conservation Commission 703250 COGCC Facility ID:703250 DOMESTIC USE Garfield County

153 Colorado Oil and Gas Conservation Commission 703256 COGCC Facility ID:703256 DOMESTIC USE Garfield County

154 Colorado Oil and Gas Conservation Commission 703258 COGCC Facility ID:703258 DOMESTIC USE Garfield County

155 Colorado Oil and Gas Conservation Commission 703262 COGCC Facility ID:703262 PUBLIC SUPPLY Garfield County

157 Colorado Oil and Gas Conservation Commission 703266 COGCC Facility ID:703266 PUBLIC SUPPLY Garfield County

158 U.S. Geological Survey 392631107411401 SC00709217DCBA GRFLDS1 DOMESTIC USE Garfield County

159 U.S. Geological Survey 392712107440101 SC00709311DDDC GRFLDS2 DOMESTIC USE Garfield County

161 Colorado Oil and Gas Conservation Commission 703542 COGCC Facility ID:703542 DOMESTIC USE Garfield County

162 U.S. Geological Survey 392800107382101 SC00709211BBDC GRFLDS11 DOMESTIC USE Garfield County

163 U.S. Geological Survey 392921107382601 SC00609235BBCB GRFLDS6 DOMESTIC USE Garfield County

164 U.S. Geological Survey 392922107375001 SC00609235ABDB GRFLDS4 DOMESTIC USE Garfield County

165 U.S. Geological Survey 392928107392901 SC00609227CCDC GRFLDS5 DOMESTIC USE Garfield County

166 Colorado Oil and Gas Conservation Commission 703144 COGCC Facility ID:703144 DOMESTIC USE Garfield County

167 Colorado Oil and Gas Conservation Commission 703145 COGCC Facility ID:703145 DOMESTIC USE Garfield County

168 Colorado Oil and Gas Conservation Commission 703803 COGCC Facility ID:703803 DOMESTIC USE Garfield County

169 Colorado Oil and Gas Conservation Commission 703866 COGCC Facility ID:703866 DOMESTIC USE Garfield County

169 Colorado Oil and Gas Conservation Commission 703866 COGCC Facility ID:703866 DOMESTIC USE Garfield County

170 Colorado Oil and Gas Conservation Commission 703915 COGCC Facility ID:703915 DOMESTIC USE Garfield County

171 Colorado Oil and Gas Conservation Commission 704404 COGCC Facility ID:704404 DOMESTIC USE Garfield County

172 Colorado Oil and Gas Conservation Commission 704419 COGCC Facility ID:704419 DOMESTIC USE Garfield County

173 Colorado Oil and Gas Conservation Commission 703952 COGCC Facility ID:703952 DOMESTIC USE Garfield County

174 Colorado Oil and Gas Conservation Commission 703953 COGCC Facility ID:703953 DOMESTIC USE Garfield County

175 Colorado Oil and Gas Conservation Commission 703955 COGCC Facility ID:703955 DOMESTIC USE Garfield County

176 Colorado Oil and Gas Conservation Commission 703956 COGCC Facility ID:703956 DOMESTIC USE Garfield County

177 Colorado Oil and Gas Conservation Commission 703961 COGCC Facility ID:703961 DOMESTIC USE Garfield County

178 Colorado Oil and Gas Conservation Commission 703962 COGCC Facility ID:703962 DOMESTIC USE Garfield County

179 Colorado Oil and Gas Conservation Commission 703967 COGCC Facility ID:703967 DOMESTIC USE Garfield County

180 Colorado Oil and Gas Conservation Commission 703968 COGCC Facility ID:703968 DOMESTIC USE Garfield County

181 Colorado Oil and Gas Conservation Commission 703986 COGCC Facility ID:703986 DOMESTIC USE Garfield County

182 Colorado Oil and Gas Conservation Commission 703996 COGCC Facility ID:703996 DOMESTIC USE Garfield County

182 Colorado Oil and Gas on 703996 COGCC Facility ID:703996 DOMESTIC USE Garfield County

183 Colorado Oil and Gas Conservation Commission 704001 COGCC Facility ID:704001 DOMESTIC USE Garfield County

184 Colorado Oil and Gas Conservation Commission 704004 COGCC Facility ID:704004 DOMESTIC USE Garfield County

185 Colorado Oil and Gas Conservation Commission 704010 COGCC Facility ID:704010 DOMESTIC USE Garfield County

186 Colorado Oil and Gas Conservation Commission 704011 COGCC Facility ID:704011 DOMESTIC USE Garfield County

187 Colorado Oil and Gas Conservation Commission 704012 COGCC Facility ID:704012 DOMESTIC USE Garfield County

187 Colorado Oil and Gas Conservation Commission 704012 COGCC Facility ID:704012 DOMESTIC USE Garfield County

188 Colorado Oil and Gas Conservation Commission 704016 COGCC Facility ID:704016 DOMESTIC USE Garfield County

189 Colorado Oil and Gas Conservation Commission 704023 COGCC Facility ID:704023 DOMESTIC USE Garfield County

189 Colorado Oil and Gas Conservation Commission 704023 COGCC Facility ID:704023 DOMESTIC USE Garfield County

191 Colorado Oil and Gas Conservation Commission 704035 COGCC Facility ID:704035 DOMESTIC USE Garfield County

192 Colorado Oil and Gas Conservation Commission 704038 COGCC Facility ID:704038 DOMESTIC USE Garfield County

193 Colorado Oil and Gas Conservation Commission 704044 COGCC Facility ID:704044 DOMESTIC USE Garfield County

194 Colorado Oil and Gas Conservation Commission 704045 COGCC Facility ID:704045 DOMESTIC USE Garfield County

195 Colorado Oil and Gas Conservation Commission 704048 COGCC Facility ID:704048 DOMESTIC USE Garfield County

196 Colorado Oil and Gas Conservation Commission 704049 COGCC Facility ID:704049 DOMESTIC USE Garfield County

197 Colorado Oil and Gas Conservation Commission 704050 COGCC Facility ID:704050 DOMESTIC USE Garfield County

198 Colorado Oil and Gas Conservation Commission 704051 COGCC Facility ID:704051 DOMESTIC USE Garfield County

199 Colorado Oil and Gas Conservation Commission 704053 COGCC Facility ID:704053 DOMESTIC USE Garfield County

200 Colorado Oil and Gas Conservation Commission 704060 COGCC Facility ID:704060 DOMESTIC USE Garfield County

201 Colorado Oil and Gas Conservation Commission 704074 COGCC Facility ID:704074 DOMESTIC USE Garfield County

201 Colorado Oil and Gas Conservation Commission 704074 COGCC Facility ID:704074 DOMESTIC USE Garfield County

202 Colorado Oil and Gas Conservation Commission 704075 COGCC Facility ID:704075 DOMESTIC USE Garfield County

203 Colorado Oil and Gas Conservation Commission 704076 COGCC Facility ID:704076 DOMESTIC USE Garfield County

203 Colorado Oil and Gas Conservation Commission 704076 COGCC Facility ID:704076 DOMESTIC USE Garfield County

204 Colorado Oil and Gas Conservation Commission 704088 COGCC Facility ID:704088 DOMESTIC USE Garfield County

205 Colorado Oil and Gas Conservation Commission 704151 COGCC Facility ID:704151 DOMESTIC USE Garfield County

205 Colorado Oil and Gas Conservation Commission 704151 COGCC Facility ID:704151 DOMESTIC USE Garfield County

206 Colorado Oil and Gas Conservation Commission 703016 COGCC Facility ID:703016 DOMESTIC USE Garfield County

207 Colorado Oil and Gas Conservation Commission 703017 COGCC Facility ID:703017 DOMESTIC USE Garfield County
Appendix 57

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

208 Colorado Oil and Gas Conservation Commission 704164 COGCC Facility ID:704164 DOMESTIC USE Garfield County

209 Colorado Oil and Gas Conservation Commission 703019 COGCC Facility ID:703019 DOMESTIC USE Garfield County

211 Colorado Oil and Gas Conservation Commission 703021 COGCC Facility ID:703021 DOMESTIC USE Garfield County

213 Colorado Oil and Gas Conservation Commission 704197 COGCC Facility ID:704197 DOMESTIC USE Garfield County

214 Colorado Oil and Gas Conservation Commission 704222 COGCC Facility ID:704222 DOMESTIC USE Garfield County

214 Colorado Oil and Gas Conservation Commission 704222 COGCC Facility ID:704222 DOMESTIC USE Garfield County

215 Colorado Oil and Gas Conservation Commission 704329 COGCC Facility ID:704329 DOMESTIC USE Garfield County

216 Colorado Oil and Gas Conservation Commission 704330 COGCC Facility ID:704330 DOMESTIC USE Garfield County

216 Colorado Oil and Gas Conservation Commission 704330 COGCC Facility ID:704330 DOMESTIC USE Garfield County

217 Colorado Oil and Gas Conservation Commission 704338 COGCC Facility ID:704338 DOMESTIC USE Garfield County

218 Colorado Oil and Gas Conservation Commission 704343 COGCC Facility ID:704343 DOMESTIC USE Garfield County

219 Colorado Oil and Gas Conservation Commission 704374 COGCC Facility ID:704374 DOMESTIC USE Garfield County

220 Colorado Oil and Gas Conservation Commission 704392 COGCC Facility ID:704392 DOMESTIC USE Garfield County

221 Colorado Oil and Gas Conservation Commission 704430 COGCC Facility ID:704430 DOMESTIC USE Garfield County

222 Colorado Oil and Gas Conservation Commission 704434 COGCC Facility ID:704434 DOMESTIC USE Garfield County

223 Colorado Oil and Gas Conservation Commission 703082 COGCC Facility ID:703082 DOMESTIC USE Garfield County

224 EnCana Oil & Gas (USA) Inc. DARD1WW DARD1WW DOMESTIC USE Garfield County

225 EnCana Oil & Gas (USA) Inc. DEXT1WW DEXT1WW DOMESTIC USE Garfield County

226 EnCana Oil & Gas (USA) Inc. diet2ww DIET2WW DOMESTIC USE Garfield County

227 Colorado Oil and Gas Conservation Commission 703969 COGCC Facility ID:703969 DOMESTIC USE Garfield County

228 Colorado Oil and Gas Conservation Commission 703983 COGCC Facility ID:703983 DOMESTIC USE Garfield County

228 Colorado Oil and Gas Conservation Commission 703983 COGCC Facility ID:703983 DOMESTIC USE Garfield County

229 EnCana Oil & Gas (USA) Inc. DOLL1WW DOLL1WW DOMESTIC USE Garfield County

230 EnCana Oil & Gas (USA) Inc. DONE1WW DONE1WW DOMESTIC USE Garfield County

231 EnCana Oil & Gas (USA) Inc. DOWN1WW DOWN1WW DOMESTIC USE Garfield County

232 EnCana Oil & Gas (USA) Inc. DROS1WW DROS1WW DOMESTIC USE Garfield County

233 EnCana Oil & Gas (USA) Inc. DUMA1WW DUMA1WW DOMESTIC USE Garfield County

234 EnCana Oil & Gas (USA) Inc. DUNN1WW DUNN1WW DOMESTIC USE Garfield County

235 Colorado Oil and Gas Conservation Commission 703084 COGCC Facility ID:703084 DOMESTIC USE Garfield County

236 Colorado Oil and Gas Conservation Commission 703086 COGCC Facility ID:703086 DOMESTIC USE Garfield County

237 EnCana Oil & Gas (USA) Inc. EACH1WW EACH1WW DOMESTIC USE Garfield County

238 EnCana Oil & Gas (USA) Inc. ELDE1WW ELDE1WW DOMESTIC USE Garfield County

239 EnCana Oil & Gas (USA) Inc. ELDE2WW ELDE2WW DOMESTIC USE Garfield County

240 EnCana Oil & Gas (USA) Inc. ENRI1WW ENRI1WW DOMESTIC USE Garfield County

241 Colorado Oil and Gas Conservation Commission 703147 COGCC Facility ID:703147 DOMESTIC USE Garfield County

242 Colorado Oil and Gas Conservation Commission 703148 COGCC Facility ID:703148 DOMESTIC USE Garfield County

243 Colorado Oil and Gas Conservation Commission 703182 COGCC Facility ID:703182 DOMESTIC USE Garfield County

244 Colorado Oil and Gas Conservation Commission 703184 COGCC Facility ID:703184 DOMESTIC USE Garfield County

245 Colorado Oil and Gas Conservation Commission 703187 COGCC Facility ID:703187 DOMESTIC USE Garfield County

246 EnCana Oil & Gas (USA) Inc. SPIN1WW SPIN1WW DOMESTIC USE Garfield County

247 EnCana Oil & Gas (USA) Inc. spin2ww SPIN2WW DOMESTIC USE Garfield County

248 Colorado Oil and Gas Conservation Commission 704454 COGCC Facility ID:704454 DOMESTIC USE Garfield County

249 Colorado Oil and Gas Conservation Commission 703260 COGCC Facility ID:703260 DOMESTIC USE Garfield County

250 Colorado Oil and Gas Conservation Commission 704473 COGCC Facility ID:704473 DOMESTIC USE Garfield County

251 Colorado Oil and Gas Conservation Commission 704477 COGCC Facility ID:704477 DOMESTIC USE Garfield County

252 Colorado Oil and Gas Conservation Commission 704500 COGCC Facility ID:704500 DOMESTIC USE Garfield County

253 Colorado Oil and Gas Conservation Commission 704516 COGCC Facility ID:704516 DOMESTIC USE Garfield County

254 Colorado Oil and Gas Conservation Commission 704526 COGCC Facility ID:704526 DOMESTIC USE Garfield County

255 Colorado Oil and Gas Conservation Commission 703900 COGCC Facility ID:703900 DOMESTIC USE Garfield County

256 Colorado Oil and Gas Conservation Commission 704195 COGCC Facility ID:704195 DOMESTIC USE Garfield County

256 Colorado Oil and Gas Conservation Commission 704195 COGCC Facility ID:704195 DOMESTIC USE Garfield County

257 Colorado Oil and Gas Conservation Commission 704198 COGCC Facility ID:704198 DOMESTIC USE Garfield County

258 Colorado Oil and Gas Conservation Commission 704288 COGCC Facility ID:704288 DOMESTIC USE Garfield County

259 Colorado Oil and Gas Conservation Commission 704315 COGCC Facility ID:704315 PUBLIC SUPPLY Garfield County

259 Colorado Oil and Gas Conservation Commission 704315 COGCC Facility ID:704315 PUBLIC SUPPLY Garfield County

260 Colorado Oil and Gas Conservation Commission 704320 COGCC Facility ID:704320 DOMESTIC USE Garfield County

261 Colorado Oil and Gas Conservation Commission 704322 COGCC Facility ID:704322 DOMESTIC USE Garfield County

262 Colorado Oil and Gas Conservation Commission 704326 COGCC Facility ID:704326 DOMESTIC USE Garfield County

263 Colorado Oil and Gas Conservation Commission 704331 COGCC Facility ID:704331 DOMESTIC USE Garfield County

264 Colorado Oil and Gas Conservation Commission 704332 COGCC Facility ID:704332 DOMESTIC USE Garfield County

264 Colorado Oil and Gas Conservation Commission 704332 COGCC Facility ID:704332 DOMESTIC USE Garfield County

265 Colorado Oil and Gas Conservation Commission 704333 COGCC Facility ID:704333 DOMESTIC USE Garfield County

266 Colorado Oil and Gas Conservation Commission 704340 COGCC Facility ID:704340 DOMESTIC USE Garfield County

267 EnCana Oil & Gas (USA) Inc. AABE1WW AABE1WW DOMESTIC USE Garfield County

268 EnCana Oil & Gas (USA) Inc. ANDE2WW ANDE2WW DOMESTIC USE Garfield County

269 EnCana Oil & Gas (USA) Inc. ANGE1WW ANGE1WW DOMESTIC USE Garfield County

270 EnCana Oil & Gas (USA) Inc. ANGE2WW ANGE2WW DOMESTIC USE Garfield County
58 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

271 EnCana Oil & Gas (USA) Inc. ANGE3WW ANGE3WW AGRICULTURAL USE Garfield County

272 EnCana Oil & Gas (USA) Inc. DIET1WW DIET1WW DOMESTIC USE Garfield County

273 EnCana Oil & Gas (USA) Inc. dunc1ww DUNC1WW DOMESTIC USE Garfield County

274 EnCana Oil & Gas (USA) Inc. DUNC2WW DUNC2WW DOMESTIC USE Garfield County

275 EnCana Oil & Gas (USA) Inc. allm1ww ALLM1WW DOMESTIC USE Garfield County

276 EnCana Oil & Gas (USA) Inc. AMOS1WW AMOS1WW DOMESTIC USE Garfield County

277 EnCana Oil & Gas (USA) Inc. ARBA1WW ARBA1WW DOMESTIC USE Garfield County

278 EnCana Oil & Gas (USA) Inc. BELL1WW BELL1WW DOMESTIC USE Garfield County

279 EnCana Oil & Gas (USA) Inc. BELL2WW BELL2WW DOMESTIC USE Garfield County

280 EnCana Oil & Gas (USA) Inc. BELL3WW BELL3WW DOMESTIC USE Garfield County

281 EnCana Oil & Gas (USA) Inc. BUTT1WW BUTT1WW DOMESTIC USE Garfield County

282 EnCana Oil & Gas (USA) Inc. COTT1WW COTT1WW DOMESTIC USE Garfield County

283 EnCana Oil & Gas (USA) Inc. ENCA1ww ENCA1WW DOMESTIC USE Garfield County

284 EnCana Oil & Gas (USA) Inc. ESGA1WW ESGA1WW DOMESTIC USE Garfield County

285 EnCana Oil & Gas (USA) Inc. EUBA1WW EUBA1WW DOMESTIC USE Garfield County

286 EnCana Oil & Gas (USA) Inc. GAGN1WW GAGN1WW DOMESTIC USE Garfield County

287 EnCana Oil & Gas (USA) Inc. grif1ww GRIF1WW DOMESTIC USE Garfield County

288 EnCana Oil & Gas (USA) Inc. BAKE1WW BAKE1WW DOMESTIC USE Garfield County

289 EnCana Oil & Gas (USA) Inc. BALL1WW BALL1WW DOMESTIC USE Garfield County

290 EnCana Oil & Gas (USA) Inc. BARR1WW BARR1WW DOMESTIC USE Garfield County

291 EnCana Oil & Gas (USA) Inc. BELA1WW BELA1WW DOMESTIC USE Garfield County

292 EnCana Oil & Gas (USA) Inc. BELA2WW BELA2WW DOMESTIC USE Garfield County

293 EnCana Oil & Gas (USA) Inc. BELA3WW BELA3WW DOMESTIC USE Garfield County

294 EnCana Oil & Gas (USA) Inc. BELA4WW BELA4WW AGRICULTURAL USE Garfield County

295 EnCana Oil & Gas (USA) Inc. BELA5WW BELA5WW DOMESTIC USE Garfield County

296 EnCana Oil & Gas (USA) Inc. BENN1WW BENN1WW DOMESTIC USE Garfield County

297 EnCana Oil & Gas (USA) Inc. BILC1WW BILC1WW DOMESTIC USE Garfield County

298 EnCana Oil & Gas (USA) Inc. BILC2WW BILC2WW DOMESTIC USE Garfield County

299 EnCana Oil & Gas (USA) Inc. boul1ww BOUL1WW DOMESTIC USE Garfield County

300 EnCana Oil & Gas (USA) Inc. LLOY3WW LLOY3WW DOMESTIC USE Garfield County

301 EnCana Oil & Gas (USA) Inc. LLOY4WW LLOY4WW DOMESTIC USE Garfield County

302 EnCana Oil & Gas (USA) Inc. BUER1WW BUER1WW DOMESTIC USE Garfield County

303 EnCana Oil & Gas (USA) Inc. BUER2WW BUER2WW DOMESTIC USE Garfield County

304 EnCana Oil & Gas (USA) Inc. PAVI2WW PAVI2WW DOMESTIC USE Garfield County

305 EnCana Oil & Gas (USA) Inc. PRIC1WW PRIC1WW DOMESTIC USE Garfield County

306 EnCana Oil & Gas (USA) Inc. PRIC2WW PRIC2WW DOMESTIC USE Garfield County

307 EnCana Oil & Gas (USA) Inc. CAMP1WW CAMP1WW DOMESTIC USE Garfield County

308 EnCana Oil & Gas (USA) Inc. CANO1WW CANO1WW DOMESTIC USE Garfield County

309 EnCana Oil & Gas (USA) Inc. CHAP1WW CHAP1WW DOMESTIC USE Garfield County

310 EnCana Oil & Gas (USA) Inc. schw1ww SCHW1WW DOMESTIC USE Garfield County

311 EnCana Oil & Gas (USA) Inc. COUE2WW COUE2WW DOMESTIC USE Garfield County

312 EnCana Oil & Gas (USA) Inc. COUE3WW COUE3WW DOMESTIC USE Garfield County

313 EnCana Oil & Gas (USA) Inc. CRAI1WW CRAI1WW DOMESTIC USE Garfield County

314 EnCana Oil & Gas (USA) Inc. CRAI2WW CRAI2WW DOMESTIC USE Garfield County

315 EnCana Oil & Gas (USA) Inc. SHAE3WW SHAE3WW DOMESTIC USE Garfield County

316 EnCana Oil & Gas (USA) Inc. SHAN1WW SHAN1WW DOMESTIC USE Garfield County

317 EnCana Oil & Gas (USA) Inc. CRUZ2WW CRUZ2WW DOMESTIC USE Garfield County

318 EnCana Oil & Gas (USA) Inc. CULL1WW CULL1WW DOMESTIC USE Garfield County

319 EnCana Oil & Gas (USA) Inc. curr1ww CURR1WW DOMESTIC USE Garfield County

320 EnCana Oil & Gas (USA) Inc. DAHL1WW DAHL1WW AGRICULTURAL USE Garfield County

321 EnCana Oil & Gas (USA) Inc. DALE3WW DALE3WW DOMESTIC USE Garfield County

322 EnCana Oil & Gas (USA) Inc. SHER2WW SHER2WW DOMESTIC USE Garfield County

323 EnCana Oil & Gas (USA) Inc. FAZZ1WW FAZZ1WW DOMESTIC USE Garfield County

324 EnCana Oil & Gas (USA) Inc. FERG1WW FERG1WW DOMESTIC USE Garfield County

325 EnCana Oil & Gas (USA) Inc. FILI1WW FILI1WW DOMESTIC USE Garfield County

326 EnCana Oil & Gas (USA) Inc. FILI2WW FILI2WW DOMESTIC USE Garfield County

327 EnCana Oil & Gas (USA) Inc. THOM1WW THOM1WW AGRICULTURAL USE Garfield County

328 EnCana Oil & Gas (USA) Inc. thom4ww THOM4WW DOMESTIC USE Garfield County

329 EnCana Oil & Gas (USA) Inc. GALL1WW GALL1WW AGRICULTURAL USE Garfield County

330 EnCana Oil & Gas (USA) Inc. GALL2WW GALL2WW DOMESTIC USE Garfield County

331 EnCana Oil & Gas (USA) Inc. GALL3WW GALL3WW DOMESTIC USE Garfield County

332 EnCana Oil & Gas (USA) Inc. TRUL1WW TRUL1WW DOMESTIC USE Garfield County

333 EnCana Oil & Gas (USA) Inc. vall1ww VALL1WW DOMESTIC USE Garfield County

334 EnCana Oil & Gas (USA) Inc. GARD1WW GARD1WW DOMESTIC USE Garfield County

335 EnCana Oil & Gas (USA) Inc. GEIS1WW GEIS1WW DOMESTIC USE Garfield County
Appendix 59

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

336 EnCana Oil & Gas (USA) Inc. GEIS2WW GEIS2WW DOMESTIC USE Garfield County

337 EnCana Oil & Gas (USA) Inc. GILK1WW GILK1WW DOMESTIC USE Garfield County

338 EnCana Oil & Gas (USA) Inc. GODA1WW GODA1WW DOMESTIC USE Garfield County

339 EnCana Oil & Gas (USA) Inc. GUTH1WW GUTH1WW DOMESTIC USE Garfield County

340 EnCana Oil & Gas (USA) Inc. HARR1WW HARR1WW DOMESTIC USE Garfield County

341 EnCana Oil & Gas (USA) Inc. HAYE1WW HAYE1WW DOMESTIC USE Garfield County

342 EnCana Oil & Gas (USA) Inc. HILL1WW HILL1WW DOMESTIC USE Garfield County

343 EnCana Oil & Gas (USA) Inc. HILL2WW HILL2WW DOMESTIC USE Garfield County

344 EnCana Oil & Gas (USA) Inc. HOFF1WW HOFF1WW DOMESTIC USE Garfield County

345 EnCana Oil & Gas (USA) Inc. HOFF2WW HOFF2WW DOMESTIC USE Garfield County

346 EnCana Oil & Gas (USA) Inc. HOLG1WW HOLG1WW DOMESTIC USE Garfield County

347 EnCana Oil & Gas (USA) Inc. HOOD1WW HOOD1WW DOMESTIC USE Garfield County

348 EnCana Oil & Gas (USA) Inc. HOWA1WW HOWA1WW DOMESTIC USE Garfield County

349 EnCana Oil & Gas (USA) Inc. KNIG1WW KNIG1WW DOMESTIC USE Garfield County

350 EnCana Oil & Gas (USA) Inc. KNIG2WW KNIG2WW DOMESTIC USE Garfield County

351 EnCana Oil & Gas (USA) Inc. KOCH1WW KOCH1WW DOMESTIC USE Garfield County

352 EnCana Oil & Gas (USA) Inc. KOZA1WW KOZA1WW DOMESTIC USE Garfield County

353 EnCana Oil & Gas (USA) Inc. LAND1WW LAND1WW DOMESTIC USE Garfield County

354 EnCana Oil & Gas (USA) Inc. meas1ww MEAS1WW DOMESTIC USE Garfield County

355 EnCana Oil & Gas (USA) Inc. Meas2ww MEAS2WW DOMESTIC USE Garfield County

356 EnCana Oil & Gas (USA) Inc. MEYE1WW MEYE1WW DOMESTIC USE Garfield County

357 EnCana Oil & Gas (USA) Inc. MILL1WW MILL1WW DOMESTIC USE Garfield County

358 EnCana Oil & Gas (USA) Inc. MILL4WW MILL4WW DOMESTIC USE Garfield County

359 EnCana Oil & Gas (USA) Inc. moon1ww MOON1WW OBSERVATION Garfield County

360 EnCana Oil & Gas (USA) Inc. MOON2WW MOON2WW DOMESTIC USE Garfield County

361 EnCana Oil & Gas (USA) Inc. MOOR1WW MOOR1WW DOMESTIC USE Garfield County

362 EnCana Oil & Gas (USA) Inc. LAYM1WW LAYM1WW DOMESTIC USE Garfield County

363 EnCana Oil & Gas (USA) Inc. LLOY1WW LLOY1WW DOMESTIC USE Garfield County

364 EnCana Oil & Gas (USA) Inc. LLOY2WW LLOY2WW DOMESTIC USE Garfield County

365 EnCana Oil & Gas (USA) Inc. LOUT1WW LOUT1WW DOMESTIC USE Garfield County

366 EnCana Oil & Gas (USA) Inc. MALO1WW MALO1WW DOMESTIC USE Garfield County

367 EnCana Oil & Gas (USA) Inc. MALO2WW MALO2WW DOMESTIC USE Garfield County

368 EnCana Oil & Gas (USA) Inc. MALO3WW MALO3WW DOMESTIC USE Garfield County

369 EnCana Oil & Gas (USA) Inc. MANU1WW MANU1WW DOMESTIC USE Garfield County

370 EnCana Oil & Gas (USA) Inc. MCCR1WW MCCR1WW DOMESTIC USE Garfield County

371 EnCana Oil & Gas (USA) Inc. MCCR2WW MCCR2WW DOMESTIC USE Garfield County

372 EnCana Oil & Gas (USA) Inc. MORR1WW MORR1WW DOMESTIC USE Garfield County

373 EnCana Oil & Gas (USA) Inc. OCON1WW OCON1WW DOMESTIC USE Garfield County

374 EnCana Oil & Gas (USA) Inc. PARA1WW PARA1WW DOMESTIC USE Garfield County

375 EnCana Oil & Gas (USA) Inc. PERI1WW PERI1WW DOMESTIC USE Garfield County

376 EnCana Oil & Gas (USA) Inc. PLAT1WW PLAT1WW DOMESTIC USE Garfield County

377 EnCana Oil & Gas (USA) Inc. PLAT2WW PLAT2WW DOMESTIC USE Garfield County

378 EnCana Oil & Gas (USA) Inc. WAGS1WW WAGS1WW DOMESTIC USE Garfield County

379 EnCana Oil & Gas (USA) Inc. WALL1WW WALL1WW DOMESTIC USE Garfield County

380 EnCana Oil & Gas (USA) Inc. WALT2WW WALT2WW DOMESTIC USE Garfield County

381 EnCana Oil & Gas (USA) Inc. WELL2WW WELL2WW DOMESTIC USE Garfield County

382 EnCana Oil & Gas (USA) Inc. RAIL1WW RAIL1WW DOMESTIC USE Garfield County

383 EnCana Oil & Gas (USA) Inc. RICH1WW RICH1WW DOMESTIC USE Garfield County

384 EnCana Oil & Gas (USA) Inc. RIVE1WW RIVE1WW DOMESTIC USE Garfield County

385 EnCana Oil & Gas (USA) Inc. ROE1WW ROE1WW DOMESTIC USE Garfield County

386 EnCana Oil & Gas (USA) Inc. ROLE1WW ROLE1WW DOMESTIC USE Garfield County

387 EnCana Oil & Gas (USA) Inc. ROWE1WW ROWE1WW DOMESTIC USE Garfield County

388 EnCana Oil & Gas (USA) Inc. ROWE2WW ROWE2WW DOMESTIC USE Garfield County

389 EnCana Oil & Gas (USA) Inc. ROWE3WW ROWE3WW DOMESTIC USE Garfield County

390 EnCana Oil & Gas (USA) Inc. ROWE4WW ROWE4WW DOMESTIC USE Garfield County

391 EnCana Oil & Gas (USA) Inc. SCHE1WW SCHE1WW DOMESTIC USE Garfield County

392 EnCana Oil & Gas (USA) Inc. SCHI1WW SCHI1WW DOMESTIC USE Garfield County

393 EnCana Oil & Gas (USA) Inc. SCHI2WW SCHI2WW DOMESTIC USE Garfield County

394 EnCana Oil & Gas (USA) Inc. SCHO1WW SCHO1WW DOMESTIC USE Garfield County

395 EnCana Oil & Gas (USA) Inc. SCHU1WW SCHU1WW DOMESTIC USE Garfield County

396 EnCana Oil & Gas (USA) Inc. SCHU2WW SCHU2WW DOMESTIC USE Garfield County

397 EnCana Oil & Gas (USA) Inc. SHAE1WW SHAE1WW DOMESTIC USE Garfield County

398 EnCana Oil & Gas (USA) Inc. SHAE2WW SHAE2WW AGRICULTURAL USE Garfield County

399 EnCana Oil & Gas (USA) Inc. SHID1WW SHID1WW DOMESTIC USE Garfield County

400 EnCana Oil & Gas (USA) Inc. SHID2WW SHID2WW DOMESTIC USE Garfield County
60 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

401 EnCana Oil & Gas (USA) Inc. SMIT1WW SMIT1WW DOMESTIC USE Garfield County

402 EnCana Oil & Gas (USA) Inc. SMIT3WW SMIT3WW DOMESTIC USE Garfield County

403 EnCana Oil & Gas (USA) Inc. STAR1WW STAR1WW DOMESTIC USE Garfield County

404 EnCana Oil & Gas (USA) Inc. TURN1WW TURN1WW DOMESTIC USE Garfield County

405 EnCana Oil & Gas (USA) Inc. WILL2WW WILL2WW DOMESTIC USE Garfield County

406 EnCana Oil & Gas (USA) Inc. WILL4WW WILL4WW DOMESTIC USE Garfield County

407 EnCana Oil & Gas (USA) Inc. WING1WW WING1WW DOMESTIC USE Garfield County

408 U.S. Geological Survey 392231108153203 SC00809707ACC1 DOMESTIC USE Garfield County

409 U.S. Geological Survey 392242108213701 SC00809807AAD OBSERVATION Garfield County

410 U.S. Geological Survey 392352108160601 SC00709731CCB1 DOMESTIC USE Garfield County

414 U.S. Geological Survey 392859108192101 SC00609833DCC OBSERVATION Garfield County

415 U.S. Geological Survey 392859108193901 SC00609833DDD1 DOMESTIC USE Garfield County

416 U.S. Geological Survey 392923108191401 SC00609834BDC1 DOMESTIC USE Garfield County

417 U.S. Geological Survey 392941108220801 SC00609831ABD1 DOMESTIC USE Garfield County

418 U.S. Geological Survey 126166 126166 OBSERVATION Garfield County

419 U.S. Geological Survey 393836108002401 SC00509501BDC1 OBSERVATION Garfield County

420 U.S. Geological Survey 393009108191601 SC00609827CAB OBSERVATION Garfield County

428 Colorado Oil and Gas Conservation Commission 703240 COGCC Facility ID:703240 DOMESTIC USE Garfield County

429 Colorado Oil and Gas Conservation Commission 703078 COGCC Facility ID:703078 DOMESTIC USE Garfield County

430 Colorado Oil and Gas Conservation Commission 703104 COGCC Facility ID:703104 DOMESTIC USE Garfield County

432 Colorado Oil and Gas Conservation Commission 703141 COGCC Facility ID:703141 DOMESTIC USE Garfield County

433 Colorado Oil and Gas Conservation Commission 703142 COGCC Facility ID:703142 DOMESTIC USE Garfield County

434 Colorado Oil and Gas Conservation Commission 704406 COGCC Facility ID:704406 DOMESTIC USE Garfield County

435 Colorado Oil and Gas Conservation Commission 704407 COGCC Facility ID:704407 DOMESTIC USE Garfield County

436 Colorado Oil and Gas Conservation Commission 704410 COGCC Facility ID:704410 DOMESTIC USE Garfield County

437 Colorado Oil and Gas Conservation Commission 703023 COGCC Facility ID:703023 DOMESTIC USE Garfield County

438 Colorado Oil and Gas Conservation Commission 703028 COGCC Facility ID:703028 DOMESTIC USE Garfield County

439 Colorado Oil and Gas Conservation Commission 704267 COGCC Facility ID:704267 DOMESTIC USE Garfield County

440 Colorado Oil and Gas Conservation Commission 703085 COGCC Facility ID:703085 DOMESTIC USE Garfield County

441 Colorado Oil and Gas Conservation Commission 703140 COGCC Facility ID:703140 DOMESTIC USE Garfield County

442 Colorado Oil and Gas Conservation Commission 704444 COGCC Facility ID:704444 DOMESTIC USE Garfield County

443 Colorado Oil and Gas Conservation Commission 703907 COGCC Facility ID:703907 DOMESTIC USE Garfield County

444 Colorado Oil and Gas Conservation Commission 704540 COGCC Facility ID:704540 DOMESTIC USE Garfield County

445 Colorado Oil and Gas Conservation Commission 704555 COGCC Facility ID:704555 DOMESTIC USE Garfield County

446 Colorado Oil and Gas Conservation Commission 704737 COGCC Facility ID:704737 DOMESTIC USE Garfield County

447 Colorado Oil and Gas Conservation Commission 704738 COGCC Facility ID:704738 DOMESTIC USE Garfield County

447 Colorado Oil and Gas Conservation Commission 704738 COGCC Facility ID:704738 DOMESTIC USE Garfield County

448 Colorado Oil and Gas Conservation Commission 704739 COGCC Facility ID:704739 DOMESTIC USE Garfield County

448 Colorado Oil and Gas Conservation Commission 704739 COGCC Facility ID:704739 DOMESTIC USE Garfield County

449 Colorado Oil and Gas Conservation Commission 704736 COGCC Facility ID:704736 DOMESTIC USE Garfield County

450 Colorado Oil and Gas Conservation Commission 704740 COGCC Facility ID:704740 DOMESTIC USE Garfield County

451 Colorado Oil and Gas Conservation Commission 704741 COGCC Facility ID:704741 DOMESTIC USE Garfield County

452 Colorado Oil and Gas Conservation Commission 704742 COGCC Facility ID:704742 DOMESTIC USE Garfield County

453 Colorado Oil and Gas Conservation Commission 704743 COGCC Facility ID:704743 DOMESTIC USE Garfield County

453 Colorado Oil and Gas Conservation Commission 704743 COGCC Facility ID:704743 DOMESTIC USE Garfield County

454 Colorado Oil and Gas Conservation Commission 704744 COGCC Facility ID:704744 DOMESTIC USE Garfield County

454 Colorado Oil and Gas Conservation Commission 704744 COGCC Facility ID:704744 DOMESTIC USE Garfield County

455 Colorado Department of Agriculture WS-051 WS-051CDOA DOMESTIC USE Garfield County

456 Colorado Department of Agriculture WS-049 WS-049CDOA DOMESTIC USE Garfield County

457 Colorado Oil and Gas Conservation Commission 703192 COGCC Facility ID:703192 DOMESTIC USE Garfield County

458 Colorado Oil and Gas Conservation Commission 703194 COGCC Facility ID:703194 DOMESTIC USE Garfield County

459 Colorado Oil and Gas Conservation Commission 703195 COGCC Facility ID:703195 DOMESTIC USE Garfield County

460 Colorado Oil and Gas Conservation Commission 703255 COGCC Facility ID:703255 DOMESTIC USE Garfield County

461 Colorado Oil and Gas Conservation Commission 703259 COGCC Facility ID:703259 DOMESTIC USE Garfield County

462 Colorado Oil and Gas Conservation Commission 703264 COGCC Facility ID:703264 DOMESTIC USE Garfield County

463 Colorado Oil and Gas Conservation Commission 703267 COGCC Facility ID:703267 PUBLIC SUPPLY Garfield County

464 Colorado Oil and Gas Conservation Commission 703268 COGCC Facility ID:703268 PUBLIC SUPPLY Garfield County

465 U.S. Geological Survey 392848107520201 SC00609434BCD1 (MWX-1) OBSERVATION Garfield County

466 Colorado Oil and Gas Conservation Commission 703048 COGCC Facility ID:703048 DOMESTIC USE Garfield County

468 Colorado Oil and Gas Conservation Commission 703133 COGCC Facility ID:703133 DOMESTIC USE Garfield County

469 Colorado Oil and Gas Conservation Commission 704427 COGCC Facility ID:704427 DOMESTIC USE Garfield County

470 Colorado Oil and Gas Conservation Commission 703988 COGCC Facility ID:703988 DOMESTIC USE Garfield County

471 Colorado Oil and Gas Conservation Commission 703991 COGCC Facility ID:703991 DOMESTIC USE Garfield County

472 Colorado Oil and Gas Conservation Commission 703995 COGCC Facility ID:703995 DOMESTIC USE Garfield County

473 Colorado Oil and Gas Conservation Commission 704017 COGCC Facility ID:704017 DOMESTIC USE Garfield County

474 Colorado Oil and Gas Conservation Commission 704042 COGCC Facility ID:704042 DOMESTIC USE Garfield County

475 Colorado Oil and Gas Conservation Commission 704052 COGCC Facility ID:704052 DOMESTIC USE Garfield County
Appendix 61

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

476 Colorado Oil and Gas Conservation Commission 704063 COGCC Facility ID:704063 DOMESTIC USE Garfield County

477 Colorado Oil and Gas Conservation Commission 704065 COGCC Facility ID:704065 DOMESTIC USE Garfield County

478 Colorado Oil and Gas Conservation Commission 704067 COGCC Facility ID:704067 DOMESTIC USE Garfield County

479 Colorado Oil and Gas Conservation Commission 704304 COGCC Facility ID:704304 OBSERVATION Garfield County

480 Colorado Oil and Gas Conservation Commission 704306 COGCC Facility ID:704306 OBSERVATION Garfield County

481 Colorado Oil and Gas Conservation Commission 704368 COGCC Facility ID:704368 DOMESTIC USE Garfield County

482 Colorado Oil and Gas Conservation Commission 704376 COGCC Facility ID:704376 DOMESTIC USE Garfield County

483 Colorado Oil and Gas Conservation Commission 704379 COGCC Facility ID:704379 DOMESTIC USE Garfield County

484 Colorado Oil and Gas Conservation Commission 704396 COGCC Facility ID:704396 DOMESTIC USE Garfield County

485 Colorado Oil and Gas Conservation Commission 704397 COGCC Facility ID:704397 DOMESTIC USE Garfield County

486 EnCana Oil & Gas (USA) Inc. DURN1WW DURN1WW DOMESTIC USE Garfield County

487 EnCana Oil & Gas (USA) Inc. ENLF1MW ENLF1MW OBSERVATION Garfield County

488 Colorado Oil and Gas Conservation Commission 703120 COGCC Facility ID:703120 DOMESTIC USE Garfield County

489 Colorado Oil and Gas Conservation Commission 703131 COGCC Facility ID:703131 DOMESTIC USE Garfield County

490 Colorado Oil and Gas Conservation Commission 703134 COGCC Facility ID:703134 DOMESTIC USE Garfield County

491 Colorado Oil and Gas Conservation Commission 703222 COGCC Facility ID:703222 DOMESTIC USE Garfield County

492 Colorado Oil and Gas Conservation Commission 704443 COGCC Facility ID:704443 DOMESTIC USE Garfield County

493 Colorado Oil and Gas Conservation Commission 703226 COGCC Facility ID:703226 DOMESTIC USE Garfield County

494 Colorado Oil and Gas Conservation Commission 703235 COGCC Facility ID:703235 PUBLIC SUPPLY Garfield County

495 Colorado Oil and Gas Conservation Commission 703245 COGCC Facility ID:703245 DOMESTIC USE Garfield County

496 Colorado Oil and Gas Conservation Commission 704464 COGCC Facility ID:704464 DOMESTIC USE Garfield County

497 Colorado Oil and Gas Conservation Commission 704509 COGCC Facility ID:704509 DOMESTIC USE Garfield County

498 Colorado Oil and Gas Conservation Commission 704513 COGCC Facility ID:704513 DOMESTIC USE Garfield County

499 Colorado Oil and Gas Conservation Commission 704514 COGCC Facility ID:704514 DOMESTIC USE Garfield County

500 Colorado Oil and Gas Conservation Commission 704532 COGCC Facility ID:704532 DOMESTIC USE Garfield County

501 Colorado Oil and Gas Conservation Commission 704103 COGCC Facility ID:704103 DOMESTIC USE Garfield County

502 Colorado Oil and Gas Conservation Commission 704809 COGCC Facility ID:704809 DOMESTIC USE Garfield County

503 Colorado Oil and Gas Conservation Commission 705430 COGCC Facility ID:705430 DOMESTIC USE Garfield County

504 EnCana Oil & Gas (USA) Inc. ANDE1WW ANDE1WW DOMESTIC USE Garfield County

505 EnCana Oil & Gas (USA) Inc. HUBB1WW HUBB1WW DOMESTIC USE Garfield County

506 EnCana Oil & Gas (USA) Inc. BARN1WW BARN1WW DOMESTIC USE Garfield County

507 EnCana Oil & Gas (USA) Inc. BECK1WW BECK1WW DOMESTIC USE Garfield County

508 EnCana Oil & Gas (USA) Inc. BEEC1WW BEEC1WW DOMESTIC USE Garfield County

509 EnCana Oil & Gas (USA) Inc. BENJ1WW BENJ1WW DOMESTIC USE Garfield County

510 EnCana Oil & Gas (USA) Inc. BENJ2WW BENJ2WW DOMESTIC USE Garfield County

511 EnCana Oil & Gas (USA) Inc. BLAC1WW BLAC1WW DOMESTIC USE Garfield County

512 EnCana Oil & Gas (USA) Inc. BOLA1WW BOLA1WW DOMESTIC USE Garfield County

513 EnCana Oil & Gas (USA) Inc. broc1ww BROC1WW DOMESTIC USE Garfield County

514 EnCana Oil & Gas (USA) Inc. ROSE1WW ROSE1WW DOMESTIC USE Garfield County

515 EnCana Oil & Gas (USA) Inc. CAND1WW CAND1WW DOMESTIC USE Garfield County

516 EnCana Oil & Gas (USA) Inc. CAPP1WW CAPP1WW DOMESTIC USE Garfield County

517 EnCana Oil & Gas (USA) Inc. CHAR1WW CHAR1WW DOMESTIC USE Garfield County

518 EnCana Oil & Gas (USA) Inc. CLOS1WW CLOS1WW DOMESTIC USE Garfield County

519 EnCana Oil & Gas (USA) Inc. CLOS2WW CLOS2WW DOMESTIC USE Garfield County

520 EnCana Oil & Gas (USA) Inc. FRAN2WW FRAN2WW DOMESTIC USE Garfield County

521 EnCana Oil & Gas (USA) Inc. HOGU1WW HOGU1WW DOMESTIC USE Garfield County

522 EnCana Oil & Gas (USA) Inc. HUNT1WW HUNT1WW DOMESTIC USE Garfield County

523 EnCana Oil & Gas (USA) Inc. ISLE1WW ISLE1WW DOMESTIC USE Garfield County

524 EnCana Oil & Gas (USA) Inc. JOHN1WW JOHN1WW DOMESTIC USE Garfield County

525 EnCana Oil & Gas (USA) Inc. KEHR1WW KEHR1WW DOMESTIC USE Garfield County

526 EnCana Oil & Gas (USA) Inc. LAKE1MW LAKE1MW OBSERVATION Garfield County

527 EnCana Oil & Gas (USA) Inc. LANG1WW LANG1WW DOMESTIC USE Garfield County

528 EnCana Oil & Gas (USA) Inc. MILL3WW MILL3WW DOMESTIC USE Garfield County

529 EnCana Oil & Gas (USA) Inc. ZILE1WW ZILE1WW DOMESTIC USE Garfield County

530 EnCana Oil & Gas (USA) Inc. ZIMM1WW ZIMM1WW DOMESTIC USE Garfield County

531 EnCana Oil & Gas (USA) Inc. OVER1WW OVER1WW DOMESTIC USE Garfield County

532 EnCana Oil & Gas (USA) Inc. PARL1WW PARL1WW DOMESTIC USE Garfield County

533 EnCana Oil & Gas (USA) Inc. RHIN1WW RHIN1WW DOMESTIC USE Garfield County

534 EnCana Oil & Gas (USA) Inc. SAVA1WW SAVA1WW DOMESTIC USE Garfield County

535 EnCana Oil & Gas (USA) Inc. SAVA3WW SAVA3WW AGRICULTURAL USE Garfield County

536 EnCana Oil & Gas (USA) Inc. SHER1WW SHER1WW DOMESTIC USE Garfield County

537 EnCana Oil & Gas (USA) Inc. SHUS1WW SHUS1WW DOMESTIC USE Garfield County

538 EnCana Oil & Gas (USA) Inc. SIMM1WW SIMM1WW DOMESTIC USE Garfield County

539 EnCana Oil & Gas (USA) Inc. SKEL1WW SKEL1WW DOMESTIC USE Garfield County

540 EnCana Oil & Gas (USA) Inc. STEI1WW STEI1WW DOMESTIC USE Garfield County
62 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

541 EnCana Oil & Gas (USA) Inc. STOK1WW STOK1WW DOMESTIC USE Garfield County

542 EnCana Oil & Gas (USA) Inc. VALD1WW VALD1WW DOMESTIC USE Garfield County

543 EnCana Oil & Gas (USA) Inc. WILS2WW WILS2WW DOMESTIC USE Garfield County

544 U.S. Geological Survey 392638108005501 SC00709517AAB1

USGS 392638108005501

OBSERVATION Garfield County

558 U.S. Geological Survey 392758108043301 SC00709602DBB1 DOMESTIC USE Garfield County

559 U.S. Geological Survey 392813108044401 SC00709602BDB1 DOMESTIC USE Garfield County

560 U.S. Geological Survey 392835108054900 SC00609634CDB OBSERVATION Garfield County

561 U.S. Geological Survey 392838108053900 SC00609634CAD OBSERVATION Garfield County

562 Colorado Oil and Gas Conservation Commission 703032 COGCC Facility ID:703032 DOMESTIC USE Garfield County

563 Colorado Oil and Gas Conservation Commission 703040 COGCC Facility ID:703040 DOMESTIC USE Garfield County

564 U.S. Geological Survey 392859108055300 SC00609634BDB OBSERVATION Garfield County

565 U.S. Geological Survey 392900108053900 SC00609634BDA OBSERVATION Garfield County

566 U.S. Geological Survey 392920108001400 SC00609528CDD1 COMMERCIAL USE Garfield County

569 U.S. Geological Survey 392936108072500 SC00609629DAA OBSERVATION Garfield County

570 Colorado Oil and Gas Conservation Commission 703091 COGCC Facility ID:703091 DOMESTIC USE Garfield County

571 Colorado Oil and Gas Conservation Commission 703092 COGCC Facility ID:703092 DOMESTIC USE Garfield County

572 Colorado Oil and Gas Conservation Commission 703039 COGCC Facility ID:703039 DOMESTIC USE Garfield County

573 Colorado Oil and Gas Conservation Commission 703069 COGCC Facility ID:703069 DOMESTIC USE Garfield County

574 Colorado Oil and Gas Conservation Commission 703070 COGCC Facility ID:703070 DOMESTIC USE Garfield County

575 EnCana Oil & Gas (USA) Inc. DEKA1 DEKA1 DOMESTIC USE Garfield County

576 Colorado Oil and Gas Conservation Commission 703093 COGCC Facility ID:703093 DOMESTIC USE Garfield County

577 Colorado Oil and Gas Conservation Commission 703096 COGCC Facility ID:703096 DOMESTIC USE Garfield County

578 Colorado Oil and Gas Conservation Commission 703097 COGCC Facility ID:703097 DOMESTIC USE Garfield County

579 EnCana Oil & Gas (USA) Inc. ENYE1WW ENYE1WW DOMESTIC USE Garfield County

580 Colorado Oil and Gas Conservation Commission 703164 COGCC Facility ID:703164 DOMESTIC USE Garfield County

581 Antero Resources ANT3925381080135 ANT3925381080135 DOMESTIC USE Garfield County

582 Antero Resources ANT3925391080145 ANT3925391080145 DOMESTIC USE Garfield County

583 Antero Resources ANT3925481080108 ANT3925481080108 DOMESTIC USE Garfield County

584 Antero Resources ANT3925481080128 ANT3925481080128 DOMESTIC USE Garfield County

585 Antero Resources ANT3925491080052 ANT3925491080052 DOMESTIC USE Garfield County

586 Antero Resources ANT3925491080139 ANT3925491080139 DOMESTIC USE Garfield County

587 Antero Resources ANT3925501080112 ANT3925501080112 DOMESTIC USE Garfield County

588 Antero Resources ANT3925511080108 ANT3925511080108 DOMESTIC USE Garfield County

589 Antero Resources ANT3925511080124 ANT3925511080124 DOMESTIC USE Garfield County

590 Antero Resources ANT3925531080145 ANT3925531080145 DOMESTIC USE Garfield County

591 Antero Resources ANT3925561080144 ANT3925561080144 DOMESTIC USE Garfield County

592 Antero Resources ANT3925601080133 ANT3925601080133 DOMESTIC USE Garfield County

593 Antero Resources ANT3926031080140 ANT3926031080140 DOMESTIC USE Garfield County

594 Antero Resources ANT3926041080145 ANT3926041080145 DOMESTIC USE Garfield County

595 Antero Resources ANT3926041080151 ANT3926041080151 DOMESTIC USE Garfield County

596 Antero Resources ANT3926221080054 ANT3926221080054 DOMESTIC USE Garfield County

597 Antero Resources ANT3926351080051 ANT3926351080051 DOMESTIC USE Garfield County

598 Antero Resources ANT3926371080056 ANT3926371080056 DOMESTIC USE Garfield County

599 Colorado Oil and Gas Conservation Commission 705029 COGCC Facility ID:705029 DOMESTIC USE Garfield County

600 Colorado Oil and Gas Conservation Commission 705051 COGCC Facility ID:705051 DOMESTIC USE Garfield County

601 EnCana Oil & Gas (USA) Inc. Gard3ww GARD3WW DOMESTIC USE Garfield County

602 EnCana Oil & Gas (USA) Inc. BREW1WW BREW1WW DOMESTIC USE Garfield County

603 EnCana Oil & Gas (USA) Inc. CAMP2WW CAMP2WW DOMESTIC USE Garfield County

604 EnCana Oil & Gas (USA) Inc. JOLL2WW JOLL2WW OBSERVATION Garfield County

605 EnCana Oil & Gas (USA) Inc. MCEL1 MCEL1 AGRICULTURAL USE Garfield County

606 EnCana Oil & Gas (USA) Inc. MCEL2 MCEL2 DOMESTIC USE Garfield County

607 EnCana Oil & Gas (USA) Inc. NOCK1WW NOCK1WW DOMESTIC USE Garfield County

608 EnCana Oil & Gas (USA) Inc. PAVI1WW PAVI1WW DOMESTIC USE Garfield County

609 EnCana Oil & Gas (USA) Inc. PAYT1ww PAYT1WW DOMESTIC USE Garfield County

610 EnCana Oil & Gas (USA) Inc. SAVA4WW SAVA4WW DOMESTIC USE Garfield County

611 EnCana Oil & Gas (USA) Inc. TOND1WW TOND1WW DOMESTIC USE Garfield County

612 EnCana Oil & Gas (USA) Inc. TOND2WW TOND2WW DOMESTIC USE Garfield County

613 EnCana Oil & Gas (USA) Inc. TOND3WW TOND3WW DOMESTIC USE Garfield County

614 EnCana Oil & Gas (USA) Inc. WINT1WW WINT1WW DOMESTIC USE Garfield County

615 Colorado Department of Agriculture WS-048 WS-048CDOA DOMESTIC USE Garfield County

616 Colorado Oil and Gas Conservation Commission 703198 COGCC Facility ID:703198 DOMESTIC USE Garfield County

617 Colorado Oil and Gas Conservation Commission 703199 COGCC Facility ID:703199 DOMESTIC USE Garfield County

623 U.S. Geological Survey 393237107450901 SC00609311BCBC GRFLN2 DOMESTIC USE Garfield County

624 U.S. Geological Survey 393314107455801 SC0060930CBDC GRFLN7 DOMESTIC USE Garfield County
Appendix 63

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

625 Colorado Oil and Gas Conservation Commission 703112 COGCC Facility ID:703112 DOMESTIC USE Garfield County

626 Colorado Oil and Gas Conservation Commission 703113 COGCC Facility ID:703113 DOMESTIC USE Garfield County

627 U.S. Geological Survey 393528107453601 SC00509230BADB GRFLN1 DOMESTIC USE Garfield County

628 Colorado Oil and Gas Conservation Commission 703546 COGCC Facility ID:703546 DOMESTIC USE Garfield County

629 Colorado Oil and Gas Conservation Commission 703964 COGCC Facility ID:703964 DOMESTIC USE Garfield County

630 Colorado Oil and Gas Conservation Commission 703989 COGCC Facility ID:703989 DOMESTIC USE Garfield County

631 Colorado Oil and Gas Conservation Commission 703990 COGCC Facility ID:703990 DOMESTIC USE Garfield County

632 Colorado Oil and Gas Conservation Commission 704020 COGCC Facility ID:704020 DOMESTIC USE Garfield County

633 Colorado Oil and Gas Conservation Commission 704064 COGCC Facility ID:704064 DOMESTIC USE Garfield County

634 Colorado Oil and Gas Conservation Commission 703121 COGCC Facility ID:703121 DOMESTIC USE Garfield County

635 Colorado Oil and Gas Conservation Commission 703123 COGCC Facility ID:703123 DOMESTIC USE Garfield County

636 Colorado Oil and Gas Conservation Commission 703124 COGCC Facility ID:703124 DOMESTIC USE Garfield County

637 Colorado Oil and Gas Conservation Commission 703178 COGCC Facility ID:703178 DOMESTIC USE Garfield County

638 Colorado Oil and Gas Conservation Commission 703179 COGCC Facility ID:703179 DOMESTIC USE Garfield County

639 Colorado Oil and Gas Conservation Commission 703180 COGCC Facility ID:703180 DOMESTIC USE Garfield County

640 Colorado Oil and Gas Conservation Commission 704451 COGCC Facility ID:704451 DOMESTIC USE Garfield County

641 Colorado Oil and Gas Conservation Commission 703232 COGCC Facility ID:703232 DOMESTIC USE Garfield County

642 Colorado Oil and Gas Conservation Commission 703233 COGCC Facility ID:703233 PUBLIC SUPPLY Garfield County

643 Colorado Oil and Gas Conservation Commission 704528 COGCC Facility ID:704528 DOMESTIC USE Garfield County

644 Colorado Oil and Gas Conservation Commission 704537 COGCC Facility ID:704537 DOMESTIC USE Garfield County

645 Colorado Oil and Gas Conservation Commission 704539 COGCC Facility ID:704539 DOMESTIC USE Garfield County

646 Colorado Oil and Gas Conservation Commission 704722 COGCC Facility ID:704722 DOMESTIC USE Garfield County

647 Colorado Oil and Gas Conservation Commission 704735 COGCC Facility ID:704735 DOMESTIC USE Garfield County

649 Colorado Oil and Gas Conservation Commission 704758 COGCC Facility ID:704758 DOMESTIC USE Garfield County

650 Colorado Oil and Gas Conservation Commission 704784 COGCC Facility ID:704784 DOMESTIC USE Garfield County

651 Colorado Oil and Gas Conservation Commission 704785 COGCC Facility ID:704785 DOMESTIC USE Garfield County

652 Colorado Oil and Gas Conservation Commission 704805 COGCC Facility ID:704805 DOMESTIC USE Garfield County

653 Colorado Oil and Gas Conservation Commission 705431 COGCC Facility ID:705431 DOMESTIC USE Garfield County

654 Antero Resources ANT3931221074602 ANT3931221074602 DOMESTIC USE Garfield County

655 Antero Resources ANT3931231074601 ANT3931231074601 DOMESTIC USE Garfield County

656 Antero Resources ANT3931391074513 ANT3931391074513 DOMESTIC USE Garfield County

657 Antero Resources ANT3931541074524 ANT3931541074524 DOMESTIC USE Garfield County

658 Antero Resources ANT3932021074527 ANT3932021074527 DOMESTIC USE Garfield County

660 Colorado Oil and Gas Conservation Commission 704723 COGCC Facility ID:704723 DOMESTIC USE Garfield County

660 Colorado Oil and Gas Conservation Commission 704723 COGCC Facility ID:704723 DOMESTIC USE Garfield County

661 Antero Resources ANT3932101074552 ANT3932101074552 DOMESTIC USE Garfield County

662 Colorado Oil and Gas Conservation Commission 704759 COGCC Facility ID:704759 DOMESTIC USE Garfield County

663 Colorado Oil and Gas Conservation Commission 704760 COGCC Facility ID:704760 DOMESTIC USE Garfield County

663 Colorado Oil and Gas Conservation Commission 704760 COGCC Facility ID:704760 DOMESTIC USE Garfield County

664 Antero Resources ANT3932171074514 ANT3932171074514 DOMESTIC USE Garfield County

665 Colorado Oil and Gas Conservation Commission 704783 COGCC Facility ID:704783 DOMESTIC USE Garfield County

666 Colorado Oil and Gas Conservation Commission 704795 COGCC Facility ID:704795 DOMESTIC USE Garfield County

667 Colorado Oil and Gas Conservation Commission 704798 COGCC Facility ID:704798 DOMESTIC USE Garfield County

668 Colorado Oil and Gas Conservation Commission 704799 COGCC Facility ID:704799 DOMESTIC USE Garfield County

669 Antero Resources ANT3932191074528 ANT3932191074528 DOMESTIC USE Garfield County

670 Colorado Oil and Gas Conservation Commission 704800 COGCC Facility ID:704800 DOMESTIC USE Garfield County

671 Colorado Oil and Gas Conservation Commission 704801 COGCC Facility ID:704801 DOMESTIC USE Garfield County

672 Colorado Oil and Gas Conservation Commission 704802 COGCC Facility ID:704802 DOMESTIC USE Garfield County

673 Colorado Oil and Gas Conservation Commission 704807 COGCC Facility ID:704807 DOMESTIC USE Garfield County

674 Colorado Oil and Gas Conservation Commission 704813 COGCC Facility ID:704813 DOMESTIC USE Garfield County

675 Antero Resources ANT3932211074530 ANT3932211074530 DOMESTIC USE Garfield County

676 Antero Resources ANT3933321074537 ANT3933321074537 DOMESTIC USE Garfield County

677 EnCana Oil & Gas (USA) Inc. HUFF1WW HUFF1WW DOMESTIC USE Garfield County

678 EnCana Oil & Gas (USA) Inc. BUSB1WW BUSB1WW DOMESTIC USE Garfield County

679 EnCana Oil & Gas (USA) Inc. DANI1WW DANI1WW DOMESTIC USE Garfield County

680 EnCana Oil & Gas (USA) Inc. FRAN1WW FRAN1WW DOMESTIC USE Garfield County

681 EnCana Oil & Gas (USA) Inc. HASE1WW HASE1WW DOMESTIC USE Garfield County

682 EnCana Oil & Gas (USA) Inc. JEWE2WW JEWE2WW DOMESTIC USE Garfield County

683 EnCana Oil & Gas (USA) Inc. WUSS1WW WUSS1WW DOMESTIC USE Garfield County

684 EnCana Oil & Gas (USA) Inc. LATR1WW LATR1WW DOMESTIC USE Garfield County

685 EnCana Oil & Gas (USA) Inc. MAY1WW MAY1WW DOMESTIC USE Garfield County

686 EnCana Oil & Gas (USA) Inc. MCKE1WW MCKE1WW DOMESTIC USE Garfield County

687 EnCana Oil & Gas (USA) Inc. PETR1WW PETR1WW DOMESTIC USE Garfield County

688 EnCana Oil & Gas (USA) Inc. WEIN1WW WEIN1WW DOMESTIC USE Garfield County

689 EnCana Oil & Gas (USA) Inc. RENN1WW RENN1WW DOMESTIC USE Garfield County

690 EnCana Oil & Gas (USA) Inc. STEW1WW STEW1WW DOMESTIC USE Garfield County

691 U.S. Geological Survey 393746107574801 SC00509508ACC1 OBSERVATION Garfield County
64 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

692 U.S. Geological Survey 392421107565200 R-EX (RULISON 

EXPLORATORY HOLE)

OBSERVATION Garfield County

693 Colorado Oil and Gas Conservation Commission 703190 COGCC Facility ID:703190 DOMESTIC USE Garfield County

694 Colorado Oil and Gas Conservation Commission 703201 COGCC Facility ID:703201 DOMESTIC USE Garfield County

695 Colorado Oil and Gas Conservation Commission 703224 COGCC Facility ID:703224 DOMESTIC USE Garfield County

696 Colorado Oil and Gas Conservation Commission 703225 COGCC Facility ID:703225 DOMESTIC USE Garfield County

699 Colorado Oil and Gas Conservation Commission 703528 COGCC Facility ID:703528 PUBLIC SUPPLY Garfield County

704 U.S. Geological Survey 392854107560000 SC00609431BDC1 COMMERCIAL USE Garfield County

706 Colorado Oil and Gas Conservation Commission 703042 COGCC Facility ID:703042 DOMESTIC USE Garfield County

707 Colorado Oil and Gas Conservation Commission 703044 COGCC Facility ID:703044 DOMESTIC USE Garfield County

708 Colorado Oil and Gas Conservation Commission 703052 COGCC Facility ID:703052 DOMESTIC USE Garfield County

709 Colorado Oil and Gas Conservation Commission 703054 COGCC Facility ID:703054 DOMESTIC USE Garfield County

710 Colorado Oil and Gas Conservation Commission 703057 COGCC Facility ID:703057 DOMESTIC USE Garfield County

711 Colorado Oil and Gas Conservation Commission 703063 COGCC Facility ID:703063 DOMESTIC USE Garfield County

712 Colorado Oil and Gas Conservation Commission 703074 COGCC Facility ID:703074 DOMESTIC USE Garfield County

714 Colorado Oil and Gas Conservation Commission 703075 COGCC Facility ID:703075 DOMESTIC USE Garfield County

715 Colorado Oil and Gas Conservation Commission 703127 COGCC Facility ID:703127 DOMESTIC USE Garfield County

716 Colorado Oil and Gas Conservation Commission 703135 COGCC Facility ID:703135 DOMESTIC USE Garfield County

717 Colorado Oil and Gas Conservation Commission 703136 COGCC Facility ID:703136 DOMESTIC USE Garfield County

718 Colorado Oil and Gas Conservation Commission 703138 COGCC Facility ID:703138 DOMESTIC USE Garfield County

719 Colorado Oil and Gas Conservation Commission 703034 COGCC Facility ID:703034 DOMESTIC USE Garfield County

720 Colorado Oil and Gas Conservation Commission 703035 COGCC Facility ID:703035 DOMESTIC USE Garfield County

721 Colorado Oil and Gas Conservation Commission 704305 COGCC Facility ID:704305 OBSERVATION Garfield County

722 Colorado Oil and Gas Conservation Commission 704307 COGCC Facility ID:704307 OBSERVATION Garfield County

723 Colorado Oil and Gas Conservation Commission 704308 COGCC Facility ID:704308 OBSERVATION Garfield County

724 Colorado Oil and Gas Conservation Commission 704309 COGCC Facility ID:704309 OBSERVATION Garfield County

725 Colorado Oil and Gas Conservation Commission 704312 COGCC Facility ID:704312 OBSERVATION Garfield County

726 Colorado Oil and Gas Conservation Commission 704364 COGCC Facility ID:704364 AGRICULTURAL USE Garfield County

727 Colorado Oil and Gas Conservation Commission 703041 COGCC Facility ID:703041 DOMESTIC USE Garfield County

728 Colorado Oil and Gas Conservation Commission 703043 COGCC Facility ID:703043 DOMESTIC USE Garfield County

729 Colorado Oil and Gas Conservation Commission 703045 COGCC Facility ID:703045 DOMESTIC USE Garfield County

730 Colorado Oil and Gas Conservation Commission 703046 COGCC Facility ID:703046 DOMESTIC USE Garfield County

731 Colorado Oil and Gas Conservation Commission 703049 COGCC Facility ID:703049 DOMESTIC USE Garfield County

732 Colorado Oil and Gas Conservation Commission 703050 COGCC Facility ID:703050 DOMESTIC USE Garfield County

733 Colorado Oil and Gas Conservation Commission 703051 COGCC Facility ID:703051 DOMESTIC USE Garfield County

734 Colorado Oil and Gas Conservation Commission 703053 COGCC Facility ID:703053 DOMESTIC USE Garfield County

735 Colorado Oil and Gas Conservation Commission 703055 COGCC Facility ID:703055 DOMESTIC USE Garfield County

736 Colorado Oil and Gas Conservation Commission 703056 COGCC Facility ID:703056 DOMESTIC USE Garfield County

737 Colorado Oil and Gas Conservation Commission 703058 COGCC Facility ID:703058 DOMESTIC USE Garfield County

738 Colorado Oil and Gas Conservation Commission 703059 COGCC Facility ID:703059 DOMESTIC USE Garfield County

739 Colorado Oil and Gas Conservation Commission 703060 COGCC Facility ID:703060 DOMESTIC USE Garfield County

740 Colorado Oil and Gas Conservation Commission 703061 COGCC Facility ID:703061 DOMESTIC USE Garfield County

741 Colorado Oil and Gas Conservation Commission 703062 COGCC Facility ID:703062 DOMESTIC USE Garfield County

742 Colorado Oil and Gas Conservation Commission 703064 COGCC Facility ID:703064 DOMESTIC USE Garfield County

743 Colorado Oil and Gas Conservation Commission 703098 COGCC Facility ID:703098 DOMESTIC USE Garfield County

744 Colorado Oil and Gas Conservation Commission 703099 COGCC Facility ID:703099 DOMESTIC USE Garfield County

745 Colorado Oil and Gas Conservation Commission 703100 COGCC Facility ID:703100 DOMESTIC USE Garfield County

746 Colorado Oil and Gas Conservation Commission 703114 COGCC Facility ID:703114 DOMESTIC USE Garfield County

747 Colorado Oil and Gas Conservation Commission 703115 COGCC Facility ID:703115 DOMESTIC USE Garfield County

748 Colorado Oil and Gas Conservation Commission 703116 COGCC Facility ID:703116 DOMESTIC USE Garfield County

749 Colorado Oil and Gas Conservation Commission 703117 COGCC Facility ID:703117 DOMESTIC USE Garfield County

750 Colorado Oil and Gas Conservation Commission 703118 COGCC Facility ID:703118 DOMESTIC USE Garfield County

751 Colorado Oil and Gas Conservation Commission 703119 COGCC Facility ID:703119 DOMESTIC USE Garfield County

752 Colorado Oil and Gas Conservation Commission 703122 COGCC Facility ID:703122 DOMESTIC USE Garfield County

753 Colorado Oil and Gas Conservation Commission 703125 COGCC Facility ID:703125 DOMESTIC USE Garfield County

754 Colorado Oil and Gas Conservation Commission 703126 COGCC Facility ID:703126 DOMESTIC USE Garfield County

755 Colorado Oil and Gas Conservation Commission 703128 COGCC Facility ID:703128 DOMESTIC USE Garfield County

756 Colorado Oil and Gas Conservation Commission 703129 COGCC Facility ID:703129 PUBLIC SUPPLY Garfield County

757 Colorado Oil and Gas Conservation Commission 703130 COGCC Facility ID:703130 DOMESTIC USE Garfield County

758 Colorado Oil and Gas Conservation Commission 703137 COGCC Facility ID:703137 DOMESTIC USE Garfield County

759 Colorado Oil and Gas Conservation Commission 703139 COGCC Facility ID:703139 DOMESTIC USE Garfield County

760 Colorado Oil and Gas Conservation Commission 703161 COGCC Facility ID:703161 DOMESTIC USE Garfield County

761 Colorado Oil and Gas Conservation Commission 703162 COGCC Facility ID:703162 DOMESTIC USE Garfield County

762 Colorado Oil and Gas Conservation Commission 703163 COGCC Facility ID:703163 DOMESTIC USE Garfield County

763 Colorado Oil and Gas Conservation Commission 703165 COGCC Facility ID:703165 DOMESTIC USE Garfield County

764 Colorado Oil and Gas Conservation Commission 703166 COGCC Facility ID:703166 DOMESTIC USE Garfield County

765 Colorado Oil and Gas Conservation Commission 703193 COGCC Facility ID:703193 DOMESTIC USE Garfield County
Appendix 65

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

766 Colorado Oil and Gas Conservation Commission 704660 COGCC Facility ID:704660 DOMESTIC USE Garfield County

767 Colorado Oil and Gas Conservation Commission 704664 COGCC Facility ID:704664 DOMESTIC USE Garfield County

768 Colorado Oil and Gas Conservation Commission 704671 COGCC Facility ID:704671 DOMESTIC USE Garfield County

769 Colorado Oil and Gas Conservation Commission 704672 COGCC Facility ID:704672 DOMESTIC USE Garfield County

770 Colorado Oil and Gas Conservation Commission 704674 COGCC Facility ID:704674 DOMESTIC USE Garfield County

771 Colorado Oil and Gas Conservation Commission 704676 COGCC Facility ID:704676 DOMESTIC USE Garfield County

772 Colorado Oil and Gas Conservation Commission 704677 COGCC Facility ID:704677 DOMESTIC USE Garfield County

773 Colorado Oil and Gas Conservation Commission 704678 COGCC Facility ID:704678 DOMESTIC USE Garfield County

774 Colorado Oil and Gas Conservation Commission 704685 COGCC Facility ID:704685 DOMESTIC USE Garfield County

775 EnCana Oil & Gas (USA) Inc. beas1WW BEAS1WW DOMESTIC USE Garfield County

776 EnCana Oil & Gas (USA) Inc. BROD1WW BROD1WW DOMESTIC USE Garfield County

777 EnCana Oil & Gas (USA) Inc. BURD1WW BURD1WW DOMESTIC USE Garfield County

778 EnCana Oil & Gas (USA) Inc. FRAN3WW FRAN3WW DOMESTIC USE Garfield County

779 URS Corporation WMS-110187 WMS-110187 DOMESTIC USE Garfield County

780 URS Corporation WMS-110699 WMS-110699 DOMESTIC USE Garfield County

781 URS Corporation WMS-131809-A WMS-131809-A DOMESTIC USE Garfield County

782 EnCana Oil & Gas (USA) Inc. HANS1WW HANS1WW DOMESTIC USE Garfield County

783 URS Corporation WMS-189716 WMS-189716 DOMESTIC USE Garfield County

784 URS Corporation WMS-194692 WMS-194692 DOMESTIC USE Garfield County

785 URS Corporation WMS-202849 WMS-202849 AGRICULTURAL USE Garfield County

786 URS Corporation WMS-205725 WMS-205725 DOMESTIC USE Garfield County

787 URS Corporation WMS-218976 WMS-218976 DOMESTIC USE Garfield County

788 URS Corporation WMS-55273 WMS-55273 DOMESTIC USE Garfield County

789 URS Corporation WMS-62642 WMS-62642 DOMESTIC USE Garfield County

790 URS Corporation WMS-71080 WMS-71080 DOMESTIC USE Garfield County

791 EnCana Oil & Gas (USA) Inc. HIRN1WW HIRN1WW DOMESTIC USE Garfield County

792 EnCana Oil & Gas (USA) Inc. LEBO1WW LEBO1WW DOMESTIC USE Garfield County

793 EnCana Oil & Gas (USA) Inc. MAHA1WW MAHA1WW DOMESTIC USE Garfield County

794 EnCana Oil & Gas (USA) Inc. Rill1WW RILL1WW DOMESTIC USE Garfield County

795 EnCana Oil & Gas (USA) Inc. sacc1WW SACC1WW DOMESTIC USE Garfield County

796 EnCana Oil & Gas (USA) Inc. SAPP1WW SAPP1WW DOMESTIC USE Garfield County

797 EnCana Oil & Gas (USA) Inc. SAVA2WW SAVA2WW DOMESTIC USE Garfield County

798 EnCana Oil & Gas (USA) Inc. SCHA1WW SCHA1WW DOMESTIC USE Garfield County

799 EnCana Oil & Gas (USA) Inc. SHOR1WW SHOR1WW DOMESTIC USE Garfield County

800 Colorado Department of Agriculture WS-047 WS-047CDOA DOMESTIC USE Garfield County

801 U.S. Geological Survey 393135107442301 SC00609314ACD1 OBSERVATION Garfield County

802 Colorado Oil and Gas Conservation Commission 703261 COGCC Facility ID:703261 DOMESTIC USE Garfield County

803 Colorado Oil and Gas Conservation Commission 703263 COGCC Facility ID:703263 DOMESTIC USE Garfield County

804 U.S. Geological Survey 393009107375401 SC0060925BDAA GRFLDS7 DOMESTIC USE Garfield County

805 U.S. Geological Survey 393101107391001 SC00609222BACD GRFLDS8 DOMESTIC USE Garfield County

806 Colorado Oil and Gas Conservation Commission 703083 COGCC Facility ID:703083 DOMESTIC USE Garfield County

807 U.S. Geological Survey 393101107393201 SC00609222BBDD GRFLDS9 DOMESTIC USE Garfield County

811 U.S. Geological Survey 393310107422101 SC00609206DBAC GRFLN4 DOMESTIC USE Garfield County

812 U.S. Geological Survey 393311107402201 SC00609204CADD GRFLN9 DOMESTIC USE Garfield County

813 U.S. Geological Survey 393318107373601 SC00609202DABA GRFLN3 DOMESTIC USE Garfield County

814 U.S. Geological Survey 393337107394601 SC00609203BCBB GRFLN8 DOMESTIC USE Garfield County

815 Colorado Oil and Gas Conservation Commission 703110 COGCC Facility ID:703110 DOMESTIC USE Garfield County

816 U.S. Geological Survey 393407107430901 SC00509233DBCB GRFLN5 DOMESTIC USE Garfield County

817 U.S. Geological Survey 393415107415201 SC00509234DBAC GRFLN10 DOMESTIC USE Garfield County

818 Colorado Oil and Gas Conservation Commission 703111 COGCC Facility ID:703111 DOMESTIC USE Garfield County

819 U.S. Geological Survey 393429107412400 SC0050923BBD00-BARRIE DOMESTIC USE Garfield County

820 U.S. Geological Survey 393456107404501 SC0060920DACB GRFLN6 DOMESTIC USE Garfield County

821 Colorado Oil and Gas Conservation Commission 703143 COGCC Facility ID:703143 DOMESTIC USE Garfield County

822 Colorado Oil and Gas Conservation Commission 704415 COGCC Facility ID:704415 DOMESTIC USE Garfield County

823 Colorado Oil and Gas Conservation Commission 704416 COGCC Facility ID:704416 DOMESTIC USE Garfield County

824 Colorado Oil and Gas Conservation Commission 704417 COGCC Facility ID:704417 DOMESTIC USE Garfield County

825 Colorado Oil and Gas Conservation Commission 704418 COGCC Facility ID:704418 DOMESTIC USE Garfield County

826 Colorado Oil and Gas Conservation Commission 704423 COGCC Facility ID:704423 DOMESTIC USE Garfield County

827 Colorado Oil and Gas Conservation Commission 704424 COGCC Facility ID:704424 DOMESTIC USE Garfield County

828 Colorado Oil and Gas Conservation Commission 703029 COGCC Facility ID:703029 DOMESTIC USE Garfield County

829 Colorado Oil and Gas Conservation Commission 703030 COGCC Facility ID:703030 DOMESTIC USE Garfield County

830 Colorado Oil and Gas Conservation Commission 703031 COGCC Facility ID:703031 DOMESTIC USE Garfield County

831 Colorado Oil and Gas Conservation Commission 704265 COGCC Facility ID:704265 DOMESTIC USE Garfield County

832 Colorado Oil and Gas Conservation Commission 704431 COGCC Facility ID:704431 DOMESTIC USE Garfield County

833 Colorado Oil and Gas Conservation Commission 704432 COGCC Facility ID:704432 DOMESTIC USE Garfield County

834 Colorado Oil and Gas Conservation Commission 703079 COGCC Facility ID:703079 DOMESTIC USE Garfield County
66 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

835 Colorado Oil and Gas Conservation Commission 703080 COGCC Facility ID:703080 DOMESTIC USE Garfield County

836 Colorado Oil and Gas Conservation Commission 703081 COGCC Facility ID:703081 DOMESTIC USE Garfield County

837 Colorado Oil and Gas Conservation Commission 703101 COGCC Facility ID:703101 DOMESTIC USE Garfield County

838 Colorado Oil and Gas Conservation Commission 703102 COGCC Facility ID:703102 DOMESTIC USE Garfield County

838 Colorado Oil and Gas Conservation Commission 703102 COGCC Facility ID:703102 DOMESTIC USE Garfield County

839 Colorado Oil and Gas Conservation Commission 703103 COGCC Facility ID:703103 DOMESTIC USE Garfield County

840 Colorado Oil and Gas Conservation Commission 703107 COGCC Facility ID:703107 DOMESTIC USE Garfield County

840 Colorado Oil and Gas Conservation Commission 703107 COGCC Facility ID:703107 DOMESTIC USE Garfield County

841 Colorado Oil and Gas Conservation Commission 703108 COGCC Facility ID:703108 DOMESTIC USE Garfield County

842 Colorado Oil and Gas Conservation Commission 703109 COGCC Facility ID:703109 DOMESTIC USE Garfield County

842 Colorado Oil and Gas Conservation Commission 703109 COGCC Facility ID:703109 DOMESTIC USE Garfield County

843 Colorado Oil and Gas Conservation Commission 703185 COGCC Facility ID:703185 DOMESTIC USE Garfield County

844 Colorado Oil and Gas Conservation Commission 703186 COGCC Facility ID:703186 DOMESTIC USE Garfield County

845 Colorado Oil and Gas Conservation Commission 703236 COGCC Facility ID:703236 DOMESTIC USE Garfield County

846 Colorado Oil and Gas Conservation Commission 704460 COGCC Facility ID:704460 DOMESTIC USE Garfield County

847 Colorado Oil and Gas Conservation Commission 704475 COGCC Facility ID:704475 DOMESTIC USE Garfield County

848 Colorado Oil and Gas Conservation Commission 704515 COGCC Facility ID:704515 DOMESTIC USE Garfield County

849 Colorado Oil and Gas Conservation Commission 704534 COGCC Facility ID:704534 DOMESTIC USE Garfield County

850 Colorado Oil and Gas Conservation Commission 704545 COGCC Facility ID:704545 DOMESTIC USE Garfield County

851 Colorado Oil and Gas Conservation Commission 704558 COGCC Facility ID:704558 DOMESTIC USE Garfield County

852 Colorado Oil and Gas Conservation Commission 704695 COGCC Facility ID:704695 DOMESTIC USE Garfield County

853 Colorado Oil and Gas Conservation Commission 704696 COGCC Facility ID:704696 DOMESTIC USE Garfield County

854 Colorado Oil and Gas Conservation Commission 704697 COGCC Facility ID:704697 DOMESTIC USE Garfield County

855 Colorado Oil and Gas Conservation Commission 704709 COGCC Facility ID:704709 DOMESTIC USE Garfield County

855 Colorado Oil and Gas Conservation Commission 704709 COGCC Facility ID:704709 DOMESTIC USE Garfield County

856 Colorado Oil and Gas Conservation Commission 704711 COGCC Facility ID:704711 DOMESTIC USE Garfield County

857 Colorado Oil and Gas Conservation Commission 704713 COGCC Facility ID:704713 DOMESTIC USE Garfield County

858 Colorado Oil and Gas Conservation Commission 704715 COGCC Facility ID:704715 DOMESTIC USE Garfield County

859 Colorado Oil and Gas Conservation Commission 704717 COGCC Facility ID:704717 DOMESTIC USE Garfield County

860 Colorado Oil and Gas Conservation Commission 704720 COGCC Facility ID:704720 DOMESTIC USE Garfield County

860 Colorado Oil and Gas Conservation Commission 704720 COGCC Facility ID:704720 DOMESTIC USE Garfield County

861 Colorado Oil and Gas Conservation Commission 704725 COGCC Facility ID:704725 DOMESTIC USE Garfield County

862 Colorado Oil and Gas Conservation Commission 704732 COGCC Facility ID:704732 DOMESTIC USE Garfield County

862 Colorado Oil and Gas Conservation Commission 704732 COGCC Facility ID:704732 DOMESTIC USE Garfield County

863 Colorado Oil and Gas Conservation Commission 704234 COGCC Facility ID:704234 DOMESTIC USE Garfield County

864 Colorado Oil and Gas Conservation Commission 704748 COGCC Facility ID:704748 DOMESTIC USE Garfield County

865 Colorado Oil and Gas Conservation Commission 704750 COGCC Facility ID:704750 DOMESTIC USE Garfield County

866 Colorado Oil and Gas Conservation Commission 704754 COGCC Facility ID:704754 DOMESTIC USE Garfield County

866 Colorado Oil and Gas Conservation Commission 704754 COGCC Facility ID:704754 DOMESTIC USE Garfield County

867 Colorado Oil and Gas Conservation Commission 704755 COGCC Facility ID:704755 DOMESTIC USE Garfield County

868 Colorado Oil and Gas Conservation Commission 704756 COGCC Facility ID:704756 DOMESTIC USE Garfield County

869 Colorado Oil and Gas Conservation Commission 704763 COGCC Facility ID:704763 DOMESTIC USE Garfield County

870 Antero Resources ANT3930451074016 ANT3930451074016 DOMESTIC USE Garfield County

871 Antero Resources ANT3931001074241 ANT3931001074241 DOMESTIC USE Garfield County

872 Antero Resources ANT3931011073910 ANT3931011073910 DOMESTIC USE Garfield County

873 Antero Resources ANT3931021073954 ANT3931021073954 DOMESTIC USE Garfield County

874 Antero Resources ANT3931111074058 ANT3931111074058 DOMESTIC USE Garfield County

875 Antero Resources ANT3931121074228 ANT3931121074228 DOMESTIC USE Garfield County

876 Antero Resources ANT3931151074158 ANT3931151074158 DOMESTIC USE Garfield County

877 Antero Resources ANT3931401074214 ANT3931401074214 DOMESTIC USE Garfield County

878 Antero Resources ANT3931451074446 ANT3931451074446 DOMESTIC USE Garfield County

879 Antero Resources ANT3931501073746 ANT3931501073746 DOMESTIC USE Garfield County

880 Antero Resources ANT3931511074137 ANT3931511074137 DOMESTIC USE Garfield County

881 Antero Resources ANT3931511074140 ANT3931511074140 DOMESTIC USE Garfield County

882 Antero Resources ANT3931511074144 ANT3931511074144 DOMESTIC USE Garfield County

883 Antero Resources ANT3931511074206 ANT3931511074206 DOMESTIC USE Garfield County

884 Antero Resources ANT3931521074050 ANT3931521074050 DOMESTIC USE Garfield County

885 Antero Resources ANT3931531074013 ANT3931531074013 DOMESTIC USE Garfield County

886 Colorado Oil and Gas Conservation Commission 704556 COGCC Facility ID:704556 DOMESTIC USE Garfield County

887 Antero Resources ANT3931531074017 ANT3931531074017 DOMESTIC USE Garfield County

888 Antero Resources ANT3931531074127 ANT3931531074127 DOMESTIC USE Garfield County

889 Antero Resources ANT3931561074055 ANT3931561074055 DOMESTIC USE Garfield County

890 Antero Resources ANT3931581074011 ANT3931581074011 DOMESTIC USE Garfield County

891 Antero Resources ANT3931591073750 ANT3931591073750 DOMESTIC USE Garfield County

892 Antero Resources ANT3931591074017 ANT3931591074017 DOMESTIC USE Garfield County

893 Antero Resources ANT3931601074012 ANT3931601074012 DOMESTIC USE Garfield County
Appendix 67

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

894 Antero Resources ANT3932021074034 ANT3932021074034 DOMESTIC USE Garfield County

895 Antero Resources ANT3932031074454 ANT3932031074454 DOMESTIC USE Garfield County

896 Antero Resources ANT3932041073917 ANT3932041073917 DOMESTIC USE Garfield County

897 Colorado Oil and Gas Conservation Commission 704710 COGCC Facility ID:704710 DOMESTIC USE Garfield County

898 Colorado Oil and Gas Conservation Commission 704712 COGCC Facility ID:704712 DOMESTIC USE Garfield County

898 Colorado Oil and Gas Conservation Commission 704712 COGCC Facility ID:704712 DOMESTIC USE Garfield County

899 Colorado Oil and Gas Conservation Commission 704714 COGCC Facility ID:704714 DOMESTIC USE Garfield County

899 Colorado Oil and Gas Conservation Commission 704714 COGCC Facility ID:704714 DOMESTIC USE Garfield County

900 Antero Resources ANT3932041073919 ANT3932041073919 DOMESTIC USE Garfield County

901 Antero Resources ANT3932041074019 ANT3932041074019 DOMESTIC USE Garfield County

902 Antero Resources ANT3932041074035 ANT3932041074035 DOMESTIC USE Garfield County

903 Antero Resources ANT3932061073907 ANT3932061073907 DOMESTIC USE Garfield County

904 Antero Resources ANT3932061073911 ANT3932061073911 DOMESTIC USE Garfield County

905 Colorado Oil and Gas Conservation Commission 704716 COGCC Facility ID:704716 DOMESTIC USE Garfield County

905 Colorado Oil and Gas Conservation Commission 704716 COGCC Facility ID:704716 DOMESTIC USE Garfield County

906 Colorado Oil and Gas Conservation Commission 704718 COGCC Facility ID:704718 DOMESTIC USE Garfield County

907 Colorado Oil and Gas Conservation Commission 704719 COGCC Facility ID:704719 DOMESTIC USE Garfield County

907 Colorado Oil and Gas Conservation Commission 704719 COGCC Facility ID:704719 DOMESTIC USE Garfield County

908 Colorado Oil and Gas Conservation Commission 704724 COGCC Facility ID:704724 DOMESTIC USE Garfield County

908 Colorado Oil and Gas Conservation Commission 704724 COGCC Facility ID:704724 DOMESTIC USE Garfield County

909 Antero Resources ANT3932061074012 ANT3932061074012 DOMESTIC USE Garfield County

910 Colorado Oil and Gas Conservation Commission 704726 COGCC Facility ID:704726 DOMESTIC USE Garfield County

911 Colorado Oil and Gas Conservation Commission 704727 COGCC Facility ID:704727 DOMESTIC USE Garfield County

912 Colorado Oil and Gas Conservation Commission 704728 COGCC Facility ID:704728 DOMESTIC USE Garfield County

913 Colorado Oil and Gas Conservation Commission 704729 COGCC Facility ID:704729 DOMESTIC USE Garfield County

913 Colorado Oil and Gas Conservation Commission 704729 COGCC Facility ID:704729 DOMESTIC USE Garfield County

915 Colorado Oil and Gas Conservation Commission 704731 COGCC Facility ID:704731 DOMESTIC USE Garfield County

916 Colorado Oil and Gas Conservation Commission 704733 COGCC Facility ID:704733 DOMESTIC USE Garfield County

916 Colorado Oil and Gas Conservation Commission 704733 COGCC Facility ID:704733 DOMESTIC USE Garfield County

917 Antero Resources ANT3932111073945 ANT3932111073945 DOMESTIC USE Garfield County

918 Colorado Oil and Gas Conservation Commission 704734 COGCC Facility ID:704734 DOMESTIC USE Garfield County

918 Colorado Oil and Gas Conservation Commission 704734 COGCC Facility ID:704734 DOMESTIC USE Garfield County

919 Antero Resources ANT3932121073847 ANT3932121073847 DOMESTIC USE Garfield County

920 Antero Resources ANT3932131073818 ANT3932131073818 DOMESTIC USE Garfield County

921 Antero Resources ANT3932131073842 ANT3932131073842 DOMESTIC USE Garfield County

922 Colorado Oil and Gas Conservation Commission 704745 COGCC Facility ID:704745 DOMESTIC USE Garfield County

923 Colorado Oil and Gas Conservation Commission 704746 COGCC Facility ID:704746 DOMESTIC USE Garfield County

924 Colorado Oil and Gas Conservation Commission 704747 COGCC Facility ID:704747 DOMESTIC USE Garfield County

924 Colorado Oil and Gas Conservation Commission 704747 COGCC Facility ID:704747 DOMESTIC USE Garfield County

925 Colorado Oil and Gas Conservation Commission 704749 COGCC Facility ID:704749 DOMESTIC USE Garfield County

925 Colorado Oil and Gas Conservation Commission 704749 COGCC Facility ID:704749 DOMESTIC USE Garfield County

926 Colorado Oil and Gas Conservation Commission 704751 COGCC Facility ID:704751 DOMESTIC USE Garfield County

927 Antero Resources ANT3932131074453 ANT3932131074453 DOMESTIC USE Garfield County

928 Colorado Oil and Gas Conservation Commission 704752 COGCC Facility ID:704752 DOMESTIC USE Garfield County

928 Colorado Oil and Gas Conservation Commission 704752 COGCC Facility ID:704752 DOMESTIC USE Garfield County

930 Antero Resources ANT3932141074421 ANT3932141074421 DOMESTIC USE Garfield County

931 Antero Resources ANT3932171074038 ANT3932171074038 DOMESTIC USE Garfield County

932 Antero Resources ANT3932181073847 ANT3932181073847 DOMESTIC USE Garfield County

933 Colorado Oil and Gas Conservation Commission 704761 COGCC Facility ID:704761 DOMESTIC USE Garfield County

934 Colorado Oil and Gas Conservation Commission 704762 COGCC Facility ID:704762 DOMESTIC USE Garfield County

934 Colorado Oil and Gas Conservation Commission 704762 COGCC Facility ID:704762 DOMESTIC USE Garfield County

935 Antero Resources ANT3932201074446 ANT3932201074446 DOMESTIC USE Garfield County

936 Antero Resources ANT3932221073940 ANT3932221073940 DOMESTIC USE Garfield County

937 Antero Resources ANT3932221074413 ANT3932221074413 DOMESTIC USE Garfield County

938 Antero Resources ANT3932231073941 ANT3932231073941 DOMESTIC USE Garfield County

939 Antero Resources ANT3932251074410 ANT3932251074410 DOMESTIC USE Garfield County

940 Antero Resources ANT3932251074431 ANT3932251074431 DOMESTIC USE Garfield County

941 Antero Resources ANT3932261074419 ANT3932261074419 DOMESTIC USE Garfield County

942 Antero Resources ANT3932291074416 ANT3932291074416 DOMESTIC USE Garfield County

943 Antero Resources ANT3932311074422 ANT3932311074422 DOMESTIC USE Garfield County

944 Antero Resources ANT3932311074441 ANT3932311074441 DOMESTIC USE Garfield County

945 Antero Resources ANT3932341073950 ANT3932341073950 DOMESTIC USE Garfield County

946 Antero Resources ANT3932341073954 ANT3932341073954 DOMESTIC USE Garfield County

947 Antero Resources ANT3932351074324 ANT3932351074324 DOMESTIC USE Garfield County

948 Antero Resources ANT3932371074360 ANT3932371074360 DOMESTIC USE Garfield County

949 Antero Resources ANT3932391074433 ANT3932391074433 DOMESTIC USE Garfield County
68 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

950 Antero Resources ANT3932401074311 ANT3932401074311 DOMESTIC USE Garfield County

951 Antero Resources ANT3932401074351 ANT3932401074351 DOMESTIC USE Garfield County

952 Antero Resources ANT3932411074410 ANT3932411074410 DOMESTIC USE Garfield County

953 Antero Resources ANT3932421074359 ANT3932421074359 DOMESTIC USE Garfield County

954 Antero Resources ANT3932451074320 ANT3932451074320 DOMESTIC USE Garfield County

955 Antero Resources ANT3932461074234 ANT3932461074234 DOMESTIC USE Garfield County

956 Antero Resources ANT3932471074356 ANT3932471074356 DOMESTIC USE Garfield County

957 Antero Resources ANT3932481074110 ANT3932481074110 DOMESTIC USE Garfield County

958 Antero Resources ANT3932481074229 ANT3932481074229 DOMESTIC USE Garfield County

959 Antero Resources ANT3932481074309 ANT3932481074309 DOMESTIC USE Garfield County

960 Antero Resources ANT3932491074226 ANT3932491074226 DOMESTIC USE Garfield County

961 Antero Resources ANT3932491074242 ANT3932491074242 DOMESTIC USE Garfield County

962 Antero Resources ANT3932511074229 ANT3932511074229 DOMESTIC USE Garfield County

963 Antero Resources ANT3932511074253 ANT3932511074253 DOMESTIC USE Garfield County

964 Antero Resources ANT3932511074258 ANT3932511074258 DOMESTIC USE Garfield County

965 Antero Resources ANT3932531074234 ANT3932531074234 DOMESTIC USE Garfield County

966 Antero Resources ANT3932531074237 ANT3932531074237 DOMESTIC USE Garfield County

967 Antero Resources ANT3932541074350 ANT3932541074350 DOMESTIC USE Garfield County

968 Antero Resources ANT3932551074340 ANT3932551074340 DOMESTIC USE Garfield County

969 Antero Resources ANT3932561074156 ANT3932561074156 DOMESTIC USE Garfield County

970 Antero Resources ANT3932561074158 ANT3932561074158 DOMESTIC USE Garfield County

971 Antero Resources ANT3932581074236 ANT3932581074236 DOMESTIC USE Garfield County

972 Antero Resources ANT3932581074408 ANT3932581074408 DOMESTIC USE Garfield County

973 Antero Resources ANT3932581074415 ANT3932581074415 DOMESTIC USE Garfield County

974 Antero Resources ANT3932591074113 ANT3932591074113 DOMESTIC USE Garfield County

975 Antero Resources ANT3932591074203 ANT3932591074203 DOMESTIC USE Garfield County

976 Antero Resources ANT3932601074160 ANT3932601074160 DOMESTIC USE Garfield County

977 Antero Resources ANT3933001074148 ANT3933001074148 DOMESTIC USE Garfield County

978 Antero Resources ANT3933011074118 ANT3933011074118 DOMESTIC USE Garfield County

979 Antero Resources ANT3933011074200 ANT3933011074200 DOMESTIC USE Garfield County

980 Antero Resources ANT3933011074305 ANT3933011074305 DOMESTIC USE Garfield County

981 Antero Resources ANT3933011074355 ANT3933011074355 DOMESTIC USE Garfield County

982 Antero Resources ANT3933021074114 ANT3933021074114 DOMESTIC USE Garfield County

983 Antero Resources ANT3933021074302 ANT3933021074302 DOMESTIC USE Garfield County

984 Antero Resources ANT3933031074112 ANT3933031074112 DOMESTIC USE Garfield County

985 Antero Resources ANT3933031074129 ANT3933031074129 DOMESTIC USE Garfield County

986 Antero Resources ANT3933031074136 ANT3933031074136 DOMESTIC USE Garfield County

987 Antero Resources ANT3933031074236 ANT3933031074236 DOMESTIC USE Garfield County

988 Antero Resources ANT3933041074110 ANT3933041074110 DOMESTIC USE Garfield County

989 Antero Resources ANT3933041074147 ANT3933041074147 DOMESTIC USE Garfield County

990 Antero Resources ANT3933051074203 ANT3933051074203 DOMESTIC USE Garfield County

991 Antero Resources ANT3933051074311 ANT3933051074311 DOMESTIC USE Garfield County

992 Antero Resources ANT3933051074315 ANT3933051074315 DOMESTIC USE Garfield County

993 Antero Resources ANT3933051074333 ANT3933051074333 DOMESTIC USE Garfield County

994 Antero Resources ANT3933051074418 ANT3933051074418 DOMESTIC USE Garfield County

995 Antero Resources ANT3933061074344 ANT3933061074344 DOMESTIC USE Garfield County

996 Antero Resources ANT3933071074210 ANT3933071074210 DOMESTIC USE Garfield County

997 Antero Resources ANT3933071074348 ANT3933071074348 DOMESTIC USE Garfield County

998 Antero Resources ANT3933081074212 ANT3933081074212 DOMESTIC USE Garfield County

999 Antero Resources ANT3933081074341 ANT3933081074341 DOMESTIC USE Garfield County

1000 Antero Resources ANT3933081074356 ANT3933081074356 DOMESTIC USE Garfield County

1001 Antero Resources ANT3933091074220 ANT3933091074220 DOMESTIC USE Garfield County

1002 Antero Resources ANT3933091074232 ANT3933091074232 DOMESTIC USE Garfield County

1003 Antero Resources ANT3933101074246 ANT3933101074246 DOMESTIC USE Garfield County

1004 Antero Resources ANT3933121074249 ANT3933121074249 DOMESTIC USE Garfield County

1005 Antero Resources ANT3933121074353 ANT3933121074353 DOMESTIC USE Garfield County

1006 Antero Resources ANT3933151074302 ANT3933151074302 DOMESTIC USE Garfield County

1007 Antero Resources ANT3933181074357 ANT3933181074357 DOMESTIC USE Garfield County

1008 Antero Resources ANT3933201074320 ANT3933201074320 DOMESTIC USE Garfield County

1009 Antero Resources ANT3933211074354 ANT3933211074354 DOMESTIC USE Garfield County

1010 Antero Resources ANT3933241074332 ANT3933241074332 DOMESTIC USE Garfield County

1011 Antero Resources ANT3933511074360 ANT3933511074360 DOMESTIC USE Garfield County

1012 Antero Resources ANT3933521074445 ANT3933521074445 DOMESTIC USE Garfield County

1013 Antero Resources ANT3933561074357 ANT3933561074357 DOMESTIC USE Garfield County
Appendix 69

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1014 Antero Resources ANT3934041074402 ANT3934041074402 DOMESTIC USE Garfield County

1015 Antero Resources ANT3934081074407 ANT3934081074407 DOMESTIC USE Garfield County

1016 Antero Resources ANT3934091074357 ANT3934091074357 DOMESTIC USE Garfield County

1017 Antero Resources ANT3934121074355 ANT3934121074355 DOMESTIC USE Garfield County

1018 Antero Resources ANT3934161074358 ANT3934161074358 DOMESTIC USE Garfield County

1019 Antero Resources ANT3934161074406 ANT3934161074406 DOMESTIC USE Garfield County

1020 Antero Resources ANT3934171074413 ANT3934171074413 DOMESTIC USE Garfield County

1021 Antero Resources ANT3934191074406 ANT3934191074406 DOMESTIC USE Garfield County

1022 Antero Resources ANT3934221074404 ANT3934221074404 DOMESTIC USE Garfield County

1023 Antero Resources ANT3934231074352 ANT3934231074352 DOMESTIC USE Garfield County

1024 Antero Resources ANT3934241074401 ANT3934241074401 DOMESTIC USE Garfield County

1025 Antero Resources ANT3934261074407 ANT3934261074407 DOMESTIC USE Garfield County

1026 EnCana Oil & Gas (USA) Inc. MINE1WW MINE1WW AGRICULTURAL USE Garfield County

1027 EnCana Oil & Gas (USA) Inc. MINE2WW MINE2WW AGRICULTURAL USE Garfield County

1028 Colorado Department of Agriculture WS-052 WS-052CDOA DOMESTIC USE Garfield County

1029 EnCana Oil & Gas (USA) Inc. NELS1WW NELS1WW DOMESTIC USE Garfield County

1030 Colorado Oil and Gas Conservation Commission 703025 COGCC Facility ID:703025 DOMESTIC USE Garfield County

1031 Colorado Oil and Gas Conservation Commission 703026 COGCC Facility ID:703026 DOMESTIC USE Garfield County

1032 Colorado Oil and Gas Conservation Commission 703027 COGCC Facility ID:703027 DOMESTIC USE Garfield County

1033 Colorado Oil and Gas Conservation Commission 703105 COGCC Facility ID:703105 DOMESTIC USE Garfield County

1034 U.S. Geological Survey 393302107242600 SC00609003DC00 OBSERVATION Garfield County

1038 U.S. Geological Survey 393000108225001 SC00609830CCB OBSERVATION Garfield County

1039 U.S. Geological Survey 400340108571101 SB00110316AAD1 DOMESTIC USE Rio Blanco County

1051 U.S. Geological Survey 400614108522701 SB00210232BCB1 OBSERVATION Rio Blanco County

1052 U.S. Geological Survey C00276 C00276 OBSERVATION Rio Blanco County

1053 U.S. Geological Survey C00277 C00277 OBSERVATION Rio Blanco County

1054 U.S. Geological Survey 400228108245400 NONE USGS 400228108245400 OBSERVATION Rio Blanco County

1055 U.S. Geological Survey 400113108274700 GEN PET 88-26

B1-99-26DDDD

OBSERVATION Rio Blanco County

1057 U.S. Geological Survey 400223108245400 TH 75-2A (B1-98-20 DBB1) OBSERVATION Rio Blanco County

1058 U.S. Geological Survey 400223108245401 TH 75-2B (B1-98-20 DBB2) OBSERVATION Rio Blanco County

1059 U.S. Geological Survey 400228108245401 SB00109820DBB OBSERVATION Rio Blanco County

1062 U.S. Geological Survey 400725108250400 BARODYANAM 72-1

B2-98-20CDBA

OBSERVATION Rio Blanco County

1064 U.S. Geological Survey C00559 C00559 OBSERVATION Rio Blanco County

1065 U.S. Geological Survey C00561 C00561 OBSERVATION Rio Blanco County

1066 U.S. Geological Survey C00564 C00564 OBSERVATION Rio Blanco County

1067 U.S. Geological Survey C00567 C00567 OBSERVATION Rio Blanco County

1068 U.S. Geological Survey 400216108154000 ALK FLAT 

S SPR B1-97-22DBCD

OBSERVATION Rio Blanco County

1069 U.S. Geological Survey 400325108152700 SUPERIOR TS-40

(B1-97-15 ADB)

OBSERVATION Rio Blanco County

1070 U.S. Geological Survey 400443108195901 SB00109801DDC1 DESTROYED Rio Blanco County

1071 U.S. Geological Survey 400019108211001 SC00109802AAB OBSERVATION Rio Blanco County

1073 U.S. Geological Survey 400103108203000 Y73-3 B1-98-36BACA OBSERVATION Rio Blanco County

1080 U.S. Geological Survey 400218108170600 TH 75-1A (B1-97-21 CAD1) OBSERVATION Rio Blanco County

1081 U.S. Geological Survey 400218108170601 SB00109721CAD OBSERVATION Rio Blanco County

1084 U.S. Geological Survey 400226108152700 SUPERIOR CH-20

B1-97-22ADCD

OBSERVATION Rio Blanco County

1085 U.S. Geological Survey 400246108200800 Y73-2 B1-98-24ABAD OBSERVATION Rio Blanco County

1091 U.S. Geological Survey 400334108150200 P73-2 B1-97-14BBD OBSERVATION Rio Blanco County

1094 U.S. Geological Survey 400400108201200 B 1N98W 13DB OBSERVATION Rio Blanco County

1095 U.S. Geological Survey 400400108201201 SB00109813DB OBSERVATION Rio Blanco County

1096 U.S. Geological Survey 400508108202000 Y73-1 B1-98-01ACCB OBSERVATION Rio Blanco County

1099 U.S. Geological Survey 400547108151801 SB00209734DAD1 DOMESTIC USE Rio Blanco County

1100 U.S. Geological Survey 400655108212900 FLOWING WELL

YC B2-98-26ACBC

OBSERVATION Rio Blanco County

1101 U.S. Geological Survey 395655107423601 SC00109222CCA1 DOMESTIC USE Rio Blanco County

1107 U.S. Geological Survey 400047108053101 SB00109531ACC1 OBSERVATION Rio Blanco County

1125 U.S. Geological Survey 400202108020101 SC00109522DCD1 DOMESTIC USE Rio Blanco County

1130 Colorado Department of Agriculture WS-026 WS-026CDOA DOMESTIC USE Rio Blanco County

1141 U.S. Geological Survey 127002 127002 OBSERVATION Rio Blanco County

1142 U.S. Geological Survey 394304108100200 TOSCO BUTTE 25 

C4-96-09ADC DUP1

OBSERVATION Rio Blanco County

1144 U.S. Geological Survey 400848107583700 JIM COOK WELL OBSERVATION Rio Blanco County
70 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1146 U.S. Geological Survey 400855107575001 SB00209417BAA1 AGRICULTURAL USE Rio Blanco County

1147 U.S. Geological Survey 400943107594701 SB00209512ABD1 DOMESTIC USE Rio Blanco County

1149 U.S. Geological Survey 401035108331701 SB00209906BBC1 AGRICULTURAL USE Rio Blanco County

1153 U.S. Geological Survey 401106108315501 SB00309932CAB1 AGRICULTURAL USE Rio Blanco County

1154 U.S. Geological Survey 401119108313201 SB00309932ACA1 AGRICULTURAL USE Rio Blanco County

1160 U.S. Geological Survey 394444108255400 ARCO-MOBIL 31-1

C3-98-31ACCD

OBSERVATION Rio Blanco County

1164 U.S. Geological Survey 400548108431801 SB00210134CBD1 DOMESTIC USE Rio Blanco County

1173 U.S. Geological Survey 126300 126300 OBSERVATION Rio Blanco County

1174 U.S. Geological Survey 395239108133900 MOBIL 54 13 C2 97

13ACCC

OBSERVATION Rio Blanco County

1175 U.S. Geological Survey 395322108104800 SC00209609CBB

MOBIL WELL

OBSERVATION Rio Blanco County

1176 Colorado Oil and Gas Conservation Commission 701448 COGCC Facility ID:701448 PUBLIC SUPPLY Rio Blanco County

1177 Colorado Oil and Gas Conservation Commission 701449 COGCC Facility ID:701449 PUBLIC SUPPLY Rio Blanco County

1178 U.S. Geological Survey 395349108112900 ELPASO N GAS

C2-96-08BADA

OBSERVATION Rio Blanco County

1182 U.S. Geological Survey 395844108084500 CO DIV WILDLIFE C1-96-10 OBSERVATION Rio Blanco County

1185 U.S. Geological Survey 395849108144700 DICK BURKE WELL

C1-97-11ACDB DUP1

OBSERVATION Rio Blanco County

1186 U.S. Geological Survey 395852108084400 L HILLS IR WELL C1-

96-10DACA

OBSERVATION Rio Blanco County

1187 U.S. Geological Survey 126120 126120 OBSERVATION Rio Blanco County

1188 U.S. Geological Survey 394751108145201 SC00309711CDD1 (W-2) OBSERVATION Rio Blanco County

1189 U.S. Geological Survey 394801108124300 ARCO AT 1 C3 96 7CAD OBSERVATION Rio Blanco County

1190 U.S. Geological Survey 394806108124301 AT-1C-3 OBSERVATION Rio Blanco County

1191 U.S. Geological Survey 394812108102101 C-B ALLUVIUM WELL A-9 OBSERVATION Rio Blanco County

1192 U.S. Geological Survey 394826108132301 32Y12 OBSERVATION Rio Blanco County

1193 U.S. Geological Survey 394826108133001 32X12 OBSERVATION Rio Blanco County

1194 U.S. Geological Survey 394828108132704 SC00309712ACB1

USGS 394828108132704

OBSERVATION Rio Blanco County

1195 U.S. Geological Survey 394836108134001 21X12-01 OBSERVATION Rio Blanco County

1196 U.S. Geological Survey 394659108112402 C-B ALLUVIUM WELL A-12 OBSERVATION Rio Blanco County

1197 U.S. Geological Survey 394711108115100 TOSCO CB-4 C3-96-17CBDD OBSERVATION Rio Blanco County

1198 U.S. Geological Survey 394749108120700 ARCO SG-11(C3-96-7DDD) OBSERVATION Rio Blanco County

1199 U.S. Geological Survey 394836108134002 21X12-2 OBSERVATION Rio Blanco County

1200 U.S. Geological Survey 394843108132701 31X12 OBSERVATION Rio Blanco County

1201 U.S. Geological Survey 394851108112800 TOSCO CB-3 C3-96-05DCBC OBSERVATION Rio Blanco County

1202 U.S. Geological Survey 394852108135800 TOSCO CB-1 C3-97-01CCAB OBSERVATION Rio Blanco County

1203 U.S. Geological Survey 394853108143600 ARCO SG-1A (C3-97-2DBD) OBSERVATION Rio Blanco County

1204 U.S. Geological Survey 394857108122100 TOSCO CB-2 C3-96-06DBDD OBSERVATION Rio Blanco County

1205 U.S. Geological Survey 394859108135100 OCCY33X-1(C3-97-1)CADA OBSERVATION Rio Blanco County

1206 U.S. Geological Survey 394900108142101 WELL 43X2-1 OBSERVATION Rio Blanco County

1207 U.S. Geological Survey 394900108142102 43X2-2 OBSERVATION Rio Blanco County

1208 U.S. Geological Survey 394903108135002 22X1-2 OBSERVATION Rio Blanco County

1209 U.S. Geological Survey 394903108135003 22X1-3 OBSERVATION Rio Blanco County

1210 U.S. Geological Survey 395012108143702 C-B ALLUVIUM WELL A-2 OBSERVATION Rio Blanco County

1211 U.S. Geological Survey 395034108135700 C-B ALLUVIUM WELL A-1 OBSERVATION Rio Blanco County

1213 U.S. Geological Survey 394824108133500 OCCY 32X-12(C3-97-12ACBB) OBSERVATION Rio Blanco County

1230 U.S. Geological Survey 395010108132901 SC00209736ACA1 OBSERVATION Rio Blanco County

1237 U.S. Geological Survey 395029108140400 P73-5 C2-97-25CCDA OBSERVATION Rio Blanco County

1239 U.S. Geological Survey 395155108123100 TH 75-10A (C2-96-19 ACBA1) OBSERVATION Rio Blanco County

1244 Colorado Department of Agriculture WS-021 WS-021CDOA DOMESTIC USE Rio Blanco County

1250 U.S. Geological Survey 400131107561400 SCHULTZ NO. 1 OBSERVATION Rio Blanco County

1251 U.S. Geological Survey 400137107574701 SB00109429BDD1 DOMESTIC USE Rio Blanco County

1252 U.S. Geological Survey 400140107570001 SB00109428ADD1 DOMESTIC USE Rio Blanco County

1253 U.S. Geological Survey 400447107550700 SULPHUR C CO WELL L OBSERVATION Rio Blanco County

1254 U.S. Geological Survey 400643107551901 SB00209427DBB1 AGRICULTURAL USE Rio Blanco County

1256 U.S. Geological Survey 400009107525801 SC00109306BBC1 DOMESTIC USE Rio Blanco County

1260 U.S. Geological Survey 400036107580301 SB00109432CBA1 AGRICULTURAL USE Rio Blanco County

1265 U.S. Geological Survey 400044107530601 SB00109436DBB1 DOMESTIC USE Rio Blanco County

1267 U.S. Geological Survey 400053107583901 SB00109431ACA1 AGRICULTURAL USE Rio Blanco County

1272 U.S. Geological Survey 400108107581901 SB00109431AAA1 DOMESTIC USE Rio Blanco County

1273 U.S. Geological Survey 400109107562101 SB00109433ABA1 OBSERVATION Rio Blanco County

1277 U.S. Geological Survey 400115107572101 SB00109429AAC1 PUBLIC SUPPLY Rio Blanco County
Appendix 71

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1282 U.S. Geological Survey 400119107525601 SB00109425DCA1 DOMESTIC USE Rio Blanco County

1297 U.S. Geological Survey 400146107552201 SB00109427ACB1 DOMESTIC USE Rio Blanco County

1302 U.S. Geological Survey 400206107580401 SB00109419DDC1 DOMESTIC USE Rio Blanco County

1305 U.S. Geological Survey 400221107552201 SB00109420BAC1 DOMESTIC USE Rio Blanco County

1306 U.S. Geological Survey 400308107583601 SB00109418DBA1 DOMESTIC USE Rio Blanco County

1307 U.S. Geological Survey 400312107584201 SB00109418DBD1 DOMESTIC USE Rio Blanco County

1317 Colorado Department of Agriculture WS-025 WS-025CDOA DOMESTIC USE Rio Blanco County

1318 Colorado Department of Agriculture WS-022 WS-022CDOA DOMESTIC USE Rio Blanco County

1321 U.S. Geological Survey 394800108051100 BEDROCK WELL 17X8-G OBSERVATION Rio Blanco County

1327 U.S. Geological Survey 400557108460801 SB00210131DBA1 OBSERVATION Rio Blanco County

1328 U.S. Geological Survey 400245108462600 S(B- 1-101)19BAD- 1 OBSERVATION Rio Blanco County

1329 U.S. Geological Survey 400245108462601 SB00110119BAD1 DOMESTIC USE Rio Blanco County

1330 U.S. Geological Survey 400330108462001 SB00110118BDA1 OBSERVATION Rio Blanco County

1333 U.S. Geological Survey 400509108475201 SB00110201BCC3 OBSERVATION Rio Blanco County

1369 U.S. Geological Survey 400545108461901 SB00210131CDA1 DOMESTIC USE Rio Blanco County

1371 U.S. Geological Survey 400547108483301 SB00210235DBC1

USGS 400547108483301

DOMESTIC USE Rio Blanco County

1381 U.S. Geological Survey 400557108462801 SB00210131CAA1 DOMESTIC USE Rio Blanco County

1382 U.S. Geological Survey 400600108445701 SB00210132ACD1 AGRICULTURAL USE Rio Blanco County

1383 U.S. Geological Survey 400601108463601 SB00210131BDC1 DOMESTIC USE Rio Blanco County

1387 U.S. Geological Survey 400108107490801 SB00109334BBB1 DOMESTIC USE Rio Blanco County

1388 U.S. Geological Survey 400152107483601 SB00109327ABC2 DOMESTIC USE Rio Blanco County

1389 U.S. Geological Survey 400202107512200 SB00109329BB OBSERVATION Rio Blanco County

1390 U.S. Geological Survey 400206107502200 SB00109320DD OBSERVATION Rio Blanco County

1391 U.S. Geological Survey 400209107502600 UNNAMED DUP26 OBSERVATION Rio Blanco County

1392 U.S. Geological Survey 400224107505900 SB00109320CA OBSERVATION Rio Blanco County

1393 U.S. Geological Survey 400318107511800 SB00109317BC OBSERVATION Rio Blanco County

1395 U.S. Geological Survey 400011107490701 SB00109303BAD1 DOMESTIC USE Rio Blanco County

1403 U.S. Geological Survey 400045107484101 SB00109334CAA2 AGRICULTURAL USE Rio Blanco County

1409 U.S. Geological Survey 400152107483501 SB00109327ABC1 OBSERVATION Rio Blanco County

1410 U.S. Geological Survey 400158107485501 SB00109327BAB1 DOMESTIC USE Rio Blanco County

1411 U.S. Geological Survey 400202107564501 SB00109330AAB1 PUBLIC SUPPLY Rio Blanco County

1415 U.S. Geological Survey 400209107521601 SB00109319CDB1 DOMESTIC USE Rio Blanco County

1416 U.S. Geological Survey 400400107485901 SC00109310CCA1 DOMESTIC USE Rio Blanco County

1418 U.S. Geological Survey 400723107504901 SB00209320DCB1 OBSERVATION Rio Blanco County

1419 Colorado Department of Agriculture WS-023 WS-023CDOA DOMESTIC USE Rio Blanco County

1420 Colorado Department of Agriculture WS-024 WS-024CDOA DOMESTIC USE Rio Blanco County

1421 U.S. Geological Survey 394142108311201 SC00409917DDC1 (B-6B) OBSERVATION Rio Blanco County

1422 U.S. Geological Survey 394959108195500 CER RB-D-02 C3-98-11CDCD OBSERVATION Rio Blanco County

1423 U.S. Geological Survey 394540108191201 TH 75-15A (C3-97-30 ACC1) OBSERVATION Rio Blanco County

1426 U.S. Geological Survey 394545108154700 CARTER-HUMBLE WILLOW

CREEK #2 C3-97-27ACA

OBSERVATION Rio Blanco County

1433 U.S. Geological Survey 394926108163900 SHELL GREENO 

4-4C3-97-04AAAC

OBSERVATION Rio Blanco County

1438 U.S. Geological Survey 395028108192700 CER RB-W-2 C2-97-30DCCB OBSERVATION Rio Blanco County

1443 U.S. Geological Survey 395105108185400 CER RB-W-3 C2-97-30AADD OBSERVATION Rio Blanco County

1445 U.S. Geological Survey 395118108220100 CER RB-W-7 C2-98-23CCDD OBSERVATION Rio Blanco County

1448 U.S. Geological Survey 395130108184000 CER RB-W-9W 

C2-97-20CCAB

OBSERVATION Rio Blanco County

1450 U.S. Geological Survey 395131108183800 CER RB-W-9E C2-97-20CBDD OBSERVATION Rio Blanco County

1452 U.S. Geological Survey 395136108183000 CER RB-W-4 C2-97-20CACA OBSERVATION Rio Blanco County

1454 U.S. Geological Survey 395136108210000 TH 75-13A (C2-98-24 CBB2) OBSERVATION Rio Blanco County

1461 U.S. Geological Survey 401040108234301 SB00209804ABB1 DOMESTIC USE Rio Blanco County

1463 U.S. Geological Survey 401148108283801 SB00309926CCA2 DOMESTIC USE Rio Blanco County

1464 U.S. Geological Survey 401148108284001 SB00309926CCA1 AGRICULTURAL USE Rio Blanco County

1465 U.S. Geological Survey C00030 C00030 OBSERVATION Rio Blanco County

1466 U.S. Geological Survey 395328108304300 GULF STANDARD 

D16 C2 99 9CABA

OBSERVATION Rio Blanco County

1467 U.S. Geological Survey 395328108304301 GULF STANDARD 

C 12 C2 99 9CABA

OBSERVATION Rio Blanco County

1468 U.S. Geological Survey 395425108300000 CAMERON 705 

C2-99-04ADDA

OBSERVATION Rio Blanco County

1469 U.S. Geological Survey 395449108300401 CA LYSIMETER-5 FT DEPTH OBSERVATION Rio Blanco County

1475 U.S. Geological Survey 395452108301401 CA RETORT WELL RAM-6A OBSERVATION Rio Blanco County

1476 U.S. Geological Survey 395452108301502 CA RETORT WELL, RAM-5A OBSERVATION Rio Blanco County

1477 U.S. Geological Survey 395530108312700 RIO BLANCO CORP D-17

(C1-99-32ABC)

OBSERVATION Rio Blanco County
72 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1478 U.S. Geological Survey 395303108300300 AMOCO CH-2A 

C2-99-09DDDD

OBSERVATION Rio Blanco County

1480 U.S. Geological Survey 395338108311900 AMOCO CH-3 C2-99-08ADBC OBSERVATION Rio Blanco County

1482 U.S. Geological Survey 395423108315500 CAMERON 703 C2-99-05 OBSERVATION Rio Blanco County

1484 U.S. Geological Survey 395425108300001 SC00209904ADD1 OBSERVATION Rio Blanco County

1486 U.S. Geological Survey 395452108301501 D-5, CA DEWATERING

WELL C1-99-33DCD

OBSERVATION Rio Blanco County

1487 U.S. Geological Survey 395453108301601 CA DEWATERING WELL

D-4 C1-99-33DCD

OBSERVATION Rio Blanco County

1488 U.S. Geological Survey 395454108301702 TRACT CA DEWATERING

WELL D2 (C1--99-33 DCAD)

OBSERVATION Rio Blanco County

1492 U.S. Geological Survey 395749108303800 CAMERON 704 C1-99-16 OBSERVATION Rio Blanco County

1497 U.S. Geological Survey 400153107433101 SB00109228BBC1 DOMESTIC USE Rio Blanco County

1498 U.S. Geological Survey 400427107424901 SB00109209BAD1 DOMESTIC USE Rio Blanco County

1499 U.S. Geological Survey 395310108050400 TH 75-9A (C2-95-8 CCA1) OBSERVATION Rio Blanco County

1502 U.S. Geological Survey 395549108060900 TH 75-4A (C1-95-31 BBAB) OBSERVATION Rio Blanco County

1506 U.S. Geological Survey C00037 C00037 OBSERVATION Rio Blanco County

1507 U.S. Geological Survey 395904108164600 SHELL 41X-9

C1-97-09AADD

OBSERVATION Rio Blanco County

1508 U.S. Geological Survey 395420108214400 SHELL 23X-2

C2-98-02CABA

OBSERVATION Rio Blanco County

1509 U.S. Geological Survey 395447108192100 USBM 0W-01 C1-97-31DCC OBSERVATION Rio Blanco County

1510 U.S. Geological Survey 395600108184600 USBM ON-01A C1-97-29BAD OBSERVATION Rio Blanco County

1512 U.S. Geological Survey 395637108211900 SB00109823DDC MMC-IRI 8 OBSERVATION Rio Blanco County

1513 U.S. Geological Survey 395637108211901 MULTI MIN WELL MMCIRI8 OBSERVATION Rio Blanco County

1514 U.S. Geological Survey 395640108174601 AMERICAN SODA MINE

WELL 21-4DX

OBSERVATION Rio Blanco County

1515 U.S. Geological Survey 395640108182901 AMERICAN SODA MINE

WELL 20-4B

OBSERVATION Rio Blanco County

1516 U.S. Geological Survey 395648108172901 AMERICAN SODA MINE

WELL 21-3U

OBSERVATION Rio Blanco County

1517 U.S. Geological Survey 395648108172902 AMERICAN SODA MINE

WELL 21-3B

OBSERVATION Rio Blanco County

1518 U.S. Geological Survey 395255108154200 TH 75-18A (C2-97-15 AAC1) OBSERVATION Rio Blanco County

1519 U.S. Geological Survey 395255108154201 SC00209715AAC OBSERVATION Rio Blanco County

1523 U.S. Geological Survey 395327108173500 HUMBLE QAL WELL

C2-97-09CBAB

OBSERVATION Rio Blanco County

1526 U.S. Geological Survey 395424108174200 CER RB-W-8 C2-97-04BCCC OBSERVATION Rio Blanco County

1530 U.S. Geological Survey 395445108173900 MARATHON #1 

C2-97-04BBBA

OBSERVATION Rio Blanco County

1532 U.S. Geological Survey 395445108174300 MARATHON 1-A

C2-97-04BBBB DUP1

OBSERVATION Rio Blanco County

1535 U.S. Geological Survey 395617108173701 AMERICAN SODA MINE

WELL 28-1

OBSERVATION Rio Blanco County

1536 U.S. Geological Survey 395630108170600 P73-4 C1-97-28ABBD OBSERVATION Rio Blanco County

1538 U.S. Geological Survey 395633108175501 AMERICAN SODA MINE

WELL 29-3

OBSERVATION Rio Blanco County

1539 U.S. Geological Survey 395648108172903 AMERICAN SODA MINE

WELL 21-3D

OBSERVATION Rio Blanco County

1539 U.S. Geological Survey 395648108172903 AMERICAN SODA MINE

WELL 21-3D

OBSERVATION Rio Blanco County

1540 U.S. Geological Survey 395649108185101 AMERICAN SODA MINE

WELL 20-10

OBSERVATION Rio Blanco County

1541 U.S. Geological Survey 395712108190201 AMERICAN SODA MINE

WELL 19-2

OBSERVATION Rio Blanco County

1542 U.S. Geological Survey 395715108170301 AMERICAN SODA MINE

WELL 21-5

OBSERVATION Rio Blanco County

1546 U.S. Geological Survey 395755108211401 TH 75-6B (C1-98-14 ADC2) OBSERVATION Rio Blanco County

1547 U.S. Geological Survey 395755108211402 SC00109814ADC2 OBSERVATION Rio Blanco County

1549 U.S. Geological Survey 395841108151000 DEAN BURKE WELL

C1-97-11CABC

OBSERVATION Rio Blanco County

1552 U.S. Geological Survey 395935108211600 Y73-4 C1-98-02DBAA OBSERVATION Rio Blanco County

1555 Colorado Oil and Gas Conservation Commission 703243 COGCC Facility ID:703243 PUBLIC SUPPLY Rio Blanco County

1558 U.S. Geological Survey 395633107462301 SC00109325ADB1 DOMESTIC USE Rio Blanco County

1559 U.S. Geological Survey 395650107461601 SC00109324DDD1 DOMESTIC USE Rio Blanco County
Appendix 73

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1560 U.S. Geological Survey 395655107465001 SC00109324CDA1 DOMESTIC USE Rio Blanco County

1561 U.S. Geological Survey 395741107474401 SC00109323ABA1 DOMESTIC USE Rio Blanco County

1565 U.S. Geological Survey 395832107483901 SC00109315AAB1 DOMESTIC USE Rio Blanco County

1566 U.S. Geological Survey 395859107491401 SC00109310CAB1 DOMESTIC USE Rio Blanco County

1567 U.S. Geological Survey 395922107493301 SC00109310BBB1 DOMESTIC USE Rio Blanco County

1568 U.S. Geological Survey 395953107495301 SC00109304DAB1 DOMESTIC USE Rio Blanco County

1571 U.S. Geological Survey 400019108112500 LITTLE HILLS HQ B1-96-32 OBSERVATION Rio Blanco County

1576 U.S. Geological Survey 400030108145000 P73-3 B1-97-35CDAB OBSERVATION Rio Blanco County

1580 U.S. Geological Survey 400033108123400 L. HILLS CAMPG. B1-96-31 OBSERVATION Rio Blanco County

1581 U.S. Geological Survey 400045108131401 TH 75-17B, CR2,

(B1-97-36 ADCC)

OBSERVATION Rio Blanco County

1587 U.S. Geological Survey 400439108141000 P73-1 B1-97-02DDDD OBSERVATION Rio Blanco County

1592 U.S. Geological Survey 400525108132601 SB00109701ABB1 DOMESTIC USE Rio Blanco County

1593 U.S. Geological Survey C00028 C00028 OBSERVATION Rio Blanco County

1594 U.S. Geological Survey 401209108011101 SB00309526BAD1 AGRICULTURAL USE Rio Blanco County

1595 U.S. Geological Survey 401038108002801 SB00309501BBB1 AGRICULTURAL USE Rio Blanco County

1596 U.S. Geological Survey 401105108002901 SB00309536CBB1 COMMERCIAL USE Rio Blanco County

1597 U.S. Geological Survey 401241108013501 SB00309523CBC1 COMMERCIAL USE Rio Blanco County

1598 U.S. Geological Survey 401305108012901 SB00309523BCA1 DOMESTIC USE Rio Blanco County

1599 U.S. Geological Survey C00795 C00795 OBSERVATION Rio Blanco County

1600 U.S. Geological Survey 126281 126281 OBSERVATION Rio Blanco County

1601 U.S. Geological Survey 126139 126139 OBSERVATION Rio Blanco County

1602 U.S. Geological Survey 395347108270000 UNNAMED DUP25 OBSERVATION Rio Blanco County

1603 U.S. Geological Survey 395516108294200 GULF STND C 4 5 C1 99 BDC OBSERVATION Rio Blanco County

1604 U.S. Geological Survey 395524108290301 RIO BLANCO CORP 

D-18 (C1-99-34A)

OBSERVATION Rio Blanco County

1605 U.S. Geological Survey 395524108290302 GULF STANDARD 

CA 3 C1 99 34 ADB

OBSERVATION Rio Blanco County

1607 U.S. Geological Survey 395238108284400 BLM QAL SSD 

C2-99-14BCDA

OBSERVATION Rio Blanco County

1609 U.S. Geological Survey 395327108232000 BLM QAL WELL 

C2-98-09DACC

OBSERVATION Rio Blanco County

1610 U.S. Geological Survey 395336108291500 AMOCO CH-4 C2-99-10ACAC OBSERVATION Rio Blanco County

1612 U.S. Geological Survey 395348108265800 OCCIDENTAL OIL 

CORP WELL

OBSERVATION Rio Blanco County

1613 U.S. Geological Survey 395439108223301 SC00209803ABD OBSERVATION Rio Blanco County

1614 U.S. Geological Survey 395439108223302 SC00209803ABD2 OBSERVATION Rio Blanco County

1617 U.S. Geological Survey 395524108290300 CAMERON 702 

C1-99-34ADBA

OBSERVATION Rio Blanco County

1622 U.S. Geological Survey 394557108225300 CARTER HUMBLE FAWN CR

2 C3 98 27BAD

OBSERVATION Rio Blanco County

1623 U.S. Geological Survey 395046108224301 SC00209827DBB1 (CER 5) OBSERVATION Rio Blanco County

1626 U.S. Geological Survey 395034108231300 CER RB-W-5 C2-98-27CCAB OBSERVATION Rio Blanco County

1628 U.S. Geological Survey 395053108223900 CER RB-W-6 C2-98-27ACDB OBSERVATION Rio Blanco County

1631 Colorado Department of Agriculture WS-M-005 WS-M-005CDOA OBSERVATION Mesa County

1632 U.S. Geological Survey 391629108540101 034 OLD SCHOOL WELL OBSERVATION Mesa County

1633 U.S. Geological Survey 391559108540001 SC00910321BBB-080Q9 OBSERVATION Mesa County

1634 U.S. Geological Survey 391630108525701 SC00910316ADD-090R5 OBSERVATION Mesa County

1635 U.S. Geological Survey 391723108570501 SC00910412BDC1 (VT1) OBSERVATION Mesa County

1636 U.S. Geological Survey 391723108572101 SC00910412BCC1 (VT2) OBSERVATION Mesa County

1639 U.S. Geological Survey 390312108290101 OBSERVATION WELL 

OMW1 AT ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1640 U.S. Geological Survey 390339108285701 COLO.R.WILDLIFE 

AREA,EAST POOL,

TEST SITE 1,(SW)

OBSERVATION Mesa County

1641 U.S. Geological Survey 390257108295301 OBSERVATION WELL OMW9, 

ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1642 U.S. Geological Survey 390303108295501 OBSERVATION WELL 

OMW10, ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1643 U.S. Geological Survey 390305108294101 OBSERVATION WELL OMW7, 

ORCHARD 

MESA W. AREA

OBSERVATION Mesa County
74 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1644 U.S. Geological Survey 390306108292801 OBSERVATION WELL OMW5, 

ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1645 U.S. Geological Survey 390307108295301 OBSERVATION WELL OMW8, 

ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1646 U.S. Geological Survey 390308108291301 OBSERVATION WELL OMW3, 

ORCHARD 

MESA W.AREA

OBSERVATION Mesa County

1647 U.S. Geological Survey 390308108292801 OBSERVATION WELL OMW6, 

ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1648 U.S. Geological Survey 390310108291301 OBSERVATION WELL 

OMW4,ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1649 U.S. Geological Survey 390317108290301 OBSERVATION WELL OMW2, 

ORCHARD 

MESA W,AREA

OBSERVATION Mesa County

1650 U.S. Geological Survey 390335108291902 COLO.R.WILDLIFE 

AREA,WEST POOL,

TEST SITE 3 (GW)

OBSERVATION Mesa County

1651 U.S. Geological Survey 390338108285102 COLO.R.WILDLIFE 

AREA,EAST POOL 

TEST SITE 2(GW)

OBSERVATION Mesa County

1652 U.S. Geological Survey 390339108285702 COLO.R.WILDLIFE 

AREA,EAST POOL,

TEST SITE 1 (GW)

OBSERVATION Mesa County

1653 U.S. Geological Survey 390339108290702 COLO.R.WILDLIFE 

AREA,WEST POOL,

TEST SITE 2 (GW)

OBSERVATION Mesa County

1654 U.S. Geological Survey 390419108294601 UD00100117ADA-300D6 OBSERVATION Mesa County

1655 Colorado Department of Agriculture WS-M-001 WS-M-001CDOA OBSERVATION Mesa County

1656 Colorado Department of Agriculture WS-M-002 WS-M-002CDOA OBSERVATION Mesa County

1657 Colorado Department of Agriculture WS-M-003 WS-M-003CDOA OBSERVATION Mesa County

1658 Colorado Department of Agriculture WS-M-004 WS-M-004CDOA OBSERVATION Mesa County

1659 Colorado Department of Agriculture WS-M-006 WS-M-006CDOA OBSERVATION Mesa County

1660 U.S. Geological Survey 391143107563001 020A CARPENTER OBSERVATION Mesa County

1661 U.S. Geological Survey 391147107581001 020B CARPENTER OBSERVATION Mesa County

1662 U.S. Geological Survey 391353107573901 021 CASTLE OBSERVATION Mesa County

1664 Colorado Oil and Gas Conservation Commission 703154 COGCC Facility ID:703154 DOMESTIC USE Mesa County

1665 Colorado Oil and Gas Conservation Commission 703155 COGCC Facility ID:703155 DOMESTIC USE Mesa County

1666 Colorado Oil and Gas Conservation Commission 704268 COGCC Facility ID:704268 DOMESTIC USE Mesa County

1667 Colorado Oil and Gas Conservation Commission 704277 COGCC Facility ID:704277 DOMESTIC USE Mesa County

1668 Colorado Oil and Gas Conservation Commission 704278 COGCC Facility ID:704278 DOMESTIC USE Mesa County

1669 Colorado Department of Agriculture WS-054 WS-054CDOA DOMESTIC USE Mesa County

1670 U.S. Geological Survey 125015 125015 OBSERVATION Mesa County

1671 U.S. Geological Survey 390210108374000 UNNAMED DUP23 OBSERVATION Mesa County

1672 U.S. Geological Survey 390614108400901 038 A SLASSON WELL OBSERVATION Mesa County

1673 U.S. Geological Survey 390620108385601 WALKER SWA CHANNEL,

SEEPAGE SITE WWC4- SW

OBSERVATION Mesa County

1674 U.S. Geological Survey 390626108391101 WALKER SWA CHANNEL,

SEEPAGE SITE WWC9- SW

OBSERVATION Mesa County

1675 U.S. Geological Survey 390630108391701 WALKER SWA CHANNEL,

SEEPAGE SITE WWC7- SW

OBSERVATION Mesa County

1676 U.S. Geological Survey 125009 125009 OBSERVATION Mesa County

1677 U.S. Geological Survey 390445108393901 UC00100222DDC-INNIS DOMESTIC USE Mesa County

1678 U.S. Geological Survey 390612108385602 WALKER SWA CHANNEL

SITE CH18 (GW)

OBSERVATION Mesa County

1679 U.S. Geological Survey 390613108384101 SC01110114AAA1

(WALKER SWA, OW22)

OBSERVATION Mesa County

1680 U.S. Geological Survey 390614108384702 SC01110114DAA1

(WALKER SWA, OW11B)

OBSERVATION Mesa County

1681 U.S. Geological Survey 390615108385602 NORTH POND SEEPAGE

SITE NP5 (GW)

OBSERVATION Mesa County

1682 U.S. Geological Survey 390618108384201 WALKER STATE WILDLIFE

AREA, WELL 12

OBSERVATION Mesa County
Appendix 75

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1683 U.S. Geological Survey 390618108385201 WALKER SWA CHANNEL,

SEEPAGE SITE WWC13B-GW

OBSERVATION Mesa County

1684 U.S. Geological Survey 390618108385601 WALKER STATE WILDLIFE

AREA, WELL 17

OBSERVATION Mesa County

1685 U.S. Geological Survey 390619108385601 WALKER STATE WILDLIFE

AREA, WELL 18

OBSERVATION Mesa County

1686 U.S. Geological Survey 390620108385002 SC01110114AAB1

(WALKER SWA, OW10B)

OBSERVATION Mesa County

1687 U.S. Geological Survey 390620108385301 WALKER STATE WILDLIFE

AREA, WELL 1

OBSERVATION Mesa County

1688 U.S. Geological Survey 390620108385302 WALKER STATE WILDLIFE

AREA, WELL 2

OBSERVATION Mesa County

1689 U.S. Geological Survey 390620108385402 WALKER SWA CHANNEL,

SEEPAGE SITE WWC2- GW

OBSERVATION Mesa County

1690 U.S. Geological Survey 390620108385602 WALKER SWA CHANNEL,

SEEPAGE SITE WWC4- GW

OBSERVATION Mesa County

1691 U.S. Geological Survey 390621108384601 WALKER STATE WILDLIFE

AREA, WELL 11

OBSERVATION Mesa County

1692 U.S. Geological Survey 390621108385701 WALKER STATE WILDLIFE

AREA, WELL 4

OBSERVATION Mesa County

1693 U.S. Geological Survey 390621108385901 WALKER SWA CHANNEL,

SEEPAGE SITE WWC15- GW

OBSERVATION Mesa County

1694 U.S. Geological Survey 390622108384901 WALKER STATE WILDLIFE

AREA, WELL 7

OBSERVATION Mesa County

1695 U.S. Geological Survey 390622108385001 WALKER STATE WILDLIFE

AREA, WELL 6

OBSERVATION Mesa County

1696 U.S. Geological Survey 390622108385102 NORTH POND SEEPAGE

TEST SITE NP2 (GW)

OBSERVATION Mesa County

1697 U.S. Geological Survey 390622108385501 WALKER STATE WILDLIFE

AREA, WELL 3

OBSERVATION Mesa County

1699 U.S. Geological Survey 390622108390201 WALKER STATE WILDLIFE

AREA, WELL 19

OBSERVATION Mesa County

1700 U.S. Geological Survey 390623108385302 NORTH POND SEEPAGE

TEST SITE NP4 (GW)

OBSERVATION Mesa County

1701 U.S. Geological Survey 390624108390201 WALKER STATE WILDLIFE

AREA, WELL 5

OBSERVATION Mesa County

1702 U.S. Geological Survey 390624108390202 WALKER SWA CHANNEL,

SEEPAGE SITE WWC5- GW

OBSERVATION Mesa County

1703 U.S. Geological Survey 390624108390801 WALKER STATE WILDLIFE

AREA, WELL 20

OBSERVATION Mesa County

1704 U.S. Geological Survey 390625108384901 WALKER STATE WILDLIFE

AREA, WELL 10

OBSERVATION Mesa County

1705 U.S. Geological Survey 390625108385301 WALKER STATE WILDLIFE

AREA, WELL 9

OBSERVATION Mesa County

1706 U.S. Geological Survey 390625108390401 WALKER STATE WILDLIFE

AREA, WELL 13

OBSERVATION Mesa County

1707 U.S. Geological Survey 390625108390403 WALKER SWA CHANNEL,

SEEPAGE SITE WWC11-GW

OBSERVATION Mesa County

1708 U.S. Geological Survey 390625108390601 WALKER SWA CHANNEL,

SEEPAGE SITE WWC6- GW

OBSERVATION Mesa County

1709 U.S. Geological Survey 390626108391102 WALKER SWA CHANNEL,

SEEPAGE SITE WWC9- GW

OBSERVATION Mesa County

1710 U.S. Geological Survey 390626108391401 WALKER STATE WILDLIFE

AREA, WELL 21

OBSERVATION Mesa County

1711 U.S. Geological Survey 390627108390001 WALKER STATE WILDLIFE

AREA, WELL 8

OBSERVATION Mesa County

1712 U.S. Geological Survey 390628108390901 WALKER STATE WILDLIFE

AREA, WELL 14

OBSERVATION Mesa County

1713 U.S. Geological Survey 390630108391702 WALKER SWA CHANNEL,

SEEPAGE SITE WWC7- GW

OBSERVATION Mesa County

1714 U.S. Geological Survey 390630108392001 WALKER SWA CHANNEL,

SEEPAGE SITE WWC19- GW

OBSERVATION Mesa County

1715 U.S. Geological Survey 390631108391501 WALKER STATE WILDLIFE

AREA, WELL 15

OBSERVATION Mesa County

1716 U.S. Geological Survey 390632108391801 WALKER STATE WILDLIFE

AREA, WELL 16

OBSERVATION Mesa County
76 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1723 U.S. Geological Survey 392132108145301 SC00809717CBA4 OBSERVATION Mesa County

1727 U.S. Geological Survey 390933108405701 035 ARS18 OBSERVATION Mesa County

1728 U.S. Geological Survey 391119108405301 036 ARS13 OBSERVATION Mesa County

1730 U.S. Geological Survey C16217 C16217 OBSERVATION Mesa County

1731 U.S. Geological Survey 390232108325201 UC00100125BCD1 DOMESTIC USE Mesa County

1732 U.S. Geological Survey 390246108340301 UC00100126BBD1 OBSERVATION Mesa County

1733 U.S. Geological Survey 390255108311201 UD00100119DCD1 AGRICULTURAL USE Mesa County

1734 U.S. Geological Survey 390301108300101 OBSERVATION WELL 

OMW13, ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1735 U.S. Geological Survey 390302108295901 OBSERVATION WELL 

OMW11, ORCHARD 

MESA W. AREA

OBSERVATION Mesa County

1736 U.S. Geological Survey 390306108295901 OBSERVATION WELL 

OMW12, ORCHARD

MESA W. AREA

OBSERVATION Mesa County

1738 U.S. Geological Survey 390328108344701 UC00100122BAA1 OBSERVATION Mesa County

1741 Colorado Department of Agriculture WS-M-007 WS-M-007CDOA OBSERVATION Mesa County

1742 Colorado Department of Agriculture WS-M-008 WS-M-008CDOA OBSERVATION Mesa County

1743 Colorado Department of Agriculture WS-M-009 WS-M-009CDOA OBSERVATION Mesa County

1744 Colorado Department of Agriculture WS-M-010 WS-M-010CDOA OBSERVATION Mesa County

1745 Colorado Oil and Gas Conservation Commission 703089 COGCC Facility ID:703089 DOMESTIC USE Mesa County

1747 U.S. Geological Survey 391853108510401 SC00810335DBD-108U0 OBSERVATION Mesa County

1752 EnCana Oil & Gas (USA) Inc. BAIL1WW BAIL1WW DOMESTIC USE Mesa County

1753 EnCana Oil & Gas (USA) Inc. BRAD1WW BRAD1WW DOMESTIC USE Mesa County

1754 EnCana Oil & Gas (USA) Inc. CROM1WW CROM1WW DOMESTIC USE Mesa County

1755 EnCana Oil & Gas (USA) Inc. HONA1WW HONA1WW DOMESTIC USE Mesa County

1756 EnCana Oil & Gas (USA) Inc. LAKE1WW LAKE1WW DOMESTIC USE Mesa County

1757 EnCana Oil & Gas (USA) Inc. MACK1WW MACK1WW DOMESTIC USE Mesa County

1758 EnCana Oil & Gas (USA) Inc. RADE1WW RADE1WW DOMESTIC USE Mesa County

1759 EnCana Oil & Gas (USA) Inc. STAN1WW STAN1WW DOMESTIC USE Mesa County

1760 EnCana Oil & Gas (USA) Inc. WHIT1WW WHIT1WW DOMESTIC USE Mesa County

1761 City of Grand Junction GWSOMR3 Sommerville Well 3 OBSERVATION Mesa County

1762 U.S. Geological Survey 385623108255401 UD00200234DBC1 OBSERVATION Mesa County

1763 U.S. Geological Survey C16582 C16582 OBSERVATION Mesa County

1765 U.S. Geological Survey 391057108484301 UB00100303CCB-130L3 OBSERVATION Mesa County

1766 U.S. Geological Survey 391203108473801 UB00200334ADD01-RW1 OBSERVATION Mesa County

1768 U.S. Geological Survey 391208108473801 UB00200334ADD03-RW3 OBSERVATION Mesa County

1769 U.S. Geological Survey 391226108472801 UB00200335BBA-143N0 OBSERVATION Mesa County

1770 U.S. Geological Survey 125788 125788 OBSERVATION Mesa County

1771 U.S. Geological Survey 390931108093601 059 HARVEY WELL OBSERVATION Mesa County

1772 U.S. Geological Survey 391059108075601 016 HIGHWAY SPRING OBSERVATION Mesa County

1773 Colorado Oil and Gas Conservation Commission 703157 COGCC Facility ID:703157 DOMESTIC USE Mesa County

1774 Colorado Oil and Gas Conservation Commission 703076 COGCC Facility ID:703076 DOMESTIC USE Mesa County

1776 Colorado Oil and Gas Conservation Commission 703090 COGCC Facility ID:703090 DOMESTIC USE Mesa County

1777 Colorado Oil and Gas Conservation Commission 703158 COGCC Facility ID:703158 DOMESTIC USE Mesa County

1778 Colorado Oil and Gas Conservation Commission 703167 COGCC Facility ID:703167 DOMESTIC USE Mesa County

1779 Colorado Oil and Gas Conservation Commission 703168 COGCC Facility ID:703168 DOMESTIC USE Mesa County

1780 Colorado Oil and Gas Conservation Commission 703170 COGCC Facility ID:703170 DOMESTIC USE Mesa County

1781 Colorado Oil and Gas Conservation Commission 703171 COGCC Facility ID:703171 DOMESTIC USE Mesa County

1782 Colorado Oil and Gas Conservation Commission 704270 COGCC Facility ID:704270 DOMESTIC USE Mesa County

1783 Colorado Oil and Gas Conservation Commission 704271 COGCC Facility ID:704271 DOMESTIC USE Mesa County

1784 Colorado Oil and Gas Conservation Commission 704272 COGCC Facility ID:704272 DOMESTIC USE Mesa County

1785 Colorado Oil and Gas Conservation Commission 704273 COGCC Facility ID:704273 DOMESTIC USE Mesa County

1786 Colorado Oil and Gas Conservation Commission 704274 COGCC Facility ID:704274 DOMESTIC USE Mesa County

1787 U.S. Geological Survey 125808 125808 OBSERVATION Mesa County

1788 EnCana Oil & Gas (USA) Inc. LIND1WW LIND1WW DOMESTIC USE Mesa County

1789 U.S. Geological Survey 125619 125619 OBSERVATION Mesa County

1790 U.S. Geological Survey 125772 125772 OBSERVATION Mesa County

1791 U.S. Geological Survey 125773 125773 OBSERVATION Mesa County

1792 U.S. Geological Survey 125774 125774 OBSERVATION Mesa County

1793 U.S. Geological Survey 125775 125775 OBSERVATION Mesa County

1794 U.S. Geological Survey 390958108071701 058 TRAHERN WELL OBSERVATION Mesa County

1795 U.S. Geological Survey 391119108031301 017 CHURCH OBSERVATION Mesa County

1796 Colorado Oil and Gas Conservation Commission 703152 COGCC Facility ID:703152 DOMESTIC USE Mesa County

1797 Colorado Oil and Gas Conservation Commission 703150 COGCC Facility ID:703150 DOMESTIC USE Mesa County

1798 Colorado Oil and Gas Conservation Commission 703151 COGCC Facility ID:703151 DOMESTIC USE Mesa County

1799 Colorado Oil and Gas Conservation Commission 703153 COGCC Facility ID:703153 DOMESTIC USE Mesa County
Appendix 77

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1800 Colorado Oil and Gas Conservation Commission 703156 COGCC Facility ID:703156 DOMESTIC USE Mesa County

1801 Colorado Oil and Gas Conservation Commission 703159 COGCC Facility ID:703159 DOMESTIC USE Mesa County

1802 Colorado Oil and Gas Conservation Commission 703172 COGCC Facility ID:703172 DOMESTIC USE Mesa County

1803 Colorado Oil and Gas Conservation Commission 703173 COGCC Facility ID:703173 DOMESTIC USE Mesa County

1804 Colorado Oil and Gas Conservation Commission 703174 COGCC Facility ID:703174 DOMESTIC USE Mesa County

1805 Colorado Oil and Gas Conservation Commission 703175 COGCC Facility ID:703175 DOMESTIC USE Mesa County

1806 Colorado Oil and Gas Conservation Commission 703176 COGCC Facility ID:703176 DOMESTIC USE Mesa County

1807 Colorado Oil and Gas Conservation Commission 703805 COGCC Facility ID:703805 DOMESTIC USE Mesa County

1807 Colorado Oil and Gas Conservation Commission 703805 COGCC Facility ID:703805 DOMESTIC USE Mesa County

1808 Colorado Oil and Gas Conservation Commission 704269 COGCC Facility ID:704269 DOMESTIC USE Mesa County

1809 Colorado Oil and Gas Conservation Commission 704275 COGCC Facility ID:704275 DOMESTIC USE Mesa County

1810 Colorado Oil and Gas Conservation Commission 704276 COGCC Facility ID:704276 DOMESTIC USE Mesa County

1811 EnCana Oil & Gas (USA) Inc. brit1ww BRIT1WW DOMESTIC USE Mesa County

1812 EnCana Oil & Gas (USA) Inc. curr2ww CURR2WW DOMESTIC USE Mesa County

1813 EnCana Oil & Gas (USA) Inc. FIFI1WW FIFI1WW DOMESTIC USE Mesa County

1814 EnCana Oil & Gas (USA) Inc. hall1ww HALL1WW DOMESTIC USE Mesa County

1815 Colorado Department of Agriculture WS-055 WS-055CDOA DOMESTIC USE Mesa County

1816 EnCana Oil & Gas (USA) Inc. HITT1WW HITT1WW DOMESTIC USE Mesa County

1817 EnCana Oil & Gas (USA) Inc. hitt2ww HITT2WW DOMESTIC USE Mesa County

1818 EnCana Oil & Gas (USA) Inc. KITC1WW KITC1WW DOMESTIC USE Mesa County

1819 Colorado Department of Agriculture WS-056 WS-056CDOA DOMESTIC USE Mesa County

1820 EnCana Oil & Gas (USA) Inc. ZENT1WW ZENT1WW DOMESTIC USE Mesa County

1821 EnCana Oil & Gas (USA) Inc. VANZ1 VANZ1 DOMESTIC USE Mesa County

1822 EnCana Oil & Gas (USA) Inc. REID1WW REID1WW DOMESTIC USE Mesa County

1827 City of Grand Junction GWSOMR1 Sommerville Well 1 OBSERVATION Mesa County

1828 City of Grand Junction GWSOMR2 Sommerville Well 2 OBSERVATION Mesa County

1829 U.S. Geological Survey 391613108434301 174R4 OBSERVATION Mesa County

1830 U.S. Geological Survey 391310107472801 023 VEGA LAKE WELL OBSERVATION Mesa County

1832 Colorado Oil and Gas Conservation Commission 703088 COGCC Facility ID:703088 DOMESTIC USE Mesa County

1833 U.S. Geological Survey 391906108161801 044 WEB PLACE WELL OBSERVATION Mesa County

1837 U.S. Geological Survey 392129108145701 SC00809717CBA8 OBSERVATION Mesa County

1842 U.S. Geological Survey 385835108260701 UC00200113CCC1 (WELL 3) OBSERVATION Mesa County

1843 U.S. Geological Survey 385918108263901 UC00200114AAC1 (WELL 5) OBSERVATION Mesa County

1845 U.S. Geological Survey 385924108314101 UD00200115BAB1 AGRICULTURAL USE Mesa County

1847 U.S. Geological Survey 385930108265701 UC00200111DCC1 (WELL6) OBSERVATION Mesa County

1855 Colorado Oil and Gas Conservation Commission 703831 COGCC Facility ID:703831 PUBLIC SUPPLY Delta County

1856 Colorado Oil and Gas Conservation Commission 703832 COGCC Facility ID:703832 PUBLIC SUPPLY Delta County

1857 Colorado Oil and Gas Conservation Commission 703839 COGCC Facility ID:703839 PUBLIC SUPPLY Delta County

1858 Colorado Oil and Gas Conservation Commission 703845 COGCC Facility ID:703845 PUBLIC SUPPLY Delta County

1859 Colorado Oil and Gas Conservation Commission 703846 COGCC Facility ID:703846 PUBLIC SUPPLY Delta County

1860 Colorado Oil and Gas Conservation Commission 703847 COGCC Facility ID:703847 PUBLIC SUPPLY Delta County

1861 Colorado Oil and Gas Conservation Commission 703856 COGCC Facility ID:703856 PUBLIC SUPPLY Delta County

1862 Colorado Oil and Gas Conservation Commission 703837 COGCC Facility ID:703837 PUBLIC SUPPLY Delta County

1863 Colorado Oil and Gas Conservation Commission 703838 COGCC Facility ID:703838 PUBLIC SUPPLY Delta County

1864 Mine Consultant DH-15-Bowie #2 DH-15-Bowie #2 OBSERVATION Delta County

1865 Mine Consultant DH-25-Bowie #2 DH-25-Bowie #2 OBSERVATION Delta County

1866 Mine Consultant DH-38-Bowie #2 DH-38-Bowie #2 OBSERVATION Delta County

1867 Mine Consultant DH-39-Bowie #2 DH-39-Bowie #2 OBSERVATION Delta County

1868 Mine Consultant DH-49-Bowie #2 DH-49-Bowie #2 OBSERVATION Delta County

1869 Mine Consultant DH-58-Bowie #2 DH-58-Bowie #2 OBSERVATION Delta County

1870 Mine Consultant DH-67B-Bowie #2 DH-67B-Bowie #2 OBSERVATION Delta County

1871 Mine Consultant AW-11-Bowie #2 AW-11-Bowie #2 OBSERVATION Delta County

1872 Mine Consultant AW-14-Bowie #2 AW-14-Bowie #2 OBSERVATION Delta County

1873 Mine Consultant AW-16-Bowie #2 AW-16-Bowie #2 OBSERVATION Delta County

1874 Mine Consultant AW-17-Bowie #2 AW-17-Bowie #2 OBSERVATION Delta County

1875 Mine Consultant AW-1-Bowie #2 AW-1-Bowie #2 OBSERVATION Delta County

1876 Mine Consultant AW-2-Bowie #2 AW-2-Bowie #2 OBSERVATION Delta County

1877 Mine Consultant AW-3-Bowie #2 AW-3-Bowie #2 OBSERVATION Delta County

1878 Mine Consultant AW-4-Bowie #2 AW-4-Bowie #2 OBSERVATION Delta County

1879 Mine Consultant AW-5-Bowie #2 AW-5-Bowie #2 OBSERVATION Delta County

1880 Mine Consultant AW-6-Bowie #2 AW-6-Bowie #2 OBSERVATION Delta County

1881 Mine Consultant AW-7-Bowie #2 AW-7-Bowie #2 OBSERVATION Delta County

1882 Mine Consultant AW-8-Bowie #2 AW-8-Bowie #2 OBSERVATION Delta County

1883 Mine Consultant AW-9-Bowie #2 AW-9-Bowie #2 OBSERVATION Delta County

1884 Mine Consultant B07-Bowie #1 B07-Bowie #1 OBSERVATION Delta County

1885 Mine Consultant MW01-Bowie #1 MW01-Bowie #1 OBSERVATION Delta County

1886 Mine Consultant MW03-Bowie #1 MW03-Bowie #1 OBSERVATION Delta County

1887 Colorado Department of Agriculture WS-063 WS-063CDOA DOMESTIC USE Delta County
78 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1888 Wright Water Engineeres, Inc, CO SG-DW1-Stevens Gulch SG-DW1-Stevens Gulch OBSERVATION Delta County

1889 Wright Water Engineeres, Inc, CO SG-DW2-Stevens Gulch SG-DW2-Stevens Gulch OBSERVATION Delta County

1890 Colorado Department of Agriculture WS-002 WS-002CDOA DOMESTIC USE Delta County

1891 U.S. Geological Survey 385530107562201 SC01309418DBA1 DOMESTIC USE Delta County

1895 U.S. Geological Survey 385612107574402 SC01309512BDC2 OBSERVATION Delta County

1896 U.S. Geological Survey 385612107574403 SC01309512BDC3 OBSERVATION Delta County

1897 U.S. Geological Survey 385612107585801 SC01309511CAD1 DOMESTIC USE Delta County

1898 U.S. Geological Survey 385615107573501 SC01309512CAA1 DOMESTIC USE Delta County

1899 U.S. Geological Survey 385617107573401 SC01309512ACC1 DOMESTIC USE Delta County

1900 U.S. Geological Survey 385617107590501 SC01309511CBA1 DOMESTIC USE Delta County

1904 U.S. Geological Survey 385644107574001 SC01309501CDD1 DOMESTIC USE Delta County

1906 U.S. Geological Survey 385714107561301 SC01209431DCB1 DOMESTIC USE Delta County

1907 U.S. Geological Survey 385720107563801 SC01309406BAC1 DOMESTIC USE Delta County

1908 U.S. Geological Survey 385755107574301 SC01209536CAB1 DOMESTIC USE Delta County

1909 Colorado Oil and Gas Conservation Commission 703857 COGCC Facility ID:703857 PUBLIC SUPPLY Delta County

1910 Colorado Oil and Gas Conservation Commission 704303 COGCC Facility ID:704303 DOMESTIC USE Delta County

1911 Wright Water Engineeres, Inc, CO SP-DW6-Spaulding Peak SP-DW6-Spaulding Peak OBSERVATION Delta County

1912 Wright Water Engineeres, Inc, CO SP-DW7-Spaulding Peak SP-DW7-Spaulding Peak OBSERVATION Delta County

1913 Colorado Department of Agriculture WS-057 WS-057CDOA DOMESTIC USE Delta County

1914 Colorado Department of Agriculture WS-058 WS-058CDOA DOMESTIC USE Delta County

1915 Wright Water Engineeres, Inc, CO SP-DW10-Spaulding 

Peak

SP-DW10-Spaulding Peak OBSERVATION Delta County

1916 Wright Water Engineeres, Inc, CO SP-DW1-Spaulding Peak SP-DW1-Spaulding Peak OBSERVATION Delta County

1917 Wright Water Engineeres, Inc, CO SP-DW2-Spaulding Peak SP-DW2-Spaulding Peak OBSERVATION Delta County

1918 Wright Water Engineeres, Inc, CO SP-DW4-Spaulding Peak SP-DW4-Spaulding Peak OBSERVATION Delta County

1919 Colorado Oil and Gas Conservation Commission 703851 COGCC Facility ID:703851 PUBLIC SUPPLY Delta County

1920 Colorado Oil and Gas Conservation Commission 703854 COGCC Facility ID:703854 PUBLIC SUPPLY Delta County

1921 Colorado Oil and Gas Conservation Commission 703855 COGCC Facility ID:703855 PUBLIC SUPPLY Delta County

1925 U.S. Geological Survey 384309108004601 SC01509528ACD-SL2 OBSERVATION Delta County

1926 U.S. Geological Survey 384313108003101 SC01509528ADD-SL1 OBSERVATION Delta County

1928 U.S. Geological Survey 384432108012901 SC01509516CCC1 AGRICULTURAL USE Delta County

1930 U.S. Geological Survey C16871 C16871 OBSERVATION Delta County

1931 U.S. Geological Survey C16875 C16875 OBSERVATION Delta County

1932 U.S. Geological Survey C16877 C16877 OBSERVATION Delta County

1937 Colorado Oil and Gas Conservation Commission 703807 COGCC Facility ID:703807 PUBLIC SUPPLY Delta County

1938 Colorado Oil and Gas Conservation Commission 703812 COGCC Facility ID:703812 PUBLIC SUPPLY Delta County

1939 Colorado Oil and Gas Conservation Commission 703820 COGCC Facility ID:703820 PUBLIC SUPPLY Delta County

1940 Wright Water Engineeres, Inc, CO SP-DW5-Spaulding Peak SP-DW5-Spaulding Peak OBSERVATION Delta County

1941 Wright Water Engineeres, Inc, CO SP-DW8-Spaulding Peak SP-DW8-Spaulding Peak OBSERVATION Delta County

1942 Wright Water Engineeres, Inc, CO SP-DW9-Spaulding Peak SP-DW9-Spaulding Peak OBSERVATION Delta County

1943 Wright Water Engineeres, Inc, CO SP-DW3-Spaulding Peak SP-DW3-Spaulding Peak OBSERVATION Delta County

1944 U.S. Geological Survey 390438107344601 SC01109129BAB1 DOMESTIC USE Delta County

1945 U.S. Geological Survey 390438107354601 SC01109130BAC1 DOMESTIC USE Delta County

1946 Colorado Oil and Gas Conservation Commission 703833 COGCC Facility ID:703833 PUBLIC SUPPLY Delta County

1947 Colorado Oil and Gas Conservation Commission 703834 COGCC Facility ID:703834 PUBLIC SUPPLY Delta County

1951 Colorado Department of Agriculture WS-068 WS-068CDOA DOMESTIC USE Delta County

1955 U.S. Geological Survey 385507107385701 SC01309215DAC1 OBSERVATION Delta County

1962 U.S. Geological Survey 385533107390401 SC01309215ABD1 OBSERVATION Delta County

1967 Colorado Oil and Gas Conservation Commission 703816 COGCC Facility ID:703816 PUBLIC SUPPLY Delta County

1968 Colorado Oil and Gas Conservation Commission 703817 COGCC Facility ID:703817 PUBLIC SUPPLY Delta County

1969 Colorado Oil and Gas Conservation Commission 703818 COGCC Facility ID:703818 PUBLIC SUPPLY Delta County

1970 Colorado Oil and Gas Conservation Commission 703819 COGCC Facility ID:703819 PUBLIC SUPPLY Delta County

1971 Colorado Oil and Gas Conservation Commission 703844 COGCC Facility ID:703844 PUBLIC SUPPLY Delta County

1972 Colorado Oil and Gas Conservation Commission 703848 COGCC Facility ID:703848 PUBLIC SUPPLY Delta County

1973 Colorado Oil and Gas Conservation Commission 703849 COGCC Facility ID:703849 PUBLIC SUPPLY Delta County

1974 Colorado Oil and Gas Conservation Commission 703852 COGCC Facility ID:703852 PUBLIC SUPPLY Delta County

1975 Wright Water Engineeres, Inc, CO DC-MW1-Dever Creek DC-MW1-Dever Creek OBSERVATION Delta County

1976 Mine Consultant DH-66-Bowie #2 DH-66-Bowie #2 OBSERVATION Delta County

1978 U.S. Geological Survey 385336108043901 SC01309625BDC1 OBSERVATION Delta County

1981 U.S. Geological Survey 384714107440301 WELL NEAR NEW 

HOTCHKISS SEWER PONDS

OBSERVATION Delta County

1982 U.S. Geological Survey 384735107434101 WELL 1A NORTH OF OLD

HOTCHKISS SEWER PONDS

OBSERVATION Delta County

1983 U.S. Geological Survey 384800107442201 SC01409325CCD1 DOMESTIC USE Delta County

1986 U.S. Geological Survey 384842107444201 T14SR93W026ADD-WELL NR

 3300 ROAD,LEROUX CREEK

DOMESTIC USE Delta County

1990 U.S. Geological Survey 384955107405601 SC01409216CCA1 DOMESTIC USE Delta County

1993 U.S. Geological Survey 385058107402602 SC01409209DBA2 DOMESTIC USE Delta County

1995 Colorado Department of Agriculture WS-001 WS-001CDOA DOMESTIC USE Delta County
Appendix 79

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No. Agency name Siteidentifier

Site

name

Well

use County

1996 Colorado Department of Agriculture WS-008 WS-008CDOA DOMESTIC USE Delta County

2001 U.S. Geological Survey 384735107470501 SC01409333ADC1 OBSERVATION Delta County

2002 U.S. Geological Survey 384801107454201 SC01409326CCC1 DOMESTIC USE Delta County

2003 U.S. Geological Survey 384809107464501 SC01409327CCC1 DOMESTIC USE Delta County

2011 U.S. Geological Survey 385215107473201 SC01409304BAD1 OBSERVATION Delta County

2012 U.S. Geological Survey 385221107500101 SC01409306BCD1 DOMESTIC USE Delta County

2013 Wright Water Engineeres, Inc, CO DC-DW1-Dever Creek DC-DW1-Dever Creek OBSERVATION Delta County

2014 Wright Water Engineeres, Inc, CO DC-DW2-Dever Creek DC-DW2-Dever Creek OBSERVATION Delta County

2015 Colorado Oil and Gas Conservation Commission 703809 COGCC Facility ID:703809 PUBLIC SUPPLY Delta County

2016 Colorado Department of Agriculture WS-059 WS-059CDOA DOMESTIC USE Delta County

2017 Colorado Department of Agriculture WS-062 WS-062CDOA DOMESTIC USE Delta County

2018 Colorado Department of Agriculture WS-061 WS-061CDOA DOMESTIC USE Delta County

2019 Colorado Department of Agriculture WS-004 WS-004CDOA DOMESTIC USE Delta County

2020 Colorado Department of Agriculture WS-005 WS-005CDOA DOMESTIC USE Delta County

2021 Colorado Department of Agriculture WS-006 WS-006CDOA DOMESTIC USE Delta County

2022 Colorado Department of Agriculture WS-007 WS-007CDOA DOMESTIC USE Delta County

2023 Colorado Department of Agriculture WS-009 WS-009CDOA DOMESTIC USE Delta County

2024 Colorado Department of Agriculture WS-011 WS-011CDOA DOMESTIC USE Delta County

2025 U.S. Forest Service 390021107505801 LEON LAKE 5 MW OBSERVATION Delta County

2027 U.S. Geological Survey 384243107573701 SC01509525DCC-B254334 OBSERVATION Delta County

2029 U.S. Geological Survey 384953107540601 SC01409416DCA1 DOMESTIC USE Delta County

2030 Colorado Department of Agriculture WS-012 WS-012CDOA DOMESTIC USE Delta County

2033 U.S. Geological Survey 385047107332801 SC01409109DAC1 DOMESTIC USE Delta County

2034 Colorado Department of Agriculture WS-003 WS-003CDOA DOMESTIC USE Delta County

2035 Colorado Department of Agriculture WS-013 WS-013CDOA DOMESTIC USE Delta County

2037 U.S. Geological Survey 390256107214001 SC01208905BAA1 DOMESTIC USE Gunnison County

2040 U.S. Geological Survey C00132 C00132 OBSERVATION Moffat County

2041 U.S. Geological Survey 383746108055601 NB05001104ADC1 DOMESTIC USE Montrose County

2044 U.S. Geological Survey 383839108013801 NB05101031ACD AGRICULTURAL USE Montrose County

2046 U.S. Geological Survey 383847108024001 NB05101136ABD-KRAMER AGRICULTURAL USE Montrose County

2046 U.S. Geological Survey 383847108024001 NB05101136ABD-KRAMER AGRICULTURAL USE Montrose County

2049 U.S. Geological Survey C16867 C16867 OBSERVATION Montrose County

2050 U.S. Geological Survey C16868 C16868 OBSERVATION Montrose County

2051 U.S. Geological Survey C16869 C16869 OBSERVATION Montrose County

2052 U.S. Geological Survey C00106 C00106 OBSERVATION Moffat County

2053 U.S. Geological Survey 384005107401001 NB05100720DBD1 OBSERVATION Montrose County

2054 U.S. Geological Survey 383126107443801 NB04900811CBD DOMESTIC USE Montrose County

2055 U.S. Geological Survey C00268 C00268 OBSERVATION Moffat County

2056 U.S. Geological Survey 383424108015801 NB05001030BAD1 DOMESTIC USE Montrose County

2058 U.S. Geological Survey 383438108025401 NB05001124DCC DOMESTIC USE Montrose County

2061 U.S. Geological Survey 383621108012001 NB05001007DDD-WEBB AGRICULTURAL USE Montrose County

2063 U.S. Geological Survey 383715108033901 NB05001111AAB1 OBSERVATION Montrose County

2064 U.S. Geological Survey C16856 C16856 OBSERVATION Montrose County

2065 U.S. Geological Survey 401545108514200 S(B- 3-102) 5ADB- 1 OBSERVATION Moffat County

2066 U.S. Geological Survey 401545108514201 SB00310205ADB1 PUBLIC SUPPLY Moffat County

2067 U.S. Geological Survey C00337 C00337 OBSERVATION Moffat County

2068 U.S. Geological Survey 401648108362701 SB00410034BBB1 DOMESTIC USE Moffat County

2069 U.S. Geological Survey C00200 C00200 OBSERVATION Moffat County

2070 U.S. Geological Survey C00204 C00204 OBSERVATION Moffat County

2071 U.S. Geological Survey 401449108540101 SB00310312ACA1 AGRICULTURAL USE Moffat County

2072 U.S. Geological Survey C00220 C00220 OBSERVATION Moffat County

2076 U.S. Geological Survey 383901107584401 NB05101027CDC1

(STOCK WELL,BANNER RD)

AGRICULTURAL USE Montrose County

2077 Colorado Oil and Gas Conservation Commission 704194 COGCC Facility ID:704194 DOMESTIC USE Gunnison County

2078 U.S. Geological Survey 401505108584201 S(B- 3-103) 5DCC- 1 OBSERVATION Moffat County

2079 U.S. Geological Survey 401505108594501 SB00310307ABA1 PUBLIC SUPPLY Moffat County

2080 U.S. Geological Survey 401506108584201 SB00310305DCC1 PUBLIC SUPPLY Moffat County

2082 U.S. Geological Survey C00251 C00251 OBSERVATION Moffat County

2083 U.S. Geological Survey 401511108042701 SB00509533CCB AGRICULTURAL USE Moffat County

2084 U.S. Geological Survey 401640108055101 SB00409531BAC OBSERVATION Moffat County

2085 U.S. Geological Survey 401825108061201 SB00409624AAD1 OBSERVATION Moffat County

2088 U.S. Geological Survey 401539108424601 SB00310103ACD1 OBSERVATION Moffat County

2089 U.S. Geological Survey C00344 C00344 OBSERVATION Moffat County

2090 U.S. Geological Survey 401509109001001 SB00310306CDC1 PUBLIC SUPPLY Moffat County

2091 U.S. Geological Survey 401517109004701 SB00310401DCA2 COMMERCIAL USE Moffat County

2094 Oxbow Mining EC-14-Elk Creek Mine EC-14-Elk Creek Mine OBSERVATION Gunnison County

2095 U.S. Geological Survey C16477 C16477 OBSERVATION Montrose County

2096 U.S. Geological Survey C16510 C16510 OBSERVATION Montrose County
80 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1 Unknown Not available –9,999 39.5 –107.766 10/2/2001 9999

2 Anvil Points Tertiary GREEN RIVER FORMATION 56 39.567 –107.999 10/7/1977 445

3 Anvil Points Unknown Not available 22 39.592 –107.978 10/30/1977 1000

4 Anvil Points Unknown Not available 22 39.592 –107.950 10/12/1977 1600

5 Anvil Points Unknown Not available 185 39.500 –107.942 10/26/2006 1050

6 Bull Fork Unknown Not available –9,999 39.665 –108.308 9/16/1977 1100

8 Bull Fork Tertiary GREEN RIVER FORMATION 22 39.647 –108.290 7/27/1982 1400

9 Bull Fork Unknown Not available –9,999 39.646 –108.264 6/2/2006 9999

13 Circle Dot Gulch Unknown Not available –9,999 39.518 –108.131 12/9/2003 9999

14 Circle Dot Gulch Unknown Not available –9,999 39.530 –108.130 12/9/2004 9999

15 Circle Dot Gulch Unknown Not available –9,999 39.528 –108.130 12/9/2003 9999

16 Circle Dot Gulch Unknown Not available –9,999 39.531 –108.129 12/9/2003 9999

17 Circle Dot Gulch Unknown Not available 35 39.519 –108.130 11/15/2006 9999

18 Circle Dot Gulch Unknown Not available 25 39.517 –108.129 11/15/2006 9999

19 Circle Dot Gulch Unknown Not available 25 39.518 –108.130 3/14/2007 9999

20 Circle Dot Gulch Unknown Not available 30 39.519 –108.130 11/15/2006 9999

21 Circle Dot Gulch Unknown Not available 30 39.519 –108.130 3/14/2007 9999

22 Circle Dot Gulch Unknown Not available 20 39.518 –108.130 11/15/2006 9999

23 Circle Dot Gulch Unknown Not available 25 39.518 –108.130 3/14/2007 9999

24 Circle Dot Gulch Unknown Not available 20 39.517 –108.130 11/15/2006 9999

25 Circle Dot Gulch Unknown Not available 25 39.518 –108.130 11/15/2006 9999

26 Circle Dot Gulch Unknown Not available 30 39.518 –108.130 11/15/2006 9999

27 Circle Dot Gulch Unknown Not available 25 39.517 –108.130 11/15/2006 9999

28 Circle Dot Gulch Unknown Not available –9,999 39.517 –108.130 11/15/2006 9999

29 Cutoff Gulch Unknown Not available –9,999 39.684 –108.157 9/15/1977 1600

30 De Beque Unknown Not available –9,999 39.371 –108.127 9/1/2005 9999

31 Desert Gulch Unknown Not available 34 39.501 –108.380 9/13/1977 1200

33 Desert Gulch Quaternary ALLUVIUM,TERRACE 70 39.503 –108.396 4/18/1979 0

34 Desert Gulch Quaternary ALLUVIUM,TERRACE 70 39.504 –108.396 4/18/1979 0

36 Desert Gulch Quaternary ALLUVIUM,FLOOD PLAIN 56 39.553 –108.488 4/18/1979 0

38 Forked Gulch Quaternary ALLUVIUM,TERRACE 22 39.578 –108.109 4/23/1979 1200

39 Forked Gulch Unknown Not available 22 39.610 –108.029 10/3/1977 920

40 Forked Gulch Unknown Not available –9,999 39.579 –108.105 3/19/2009 9999

41 Forked Gulch Unknown Not available –9,999 39.579 –108.107 3/19/2009 9999

42 Forked Gulch Unknown Not available 180 39.508 –108.000 7/11/1997 9999

43 Forked Gulch Unknown Not available 19.9 39.585 –108.121 3/26/2009 9999

44 Forked Gulch Unknown Not available 29.9 39.584 –108.116 3/26/2009 9999

45 Forked Gulch Unknown Not available 28.2 39.582 –108.110 3/19/2009 9999

46 Forked Gulch Unknown Not available 29.5 39.588 –108.041 12/22/2008 9999

47 Forked Gulch Unknown Not available 23.7 39.588 –108.059 6/19/2008 9999

48 Forked Gulch Unknown Not available 34.2 39.584 –108.084 3/30/2009 9999

49 Forked Gulch Unknown Not available 33.6 39.582 –108.094 3/30/2009 9999

50 Gibson Gulch Tertiary WASATCH FORMATION 150 39.423 –107.618 4/21/2009 1030

51 Gibson Gulch Unknown Not available –9,999 39.421 –107.505 8/6/1999 9999

52 Gibson Gulch Unknown Not available –9,999 39.473 –107.609 6/14/2007 9999

53 Gibson Gulch Unknown Not available –9,999 39.489 –107.600 3/6/2002 9999

54 Gibson Gulch Unknown Not available –9,999 39.489 –107.613 9/17/1999 9999

55 Gibson Gulch Unknown Not available –9,999 39.432 –107.559 6/9/1997 9999

56 Gibson Gulch Unknown Not available –9,999 39.426 –107.618 11/13/2002 9999

57 Gibson Gulch Unknown Not available –9,999 39.427 –107.617 11/13/2002 9999

58 Gibson Gulch Unknown Not available –9,999 39.429 –107.621 11/12/2002 9999

59 Gibson Gulch Unknown Not available –9,999 39.434 –107.620 11/13/2002 9999

60 Gibson Gulch Unknown Not available –9,999 39.441 –107.621 11/13/2002 9999

61 Gibson Gulch Unknown Not available –9,999 39.448 –107.600 4/20/2006 9999

62 Gibson Gulch Unknown Not available –9,999 39.469 –107.621 10/14/2008 9999

63 Gibson Gulch Unknown Not available –9,999 39.465 –107.621 3/4/2008 9999

64 Gibson Gulch Unknown Not available 70 39.436 –107.531 9/15/1999 9999

65 Gibson Gulch Unknown Not available –9,999 39.465 –107.622 3/4/2008 9999

66 Gibson Gulch Unknown Not available –9,999 39.466 –107.621 3/4/2008 9999

67 Gibson Gulch Unknown Not available –9,999 39.379 –107.615 1/9/2003 9999
Appendix 81

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

68 Gibson Gulch Unknown Not available –9,999 39.492 –107.592 2/16/2005 9999

69 Gibson Gulch Unknown Not available –9,999 39.466 –107.621 9/29/2008 9999

70 Gibson Gulch Unknown Not available –9,999 39.468 –107.621 9/29/2008 9999

71 Gibson Gulch Unknown Not available –9,999 39.496 –107.601 4/29/2005 9999

72 Gibson Gulch Unknown Not available –9,999 39.489 –107.598 4/29/2005 9999

73 Gibson Gulch Unknown Not available –9,999 39.492 –107.611 2/1/2005 9999

74 Gibson Gulch Unknown Not available –9,999 39.491 –107.610 4/29/2005 9999

75 Gibson Gulch Unknown Not available –9,999 39.487 –107.607 4/29/2005 9999

76 Gibson Gulch Unknown Not available –9,999 39.500 –107.575 7/21/2005 9999

77 Gibson Gulch Unknown Not available 320 39.396 –107.624 1/9/2003 9999

78 Gibson Gulch Unknown Not available 260 39.381 –107.613 1/9/2003 9999

79 Gibson Gulch Unknown Not available 15 39.416 –107.616 8/11/2004 9999

80 Gibson Gulch Unknown Not available 18 39.467 –107.620 12/1/2008 9999

81 Gibson Gulch Unknown Not available 150 39.453 –107.619 5/1/2006 9999

82 Gibson Gulch Unknown Not available 90 39.462 –107.613 6/5/2006 9999

83 Gibson Gulch Unknown Not available 140 39.459 –107.611 5/2/2006 9999

84 Gibson Gulch Unknown Not available 120 39.460 –107.610 5/1/2006 9999

85 Gibson Gulch Unknown Not available 120 39.461 –107.611 6/5/2006 9999

86 Gibson Gulch Unknown Not available 140 39.474 –107.609 12/1/2008 9999

87 Gibson Gulch Unknown Not available 98 39.456 –107.610 5/1/2006 9999

88 Gibson Gulch Unknown Not available 12 39.455 –107.611 5/1/2006 9999

89 Gibson Gulch Unknown Not available 117 39.451 –107.607 5/2/2006 9999

90 Gibson Gulch Unknown Not available –9,999 39.446 –107.619 4/28/2004 9999

91 Gibson Gulch Unknown Not available –9,999 39.396 –107.623 1/9/2003 9999

92 Gibson Gulch Unknown Not available –9,999 39.440 –107.620 5/2/2005 9999

93 Gibson Gulch Unknown Not available –9,999 39.436 –107.618 11/12/2002 9999

94 Gibson Gulch Unknown Not available –9,999 39.426 –107.617 11/13/2002 9999

95 Gibson Gulch Unknown Not available –9,999 39.427 –107.617 11/13/2002 9999

96 Gibson Gulch Unknown Not available –9,999 39.434 –107.619 11/13/2002 9999

97 Gibson Gulch Unknown Not available –9,999 39.429 –107.620 11/12/2002 9999

98 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 9/30/2008 9999

99 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 10/1/2008 9999

100 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 10/1/2008 9999

101 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 9/30/2008 9999

102 Gibson Gulch Unknown Not available –9,999 39.463 –107.621 9/30/2008 9999

103 Gibson Gulch Unknown Not available –9,999 39.463 –107.621 9/30/2008 9999

104 Gibson Gulch Unknown Not available –9,999 39.463 –107.622 9/30/2008 9999

105 Gibson Gulch Unknown Not available –9,999 39.463 –107.623 9/12/2007 9999

106 Gibson Gulch Unknown Not available –9,999 39.463 –107.621 9/30/2008 9999

107 Gibson Gulch Unknown Not available –9,999 39.464 –107.620 6/17/2008 9999

108 Gibson Gulch Unknown Not available –9,999 39.379 –107.615 1/25/2005 9999

109 Gibson Gulch Unknown Not available –9,999 39.482 –107.589 5/1/2006 9999

110 Gibson Gulch Unknown Not available –9,999 39.483 –107.589 5/1/2006 9999

111 Gibson Gulch Unknown Not available –9,999 39.448 –107.619 11/19/2002 9999

112 Gibson Gulch Unknown Not available –9,999 39.455 –107.610 7/8/2004 9999

113 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 9/30/2008 9999

114 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 9/30/2008 9999

115 Gibson Gulch Unknown Not available –9,999 39.465 –107.620 9/30/2008 9999

116 Gibson Gulch Unknown Not available –9,999 39.463 –107.621 6/12/2006 9999

117 Gibson Gulch Unknown Not available –9,999 39.465 –107.621 9/30/2008 9999

118 Gibson Gulch Unknown Not available –9,999 39.463 –107.621 6/17/2008 9999

119 Gibson Gulch Unknown Not available –9,999 39.465 –107.620 10/1/2008 9999

120 Gibson Gulch Unknown Not available –9,999 39.464 –107.621 6/17/2008 9999

121 Gibson Gulch Unknown Not available –9,999 39.465 –107.621 9/30/2008 9999

122 Gibson Gulch Unknown Not available –9,999 39.465 –107.620 9/30/2008 9999

123 Gibson Gulch Unknown Not available –9,999 39.465 –107.621 9/30/2008 9999

124 Gibson Gulch Unknown Not available –9,999 39.441 –107.620 11/13/2002 9999

125 Gibson Gulch Unknown Not available –9,999 39.380 –107.614 1/25/2005 9999

126 Gibson Gulch Unknown Not available –9,999 39.420 –107.611 5/22/2003 9999

127 Gibson Gulch Unknown Not available –9,999 39.452 –107.619 5/2/2006 9999

128 Gibson Gulch Unknown Not available –9,999 39.499 –107.591 12/1/2005 9999

129 Gibson Gulch Unknown Not available –9,999 39.499 –107.591 5/1/2006 9999

130 Gibson Gulch Unknown Not available –9,999 39.427 –107.617 1/20/2005 9999
82 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

131 Gibson Gulch Unknown Not available –9,999 39.427 –107.617 3/16/2005 9999

132 Gibson Gulch Unknown Not available –9,999 39.454 –107.623 1/24/2003 9999

133 Gibson Gulch Unknown Not available –9,999 39.455 –107.623 5/2/2006 9999

134 Gibson Gulch Unknown Not available –9,999 39.466 –107.621 4/12/2006 9999

135 Gibson Gulch Unknown Not available –9,999 39.466 –107.620 10/1/2008 9999

138 Glenwood Springs Quaternary ALLUVIUM,TERRACE –9,999 39.552 –107.334 11/16/1984 0

142 Housetop Mountain Unknown Not available 160 39.369 –108.052 10/21/1969 0

143 Housetop Mountain Unknown Not available –9,999 39.368 –108.053 9/15/2004 9999

144 Housetop Mountain Unknown Not available –9,999 39.369 –108.076 10/12/2004 9999

145 Housetop Mountain Unknown Not available 220 39.369 –108.052 6/12/1997 9999

146 Housetop Mountain Unknown Not available 100 39.372 –108.087 7/7/2006 9999

147 Housetop Mountain Unknown Not available –9,999 39.374 –108.106 6/23/2006 9999

148 Housetop Mountain Unknown Not available –9,999 39.374 –108.122 9/1/2005 9999

149 Housetop Mountain Unknown Not available –9,999 39.369 –108.087 7/6/2006 9999

150 Housetop Mountain Unknown Not available –9,999 39.371 –108.088 7/7/2006 9999

151 Housetop Mountain Unknown Not available –9,999 39.371 –108.089 7/13/2006 9999

152 Hunter Mesa Unknown Not available –9,999 39.478 –107.691 5/17/2004 9999

153 Hunter Mesa Unknown Not available –9,999 39.476 –107.657 6/12/2007 9999

154 Hunter Mesa Unknown Not available –9,999 39.464 –107.691 3/4/2003 1200

155 Hunter Mesa Unknown Not available –9,999 39.454 –107.689 3/5/2002 9999

157 Hunter Mesa Unknown Not available –9,999 39.453 –107.734 9/5/2007 9999

158 Hunter Mesa Tertiary WASATCH FORMATION 120 39.442 –107.687 4/21/2009 1400

159 Hunter Mesa Tertiary WASATCH FORMATION 180 39.453 –107.734 4/25/2009 910

161 Hunter Mesa Unknown Not available –9,999 39.441 –107.650 1/21/2003 9999

162 Hunter Mesa Tertiary WASATCH FORMATION 190 39.467 –107.639 4/23/2009 1230

163 Hunter Mesa Tertiary WASATCH FORMATION 200 39.489 –107.641 4/23/2009 930

164 Hunter Mesa Tertiary WASATCH FORMATION 495 39.489 –107.631 4/26/2009 940

165 Hunter Mesa Tertiary WASATCH FORMATION 143 39.491 –107.658 4/27/2009 1010

166 Hunter Mesa Unknown Not available –9,999 39.438 –107.658 6/4/1997 9999

167 Hunter Mesa Unknown Not available –9,999 39.480 –107.653 6/4/1997 9999

168 Hunter Mesa Unknown Not available –9,999 39.434 –107.664 9/5/2007 9999

169 Hunter Mesa Unknown Not available –9,999 39.432 –107.635 9/6/2007 1200

169 Hunter Mesa Unknown Not available –9,999 39.432 –107.635 9/6/2007 1215

170 Hunter Mesa Unknown Not available –9,999 39.483 –107.645 8/3/2005 9999

171 Hunter Mesa Unknown Not available –9,999 39.490 –107.743 7/7/2007 9999

172 Hunter Mesa Unknown Not available –9,999 39.488 –107.653 4/14/2005 9999

173 Hunter Mesa Unknown Not available –9,999 39.488 –107.665 5/5/2005 9999

174 Hunter Mesa Unknown Not available –9,999 39.451 –107.659 1/16/2003 9999

175 Hunter Mesa Unknown Not available –9,999 39.478 –107.670 7/13/2004 9999

176 Hunter Mesa Unknown Not available –9,999 39.476 –107.653 6/13/2007 9999

177 Hunter Mesa Unknown Not available –9,999 39.489 –107.669 6/14/2007 9999

178 Hunter Mesa Unknown Not available –9,999 39.489 –107.671 8/25/2004 9999

179 Hunter Mesa Unknown Not available –9,999 39.486 –107.660 9/5/2007 9999

180 Hunter Mesa Unknown Not available –9,999 39.489 –107.657 8/5/2005 9999

181 Hunter Mesa Unknown Not available –9,999 39.487 –107.664 8/25/2004 9999

182 Hunter Mesa Unknown Not available –9,999 39.425 –107.638 7/12/2007 1215

182 Hunter Mesa Unknown Not available –9,999 39.425 –107.638 7/12/2007 1200

183 Hunter Mesa Unknown Not available –9,999 39.483 –107.660 7/12/2007 9999

184 Hunter Mesa Unknown Not available –9,999 39.483 –107.657 8/31/2005 9999

185 Hunter Mesa Unknown Not available –9,999 39.430 –107.642 7/13/2007 9999

186 Hunter Mesa Unknown Not available –9,999 39.498 –107.690 9/5/2007 9999

187 Hunter Mesa Unknown Not available –9,999 39.486 –107.668 7/20/2005 1215

187 Hunter Mesa Unknown Not available –9,999 39.486 –107.668 7/20/2005 1200

188 Hunter Mesa Unknown Not available –9,999 39.409 –107.661 11/6/2003 9999

189 Hunter Mesa Unknown Not available –9,999 39.428 –107.641 6/25/2007 1215

189 Hunter Mesa Unknown Not available –9,999 39.428 –107.641 6/25/2007 1200

191 Hunter Mesa Unknown Not available –9,999 39.483 –107.664 7/13/2004 9999

192 Hunter Mesa Unknown Not available –9,999 39.464 –107.710 10/7/2002 9999

193 Hunter Mesa Unknown Not available –9,999 39.475 –107.659 7/13/2004 9999

194 Hunter Mesa Unknown Not available –9,999 39.476 –107.657 7/13/2004 9999

195 Hunter Mesa Unknown Not available –9,999 39.454 –107.699 8/8/2001 9999

196 Hunter Mesa Unknown Not available –9,999 39.486 –107.651 4/14/2005 9999

197 Hunter Mesa Unknown Not available –9,999 39.487 –107.647 9/6/2007 9999

198 Hunter Mesa Unknown Not available –9,999 39.486 –107.658 6/12/2007 9999
Appendix 83

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

199 Hunter Mesa Unknown Not available –9,999 39.477 –107.666 7/12/2007 9999

200 Hunter Mesa Unknown Not available –9,999 39.486 –107.660 6/29/2004 9999

201 Hunter Mesa Unknown Not available –9,999 39.424 –107.644 7/13/2007 1200

201 Hunter Mesa Unknown Not available –9,999 39.424 –107.644 7/13/2007 1215

202 Hunter Mesa Unknown Not available –9,999 39.480 –107.652 7/14/2004 9999

203 Hunter Mesa Unknown Not available –9,999 39.430 –107.642 7/13/2007 1215

203 Hunter Mesa Unknown Not available –9,999 39.430 –107.642 7/13/2007 1200

204 Hunter Mesa Unknown Not available –9,999 39.498 –107.652 4/7/2005 9999

205 Hunter Mesa Unknown Not available –9,999 39.413 –107.640 6/26/2007 1215

205 Hunter Mesa Unknown Not available –9,999 39.413 –107.640 6/26/2007 1200

206 Hunter Mesa Unknown Not available 500 39.406 –107.634 12/18/2002 9999

207 Hunter Mesa Unknown Not available 320 39.395 –107.625 9/15/1999 9999

208 Hunter Mesa Unknown Not available –9,999 39.467 –107.657 8/26/2004 9999

209 Hunter Mesa Unknown Not available 70 39.469 –107.687 9/16/1999 9999

211 Hunter Mesa Unknown Not available 76 39.426 –107.698 9/16/1999 9999

213 Hunter Mesa Unknown Not available –9,999 39.446 –107.657 9/15/2004 9999

214 Hunter Mesa Unknown Not available –9,999 39.474 –107.653 6/6/2006 1215

214 Hunter Mesa Unknown Not available –9,999 39.474 –107.653 6/6/2006 1200

215 Hunter Mesa Unknown Not available –9,999 39.415 –107.657 1/14/2003 9999

216 Hunter Mesa Unknown Not available –9,999 39.411 –107.639 6/23/2007 1215

216 Hunter Mesa Unknown Not available –9,999 39.411 –107.639 6/23/2007 1200

217 Hunter Mesa Unknown Not available –9,999 39.423 –107.666 1/14/2003 9999

218 Hunter Mesa Unknown Not available –9,999 39.381 –107.629 12/18/2002 9999

219 Hunter Mesa Unknown Not available –9,999 39.453 –107.739 6/22/2007 9999

220 Hunter Mesa Unknown Not available –9,999 39.492 –107.654 7/12/2007 9999

221 Hunter Mesa Unknown Not available –9,999 39.486 –107.657 8/4/2005 9999

222 Hunter Mesa Unknown Not available –9,999 39.479 –107.644 6/15/2007 9999

223 Hunter Mesa Unknown Not available 300 39.430 –107.674 9/14/1999 9999

224 Hunter Mesa Unknown Not available –9,999 39.481 –107.653 6/8/2006 9999

225 Hunter Mesa Unknown Not available –9,999 39.438 –107.634 7/8/2004 9999

226 Hunter Mesa Unknown Not available –9,999 39.465 –107.645 1/16/2008 9999

227 Hunter Mesa Unknown Not available 400 39.490 –107.661 6/30/2004 9999

228 Hunter Mesa Unknown Not available 135 39.488 –107.649 6/14/2007 1215

228 Hunter Mesa Unknown Not available 135 39.488 –107.649 6/14/2007 1200

229 Hunter Mesa Unknown Not available –9,999 39.497 –107.658 9/2/2004 9999

230 Hunter Mesa Unknown Not available –9,999 39.483 –107.645 6/14/2006 9999

231 Hunter Mesa Unknown Not available –9,999 39.451 –107.687 1/31/2002 9999

232 Hunter Mesa Unknown Not available –9,999 39.411 –107.659 11/6/2003 9999

233 Hunter Mesa Unknown Not available –9,999 39.441 –107.740 2/16/2005 9999

234 Hunter Mesa Unknown Not available –9,999 39.474 –107.678 8/8/2001 9999

235 Hunter Mesa Unknown Not available 340 39.410 –107.659 9/14/1999 9999

236 Hunter Mesa Unknown Not available 100 39.489 –107.653 3/13/2003 9999

237 Hunter Mesa Unknown Not available –9,999 39.381 –107.637 12/18/2002 9999

238 Hunter Mesa Unknown Not available –9,999 39.488 –107.652 6/19/2006 9999

239 Hunter Mesa Unknown Not available –9,999 39.446 –107.732 7/19/2004 9999

240 Hunter Mesa Unknown Not available –9,999 39.411 –107.642 12/20/2002 9999

241 Hunter Mesa Unknown Not available 180 39.410 –107.636 6/9/1997 9999

242 Hunter Mesa Unknown Not available 30 39.430 –107.635 6/9/1997 9999

243 Hunter Mesa Unknown Not available 160 39.453 –107.734 7/11/1997 9999

244 Hunter Mesa Unknown Not available 120 39.412 –107.645 1/15/2003 9999

245 Hunter Mesa Unknown Not available 5 39.440 –107.654 7/12/1997 9999

246 Hunter Mesa Unknown Not available –9,999 39.475 –107.659 6/6/2006 9999

247 Hunter Mesa Unknown Not available –9,999 39.476 –107.657 7/15/2008 9999

248 Hunter Mesa Unknown Not available –9,999 39.494 –107.645 6/14/2007 9999

249 Hunter Mesa Unknown Not available 190 39.482 –107.663 6/12/2007 9999

250 Hunter Mesa Unknown Not available –9,999 39.498 –107.630 6/29/2005 9999

251 Hunter Mesa Unknown Not available –9,999 39.495 –107.651 9/5/2007 9999

252 Hunter Mesa Unknown Not available –9,999 39.491 –107.642 6/14/2007 9999

253 Hunter Mesa Unknown Not available –9,999 39.489 –107.641 6/13/2007 9999

254 Hunter Mesa Unknown Not available –9,999 39.494 –107.657 6/25/2007 9999

255 Hunter Mesa Tertiary WASATCH FORMATION –9,999 39.487 –107.640 4/9/2004 9999

256 Hunter Mesa Tertiary WASATCH FORMATION –9,999 39.488 –107.644 4/14/2005 1215

256 Hunter Mesa Tertiary WASATCH FORMATION –9,999 39.488 –107.644 4/14/2005 1200
84 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

257 Hunter Mesa Tertiary WASATCH FORMATION 310 39.497 –107.656 4/13/2005 9999

258 Hunter Mesa Unknown Not available 172 39.470 –107.653 6/13/2007 9999

259 Hunter Mesa Tertiary WASATCH FORMATION –9,999 39.480 –107.668 6/22/2005 1215

259 Hunter Mesa Tertiary WASATCH FORMATION –9,999 39.480 –107.668 6/22/2005 1200

260 Hunter Mesa Unknown Not available 124 39.412 –107.645 6/23/2007 9999

261 Hunter Mesa Unknown Not available 260 39.449 –107.651 6/23/2007 9999

262 Hunter Mesa Unknown Not available 160 39.381 –107.638 12/18/2002 9999

263 Hunter Mesa Unknown Not available 355 39.387 –107.636 12/19/2002 9999

264 Hunter Mesa Unknown Not available 6 39.423 –107.669 6/23/2007 1200

264 Hunter Mesa Unknown Not available 6 39.423 –107.669 6/23/2007 1215

265 Hunter Mesa Unknown Not available 140 39.415 –107.663 1/28/2003 9999

266 Hunter Mesa Unknown Not available 120 39.384 –107.633 12/19/2002 9999

267 Hunter Mesa Unknown Not available –9,999 39.478 –107.670 6/8/2006 9999

268 Hunter Mesa Unknown Not available –9,999 39.467 –107.657 7/15/2008 9999

269 Hunter Mesa Unknown Not available –9,999 39.489 –107.668 9/7/2001 9999

270 Hunter Mesa Unknown Not available –9,999 39.488 –107.671 9/28/2005 9999

271 Hunter Mesa Unknown Not available –9,999 39.489 –107.668 7/5/2005 9999

272 Hunter Mesa Unknown Not available 240 39.467 –107.646 2/15/2008 9999

273 Hunter Mesa Unknown Not available 172 39.470 –107.653 7/22/2008 9999

274 Hunter Mesa Unknown Not available 172 39.470 –107.653 5/3/2005 9999

275 Hunter Mesa Unknown Not available 320 39.465 –107.650 8/29/2008 9999

276 Hunter Mesa Unknown Not available 225 39.482 –107.668 9/17/2008 9999

277 Hunter Mesa Unknown Not available 95 39.470 –107.648 9/11/2006 9999

278 Hunter Mesa Unknown Not available 185 39.486 –107.660 6/15/2006 9999

279 Hunter Mesa Unknown Not available 400 39.490 –107.660 6/15/2006 9999

280 Hunter Mesa Unknown Not available 242 39.489 –107.656 6/15/2006 9999

281 Hunter Mesa Unknown Not available 160 39.488 –107.625 4/28/2005 9999

282 Hunter Mesa Unknown Not available 300 39.476 –107.629 6/21/2006 9999

283 Hunter Mesa Unknown Not available 198 39.465 –107.645 6/21/2007 9999

284 Hunter Mesa Unknown Not available 320 39.467 –107.651 7/23/2008 9999

285 Hunter Mesa Unknown Not available 200 39.467 –107.639 1/26/2009 9999

286 Hunter Mesa Unknown Not available 310 39.464 –107.643 9/7/2006 9999

287 Hunter Mesa Unknown Not available 300 39.468 –107.632 8/28/2008 9999

288 Hunter Mesa Unknown Not available –9,999 39.441 –107.649 1/21/2003 9999

289 Hunter Mesa Unknown Not available –9,999 39.440 –107.730 2/24/2005 9999

290 Hunter Mesa Unknown Not available –9,999 39.482 –107.691 5/19/2005 9999

291 Hunter Mesa Unknown Not available –9,999 39.468 –107.738 5/24/2004 9999

292 Hunter Mesa Unknown Not available –9,999 39.457 –107.738 5/24/2004 9999

293 Hunter Mesa Unknown Not available –9,999 39.462 –107.738 5/25/2004 9999

294 Hunter Mesa Unknown Not available –9,999 39.453 –107.738 3/7/2005 9999

295 Hunter Mesa Unknown Not available –9,999 39.463 –107.741 8/24/2004 9999

296 Hunter Mesa Unknown Not available –9,999 39.403 –107.633 1/10/2003 9999

297 Hunter Mesa Unknown Not available –9,999 39.412 –107.644 1/15/2003 9999

298 Hunter Mesa Unknown Not available –9,999 39.412 –107.644 1/15/2003 9999

299 Hunter Mesa Unknown Not available –9,999 39.476 –107.652 11/29/2007 9999

300 Hunter Mesa Unknown Not available 110 39.474 –107.651 9/21/2004 9999

301 Hunter Mesa Unknown Not available 110 39.474 –107.651 9/21/2004 9999

302 Hunter Mesa Unknown Not available –9,999 39.447 –107.656 4/29/2004 9999

303 Hunter Mesa Unknown Not available –9,999 39.448 –107.649 5/12/2006 9999

304 Hunter Mesa Unknown Not available 250 39.481 –107.668 9/17/2008 9999

305 Hunter Mesa Unknown Not available 300 39.472 –107.626 5/21/2008 9999

306 Hunter Mesa Unknown Not available 290 39.471 –107.629 5/21/2008 9999

307 Hunter Mesa Unknown Not available –9,999 39.492 –107.654 6/19/2006 9999

308 Hunter Mesa Unknown Not available –9,999 39.470 –107.653 7/22/2008 9999

309 Hunter Mesa Unknown Not available –9,999 39.492 –107.691 3/17/2005 9999

310 Hunter Mesa Unknown Not available 445 39.472 –107.632 5/28/2008 9999

311 Hunter Mesa Unknown Not available –9,999 39.418 –107.654 3/17/2005 9999

312 Hunter Mesa Unknown Not available –9,999 39.441 –107.686 2/8/2005 9999

313 Hunter Mesa Unknown Not available –9,999 39.483 –107.748 11/16/2004 9999

314 Hunter Mesa Unknown Not available –9,999 39.490 –107.743 11/16/2004 9999

315 Hunter Mesa Unknown Not available 140 39.477 –107.710 10/7/2002 9999

316 Hunter Mesa Unknown Not available 140 39.438 –107.630 9/30/2004 9999

317 Hunter Mesa Unknown Not available –9,999 39.496 –107.630 3/23/2005 9999
Appendix 85

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

318 Hunter Mesa Unknown Not available –9,999 39.424 –107.643 9/11/2003 9999

319 Hunter Mesa Unknown Not available –9,999 39.480 –107.651 7/30/2008 9999

320 Hunter Mesa Unknown Not available –9,999 39.485 –107.635 6/8/2006 9999

321 Hunter Mesa Unknown Not available –9,999 39.430 –107.642 8/2/2002 9999

322 Hunter Mesa Unknown Not available 140 39.469 –107.642 8/29/2008 9999

323 Hunter Mesa Unknown Not available –9,999 39.412 –107.64 1/15/2003 9999

324 Hunter Mesa Unknown Not available –9,999 39.492 –107.651 6/8/2006 9999

325 Hunter Mesa Unknown Not available –9,999 39.422 –107.634 3/8/2005 9999

326 Hunter Mesa Unknown Not available –9,999 39.421 –107.634 3/8/2005 9999

327 Hunter Mesa Unknown Not available 300 39.465 –107.631 8/28/2008 9999

328 Hunter Mesa Unknown Not available 110 39.474 –107.651 7/15/2008 9999

329 Hunter Mesa Unknown Not available –9,999 39.397 –107.635 1/25/2005 9999

330 Hunter Mesa Unknown Not available –9,999 39.398 –107.626 12/19/2002 9999

331 Hunter Mesa Unknown Not available –9,999 39.387 –107.635 12/19/2002 9999

332 Hunter Mesa Unknown Not available 180 39.488 –107.664 6/15/2006 9999

333 Hunter Mesa Unknown Not available 180 39.468 –107.652 7/23/2008 9999

334 Hunter Mesa Unknown Not available –9,999 39.486 –107.656 6/20/2006 9999

335 Hunter Mesa Unknown Not available –9,999 39.431 –107.634 12/20/2005 9999

336 Hunter Mesa Unknown Not available –9,999 39.431 –107.634 12/20/2005 9999

337 Hunter Mesa Unknown Not available –9,999 39.448 –107.658 1/17/2003 9999

338 Hunter Mesa Unknown Not available –9,999 39.415 –107.657 1/14/2003 9999

339 Hunter Mesa Unknown Not available –9,999 39.481 –107.658 6/8/2006 9999

340 Hunter Mesa Unknown Not available –9,999 39.411 –107.638 1/15/2003 9999

341 Hunter Mesa Unknown Not available –9,999 39.483 –107.749 7/15/2004 9999

342 Hunter Mesa Unknown Not available –9,999 39.464 –107.661 7/13/2004 9999

343 Hunter Mesa Unknown Not available –9,999 39.455 –107.659 7/13/2004 9999

344 Hunter Mesa Unknown Not available –9,999 39.488 –107.651 6/14/2006 9999

345 Hunter Mesa Unknown Not available –9,999 39.484 –107.651 8/22/2008 9999

346 Hunter Mesa Unknown Not available –9,999 39.486 –107.664 6/26/2006 9999

347 Hunter Mesa Unknown Not available –9,999 39.439 –107.649 1/23/2003 9999

348 Hunter Mesa Unknown Not available –9,999 39.478 –107.657 7/13/2004 9999

349 Hunter Mesa Unknown Not available –9,999 39.433 –107.657 1/31/2003 9999

350 Hunter Mesa Unknown Not available –9,999 39.434 –107.664 1/31/2003 9999

351 Hunter Mesa Unknown Not available –9,999 39.487 –107.672 9/3/2004 9999

352 Hunter Mesa Unknown Not available –9,999 39.440 –107.646 10/25/2004 9999

353 Hunter Mesa Unknown Not available –9,999 39.479 –107.644 3/7/2003 9999

354 Hunter Mesa Unknown Not available –9,999 39.477 –107.660 7/22/2008 9999

355 Hunter Mesa Unknown Not available –9,999 39.478 –107.657 7/22/2008 9999

356 Hunter Mesa Unknown Not available –9,999 39.430 –107.641 8/2/2002 9999

357 Hunter Mesa Unknown Not available –9,999 39.498 –107.689 6/13/2003 9999

358 Hunter Mesa Unknown Not available –9,999 39.498 –107.689 9/23/2004 9999

359 Hunter Mesa Unknown Not available –9,999 39.467 –107.646 9/16/2008 9999

360 Hunter Mesa Unknown Not available –9,999 39.467 –107.646 9/26/2008 9999

361 Hunter Mesa Unknown Not available –9,999 39.486 –107.667 6/19/2006 9999

362 Hunter Mesa Unknown Not available –9,999 39.425 –107.640 7/1/2003 9999

363 Hunter Mesa Unknown Not available –9,999 39.474 –107.652 12/1/2004 9999

364 Hunter Mesa Unknown Not available –9,999 39.474 –107.652 6/6/2006 9999

365 Hunter Mesa Unknown Not available –9,999 39.494 –107.644 6/7/2006 9999

366 Hunter Mesa Unknown Not available –9,999 39.433 –107.671 12/9/2002 9999

367 Hunter Mesa Unknown Not available –9,999 39.423 –107.668 1/28/2003 9999

368 Hunter Mesa Unknown Not available –9,999 39.415 –107.663 1/28/2003 9999

369 Hunter Mesa Unknown Not available –9,999 39.478 –107.690 10/16/2008 9999

370 Hunter Mesa Unknown Not available –9,999 39.444 –107.627 5/9/2003 9999

371 Hunter Mesa Unknown Not available –9,999 39.427 –107.636 1/16/2003 9999

372 Hunter Mesa Unknown Not available –9,999 39.457 –107.656 11/18/2004 9999

373 Hunter Mesa Unknown Not available –9,999 39.409 –107.660 11/6/2003 9999

374 Hunter Mesa Unknown Not available –9,999 39.468 –107.739 2/16/2005 9999

375 Hunter Mesa Unknown Not available –9,999 39.384 –107.632 12/19/2002 9999

376 Hunter Mesa Unknown Not available –9,999 39.497 –107.655 6/19/2006 9999

377 Hunter Mesa Unknown Not available –9,999 39.495 –107.650 6/19/2006 9999

378 Hunter Mesa Unknown Not available –9,999 39.452 –107.699 8/8/2001 9999

379 Hunter Mesa Unknown Not available –9,999 39.480 –107.749 8/11/2005 9999

380 Hunter Mesa Unknown Not available –9,999 39.464 –107.643 8/28/2008 9999

381 Hunter Mesa Unknown Not available –9,999 39.486 –107.651 3/11/2003 9999
86 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

382 Hunter Mesa Unknown Not available –9,999 39.484 –107.691 6/23/2004 9999

383 Hunter Mesa Unknown Not available –9,999 39.485 –107.651 6/19/2006 9999

384 Hunter Mesa Unknown Not available –9,999 39.428 –107.641 8/20/2002 9999

385 Hunter Mesa Unknown Not available –9,999 39.437 –107.729 2/24/2005 9999

386 Hunter Mesa Unknown Not available –9,999 39.447 –107.723 5/16/2005 9999

387 Hunter Mesa Unknown Not available –9,999 39.379 –107.632 3/3/2005 9999

388 Hunter Mesa Unknown Not available –9,999 39.381 –107.628 12/18/2002 9999

389 Hunter Mesa Unknown Not available –9,999 39.380 –107.630 2/24/2005 9999

390 Hunter Mesa Unknown Not available –9,999 39.380 –107.630 7/31/2006 9999

391 Hunter Mesa Unknown Not available –9,999 39.491 –107.658 6/15/2006 9999

392 Hunter Mesa Unknown Not available –9,999 39.491 –107.642 7/6/2006 9999

393 Hunter Mesa Unknown Not available –9,999 39.483 –107.660 2/7/2005 9999

394 Hunter Mesa Unknown Not available –9,999 39.459 –107.648 4/5/2006 9999

395 Hunter Mesa Unknown Not available –9,999 39.482 –107.662 6/7/2006 9999

396 Hunter Mesa Unknown Not available –9,999 39.483 –107.663 1/25/2006 9999

397 Hunter Mesa Unknown Not available –9,999 39.453 –107.733 12/9/2004 9999

398 Hunter Mesa Unknown Not available –9,999 39.464 –107.701 9/11/2003 9999

399 Hunter Mesa Unknown Not available –9,999 39.432 –107.680 8/11/2004 9999

400 Hunter Mesa Unknown Not available –9,999 39.434 –107.673 8/11/2004 9999

401 Hunter Mesa Unknown Not available –9,999 39.488 –107.643 6/20/2006 9999

402 Hunter Mesa Unknown Not available –9,999 39.489 –107.640 6/7/2006 9999

403 Hunter Mesa Unknown Not available –9,999 39.406 –107.633 12/18/2002 9999

404 Hunter Mesa Unknown Not available –9,999 39.426 –107.641 1/16/2003 9999

405 Hunter Mesa Unknown Not available –9,999 39.424 –107.659 2/4/2003 9999

406 Hunter Mesa Unknown Not available –9,999 39.488 –107.635 6/14/2006 9999

407 Hunter Mesa Unknown Not available –9,999 39.445 –107.657 1/30/2003 9999

408 Long Point Quaternary ALLUVIUM,TERRACE 61 39.375 –108.260 4/19/1979 0

409 Long Point Unknown Not available 61 39.378 –108.361 9/6/1977 1200

410 Long Point Quaternary ALLUVIUM,TERRACE 70 39.398 –108.269 4/19/1979 0

414 Long Point Unknown Not available 56 39.483 –108.323 9/6/1977 940

415 Long Point Quaternary ALLUVIUM,TERRACE 56 39.483 –108.328 4/25/1979 1100

416 Long Point Quaternary ALLUVIUM,TERRACE 56 39.490 –108.321 4/25/1979 1000

417 Long Point Quaternary ALLUVIUM,TERRACE 56 39.495 –108.370 4/18/1979 0

418 McCarthy Gulch Unknown Not available –9999 39.682 –108.103 9/13/1977 1300

419 McCarthy Gulch Tertiary GREEN RIVER FORMATION 22 39.643 –108.007 10/27/1977 1630

420 Mount Blaine Unknown Not available 56 39.502 –108.322 9/6/1977 1010

428 New Castle Unknown Not available –9,999 39.506 –107.601 4/20/2005 9999

429 New Castle Unknown Not available –9,999 39.588 –107.544 6/2/1997 9999

430 New Castle Unknown Not available –9,999 39.559 –107.561 8/10/2006 9999

432 New Castle Unknown Not available –9,999 39.560 –107.577 6/4/1997 9999

433 New Castle Unknown Not available –9,999 39.512 –107.535 6/4/1997 9999

434 New Castle Unknown Not available –9,999 39.501 –107.584 6/17/2005 9999

435 New Castle Unknown Not available –9,999 39.506 –107.597 6/17/2005 9999

436 New Castle Unknown Not available –9,999 39.506 –107.621 4/19/2005 9999

437 New Castle Unknown Not available 150 39.504 –107.613 9/17/1999 9999

438 New Castle Unknown Not available 120 39.604 –107.552 6/3/1997 9999

439 New Castle Unknown Not available –9,999 39.515 –107.616 6/22/2004 9999

440 New Castle Unknown Not available 165 39.614 –107.549 9/14/1999 9999

441 New Castle Unknown Not available 210 39.559 –107.599 8/10/2006 9999

442 New Castle Unknown Not available –9,999 39.516 –107.623 7/12/2007 9999

443 New Castle Tertiary WASATCH FORMATION 140 39.503 –107.622 12/4/2007 9999

444 New Castle Unknown Not available –9,999 39.508 –107.604 4/20/2005 9999

445 New Castle Unknown Not available –9,999 39.557 –107.619 5/10/2005 9999

446 New Castle Unknown Not available –9,999 39.561 –107.569 8/3/2006 9999

447 New Castle Unknown Not available –9,999 39.561 –107.563 8/3/2006 1215

447 New Castle Unknown Not available –9,999 39.561 –107.563 8/3/2006 1200

448 New Castle Unknown Not available –9,999 39.561 –107.572 8/4/2006 1215

448 New Castle Unknown Not available –9,999 39.561 –107.572 8/4/2006 1200

449 New Castle Unknown Not available 168 39.556 –107.623 8/14/2006 9999

450 New Castle Unknown Not available 230 39.558 –107.574 8/7/2006 9999

451 New Castle Unknown Not available 130 39.557 –107.579 8/7/2006 9999

452 New Castle Unknown Not available 117 39.557 –107.602 8/8/2006 9999

453 New Castle Unknown Not available 275 39.559 –107.599 8/8/2006 1215
Appendix 87

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

453 New Castle Unknown Not available 275 39.559 –107.599 8/8/2006 1200

454 New Castle Unknown Not available 110 39.558 –107.610 8/1/2006 1215

454 New Castle Unknown Not available 110 39.558 –107.610 8/1/2006 1200

455 New Castle Unknown Not available –9,999 39.56 –107.62 8/12/1998 9999

456 New Castle Unknown Not available –9,999 39.55 –107.59 8/12/1998 9999

457 North Mamm Peak Unknown Not available –9,999 39.485 –107.868 10/23/1997 9999

458 North Mamm Peak Unknown Not available –9,999 39.499 –107.864 10/23/1997 9999

459 North Mamm Peak Unknown Not available –9,999 39.497 –107.863 10/23/1997 9999

460 North Mamm Peak Unknown Not available –9,999 39.487 –107.772 4/19/2004 9999

461 North Mamm Peak Unknown Not available –9,999 39.483 –107.750 7/9/2002 9999

462 North Mamm Peak Unknown Not available –9,999 39.475 –107.777 6/25/2007 9999

463 North Mamm Peak Unknown Not available –9,999 39.475 –107.782 3/4/2002 9999

464 North Mamm Peak Unknown Not available –9,999 39.487 –107.772 3/4/2002 9999

465 North Mamm Peak Cretaceous MESAVERDE GROUP –9,999 39.480 –107.868 4/18/1986 1300

466 North Mamm Peak Unknown Not available –9,999 39.499 –107.862 6/12/1998 9999

468 North Mamm Peak Unknown Not available –9,999 39.479 –107.874 10/23/1997 9999

469 North Mamm Peak Unknown Not available –9,999 39.498 –107.761 5/11/2004 9999

470 North Mamm Peak Unknown Not available –9,999 39.457 –107.782 7/19/2004 9999

471 North Mamm Peak Unknown Not available –9,999 39.484 –107.762 4/6/2004 9999

472 North Mamm Peak Unknown Not available –9,999 39.476 –107.779 6/8/2004 9999

473 North Mamm Peak Unknown Not available –9,999 39.498 –107.762 10/2/2001 9999

474 North Mamm Peak Unknown Not available –9,999 39.497 –107.762 10/2/2001 9999

475 North Mamm Peak Unknown Not available –9,999 39.492 –107.773 10/2/2001 9999

476 North Mamm Peak Unknown Not available –9,999 39.483 –107.765 7/6/2007 9999

477 North Mamm Peak Unknown Not available –9,999 39.465 –107.779 6/8/2004 9999

478 North Mamm Peak Unknown Not available –9,999 39.499 –107.772 3/23/2004 9999

479 North Mamm Peak Unknown Not available –9,999 39.479 –107.769 1/30/2004 9999

480 North Mamm Peak Unknown Not available –9,999 39.481 –107.872 4/27/2001 9999

481 North Mamm Peak Unknown Not available –9,999 39.486 –107.771 4/8/2004 9999

482 North Mamm Peak Unknown Not available –9,999 39.491 –107.767 4/8/2004 9999

483 North Mamm Peak Unknown Not available –9,999 39.488 –107.770 4/7/2004 9999

484 North Mamm Peak Unknown Not available –9,999 39.464 –107.783 7/21/2005 9999

485 North Mamm Peak Unknown Not available –9,999 39.468 –107.783 12/29/2004 9999

486 North Mamm Peak Unknown Not available –9,999 39.470 –107.779 3/26/2003 9999

487 North Mamm Peak Unknown Not available –9,999 39.455 –107.781 11/17/2005 9999

488 North Mamm Peak Unknown Not available 102 39.495 –107.865 7/8/1997 9999

489 North Mamm Peak Unknown Not available 120 39.483 –107.873 10/22/1997 9999

490 North Mamm Peak Unknown Not available 140 39.485 –107.873 10/23/1997 9999

491 North Mamm Peak Unknown Not available 300 39.471 –107.768 6/14/2001 9999

492 North Mamm Peak Unknown Not available –9,999 39.489 –107.754 7/22/2004 9999

493 North Mamm Peak Tertiary WASATCH FORMATION 100 39.491 –107.754 6/21/2007 9999

494 North Mamm Peak Unknown Not available 282 39.500 –107.766 9/28/2001 9999

495 North Mamm Peak Unknown Not available 300 39.473 –107.768 1/31/2002 9999

496 North Mamm Peak Unknown Not available –9,999 39.488 –107.763 4/6/2004 9999

497 North Mamm Peak Unknown Not available –9,999 39.483 –107.776 5/17/2004 9999

498 North Mamm Peak Unknown Not available –9,999 39.494 –107.765 4/20/2004 9999

499 North Mamm Peak Unknown Not available –9,999 39.491 –107.763 4/6/2004 9999

500 North Mamm Peak Unknown Not available –9,999 39.499 –107.771 3/23/2004 9999

501 North Mamm Peak Tertiary WASATCH FORMATION 160 39.477 –107.860 2/3/2004 9999

502 North Mamm Peak Unknown Not available 235 39.500 –107.824 1/9/2008 9999

503 North Mamm Peak Unknown Not available 180 39.477 –107.834 7/16/2008 9999

504 North Mamm Peak Unknown Not available 100 39.491 –107.752 11/20/2008 9999

505 North Mamm Peak Unknown Not available 180 39.457 –107.781 6/6/2008 9999

506 North Mamm Peak Unknown Not available –9,999 39.486 –107.771 4/8/2004 9999

507 North Mamm Peak Unknown Not available –9,999 39.480 –107.782 7/20/2004 9999

508 North Mamm Peak Unknown Not available –9,999 39.481 –107.773 6/8/2004 9999

509 North Mamm Peak Unknown Not available –9,999 39.497 –107.783 7/21/2004 9999

510 North Mamm Peak Unknown Not available –9,999 39.500 –107.784 7/14/2006 9999

511 North Mamm Peak Unknown Not available –9,999 39.491 –107.767 4/8/2004 9999

512 North Mamm Peak Unknown Not available –9,999 39.483 –107.764 7/14/2004 9999

513 North Mamm Peak Unknown Not available –9,999 39.488 –107.770 2/6/2007 9999

514 North Mamm Peak Unknown Not available 180 39.480 –107.770 4/14/2003 9999

515 North Mamm Peak Unknown Not available –9,999 39.465 –107.778 12/3/2008 9999

516 North Mamm Peak Unknown Not available –9,999 39.499 –107.772 3/23/2004 9999

517 North Mamm Peak Unknown Not available –9,999 39.476 –107.772 7/20/2004 9999

518 North Mamm Peak Unknown Not available –9,999 39.464 –107.783 12/3/2008 9999
88 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

519 North Mamm Peak Unknown Not available –9,999 39.468 –107.782 12/3/2008 9999

520 North Mamm Peak Unknown Not available –9,999 39.498 –107.760 4/13/2009 9999

521 North Mamm Peak Unknown Not available –9,999 39.488 –107.758 4/20/2005 9999

522 North Mamm Peak Unknown Not available –9,999 39.497 –107.761 3/24/2005 9999

523 North Mamm Peak Unknown Not available –9,999 39.473 –107.857 6/16/2005 9999

524 North Mamm Peak Unknown Not available –9,999 39.477 –107.781 7/14/2004 9999

525 North Mamm Peak Unknown Not available –9,999 39.484 –107.761 4/6/2004 9999

526 North Mamm Peak Unknown Not available –9,999 39.455 –107.781 5/11/2006 9999

527 North Mamm Peak Unknown Not available –9,999 39.476 –107.778 11/20/2008 9999

528 North Mamm Peak Unknown Not available –9,999 39.488 –107.762 4/6/2004 9999

529 North Mamm Peak Unknown Not available –9,999 39.492 –107.772 11/20/2008 9999

530 North Mamm Peak Unknown Not available –9,999 39.477 –107.799 6/7/2006 9999

531 North Mamm Peak Unknown Not available –9,999 39.499 –107.762 10/2/2001 9999

532 North Mamm Peak Unknown Not available –9,999 39.488 –107.766 4/26/2003 9999

533 North Mamm Peak Unknown Not available –9,999 39.482 –107.776 6/8/2004 9999

534 North Mamm Peak Unknown Not available –9,999 39.486 –107.867 12/22/2004 9999

535 North Mamm Peak Unknown Not available –9,999 39.491 –107.866 12/22/2004 9999

536 North Mamm Peak Unknown Not available –9,999 39.483 –107.776 2/19/2009 9999

537 North Mamm Peak Unknown Not available –9,999 39.495 –107.764 9/1/2005 9999

538 North Mamm Peak Unknown Not available –9,999 39.497 –107.761 10/2/2001 9999

539 North Mamm Peak Unknown Not available –9,999 39.491 –107.762 11/20/2008 9999

540 North Mamm Peak Unknown Not available –9,999 39.495 –107.767 5/23/2005 9999

541 North Mamm Peak Unknown Not available –9,999 39.472 –107.767 6/8/2004 9999

542 North Mamm Peak Unknown Not available –9,999 39.499 –107.770 3/23/2004 9999

543 North Mamm Peak Unknown Not available –9,999 39.462 –107.780 12/3/2008 9999

544 Parachute Unknown Not available –9,999 39.444 –108.016 8/3/1978 0

558 Parachute Quaternary ALLUVIUM,TERRACE 152 39.466 –108.076 4/23/1979 0

559 Parachute Quaternary ALLUVIUM,TERRACE 152 39.470 –108.080 4/24/1979 930

560 Parachute Unknown Not available 56 39.476 –108.098 3/20/1969 0

561 Parachute Unknown Not available 56 39.477 –108.095 3/20/1969 0

562 Parachute Unknown Not available –9,999 39.411 –108.092 8/5/1999 9999

563 Parachute Unknown Not available –9,999 39.459 –108.067 6/11/1998 9999

564 Parachute Unknown Not available 56 39.483 –108.099 3/20/1969 0

565 Parachute Unknown Not available 56 39.483 –108.095 3/20/1969 0

566 Parachute Unknown Not available 180 39.489 –108.005 3/26/1969 0

569 Parachute Unknown Not available 56 39.493 –108.124 3/20/1969 0

570 Parachute Unknown Not available –9,999 39.483 –108.100 6/12/1997 9999

571 Parachute Unknown Not available –9,999 39.465 –108.077 6/12/1997 9999

572 Parachute Unknown Not available 60 39.457 –108.064 6/11/1998 9999

573 Parachute Unknown Not available 150 39.467 –108.009 6/10/1998 9999

574 Parachute Unknown Not available 170 39.467 –108.009 9/17/1999 9999

575 Parachute Unknown Not available –9,999 39.396 –108.100 11/13/2006 9999

576 Parachute Unknown Not available 70 39.383 –108.078 6/12/1997 9999

577 Parachute Unknown Not available 87 39.432 –108.023 6/12/1997 9999

578 Parachute Unknown Not available 220 39.443 –108.017 6/12/1997 9999

579 Parachute Unknown Not available –9,999 39.445 –108.008 7/5/2006 9999

580 Parachute Unknown Not available 75 39.427 –108.018 7/9/1997 9999

581 Parachute Unknown Not available –9,999 39.427 –108.026 7/14/2009 1335

582 Parachute Unknown Not available –9,999 39.428 –108.029 7/14/2009 1058

583 Parachute Unknown Not available –9,999 39.430 –108.019 7/16/2009 856

584 Parachute Unknown Not available –9,999 39.430 –108.024 7/15/2009 1337

585 Parachute Unknown Not available –9,999 39.430 –108.014 7/16/2009 932

586 Parachute Unknown Not available –9,999 39.430 –108.027 7/14/2009 1155

587 Parachute Unknown Not available –9,999 39.431 –108.020 7/15/2009 951

588 Parachute Unknown Not available –9,999 39.431 –108.019 7/15/2009 1129

589 Parachute Unknown Not available –9,999 39.431 –108.023 7/15/2009 1223

590 Parachute Unknown Not available –9,999 39.431 –108.029 7/14/2009 1010

591 Parachute Unknown Not available –9,999 39.432 –108.029 7/14/2009 929

592 Parachute Unknown Not available –9,999 39.433 –108.026 7/16/2009 1330

593 Parachute Unknown Not available –9,999 39.434 –108.028 7/15/2009 850

594 Parachute Unknown Not available –9,999 39.434 –108.029 7/15/2009 1058

595 Parachute Unknown Not available –9,999 39.434 –108.031 7/14/2009 840

596 Parachute Unknown Not available –9,999 39.440 –108.015 7/16/2009 1027

597 Parachute Unknown Not available –9,999 39.443 –108.014 7/16/2009 1119

598 Parachute Unknown Not available –9,999 39.444 –108.016 7/16/2009 1204

599 Parachute Unknown Not available 340 39.377 –108.058 7/13/2007 9999
Appendix 89

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

600 Parachute Unknown Not available 200 39.378 –108.068 7/13/2007 9999

601 Parachute Unknown Not available 112 39.438 –108.012 5/1/2007 9999

602 Parachute Unknown Not available –9,999 39.376 –108.092 7/7/2006 9999

603 Parachute Unknown Not available –9,999 39.437 –108.000 12/5/2008 9999

604 Parachute Unknown Not available –9,999 39.378 –108.109 6/23/2006 9999

605 Parachute Unknown Not available –9,999 39.403 –108.108 10/19/2006 9999

606 Parachute Unknown Not available –9,999 39.403 –108.107 10/19/2006 9999

607 Parachute Unknown Not available –9,999 39.385 –108.059 4/28/2006 9999

608 Parachute Unknown Not available –9,999 39.445 –108.006 9/17/2008 9999

609 Parachute Unknown Not available –9,999 39.430 –108.014 11/8/2007 9999

610 Parachute Unknown Not available –9,999 39.440 –108.015 6/29/2006 9999

611 Parachute Unknown Not available –9,999 39.443 –108.014 6/30/2006 9999

612 Parachute Unknown Not available –9,999 39.444 –108.015 7/5/2006 9999

613 Parachute Unknown Not available –9,999 39.442 –108.015 7/6/2006 9999

614 Parachute Unknown Not available –9,999 39.444 –108.016 6/29/2006 9999

615 Parachute Unknown Not available –9,999 39.48 –108.1 8/12/1998 9999

616 Rifle Unknown Not available –9,999 39.504 –107.822 8/30/1999 9999

617 Rifle Unknown Not available –9,999 39.504 –107.823 8/30/1999 9999

623 Rifle Tertiary WASATCH FORMATION 200 39.544 –107.753 4/24/2009 1620

624 Rifle Tertiary WASATCH FORMATION 110 39.554 –107.766 4/26/2009 1240

625 Rifle Unknown Not available –9,999 39.559 –107.760 8/15/2006 9999

626 Rifle Unknown Not available –9,999 39.536 –107.756 7/7/1997 9999

627 Rifle Tertiary WASATCH FORMATION 100 39.591 –107.76 4/26/2009 1640

628 Rifle Unknown Not available –9,999 39.511 –107.821 10/3/2007 9999

629 Rifle Unknown Not available –9,999 39.500 –107.766 10/2/2001 9999

630 Rifle Unknown Not available –9,999 39.508 –107.756 6/8/2004 9999

631 Rifle Unknown Not available –9,999 39.512 –107.760 10/15/2001 9999

632 Rifle Unknown Not available –9,999 39.505 –107.762 2/17/2005 9999

633 Rifle Unknown Not available –9,999 39.501 –107.760 2/17/2005 9999

634 Rifle Unknown Not available 325 39.506 –107.845 7/8/1997 9999

635 Rifle Unknown Not available 150 39.512 –107.824 10/1/2007 9999

636 Rifle Unknown Not available 150 39.511 –107.821 10/2/2007 9999

637 Rifle Unknown Not available 120 39.510 –107.804 2/12/2008 9999

638 Rifle Unknown Not available 300 39.505 –107.808 2/12/2008 9999

639 Rifle Unknown Not available 200 39.504 –107.823 7/11/1997 9999

640 Rifle Unknown Not available –9,999 39.500 –107.767 3/23/2004 9999

641 Rifle Unknown Not available 194 39.503 –107.763 5/11/2004 9999

642 Rifle Unknown Not available 185 39.508 –107.751 9/28/2001 9999

643 Rifle Unknown Not available –9,999 39.508 –107.774 3/23/2004 9999

644 Rifle Unknown Not available –9,999 39.501 –107.833 1/9/2008 9999

645 Rifle Unknown Not available –9,999 39.501 –107.773 3/23/2004 9999

646 Rifle Unknown Not available –9,999 39.587 –107.768 8/16/2006 9999

647 Rifle Unknown Not available –9,999 39.566 –107.772 8/15/2006 9999

649 Rifle Unknown Not available –9,999 39.534 –107.757 8/14/2006 9999

650 Rifle Unknown Not available –9,999 39.504 –107.820 11/14/2006 9999

651 Rifle Unknown Not available –9,999 39.504 –107.820 11/14/2006 9999

652 Rifle Unknown Not available –9,999 39.503 –107.812 10/2/2007 9999

653 Rifle Unknown Not available –9,999 39.504 –107.818 7/16/2008 9999

654 Rifle Unknown Not available –9,999 39.523 –107.767 9/26/2007 1124

655 Rifle Unknown Not available –9,999 39.523 –107.767 9/26/2007 1156

656 Rifle Unknown Not available –9,999 39.528 –107.754 8/23/2006 1244

657 Rifle Unknown Not available –9,999 39.532 –107.757 8/23/2006 1154

658 Rifle Unknown Not available –9,999 39.534 –107.757 8/23/2006 930

660 Rifle Unknown Not available 80 39.578 –107.763 8/1/2006 1215

660 Rifle Unknown Not available 80 39.578 –107.763 8/1/2006 1200

661 Rifle Unknown Not available –9,999 39.536 –107.765 9/25/2006 1116

662 Rifle Unknown Not available 75 39.539 –107.758 8/2/2006 9999

663 Rifle Unknown Not available 200 39.542 –107.753 8/1/2006 1215

663 Rifle Unknown Not available 200 39.542 –107.753 8/1/2006 1200

664 Rifle Unknown Not available –9,999 39.538 –107.754 8/23/2006 1012

665 Rifle Unknown Not available 250 39.504 –107.820 1/8/2008 9999

666 Rifle Unknown Not available 240 39.511 –107.816 10/4/2007 9999

667 Rifle Unknown Not available 160 39.514 –107.818 10/4/2007 9999

668 Rifle Unknown Not available 145 39.514 –107.817 10/1/2007 9999

669 Rifle Unknown Not available –9,999 39.539 –107.758 9/25/2006 826

670 Rifle Unknown Not available 200 39.508 –107.820 10/3/2007 9999
90 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

671 Rifle Unknown Not available 265 39.504 –107.822 1/8/2008 9999

672 Rifle Unknown Not available 130 39.510 –107.805 2/11/2008 9999

673 Rifle Unknown Not available 280 39.503 –107.825 1/8/2008 9999

674 Rifle Unknown Not available 210 39.505 –107.829 1/8/2008 9999

675 Rifle Unknown Not available –9,999 39.539 –107.758 9/25/2006 1204

676 Rifle Unknown Not available –9,999 39.559 –107.760 6/14/2006 924

677 Rifle Unknown Not available 280 39.509 –107.785 11/17/2005 9999

678 Rifle Unknown Not available –9,999 39.501 –107.761 4/13/2009 9999

679 Rifle Unknown Not available –9,999 39.506 –107.763 3/31/2004 9999

680 Rifle Unknown Not available –9,999 39.505 –107.769 8/20/2002 9999

681 Rifle Unknown Not available –9,999 39.504 –107.763 4/13/2009 9999

682 Rifle Unknown Not available –9,999 39.512 –107.759 10/15/2001 9999

683 Rifle Unknown Not available –9,999 39.508 –107.755 6/8/2004 9999

684 Rifle Unknown Not available –9,999 39.500 –107.766 3/23/2004 9999

685 Rifle Unknown Not available –9,999 39.505 –107.772 6/18/2003 9999

686 Rifle Unknown Not available –9,999 39.504 –107.777 8/28/2002 9999

687 Rifle Unknown Not available –9,999 39.505 –107.761 4/13/2009 9999

688 Rifle Unknown Not available –9,999 39.501 –107.773 3/23/2004 9999

689 Rifle Unknown Not available –9,999 39.519 –107.776 8/18/2004 9999

690 Rifle Unknown Not available –9,999 39.508 –107.774 3/23/2004 9999

691 Rio Blanco Tertiary GREEN RIVER FORMATION 22 39.629 –107.964 10/23/1977 1525

692 Rulison Unknown Not available –9,999 39.406 –107.948 4/5/1968 730

693 Rulison Unknown Not available –9,999 39.472 –107.886 10/22/1997 9999

694 Rulison Unknown Not available –9,999 39.457 –107.963 8/6/1999 9999

695 Rulison Unknown Not available –9,999 39.493 –107.911 7/13/2007 9999

696 Rulison Unknown Not available –9,999 39.479 –107.965 10/18/2000 9999

699 Rulison Unknown Not available –9,999 39.477 –107.887 9/24/2002 9999

704 Rulison Unknown Not available 142 39.482 –107.934 9/13/1970 0

706 Rulison Unknown Not available –9,999 39.479 –107.942 6/11/1998 9999

707 Rulison Unknown Not available –9,999 39.481 –107.881 6/11/1998 9999

708 Rulison Unknown Not available –9,999 39.457 –107.949 6/12/1998 9999

709 Rulison Unknown Not available –9,999 39.456 –107.986 6/9/1998 9999

710 Rulison Unknown Not available –9,999 39.446 –107.981 9/17/1999 9999

711 Rulison Unknown Not available –9,999 39.459 –107.972 6/9/1998 9999

712 Rulison Unknown Not available –9,999 39.484 –107.901 2/11/1999 9999

714 Rulison Unknown Not available –9,999 39.483 –107.901 2/11/1999 9999

715 Rulison Unknown Not available –9,999 39.482 –107.949 7/9/1997 9999

716 Rulison Unknown Not available –9,999 39.480 –107.881 10/22/1997 9999

717 Rulison Unknown Not available –9,999 39.481 –107.887 10/22/1997 9999

718 Rulison Unknown Not available –9,999 39.473 –107.892 10/22/1997 9999

719 Rulison Unknown Not available 200 39.462 –107.973 6/10/1998 9999

720 Rulison Unknown Not available 210 39.465 –107.974 6/10/1998 9999

721 Rulison Unknown Not available –9,999 39.482 –107.878 12/17/1998 9999

722 Rulison Unknown Not available –9,999 39.482 –107.878 1/30/2004 9999

723 Rulison Unknown Not available –9,999 39.476 –107.876 1/18/1999 9999

724 Rulison Unknown Not available –9,999 39.475 –107.880 1/18/1999 9999

725 Rulison Unknown Not available –9,999 39.481 –107.880 1/30/2004 9999

726 Rulison Unknown Not available –9,999 39.456 –107.983 7/21/2005 9999

727 Rulison Unknown Not available 205 39.479 –107.942 6/11/1998 9999

728 Rulison Unknown Not available 90 39.480 –107.942 6/11/1998 9999

729 Rulison Unknown Not available 130 39.480 –107.940 6/11/1998 9999

730 Rulison Unknown Not available 130 39.480 –107.940 6/11/1998 9999

731 Rulison Unknown Not available 168 39.460 –107.925 6/12/1998 9999

732 Rulison Unknown Not available 140 39.461 –107.928 6/12/1998 9999

733 Rulison Unknown Not available 90 39.459 –107.931 6/12/1998 9999

734 Rulison Unknown Not available 150 39.457 –107.992 6/9/1998 9999

735 Rulison Unknown Not available 250 39.454 –107.981 6/9/1998 9999

736 Rulison Unknown Not available 84 39.446 –107.976 6/9/1998 9999

737 Rulison Unknown Not available 125 39.456 –107.982 6/9/1998 9999

738 Rulison Unknown Not available 160 39.450 –107.979 6/9/1998 9999

739 Rulison Unknown Not available 90 39.465 –107.988 9/17/1999 9999

740 Rulison Unknown Not available 175 39.463 –107.984 6/9/1998 9999

741 Rulison Unknown Not available 170 39.461 –107.992 9/17/1999 9999

742 Rulison Unknown Not available 80 39.456 –107.976 6/9/1998 9999

743 Rulison Unknown Not available 155 39.456 –107.988 6/12/1997 9999

744 Rulison Unknown Not available 105 39.447 –107.977 6/12/1997 9999
Appendix 91

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

745 Rulison Unknown Not available 200 39.463 –107.973 6/12/1997 9999

746 Rulison Unknown Not available 50 39.492 –107.937 7/8/1997 9999

747 Rulison Unknown Not available 110 39.485 –107.937 7/8/1997 9999

748 Rulison Unknown Not available 130 39.485 –107.935 7/8/1997 9999

749 Rulison Unknown Not available 52 39.480 –107.928 7/8/1997 9999

750 Rulison Unknown Not available 130 39.485 –107.901 7/8/1997 9999

751 Rulison Unknown Not available 6 39.480 –107.882 7/8/1997 9999

752 Rulison Unknown Not available 130 39.480 –107.878 7/8/1997 9999

753 Rulison Unknown Not available 180 39.479 –107.943 7/9/1997 9999

754 Rulison Unknown Not available 80 39.480 –107.952 7/9/1997 9999

755 Rulison Unknown Not available 155 39.455 –107.990 7/9/1997 9999

756 Rulison Unknown Not available 270 39.478 –107.887 10/22/1997 9999

757 Rulison Unknown Not available 130 39.481 –107.875 10/23/1997 9999

758 Rulison Unknown Not available 150 39.472 –107.891 10/22/1997 9999

759 Rulison Unknown Not available 160 39.440 –107.891 10/22/1997 9999

760 Rulison Unknown Not available 170 39.458 –107.983 7/9/1997 9999

761 Rulison Unknown Not available 124 39.458 –107.979 7/9/1997 9999

762 Rulison Unknown Not available 250 39.424 –107.959 7/9/1997 9999

763 Rulison Unknown Not available 140 39.482 –107.934 7/9/1997 9999

764 Rulison Unknown Not available 120 39.482 –107.926 7/9/1997 9999

765 Rulison Unknown Not available 130 39.479 –107.879 10/23/1997 9999

766 Rulison Unknown Not available –9,999 39.455 –107.973 6/20/2006 9999

767 Rulison Unknown Not available –9,999 39.454 –107.976 6/20/2006 9999

768 Rulison Unknown Not available –9,999 39.464 –107.977 6/20/2006 9999

769 Rulison Unknown Not available –9,999 39.455 –107.974 6/20/2006 9999

770 Rulison Unknown Not available –9,999 39.449 –107.978 7/19/2006 9999

771 Rulison Unknown Not available –9,999 39.466 –107.974 7/25/2006 9999

772 Rulison Unknown Not available –9,999 39.459 –107.979 7/19/2006 9999

773 Rulison Unknown Not available –9,999 39.458 –107.963 7/19/2006 9999

774 Rulison Unknown Not available 275 39.461 –107.986 7/18/2006 9999

775 Rulison Unknown Not available –9,999 39.455 –107.973 10/5/2006 9999

776 Rulison Unknown Not available –9,999 39.455 –107.972 10/5/2006 9999

777 Rulison Unknown Not available –9,999 39.444 –107.983 5/3/2005 9999

778 Rulison Unknown Not available –9,999 39.454 –107.972 10/10/2006 9999

779 Rulison Unknown Not available 170 39.485 –107.897 10/9/2006 1145

780 Rulison Unknown Not available 60 39.474 –107.907 9/1/2006 1020

781 Rulison Unknown Not available 135 39.482 –107.935 11/1/2006 1500

782 Rulison Unknown Not available –9,999 39.465 –107.972 3/27/2008 9999

783 Rulison Unknown Not available 170 39.469 –107.909 9/13/2006 903

784 Rulison Unknown Not available 220 39.467 –107.912 9/1/2006 1250

785 Rulison Unknown Not available 85 39.496 –107.948 10/26/2006 1200

786 Rulison Unknown Not available 240 39.470 –107.913 8/30/2006 1515

787 Rulison Unknown Not available 130 39.476 –107.911 10/6/2008 1515

788 Rulison Unknown Not available 130 39.482 –107.926 10/18/2006 1205

789 Rulison Unknown Not available 100 39.459 –107.935 10/17/2006 1510

790 Rulison Unknown Not available 74 39.480 –107.940 10/6/2008 1615

791 Rulison Unknown Not available –9,999 39.452 –107.976 10/5/2006 9999

792 Rulison Unknown Not available –9,999 39.456 –107.977 10/5/2006 9999

793 Rulison Unknown Not available –9,999 39.480 –107.951 8/7/2006 9999

794 Rulison Unknown Not available –9,999 39.455 –107.976 10/10/2006 9999

795 Rulison Unknown Not available –9,999 39.452 –107.974 10/5/2006 9999

796 Rulison Unknown Not available –9,999 39.453 –107.986 7/9/2004 9999

797 Rulison Unknown Not available –9,999 39.483 –107.904 12/22/2004 9999

798 Rulison Unknown Not available –9,999 39.450 –107.975 10/10/2006 9999

799 Rulison Unknown Not available –9,999 39.439 –107.999 12/5/2008 9999

800 Rulison Unknown Not available –9,999 39.46 –107.99 8/12/1998 9999

801 Silt Unknown Not available –9,999 39.526 –107.740 8/3/1978 0

802 Silt Unknown Not available –9,999 39.501 –107.689 1/20/2005 9999

803 Silt Unknown Not available –9,999 39.505 –107.631 7/14/2005 9999

804 Silt Tertiary WASATCH FORMATION 140 39.503 –107.632 4/23/2009 1550

805 Silt Tertiary WASATCH FORMATION 150 39.517 –107.653 4/25/2009 1510

806 Silt Unknown Not available –9,999 39.503 –107.659 6/8/2007 9999

807 Silt Tertiary WASATCH FORMATION 440 39.517 –107.659 4/25/2009 1210

811 Silt Tertiary WASATCH FORMATION 80 39.553 –107.706 4/21/2009 1700

812 Silt Tertiary WASATCH FORMATION 52 39.553 –107.673 4/22/2009 1600

813 Silt Tertiary WASATCH FORMATION 80 39.555 –107.627 4/20/2009 1430
92 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

814 Silt Tertiary WASATCH FORMATION 145 39.560 –107.663 4/24/2009 1100

815 Silt Unknown Not available –9,999 39.544 –107.733 8/14/2006 9999

816 Silt Tertiary WASATCH FORMATION 100 39.569 –107.719 4/24/2009 900

817 Silt Tertiary WASATCH FORMATION 138 39.571 –107.698 4/22/2009 900

818 Silt Unknown Not available –9,999 39.542 –107.747 8/14/2006 9999

819 Silt Quaternary VALLEY-FILL DEPOSITS 50 39.565 –107.672 9/11/1997 1015

820 Silt Tertiary WASATCH FORMATION 200 39.582 –107.679 4/22/2009 1200

821 Silt Unknown Not available –9,999 39.537 –107.639 6/4/1997 9999

822 Silt Unknown Not available –9,999 39.519 –107.684 6/28/2005 9999

823 Silt Unknown Not available –9,999 39.518 –107.685 6/28/2005 9999

824 Silt Unknown Not available –9,999 39.520 –107.678 6/30/2005 9999

825 Silt Unknown Not available –9,999 39.520 –107.683 7/12/2005 9999

826 Silt Unknown Not available –9,999 39.515 –107.628 6/14/2007 9999

827 Silt Unknown Not available –9,999 39.509 –107.639 4/20/2005 9999

828 Silt Unknown Not available 100 39.580 –107.660 8/9/2006 9999

829 Silt Unknown Not available 120 39.574 –107.639 6/3/1997 9999

830 Silt Unknown Not available 140 39.566 –107.733 8/15/2006 9999

831 Silt Unknown Not available –9,999 39.516 –107.661 1/31/1995 9999

832 Silt Unknown Not available –9,999 39.518 –107.691 7/12/2005 9999

833 Silt Unknown Not available –9,999 39.504 –107.628 7/14/2005 9999

834 Silt Unknown Not available 70 39.534 –107.672 6/4/1997 9999

835 Silt Unknown Not available 100 39.564 –107.675 8/1/2006 9999

836 Silt Unknown Not available 160 39.573 –107.635 8/15/2006 9999

837 Silt Unknown Not available 80 39.564 –107.701 8/10/2006 9999

838 Silt Unknown Not available 78 39.555 –107.677 8/8/2006 1215

838 Silt Unknown Not available 78 39.555 –107.677 8/8/2006 1200

839 Silt Unknown Not available 250 39.535 –107.625 6/13/1997 9999

840 Silt Unknown Not available 100 39.558 –107.730 7/31/2006 1215

840 Silt Unknown Not available 100 39.558 –107.730 7/31/2006 1200

841 Silt Unknown Not available 97 39.552 –107.726 8/14/2006 9999

842 Silt Unknown Not available 80 39.550 –107.718 7/31/2006 1215

842 Silt Unknown Not available 80 39.550 –107.718 7/31/2006 1200

843 Silt Unknown Not available 100 39.528 –107.661 7/12/1997 9999

844 Silt Unknown Not available 50 39.534 –107.656 7/12/1997 9999

845 Silt Unknown Not available 430 39.581 –107.670 8/15/2006 9999

846 Silt Unknown Not available –9,999 39.516 –107.625 6/14/2007 9999

847 Silt Unknown Not available –9,999 39.510 –107.647 7/13/2007 9999

848 Silt Unknown Not available –9,999 39.513 –107.629 5/5/2005 9999

849 Silt Unknown Not available –9,999 39.501 –107.629 7/6/2007 9999

850 Silt Unknown Not available –9,999 39.512 –107.633 5/5/2005 9999

851 Silt Unknown Not available –9,999 39.556 –107.700 9/21/2005 9999

852 Silt Unknown Not available –9,999 39.543 –107.724 10/17/2006 9999

853 Silt Unknown Not available –9,999 39.544 –107.720 10/17/2006 9999

854 Silt Unknown Not available –9,999 39.546 –107.721 10/17/2006 9999

855 Silt Unknown Not available –9,999 39.585 –107.653 8/7/2006 1215

855 Silt Unknown Not available –9,999 39.585 –107.653 8/7/2006 1200

856 Silt Unknown Not available –9,999 39.576 –107.638 8/2/2006 9999

857 Silt Unknown Not available –9,999 39.569 –107.653 8/9/2006 9999

858 Silt Unknown Not available –9,999 39.564 –107.649 8/2/2006 9999

859 Silt Unknown Not available –9,999 39.586 –107.677 8/16/2006 9999

860 Silt Unknown Not available –9,999 39.584 –107.716 8/15/2006 1215

860 Silt Unknown Not available –9,999 39.584 –107.716 8/15/2006 1200

861 Silt Unknown Not available –9,999 39.565 –107.746 8/16/2006 9999

862 Silt Unknown Not available –9,999 39.572 –107.680 7/31/2006 1215

862 Silt Unknown Not available –9,999 39.572 –107.680 7/31/2006 1200

863 Silt Tertiary WASATCH FORMATION 215 39.512 –107.686 3/31/2005 9999

864 Silt Unknown Not available –9,999 39.560 –107.648 8/15/2006 9999

865 Silt Unknown Not available –9,999 39.560 –107.664 8/8/2006 9999

866 Silt Unknown Not available –9,999 39.558 –107.706 8/2/2006 1215

866 Silt Unknown Not available –9,999 39.558 –107.706 8/2/2006 1200

867 Silt Unknown Not available –9,999 39.548 –107.673 8/15/2006 9999

868 Silt Unknown Not available –9,999 39.553 –107.740 8/14/2006 9999

869 Silt Unknown Not available –9,999 39.544 –107.731 8/2/2006 9999

870 Silt Unknown Not available –9,999 39.512 –107.671 6/12/2007 1014

871 Silt Unknown Not available –9,999 39.517 –107.711 6/27/2006 813

872 Silt Unknown Not available –9,999 39.517 –107.653 9/24/2008 1156
Appendix 93

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

873 Silt Unknown Not available –9,999 39.517 –107.665 9/24/2008 1258

874 Silt Unknown Not available –9,999 39.520 –107.683 9/26/2007 1320

875 Silt Unknown Not available –9,999 39.520 –107.708 6/27/2006 950

876 Silt Unknown Not available –9,999 39.521 –107.700 6/27/2006 900

877 Silt Unknown Not available –9,999 39.528 –107.704 6/27/2006 1039

878 Silt Unknown Not available –9,999 39.529 –107.746 8/23/2006 1307

879 Silt Unknown Not available –9,999 39.531 –107.629 6/28/2007 1210

880 Silt Unknown Not available –9,999 39.531 –107.694 9/21/2005 1101

881 Silt Unknown Not available –9,999 39.531 –107.694 9/21/2005 1314

882 Silt Unknown Not available –9,999 39.531 –107.696 9/21/2005 1132

883 Silt Unknown Not available –9,999 39.531 –107.702 9/21/2005 933

884 Silt Unknown Not available –9,999 39.531 –107.681 11/30/2006 1205

885 Silt Unknown Not available –9,999 39.531 –107.670 2/5/2009 856

886 Silt Tertiary WASATCH FORMATION 100 39.587 –107.678 5/10/2005 9999

887 Silt Unknown Not available –9,999 39.531 –107.671 2/5/2009 932

888 Silt Unknown Not available –9,999 39.531 –107.691 9/21/2005 1014

889 Silt Unknown Not available –9,999 39.532 –107.682 11/30/2006 1244

890 Silt Unknown Not available –9,999 39.533 –107.670 2/5/2009 1117

891 Silt Unknown Not available –9,999 39.533 –107.631 6/28/2007 1241

892 Silt Unknown Not available –9,999 39.533 –107.671 2/5/2009 1023

893 Silt Unknown Not available –9,999 39.533 –107.670 2/5/2009 1205

894 Silt Unknown Not available –9,999 39.534 –107.676 2/4/2009 1326

895 Silt Unknown Not available –9,999 39.534 –107.748 8/23/2006 1047

896 Silt Unknown Not available –9,999 39.534 –107.655 3/29/2006 1147

897 Silt Unknown Not available 400 39.580 –107.643 8/2/2006 9999

898 Silt Unknown Not available 60 39.579 –107.646 8/2/2006 1215

898 Silt Unknown Not available 60 39.579 –107.646 8/2/2006 1200

899 Silt Unknown Not available 200 39.564 –107.632 8/9/2006 1215

899 Silt Unknown Not available 200 39.564 –107.632 8/9/2006 1200

900 Silt Unknown Not available –9,999 39.534 –107.655 3/29/2006 1216

901 Silt Unknown Not available –9,999 39.534 –107.672 2/5/2009 1335

902 Silt Unknown Not available –9,999 39.534 –107.676 2/4/2009 1247

903 Silt Unknown Not available –9,999 39.535 –107.652 3/29/2006 1307

904 Silt Unknown Not available –9,999 39.535 –107.653 3/29/2006 1244

905 Silt Unknown Not available 110 39.583 –107.662 8/9/2006 1215

905 Silt Unknown Not available 110 39.583 –107.662 8/9/2006 1200

906 Silt Unknown Not available 200 39.580 –107.680 8/8/2006 9999

907 Silt Unknown Not available 85 39.582 –107.679 8/8/2006 1215

907 Silt Unknown Not available 85 39.582 –107.679 8/8/2006 1200

908 Silt Unknown Not available 220 39.571 –107.735 8/4/2006 1215

908 Silt Unknown Not available 220 39.571 –107.735 8/4/2006 1200

909 Silt Unknown Not available –9,999 39.535 –107.670 2/4/2009 1147

910 Silt Unknown Not available 110 39.569 –107.719 8/4/2006 9999

911 Silt Unknown Not available 50 39.577 –107.718 8/3/2006 9999

912 Silt Unknown Not available 80 39.564 –107.713 8/7/2006 9999

913 Silt Unknown Not available 265 39.574 –107.712 8/7/2006 1215

913 Silt Unknown Not available 265 39.574 –107.712 8/7/2006 1200

915 Silt Unknown Not available 125 39.564 –107.690 8/14/2006 9999

916 Silt Unknown Not available 110 39.571 –107.659 8/1/2006 1215

916 Silt Unknown Not available 110 39.571 –107.659 8/1/2006 1200

917 Silt Unknown Not available –9,999 39.536 –107.662 3/28/2006 1006

918 Silt Unknown Not available 120 39.565 –107.660 7/31/2006 1215

918 Silt Unknown Not available 120 39.565 –107.660 7/31/2006 1200

919 Silt Unknown Not available –9,999 39.537 –107.646 8/30/2005 935

920 Silt Unknown Not available –9,999 39.537 –107.638 6/28/2007 1319

921 Silt Unknown Not available –9,999 39.537 –107.645 8/25/2005 1210

922 Silt Unknown Not available 125 39.556 –107.627 8/9/2006 9999

923 Silt Unknown Not available 65 39.559 –107.628 8/9/2006 9999

924 Silt Unknown Not available 218 39.551 –107.640 8/4/2006 1215

924 Silt Unknown Not available 218 39.551 –107.640 8/4/2006 1200

925 Silt Unknown Not available 123 39.560 –107.663 8/9/2006 1215

925 Silt Unknown Not available 123 39.560 –107.663 8/9/2006 1200

926 Silt Unknown Not available 70 39.551 –107.696 8/2/2006 9999

927 Silt Unknown Not available –9,999 39.537 –107.748 9/26/2007 924

928 Silt Unknown Not available 110 39.551 –107.694 8/2/2006 1215

928 Silt Unknown Not available 110 39.551 –107.694 8/2/2006 1200
94 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

930 Silt Unknown Not available –9,999 39.537 –107.739 1/31/2006 924

931 Silt Unknown Not available –9,999 39.538 –107.677 8/30/2005 1204

932 Silt Unknown Not available –9,999 39.538 –107.646 8/30/2005 1236

933 Silt Unknown Not available 60 39.542 –107.739 8/2/2006 9999

934 Silt Unknown Not available 105 39.545 –107.736 8/2/2006 1215

934 Silt Unknown Not available 105 39.545 –107.736 8/2/2006 1200

935 Silt Unknown Not available –9,999 39.539 –107.746 2/1/2006 1233

936 Silt Unknown Not available –9,999 39.539 –107.661 3/28/2006 906

937 Silt Unknown Not available –9,999 39.539 –107.737 1/31/2006 1052

938 Silt Unknown Not available –9,999 39.540 –107.662 3/28/2006 845

939 Silt Unknown Not available –9,999 39.540 –107.736 1/31/2006 1015

940 Silt Unknown Not available –9,999 39.540 –107.742 2/1/2006 1105

941 Silt Unknown Not available –9,999 39.541 –107.739 2/1/2006 1001

942 Silt Unknown Not available –9,999 39.541 –107.738 2/1/2006 846

943 Silt Unknown Not available –9,999 39.542 –107.739 2/1/2006 930

944 Silt Unknown Not available –9,999 39.542 –107.745 2/2/2006 847

945 Silt Unknown Not available –9,999 39.543 –107.664 11/30/2006 1044

946 Silt Unknown Not available –9,999 39.543 –107.665 11/30/2006 1030

947 Silt Unknown Not available –9,999 39.543 –107.723 12/6/2005 1037

948 Silt Unknown Not available –9,999 39.544 –107.733 4/10/2007 1045

949 Silt Unknown Not available –9,999 39.544 –107.743 2/1/2006 1146

950 Silt Unknown Not available –9,999 39.544 –107.720 12/6/2005 936

951 Silt Unknown Not available –9,999 39.544 –107.731 4/10/2007 1120

952 Silt Unknown Not available –9,999 39.545 –107.736 1/31/2006 1201

953 Silt Unknown Not available –9,999 39.545 –107.733 4/10/2007 1007

954 Silt Unknown Not available –9,999 39.546 –107.722 12/6/2005 1213

955 Silt Unknown Not available –9,999 39.546 –107.709 3/8/2006 1318

956 Silt Unknown Not available –9,999 39.546 –107.732 4/10/2007 930

957 Silt Unknown Not available –9,999 39.547 –107.686 11/15/2006 1346

958 Silt Unknown Not available –9,999 39.547 –107.708 3/7/2006 1334

959 Silt Unknown Not available –9,999 39.547 –107.719 12/6/2005 1121

960 Silt Unknown Not available –9,999 39.547 –107.707 3/7/2006 1306

961 Silt Unknown Not available –9,999 39.547 –107.712 5/9/2006 1312

962 Silt Unknown Not available –9,999 39.548 –107.708 3/7/2006 948

963 Silt Unknown Not available –9,999 39.547 –107.715 5/9/2006 1232

964 Silt Unknown Not available –9,999 39.547 –107.716 12/6/2005 840

965 Silt Unknown Not available –9,999 39.548 –107.709 3/7/2006 855

966 Silt Unknown Not available –9,999 39.548 –107.710 3/7/2006 1026

967 Silt Unknown Not available –9,999 39.548 –107.730 4/10/2007 815

968 Silt Unknown Not available –9,999 39.549 –107.728 4/10/2007 857

969 Silt Unknown Not available –9,999 39.549 –107.699 11/15/2006 1203

970 Silt Unknown Not available –9,999 39.549 –107.700 3/8/2006 1137

971 Silt Unknown Not available –9,999 39.549 –107.710 3/7/2006 1138

972 Silt Unknown Not available –9,999 39.549 –107.736 10/16/2008 1020

973 Silt Unknown Not available –9,999 39.550 –107.738 10/16/2008 930

974 Silt Unknown Not available –9,999 39.550 –107.687 11/15/2006 906

975 Silt Unknown Not available –9,999 39.550 –107.701 3/8/2006 959

976 Silt Unknown Not available –9,999 39.550 –107.700 3/8/2006 1057

977 Silt Unknown Not available –9,999 39.550 –107.697 11/15/2006 1052

978 Silt Unknown Not available –9,999 39.550 –107.688 11/14/2006 1326

979 Silt Unknown Not available –9,999 39.550 –107.700 3/8/2006 844

980 Silt Unknown Not available –9,999 39.550 –107.718 5/9/2006 955

981 Silt Unknown Not available –9,999 39.550 –107.732 10/15/2008 1251

982 Silt Unknown Not available –9,999 39.551 –107.687 11/14/2006 1238

983 Silt Unknown Not available –9,999 39.551 –107.717 5/9/2006 1034

984 Silt Unknown Not available –9,999 39.551 –107.687 11/14/2006 1154

985 Silt Unknown Not available –9,999 39.551 –107.691 11/14/2006 1044

986 Silt Unknown Not available –9,999 39.551 –107.693 11/14/2006 947

987 Silt Unknown Not available –9,999 39.551 –107.710 5/9/2006 1116

988 Silt Unknown Not available –9,999 39.551 –107.686 11/15/2006 1010

989 Silt Unknown Not available –9,999 39.551 –107.696 11/14/2006 906

990 Silt Unknown Not available –9,999 39.551 –107.701 3/8/2006 917

991 Silt Unknown Not available –9,999 39.551 –107.720 5/9/2006 832

992 Silt Unknown Not available –9,999 39.551 –107.721 5/9/2006 913

993 Silt Unknown Not available –9,999 39.552 –107.726 4/10/2007 1202

994 Silt Unknown Not available –9,999 39.551 –107.738 10/16/2008 1103
Appendix 95

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

995 Silt Unknown Not available –9,999 39.552 –107.729 4/10/2007 1222

996 Silt Unknown Not available –9,999 39.552 –107.703 3/9/2006 916

997 Silt Unknown Not available –9,999 39.552 –107.730 10/15/2008 911

998 Silt Unknown Not available –9,999 39.552 –107.703 3/9/2006 846

999 Silt Unknown Not available –9,999 39.552 –107.728 10/14/2008 1130

1000 Silt Unknown Not available –9,999 39.552 –107.732 10/15/2008 953

1001 Silt Unknown Not available –9,999 39.552 –107.706 6/18/2008 1122

1002 Silt Unknown Not available –9,999 39.552 –107.709 6/18/2008 1039

1003 Silt Unknown Not available –9,999 39.553 –107.713 6/18/2008 934

1004 Silt Unknown Not available –9,999 39.553 –107.714 10/14/2008 851

1005 Silt Unknown Not available –9,999 39.553 –107.731 10/15/2008 1030

1006 Silt Unknown Not available –9,999 39.554 –107.717 10/14/2008 951

1007 Silt Unknown Not available –9,999 39.555 –107.732 10/15/2008 1127

1008 Silt Unknown Not available –9,999 39.556 –107.722 10/14/2008 1201

1009 Silt Unknown Not available –9,999 39.556 –107.732 10/14/2008 1313

1010 Silt Unknown Not available –9,999 39.557 –107.726 10/14/2008 1404

1011 Silt Unknown Not available –9,999 39.564 –107.733 6/15/2006 903

1012 Silt Unknown Not available –9,999 39.565 –107.746 6/14/2006 902

1013 Silt Unknown Not available –9,999 39.566 –107.732 6/13/2006 1102

1014 Silt Unknown Not available –9,999 39.568 –107.734 6/14/2006 1140

1015 Silt Unknown Not available –9,999 39.569 –107.735 6/14/2006 1216

1016 Silt Unknown Not available –9,999 39.569 –107.732 6/14/2006 1342

1017 Silt Unknown Not available –9,999 39.570 –107.732 6/14/2006 1312

1018 Silt Unknown Not available –9,999 39.571 –107.733 6/13/2006 1143

1019 Silt Unknown Not available –9,999 39.571 –107.735 6/13/2006 1222

1020 Silt Unknown Not available –9,999 39.571 –107.737 6/13/2006 1337

1021 Silt Unknown Not available –9,999 39.572 –107.735 6/13/2006 1307

1022 Silt Unknown Not available –9,999 39.573 –107.734 6/15/2006 950

1023 Silt Unknown Not available –9,999 39.573 –107.731 6/13/2006 957

1024 Silt Unknown Not available –9,999 39.573 –107.734 6/13/2006 916

1025 Silt Unknown Not available –9,999 39.574 –107.735 6/13/2006 837

1026 Silt Unknown Not available –9,999 39.531 –107.630 9/16/2004 9999

1027 Silt Unknown Not available –9,999 39.518 –107.632 9/16/2004 9999

1028 Silt Unknown Not available –9,999 39.53 –107.67 8/12/1998 9999

1029 Silt Unknown Not available –9,999 39.531 –107.630 9/16/2004 9999

1030 Storm King Mountain Unknown Not available –9,999 39.594 –107.450 6/2/1997 9999

1031 Storm King Mountain Unknown Not available –9,999 39.571 –107.452 6/2/1997 9999

1032 Storm King Mountain Unknown Not available –9,999 39.572 –107.494 6/2/1997 9999

1033 Storm King Mountain Unknown Not available –9,999 39.568 –107.492 6/12/1997 9999

1034 Storm King Mountain Quaternary VALLEY-FILL DEPOSITS 32 39.550 –107.415 9/10/1997 1500

1038 The Saddle Unknown Not available 56 39.500 –108.381 8/2/1977 940

1039 Banty Point Unknown Not available 30 40.061 –108.954 7/21/1981 0

1051 Banty Point Pennsylvanian WEBER FORMATION 7,500 40.104 –108.875 5/8/1973 0

1052 Banty Point Unknown Not available –9,999 40.101 –108.881 9/19/1977 800

1053 Banty Point Unknown Not available –9,999 40.121 –108.883 9/19/1977 800

1054 Barcus Creek Unknown Not available –9,999 40.041 –108.416 9/13/1979 1130

1055 Barcus Creek Tertiary GREEN RIVER FORMATION –9,999 40.020 –108.464 9/12/1973 1400

1057 Barcus Creek Unknown Not available 1,122 40.040 –108.416 11/12/1975 930

1058 Barcus Creek Unknown Not available 1,510 40.040 –108.416 11/16/1975 2100

1059 Barcus Creek Unknown Not available 2,008 40.041 –108.416 9/11/1979 1700

1062 Barcus Creek Tertiary GREEN RIVER FORMATION –9,999 40.124 –108.418 6/21/1973 1330

1064 Barcus Creek Unknown Not available –9,999 40.065 –108.417 9/17/1977 1400

1065 Barcus Creek Unknown Not available –9,999 40.044 –108.436 9/17/1977 1400

1066 Barcus Creek Unknown Not available –9,999 40.020 –108.463 9/17/1977 1400

1067 Barcus Creek Unknown Not available –9,999 40.089 –108.470 9/17/1977 1600

1068 Barcus Creek SE Unknown Not available –9,999 40.038 –108.262 8/30/1972 1100

1069 Barcus Creek SE Unknown Not available –9,999 40.057 –108.258 8/18/1975 1415

1070 Barcus Creek SE Unknown Not available –9,999 40.079 –108.334 10/2/1982 0

1071 Barcus Creek SE Tertiary GREEN RIVER FORMATION –9,999 40.005 –108.353 10/14/1982 1445

1073 Barcus Creek SE Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.017 –108.342 9/12/1973 1130

1080 Barcus Creek SE Tertiary GREEN RIVER FORMATION 1,060 40.038 –108.286 10/13/1982 1445

1081 Barcus Creek SE Unknown Not available 950 40.038 –108.286 12/8/1975 1800

1084 Barcus Creek SE Tertiary GREEN RIVER FORMATION –9,999 40.041 –108.258 2/20/1973 1415

1085 Barcus Creek SE Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.046 –108.336 9/12/1973 1600

1091 Barcus Creek SE Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.059 –108.251 9/7/1973 930

1094 Barcus Creek SE Unknown Not available 3,140 40.067 –108.337 5/24/1966 0
96 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1095 Barcus Creek SE Unknown Not available 3,140 40.067 –108.337 5/24/1966 0

1096 Barcus Creek SE Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.086 –108.340 9/13/1973 1730

1099 Barcus Creek SE Quaternary ALLUVIUM,TERRACE –9,999 40.096 –108.256 7/13/1982 0

1100 Barcus Creek SE Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.115 –108.359 8/30/1973 1100

1101 Big Beaver Reservoir Unknown Not available –9,999 39.949 –107.711 8/17/1981 0

1107 Buckskin Point Quaternary ALLUVIUM,FLOOD PLAIN 17.9 40.013 –108.093 3/30/1983 0

1125 Buckskin Point Unknown Not available 60 40.034 –108.034 1/23/1981 0

1130 Buckskin Point Unknown Not available –9,999 40.02 –108.01 7/8/1998 9999

1141 Cutoff Gulch Unknown Not available –9,999 39.718 –108.226 9/15/1977 1100

1142 Cutoff Gulch Tertiary GREEN RIVER FORMATION –9,999 39.718 –108.168 9/5/1973 1230

1144 Devils Hole Gulch Unknown Not available –9,999 40.147 –107.978 9/4/1981 1455

1146 Devils Hole Gulch Tertiary WASATCH FORMATION 100 40.149 –107.965 7/1/1975 0

1147 Devils Hole Gulch Tertiary WASATCH FORMATION 40 40.162 –107.997 7/1/1975 0

1149 Divide Creek Unknown Not available 65 40.176 –108.555 7/17/1981 0

1153 Divide Creek Unknown Not available 25 40.185 –108.533 7/19/1981 0

1154 Divide Creek Unknown Not available 35 40.189 –108.526 7/19/1981 0

1160 Figure Four Spring Tertiary GREEN RIVER FORMATION 2,389 39.746 –108.432 7/12/1973 1700

1164 Gillam Draw Unknown Not available 25 40.097 –108.722 7/20/1981 0

1173 Greasewood Gulch Unknown Not available –9,999 39.889 –108.181 9/16/1977 1700

1174 Greasewood Gulch Unknown Not available –9,999 39.877 –108.228 6/6/1975 1430

1175 Greasewood Gulch Unknown Not available –9,999 39.889 –108.181 6/6/1975 1700

1176 Greasewood Gulch Unknown Not available –9,999 39.912 –108.208 9/12/1977 9999

1177 Greasewood Gulch Unknown Not available –9,999 39.897 –108.182 9/12/1977 9999

1178 Greasewood Gulch Tertiary GREEN RIVER FORMATION –9,999 39.897 –108.192 8/29/1973 1200

1182 Greasewood Gulch Tertiary GREEN RIVER FORMATION –9,999 39.979 –108.146 7/2/1973 1030

1185 Greasewood Gulch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.980 –108.247 7/11/1973 930

1186 Greasewood Gulch Tertiary GREEN RIVER FORMATION –9,999 39.981 –108.146 6/27/1973 1630

1187 Jessup Gulch Unknown Not available –9,999 39.753 –108.233 9/13/1977 1300

1188 Jessup Gulch Unknown Not available –9,999 39.797 –108.248 10/30/1980 1015

1189 Jessup Gulch Unknown Not available –9,999 39.800 –108.213 2/25/1975 1330

1190 Jessup Gulch Unknown Not available –9,999 39.802 –108.213 4/9/1991 1005

1191 Jessup Gulch Unknown Not available –9,999 39.803 –108.173 5/22/1981 1300

1192 Jessup Gulch Unknown Not available –9,999 39.807 –108.224 4/2/1991 1235

1193 Jessup Gulch Unknown Not available –9,999 39.807 –108.226 4/3/1991 1425

1194 Jessup Gulch Unknown Not available –9,999 39.808 –108.225 3/24/1983 1230

1195 Jessup Gulch Unknown Not available –9,999 39.810 –108.228 4/1/1991 1515

1196 Jessup Gulch Unknown Not available –9,999 39.783 –108.191 5/22/1981 1030

1197 Jessup Gulch Unknown Not available –9,999 39.786 –108.198 12/4/1972 1535

1198 Jessup Gulch Unknown Not available –9,999 39.797 –108.203 10/9/1975 1430

1199 Jessup Gulch Unknown Not available –9,999 39.810 –108.228 4/1/1991 1530

1200 Jessup Gulch Unknown Not available –9,999 39.812 –108.225 4/1/1991 1330

1201 Jessup Gulch Unknown Not available –9,999 39.814 –108.192 12/6/1972 1335

1202 Jessup Gulch Unknown Not available –9,999 39.814 –108.233 11/12/1972 2015

1203 Jessup Gulch Unknown Not available –9,999 39.815 –108.244 1/31/1975 1130

1204 Jessup Gulch Unknown Not available –9,999 39.816 –108.206 11/13/1972 1435

1205 Jessup Gulch Unknown Not available –9,999 39.816 –108.231 3/17/1977 800

1206 Jessup Gulch Unknown Not available –9,999 39.817 –108.240 4/1/1991 1010

1207 Jessup Gulch Unknown Not available –9,999 39.817 –108.240 4/1/1991 1050

1208 Jessup Gulch Unknown Not available –9,999 39.817 –108.231 4/2/1991 1020

1209 Jessup Gulch Unknown Not available –9,999 39.817 –108.231 4/2/1991 1030

1210 Jessup Gulch Unknown Not available –9,999 39.837 –108.244 5/21/1981 1130

1211 Jessup Gulch Unknown Not available –9,999 39.843 –108.233 5/21/1981 1345

1213 Jessup Gulch Tertiary GREEN RIVER FORMATION –9,999 39.807 –108.227 4/13/1977 1230

1230 Jessup Gulch Quaternary VALLEY-FILL DEPOSITS 75.4 39.836 –108.225 4/3/1991 1200

1237 Jessup Gulch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.841 –108.235 9/6/1973 1000

1239 Jessup Gulch Unknown Not available 495 39.865 –108.209 5/12/1975 1900

1244 LO 7 Hill Unknown Not available –9,999 39.98 –107.93 7/7/1998 9999

1250 Meeker Unknown Not available –9,999 40.025 –107.938 6/29/1981 1400

1251 Meeker Unknown Not available –9,999 40.027 –107.964 6/26/1980 0

1252 Meeker Unknown Not available –9,999 40.028 –107.935 7/26/1979 0

1253 Meeker Unknown Not available –9,999 40.080 –107.919 6/9/1981 1100

1254 Meeker Unknown Not available –9,999 40.112 –107.923 7/1/1975 0

1256 Meeker Quaternary ALLUVIUM,TERRACE 60 40.002 –107.883 12/27/1978 0

1260 Meeker Unknown Not available 175 40.010 –107.968 7/1/1975 0

1265 Meeker Unknown Not available 22.5 40.012 –107.886 1/19/1979 0

1267 Meeker Unknown Not available 20 40.015 –107.978 7/1/1975 0
Appendix 97

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1272 Meeker Unknown Not available 16 40.019 –107.973 7/11/1979 0

1273 Meeker Quaternary ALLUVIUM,FLOOD PLAIN 120 40.019 –107.940 7/1/1975 0

1277 Meeker Quaternary ALLUVIUM,FLOOD PLAIN 25 40.021 –107.956 7/29/1975 0

1282 Meeker Unknown Not available 80 40.022 –107.883 7/26/1979 0

1297 Meeker Unknown Not available 35 40.029 –107.923 8/1/1979 0

1302 Meeker Unknown Not available 240 40.035 –107.968 1/14/1981 0

1305 Meeker Cretaceous MESAVERDE GROUP 180 40.039 –107.923 7/29/1975 0

1306 Meeker Tertiary WASATCH FORMATION 280 40.052 –107.977 7/1/1975 0

1307 Meeker Tertiary WASATCH FORMATION 530 40.053 –107.979 7/16/1979 0

1317 Meeker Unknown Not available 40 40.02 –107.94 7/7/1998 9999

1318 Meeker Unknown Not available –9,999 40.01 –107.91 7/7/1998 9999

1321 No Name Ridge Unknown Not available –9,999 39.800 –108.087 8/3/1983 915

1327 Rangely Unknown Not available –9,999 40.099 –108.770 6/18/1981 0

1328 Rangely Cretaceous MESAVERDE GROUP 665 40.046 –108.775 10/17/1972 0

1329 Rangely Cretaceous MESAVERDE GROUP 665 40.046 –108.775 10/1/1972 0

1330 Rangely Cretaceous MESAVERDE GROUP 908 40.058 –108.773 3/29/1951 0

1333 Rangely Unknown Not available 18 40.086 –108.798 6/19/1981 0

1369 Rangely Unknown Not available 46 40.096 –108.773 7/17/1981 0

1371 Rangely Quaternary ALLUVIUM 12 40.096 –108.810 7/14/1958 0

1381 Rangely Unknown Not available 16 40.099 –108.775 6/9/1981 0

1382 Rangely Unknown Not available 15 40.100 –108.750 6/19/1980 0

1383 Rangely Unknown Not available 11 40.100 –108.777 6/9/1981 0

1387 Rattlesnake Mesa Unknown Not available –9,999 40.019 –107.820 8/12/1981 0

1388 Rattlesnake Mesa Unknown Not available –9,999 40.031 –107.811 7/2/1982 0

1389 Rattlesnake Mesa Unknown Not available –9,999 40.034 –107.857 7/11/1972 1430

1390 Rattlesnake Mesa Unknown Not available –9,999 40.035 –107.840 7/11/1972 1500

1391 Rattlesnake Mesa Unknown Not available –9,999 40.036 –107.841 4/28/1973 1445

1392 Rattlesnake Mesa Unknown Not available –9,999 40.040 –107.850 7/11/1972 1200

1393 Rattlesnake Mesa Unknown Not available –9,999 40.055 –107.856 7/11/1972 1730

1395 Rattlesnake Mesa Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.003 –107.819 7/1/1975 0

1403 Rattlesnake Mesa Unknown Not available 72 40.012 –107.812 8/13/1981 0

1409 Rattlesnake Mesa Unknown Not available 57.5 40.031 –107.810 7/2/1982 0

1410 Rattlesnake Mesa Unknown Not available 100 40.033 –107.816 6/18/1975 0

1411 Rattlesnake Mesa Quaternary ALLUVIUM,FLOOD PLAIN 5.3 40.034 –107.863 7/20/1979 0

1415 Rattlesnake Mesa Unknown Not available 20 40.036 –107.872 8/17/1981 0

1416 Rattlesnake Mesa Unknown Not available 52 40.067 –107.817 1/23/1981 0

1418 Rattlesnake Mesa Cretaceous MESAVERDE GROUP 1,200 40.123 –107.848 6/4/1975 0

1419 Rattlesnake Mesa Unknown Not available –9,999 40.01 –107.82 7/7/1998 9999

1420 Rattlesnake Mesa Unknown Not available –9,999 40.04 –107.81 7/7/1998 9999

1421 Razorback Ridge Unknown Not available –9,999 39.695 –108.521 10/6/1976 1030

1422 Rock School Unknown Not available –9,999 39.833 –108.333 12/19/1971 1415

1423 Rock School Unknown Not available 655 39.761 –108.321 10/5/1982 1230

1426 Rock School Tertiary GREEN RIVER FORMATION –9,999 39.762 –108.264 10/18/1974 400

1433 Rock School Tertiary GREEN RIVER FORMATION –9,999 39.824 –108.278 8/14/1973 1500

1438 Rock School Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.841 –108.325 8/2/1973 1200

1443 Rock School Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.851 –108.316 8/2/1973 1300

1445 Rock School Quaternary ALLUVIUM,FLOOD PLAIN 80 39.855 –108.368 8/2/1973 1630

1448 Rock School Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.858 –108.312 8/2/1973 1530

1450 Rock School Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.859 –108.311 8/2/1973 1500

1452 Rock School Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.860 –108.309 8/2/1973 1600

1454 Rock School Unknown Not available 640 39.860 –108.351 10/7/1982 1630

1461 Rough Gulch Unknown Not available 10 40.178 –108.396 7/20/1981 0

1463 Rough Gulch Unknown Not available 27 40.197 –108.478 7/20/1981 0

1464 Rough Gulch Unknown Not available 60 40.197 –108.478 7/20/1981 0

1465 Rough Gulch Unknown Not available –9,999 40.177 –108.392 9/17/1977 1000

1466 Sagebrush Hill Unknown Not available –9,999 39.891 –108.513 2/20/1975 1515

1467 Sagebrush Hill Unknown Not available –9,999 39.891 –108.513 4/3/1975 1300

1468 Sagebrush Hill Unknown Not available –9,999 39.907 –108.501 3/7/1975 1445

1469 Sagebrush Hill Unknown Not available –9,999 39.914 –108.502 8/26/1980 1635

1475 Sagebrush Hill Unknown Not available –9,999 39.914 –108.505 9/13/1989 1000

1476 Sagebrush Hill Unknown Not available –9,999 39.914 –108.505 9/13/1989 830

1477 Sagebrush Hill Unknown Not available –9,999 39.925 –108.525 1/29/1975 1100

1478 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.884 –108.501 9/26/1973 1300

1480 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.894 –108.523 10/9/1973 1700

1482 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.906 –108.533 6/8/1973 1200

1484 Sagebrush Hill Tertiary GREEN RIVER FORMATION 1,736 39.907 –108.501 4/10/1975 1545
98 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1486 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.914 –108.505 7/19/1978 1030

1487 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.915 –108.505 7/19/1978 1230

1488 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.915 –108.505 3/22/1978 1500

1492 Sagebrush Hill Tertiary GREEN RIVER FORMATION –9,999 39.964 –108.511 6/26/1973 1000

1497 Sawmill Mountain Unknown Not available 35 40.031 –107.726 8/28/1981 0

1498 Sawmill Mountain Unknown Not available 80 40.074 –107.714 7/31/1975 0

1499 Segar Mountain Unknown Not available 1,182 39.886 –108.085 9/18/1975 2000

1502 Segar Mountain Unknown Not available 790 39.930 –108.103 1/26/1976 1700

1506 Smizer Gulch Unknown Not available –9,999 40.147 –108.335 9/16/1977 1700

1507 Square S Ranch Unknown Not available –9,999 39.984 –108.280 8/14/1972 1130

1508 Square S Ranch Unknown Not available –9,999 39.906 –108.363 8/28/1972 1400

1509 Square S Ranch Unknown Not available –9,999 39.913 –108.323 10/28/1976 600

1510 Square S Ranch Unknown Not available –9,999 39.933 –108.313 11/7/1976 410

1512 Square S Ranch Unknown Not available –9,999 39.944 –108.356 11/13/1981 1030

1513 Square S Ranch Unknown Not available –9,999 39.944 –108.356 7/17/1981 1500

1514 Square S Ranch Tertiary EOCENE SERIES 1,442 39.944 –108.297 7/13/2000 1531

1515 Square S Ranch Tertiary EOCENE SERIES 1,305 39.944 –108.309 7/12/2000 1551

1516 Square S Ranch Tertiary EOCENE SERIES 490 39.947 –108.292 7/11/2000 901

1517 Square S Ranch Tertiary EOCENE SERIES 919 39.947 –108.292 7/10/2000 1201

1518 Square S Ranch Tertiary GREEN RIVER FORMATION 810 39.882 –108.262 9/9/1975 1000

1519 Square S Ranch Unknown Not available 5,182 39.882 –108.262 6/15/1979 710

1523 Square S Ranch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.891 –108.294 8/3/1973 1130

1526 Square S Ranch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.907 –108.296 8/3/1973 1200

1530 Square S Ranch Tertiary GREEN RIVER FORMATION –9,999 39.912 –108.295 6/21/1973 1700

1532 Square S Ranch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.912 –108.296 8/3/1973 1300

1535 Square S Ranch Quaternary ALLUVIUM,TERRACE 34.5 39.938 –108.294 7/12/2000 1811

1536 Square S Ranch Quaternary ALLUVIUM,FLOOD PLAIN 42 39.942 –108.286 9/6/1973 1230

1538 Square S Ranch Tertiary EOCENE SERIES 1,028 39.942 –108.299 7/13/2000 1131

1539 Square S Ranch Tertiary EOCENE SERIES 1,283 39.947 –108.292 7/11/2000 1001

1539 Square S Ranch Tertiary EOCENE SERIES 1,283 39.947 –108.292 7/11/2000 1000

1540 Square S Ranch Tertiary EOCENE SERIES 1,000 39.947 –108.315 7/12/2000 1211

1541 Square S Ranch Tertiary EOCENE SERIES 1,280 39.953 –108.318 7/12/2000 1101

1542 Square S Ranch Quaternary ALLUVIUM,TERRACE 111 39.954 –108.285 7/11/2000 1711

1546 Square S Ranch Unknown Not available 1,755 39.965 –108.355 10/6/1983 1100

1547 Square S Ranch Tertiary GREEN RIVER FORMATION 1,755 39.965 –108.355 10/4/1983 1800

1549 Square S Ranch Tertiary GREEN RIVER FORMATION –9,999 39.978 –108.253 7/11/1973 1030

1552 Square S Ranch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.993 –108.355 9/12/1973 930

1555 Square S Ranch Cretaceous MESAVERDE GROUP 12,700 39.878 –108.294 1/30/2002 9999

1558 Veatch Gulch Quaternary ALLUVIUM,TERRACE 50 39.942 –107.774 8/2/1979 0

1559 Veatch Gulch Pennsylvanian UPPER PENNSYLVANIAN SERIES 86 39.947 –107.772 7/8/1982 0

1560 Veatch Gulch Pennsylvanian PERMIAN 

PENNSYLVANIAN SYSTEMS

85 39.949 –107.781 7/8/1982 0

1561 Veatch Gulch Quaternary ALLUVIUM,TERRACE 112 39.961 –107.796 8/2/1979 0

1565 Veatch Gulch Quaternary ALLUVIUM,FLOOD PLAIN 50 39.976 –107.811 7/8/1982 0

1566 Veatch Gulch Unknown Not available 45 39.983 –107.821 8/14/1981 0

1567 Veatch Gulch Unknown Not available 30 39.989 –107.826 8/15/1981 0

1568 Veatch Gulch Unknown Not available 35 39.998 –107.832 8/12/1981 0

1571 White River City Tertiary GREEN RIVER FORMATION –9,999 40.005 –108.191 6/27/1973 1300

1576 White River City Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.008 –108.248 9/6/1973 1430

1580 White River City Tertiary GREEN RIVER FORMATION –9,999 40.009 –108.210 6/27/1973 1430

1581 White River City Unknown Not available 2,400 40.012 –108.221 7/17/1980 735

1587 White River City Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.077 –108.237 9/6/1973 1730

1592 White River City Quaternary ALLUVIUM,TERRACE 60 40.090 –108.225 7/10/1982 0

1593 White River City Unknown Not available –9,999 40.006 –108.191 9/16/1977 1200

1594 White Rock Unknown Not available –9,999 40.202 –108.020 7/1/1975 0

1595 White Rock Unknown Not available 40 40.177 –108.008 7/1/1975 0

1596 White Rock Quaternary ALLUVIUM,FLOOD PLAIN 14 40.185 –108.009 7/1/1975 0

1597 White Rock Quaternary ALLUVIUM,FLOOD PLAIN 30 40.211 –108.027 7/1/1975 0

1598 White Rock Unknown Not available 60 40.218 –108.025 7/28/1975 0

1599 White Rock Unknown Not available –9,999 40.164 –108.080 9/20/1977 1300

1600 Wolf Ridge Unknown Not available –9,999 39.981 –108.443 9/16/1977 1600

1601 Wolf Ridge Unknown Not available 600 39.891 –108.386 9/15/1977 1100

1602 Wolf Ridge Unknown Not available –9,999 39.896 –108.451 11/28/1971 1000

1603 Wolf Ridge Unknown Not available –9,999 39.921 –108.496 5/7/1975 1530

1604 Wolf Ridge Unknown Not available –9,999 39.923 –108.485 5/27/1975 1400

1605 Wolf Ridge Unknown Not available –9,999 39.923 –108.485 1/8/1975 1305
Appendix 99

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1607 Wolf Ridge Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.877 –108.480 8/31/1973 1130

1609 Wolf Ridge Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.891 –108.390 8/31/1973 930

1610 Wolf Ridge Tertiary GREEN RIVER FORMATION –9,999 39.893 –108.488 9/9/1973 2050

1612 Wolf Ridge Tertiary GREEN RIVER FORMATION –9,999 39.897 –108.450 8/2/1973 1700

1613 Wolf Ridge Unknown Not available 3,100 39.911 –108.376 8/26/1983 1245

1614 Wolf Ridge Tertiary GREEN RIVER FORMATION 1,185 39.911 –108.376 8/30/1983 1545

1617 Wolf Ridge Tertiary GREEN RIVER FORMATION –9,999 39.923 –108.485 8/9/1973 1500

1622 Yankee Gulch Unknown Not available –9,999 39.766 –108.382 11/21/1974 2200

1623 Yankee Gulch Unknown Not available –9,999 39.846 –108.379 11/5/1976 1030

1626 Yankee Gulch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.843 –108.388 8/3/1973 1030

1628 Yankee Gulch Quaternary ALLUVIUM,FLOOD PLAIN –9,999 39.848 –108.378 8/3/1973 1100

1631 Unknown Not available –9,999 39.07 –108.5 10/18/2000 9999

1632 Badger Wash Unknown Not available –9,999 39.275 –108.901 9/20/1977 1515

1633 Badger Wash Cretaceous MANCOS SHALE 35 39.266 –108.901 2/21/1992 900

1634 Badger Wash Cretaceous MANCOS SHALE 19 39.275 –108.883 2/21/1992 1000

1635 Badger Wash Cretaceous MANCOS SHALE 40 39.290 –108.952 3/27/2001 1040

1636 Badger Wash Cretaceous MANCOS SHALE 37 39.290 –108.956 3/27/2001 1215

1639 Clifton Unknown Not available –9,999 39.053 –108.484 5/16/2000 900

1640 Clifton Unknown Not available –9,999 39.061 –108.483 7/29/1998 1000

1641 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.049 –108.499 3/30/2000 1325

1642 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.051 –108.499 5/16/2000 1050

1643 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.051 –108.495 5/16/2000 1000

1644 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.052 –108.492 5/16/2000 940

1645 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.052 –108.499 3/30/2000 1300

1646 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.052 –108.488 3/30/2000 1035

1647 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.052 –108.492 3/30/2000 1220

1648 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.053 –108.488 5/16/2000 925

1649 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.055 –108.485 3/30/2000 1025

1650 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.060 –108.489 5/5/1998 1115

1651 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.061 –108.481 7/29/1998 910

1652 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.061 –108.483 7/29/1998 950

1653 Clifton Quaternary QUATERNARY SYSTEM –9,999 39.061 –108.486 7/29/1998 1025

1654 Clifton Quaternary QUATERNARY SYSTEM 46.8 39.072 –108.497 3/10/1992 900

1655 Clifton Unknown Not available –9,999 39.07 –108.43 10/17/2000 9999

1656 Clifton Unknown Not available –9,999 39.08 –108.42 10/17/2000 9999

1657 Clifton Unknown Not available –9,999 39.08 –108.43 10/17/2000 9999

1658 Clifton Unknown Not available –9,999 39.06 –108.45 10/18/2000 9999

1659 Clifton Unknown Not available –9,999 39.06 –108.49 10/18/2000 9999

1660 Collbran Unknown Not available –9,999 39.195 –107.942 9/7/1977 1455

1661 Collbran Unknown Not available –9,999 39.196 –107.970 9/7/1977 1520

1662 Collbran Unknown Not available –9,999 39.231 –107.961 8/1/1977 1445

1664 Collbran Unknown Not available 60 39.200 –107.972 6/10/1997 9999

1665 Collbran Unknown Not available 45 39.196 –107.943 6/10/1997 9999

1666 Collbran Unknown Not available 80 39.226 –107.987 2/25/2004 9999

1667 Collbran Tertiary WASATCH FORMATION 110 39.207 –107.990 2/25/2004 9999

1668 Collbran Tertiary WASATCH FORMATION 400 39.243 –107.941 2/26/2004 9999

1669 Collbran Unknown Not available 200 39.24 –107.94 8/19/1998 9999

1670 Colorado National Monument Unknown Not available –9,999 39.104 –108.730 8/13/1977 1400

1671 Colorado National Monument Unknown Not available –9,999 39.036 –108.628 5/30/1972 1120

1672 Colorado National Monument Unknown Not available –9,999 39.104 –108.670 9/20/1977 1800

1673 Colorado National Monument Unknown Not available –9,999 39.104 –108.650 3/3/1997 1300

1674 Colorado National Monument Unknown Not available –9,999 39.106 –108.654 2/11/1998 900

1675 Colorado National Monument Unknown Not available –9,999 39.107 –108.655 6/6/2002 940

1676 Colorado National Monument Unknown Not available 350 39.035 –108.628 8/13/1977 1200

1677 Colorado National Monument Jurrassic BRUSHY BASIN SHALE MEMBER 

OF MORRISON FORMATION

210 39.079 –108.661 5/8/1991 900

1678 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.103 –108.650 2/11/1998 1105

1679 Colorado National Monument Quaternary QUATERNARY SYSTEM 22.5 39.104 –108.645 4/1/2003 1610

1680 Colorado National Monument Quaternary QUATERNARY SYSTEM 18 39.104 –108.646 4/1/2003 1520

1681 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.650 2/18/1998 800

1682 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.103 –108.646 7/24/1998 950

1683 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.102 –108.648 7/17/1997 1215

1684 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.103 –108.650 4/1/1998 1120

1685 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.650 4/1/1998 1145

1686 Colorado National Monument Quaternary QUATERNARY SYSTEM 17 39.106 –108.647 4/1/2003 1425

1687 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.103 –108.649 4/2/1998 950
100 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1688 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.103 –108.649 4/2/1998 1000

1689 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.103 –108.649 2/12/1998 1015

1690 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.650 3/3/1997 1330

1691 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.647 7/24/1998 938

1692 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.650 4/2/1998 915

1693 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.650 2/11/1998 1020

1694 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.648 4/2/1998 1030

1695 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.648 7/24/1998 912

1696 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.648 2/18/1998 1045

1697 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.649 4/2/1998 930

1699 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.104 –108.651 4/1/1998 1215

1700 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.105 –108.649 2/18/1998 1010

1701 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.105 –108.652 4/1/1998 725

1702 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.105 –108.651 7/17/1997 1105

1703 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.105 –108.653 4/1/1998 835

1704 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.648 4/2/1998 1135

1705 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.105 –108.649 7/24/1998 925

1706 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.652 7/24/1998 838

1707 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.652 2/10/1998 1130

1708 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.652 2/10/1998 1040

1709 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.654 3/5/1997 1200

1710 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.105 –108.655 4/1/1998 915

1711 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.651 7/24/1998 843

1712 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.106 –108.653 4/1/1998 945

1713 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.107 –108.655 7/17/1997 940

1714 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.107 –108.656 2/10/1998 915

1715 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.107 –108.655 4/1/1998 1000

1716 Colorado National Monument Quaternary QUATERNARY SYSTEM –9,999 39.107 –108.656 4/1/1998 1030

1723 De Beque Quaternary ALLUVIUM,TERRACE 42 39.359 –108.249 5/18/1979 1600

1727 Fruita Unknown Not available –9,999 39.159 –108.683 8/9/1977 1100

1728 Fruita Unknown Not available –9,999 39.189 –108.682 8/9/1977 1145

1730 Glade Park Unknown Not available –9,999 38.976 –108.673 8/15/1977 1100

1731 Grand Junction Jurrassic ENTRADA SANDSTONE 940 39.042 –108.548 7/13/1981 0

1732 Grand Junction Unknown MESOZOIC ERATHEM 1,213 39.047 –108.568 4/2/1991 830

1733 Grand Junction Jurrassic ENTRADA SANDSTONE 1,380 39.049 –108.521 4/21/1981 1630

1734 Grand Junction Quaternary QUATERNARY SYSTEM –9,999 39.050 –108.501 5/16/2000 1020

1735 Grand Junction Quaternary QUATERNARY SYSTEM –9,999 39.051 –108.500 3/30/2000 1425

1736 Grand Junction Quaternary QUATERNARY SYSTEM –9,999 39.052 –108.500 3/30/2000 1430

1738 Grand Junction Unknown Not available 810 39.058 –108.580 8/16/1977 1330

1741 Grand Junction Unknown Not available –9,999 39.05 –108.53 10/19/2000 9999

1742 Grand Junction Unknown Not available –9,999 39.05 –108.58 10/26/2000 9999

1743 Grand Junction Unknown Not available –9,999 39.04 –108.58 10/26/2000 9999

1744 Grand Junction Unknown Not available –9,999 39.04 –108.57 10/26/2000 9999

1745 Hawxhurst Creek Unknown Not available 125 39.263 –107.962 6/11/1997 9999

1747 Highline Lake Cretaceous MANCOS SHALE 88.1 39.315 –108.852 6/3/1992 900

1752 Housetop Mountain Unknown Not available –9,999 39.355 –108.078 10/19/2006 9999

1753 Housetop Mountain Unknown Not available –9,999 39.359 –108.087 7/7/2006 9999

1754 Housetop Mountain Unknown Not available –9,999 39.362 –108.087 7/7/2006 9999

1755 Housetop Mountain Unknown Not available –9,999 39.358 –108.081 9/29/2006 9999

1756 Housetop Mountain Unknown Not available –9,999 39.365 –108.089 7/6/2006 9999

1757 Housetop Mountain Unknown Not available –9,999 39.355 –108.075 7/20/2006 9999

1758 Housetop Mountain Unknown Not available –9,999 39.361 –108.082 3/14/2007 9999

1759 Housetop Mountain Unknown Not available –9,999 39.351 –108.075 7/20/2006 9999

1760 Housetop Mountain Unknown Not available –9,999 39.354 –108.071 7/20/2006 9999

1761 Indian Point Unknown Not available 46 38.997 –108.217 5/7/2002 9999

1762 Juniata Reservoir Quaternary QUATERNARY SYSTEM 123 38.937 –108.356 6/24/1981 0

1763 Juniata Reservoir Unknown Not available –9,999 38.960 –108.304 9/2/1977 1000

1765 Mack Cretaceous MANCOS SHALE 27.85 39.182 –108.813 2/19/1992 1200

1766 Mack Cretaceous MANCOS SHALE 28 39.201 –108.795 5/29/1992 1000

1768 Mack Cretaceous MANCOS SHALE 20 39.202 –108.795 2/18/1992 1130

1769 Mack Cretaceous MANCOS SHALE 29.9 39.207 –108.792 2/18/1992 1400

1770 Mesa Unknown Not available –9,999 39.137 –108.136 9/7/1977 1100

1771 Mesa Unknown Not available –9,999 39.159 –108.161 9/1/1977 0

1772 Mesa Unknown Not available –9,999 39.183 –108.133 9/7/1977 950

1773 Mesa Unknown Not available –9,999 39.154 –108.146 6/11/1997 9999

1774 Mesa Unknown Not available 200 39.161 –108.144 10/18/1999 9999
Appendix 101

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1776 Mesa Unknown Not available 350 39.217 –108.156 6/11/1997 9999

1777 Mesa Unknown Not available 300 39.159 –108.174 6/11/1997 9999

1778 Mesa Unknown Not available 100 39.148 –108.150 7/10/1997 9999

1779 Mesa Unknown Not available 85 39.137 –108.153 7/10/1997 9999

1780 Mesa Unknown Not available 30 39.153 –108.133 7/10/1997 9999

1781 Mesa Unknown Not available 35 39.155 –108.128 7/10/1997 9999

1782 Mesa Tertiary WASATCH FORMATION 500 39.165 –108.181 2/23/2004 9999

1783 Mesa Tertiary WASATCH FORMATION 500 39.162 –108.182 2/24/2004 9999

1784 Mesa Tertiary WASATCH FORMATION 480 39.176 –108.142 2/25/2004 9999

1785 Mesa Unknown Not available 60 39.166 –108.127 2/23/2004 9999

1786 Mesa Tertiary WASATCH FORMATION 125 39.180 –108.128 2/24/2004 9999

1787 Mesa Lakes Unknown Not available –9,999 39.050 –108.091 9/7/1977 9999

1788 Mesa Lakes Unknown Not available –9,999 39.091 –108.091 4/19/2006 9999

1789 Molina Unknown Not available –9,999 39.232 –108.005 9/5/1977 1900

1790 Molina Unknown Not available –9,999 39.163 –108.031 9/6/1977 1000

1791 Molina Unknown Not available –9,999 39.131 –108.033 9/6/1977 1000

1792 Molina Unknown Not available –9,999 39.196 –108.017 9/6/1977 1100

1793 Molina Unknown Not available –9,999 39.189 –108.062 9/6/1977 1200

1794 Molina Unknown Not available –9,999 39.166 –108.122 9/7/1977 1030

1795 Molina Unknown Not available –9,999 39.189 –108.054 7/28/1977 1245

1796 Molina Unknown Not available –9,999 39.155 –108.033 6/10/1997 9999

1797 Molina Unknown Not available 40 39.184 –108.113 6/10/1997 9999

1798 Molina Unknown Not available 20 39.183 –108.042 6/10/1997 9999

1799 Molina Unknown Not available 31 39.196 –108.025 6/10/1997 9999

1800 Molina Unknown Not available 35 39.190 –108.092 6/10/1997 9999

1801 Molina Unknown Not available 30 39.166 –108.123 6/11/1997 9999

1802 Molina Unknown Not available 40 39.178 –108.113 7/10/1997 9999

1803 Molina Unknown Not available 60 39.167 –108.093 7/10/1997 9999

1804 Molina Unknown Not available 89 39.157 –108.069 7/10/1997 9999

1805 Molina Unknown Not available 150 39.147 –108.048 7/10/1997 9999

1806 Molina Unknown Not available 120 39.139 –108.047 7/10/1997 9999

1807 Molina Cretaceous FOX HILLS FORMATION 700 39.173 –108.106 2/18/2003 1215

1807 Molina Cretaceous FOX HILLS FORMATION 700 39.173 –108.106 2/18/2003 1200

1808 Molina Unknown Not available 46 39.205 –108.045 2/23/2004 9999

1809 Molina Tertiary WASATCH FORMATION 127 39.180 –108.066 2/24/2004 9999

1810 Molina Tertiary WASATCH FORMATION 108 39.188 –108.065 2/25/2004 9999

1811 Molina Unknown Not available –9,999 39.178 –108.030 1/19/2007 9999

1812 Molina Unknown Not available –9,999 39.176 –108.030 1/19/2007 9999

1813 Molina Unknown Not available –9,999 39.200 –108.043 4/26/2006 9999

1814 Molina Unknown Not available –9,999 39.196 –108.028 4/24/2006 9999

1815 Molina Unknown Not available 150 39.17 –108.1 8/20/1998 9999

1816 Molina Unknown Not available –9,999 39.180 –108.028 1/19/2007 9999

1817 Molina Unknown Not available –9,999 39.181 –108.033 1/19/2007 9999

1818 Molina Unknown Not available –9,999 39.195 –108.027 2/28/2006 9999

1819 Molina Unknown Not available –9,999 39.17 –108.09 8/20/1998 9999

1820 Molina Unknown Not available –9,999 39.182 –108.042 4/10/2007 9999

1821 Molina Unknown Not available –9,999 39.193 –108.030 4/24/2006 9999

1822 Molina Unknown Not available –9,999 39.195 –108.030 4/24/2006 9999

1827 Palisade Unknown Not available 50 39.008 –108.311 10/28/2008 9999

1828 Palisade Unknown Not available 80 39.009 –108.317 10/28/2008 9999

1829 Ruby Lee Reservoir Cretaceous MANCOS SHALE 100 39.270 –108.729 6/3/1992 1200

1830 Vega Reservoir Unknown Not available –9,999 39.219 –107.792 9/7/1977 1605

1832 Vega Reservoir Unknown Not available –9,999 39.227 –107.812 6/11/1997 9999

1833 Wagon Track Ridge Unknown Not available –9,999 39.318 –108.272 8/18/1977 1420

1837 Wagon Track Ridge Quaternary ALLUVIUM,TERRACE 47 39.358 –108.250 5/15/1979 1430

1842 Whitewater Cretaceous MANCOS SHALE 25 38.977 –108.435 11/15/2001 1315

1843 Whitewater Cretaceous MANCOS SHALE 23 38.988 –108.444 11/15/2001 1200

1845 Whitewater Unknown MESOZOIC ERATHEM 1,100 38.990 –108.473 6/18/1981 0

1847 Whitewater Cretaceous MANCOS SHALE 29.6 38.992 –108.449 11/15/2001 935

1855 Bowie Unknown Not available –9,999 38.984 –107.507 5/29/2002 9999

1856 Bowie Unknown Not available –9,999 38.982 –107.508 5/29/2002 9999

1857 Bowie Unknown Not available –9,999 38.963 –107.616 5/17/2002 9999

1858 Bowie Unknown Not available –9,999 38.954 –107.623 5/17/2002 9999

1859 Bowie Unknown Not available –9,999 38.955 –107.616 5/17/2002 9999

1860 Bowie Unknown Not available –9,999 38.948 –107.624 6/23/2000 9999

1861 Bowie Unknown Not available –9,999 38.948 –107.625 6/23/2002 9999
102 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1862 Bowie Unknown Not available 74 38.923 –107.624 6/23/2002 9999

1863 Bowie Unknown Not available 170 38.888 –107.601 7/7/2002 9999

1864 Bowie Cretaceous MESAVERDE GROUP –9,999 38.926 –107.562 12/6/2006 9999

1865 Bowie Cretaceous MESAVERDE GROUP –9,999 38.930 –107.552 11/22/2002 9999

1866 Bowie Cretaceous MESAVERDE GROUP –9,999 38.930 –107.543 8/10/1995 9999

1867 Bowie Cretaceous MESAVERDE GROUP –9,999 38.926 –107.561 12/6/2006 9999

1868 Bowie Cretaceous MESAVERDE GROUP –9,999 38.925 –107.555 12/6/2006 9999

1869 Bowie Cretaceous MESAVERDE GROUP –9,999 38.919 –107.597 10/9/2003 9999

1870 Bowie Cretaceous MESAVERDE GROUP –9,999 38.958 –107.540 11/21/2006 9999

1871 Bowie Quaternary ALLUVIUM –9,999 38.920 –107.540 11/20/2006 9999

1872 Bowie Quaternary ALLUVIUM –9,999 38.917 –107.542 11/20/2006 9999

1873 Bowie Quaternary ALLUVIUM –9,999 38.922 –107.536 9/18/2006 9999

1874 Bowie Quaternary ALLUVIUM –9,999 38.923 –107.534 12/29/2003 9999

1875 Bowie Quaternary ALLUVIUM –9,999 38.919 –107.546 11/20/2006 9999

1876 Bowie Quaternary ALLUVIUM –9,999 38.919 –107.545 11/20/2006 9999

1877 Bowie Quaternary ALLUVIUM –9,999 38.919 –107.544 11/20/2006 9999

1878 Bowie Quaternary ALLUVIUM –9,999 38.922 –107.541 11/20/2006 9999

1879 Bowie Quaternary ALLUVIUM –9,999 38.922 –107.540 11/20/2006 9999

1880 Bowie Quaternary ALLUVIUM –9,999 38.922 –107.540 11/20/2006 9999

1881 Bowie Quaternary ALLUVIUM –9,999 38.918 –107.546 11/20/2006 9999

1882 Bowie Quaternary ALLUVIUM –9,999 38.918 –107.545 9/29/2000 9999

1883 Bowie Quaternary ALLUVIUM –9,999 38.918 –107.545 11/20/2006 9999

1884 Bowie Unknown Not available –9,999 38.900 –107.608 6/20/2001 9999

1885 Bowie Quaternary ALLUVIUM –9,999 38.893 –107.575 11/26/2006 9999

1886 Bowie Quaternary ALLUVIUM –9,999 38.886 –107.584 11/26/2006 9999

1887 Bowie Unknown Not available 27 38.91 –107.56 8/26/1998 9999

1888 Bowie Unknown Not available –9,999 38.921 –107.624 6/23/2002 9999

1889 Bowie Unknown Not available –9,999 38.886 –107.600 7/7/2002 9999

1890 Bowie Unknown Not available –9,999 38.89 –107.58 3/31/1998 9999

1891 Cedaredge Cretaceous MESAVERDE GROUP 75 38.925 –107.940 8/26/1981 1100

1895 Cedaredge Cretaceous MESAVERDE GROUP 119 38.937 –107.963 7/24/1981 1530

1896 Cedaredge Cretaceous MESAVERDE GROUP 253 38.937 –107.963 8/11/1981 1000

1897 Cedaredge Cretaceous MESAVERDE GROUP 118 38.937 –107.983 7/7/1981 1630

1898 Cedaredge Cretaceous MESAVERDE GROUP 55 38.937 –107.960 7/7/1981 1250

1899 Cedaredge Cretaceous MESAVERDE GROUP 100 38.938 –107.960 7/30/1981 1130

1900 Cedaredge Cretaceous MESAVERDE GROUP 140 38.938 –107.985 7/8/1981 930

1904 Cedaredge Tertiary TERTIARY SYSTEM 66 38.946 –107.962 9/18/1974 1300

1906 Cedaredge Quaternary QUATERNARY SYSTEM 162 38.954 –107.938 7/30/1981 0

1907 Cedaredge Cretaceous MESAVERDE GROUP 120 38.956 –107.945 8/26/1981 1400

1908 Cedaredge Cretaceous MESAVERDE GROUP 203 38.965 –107.963 7/24/1981 0

1909 Cedaredge Unknown Not available –9,999 38.947 –107.919 6/25/2002 9999

1910 Cedaredge Unknown Not available –9,999 38.998 –107.960 6/9/2005 9999

1911 Cedaredge Unknown Not available –9,999 38.935 –107.977 5/16/2002 9999

1912 Cedaredge Unknown Not available –9,999 38.955 –107.886 6/4/2002 9999

1913 Cedaredge Unknown Not available 85 38.96 –107.93 8/25/1998 9999

1914 Cedaredge Unknown Not available 95 38.95 –107.93 8/25/1998 9999

1915 Cedaredge Unknown Not available –9,999 38.936 –107.960 7/17/2002 9999

1916 Cedaredge Unknown Not available –9,999 38.930 –107.982 4/26/2002 9999

1917 Cedaredge Unknown Not available –9,999 38.930 –107.982 4/26/2002 9999

1918 Cedaredge Unknown Not available –9,999 38.943 –107.987 5/7/2002 9999

1919 Chalk Mountain Unknown Not available –9,999 39.006 –107.642 6/5/2002 9999

1920 Chalk Mountain Unknown Not available –9,999 39.005 –107.634 6/11/2002 9999

1921 Chalk Mountain Unknown Not available –9,999 39.008 –107.633 6/11/2002 9999

1925 Delta Cretaceous MANCOS SHALE 8 38.719 –108.013 3/2/1992 1300

1926 Delta Cretaceous MANCOS SHALE 18 38.725 –108.009 5/28/1992 1100

1928 Delta Quaternary ALLUVIUM,TERRACE 42 38.742 –108.025 9/19/1974 1000

1930 Delta Unknown Not available –9,999 38.672 –108.041 8/29/1977 1000

1931 Delta Unknown Not available –9,999 38.686 –108.097 8/29/1977 1200

1932 Delta Unknown Not available –9,999 38.724 –108.103 8/29/1977 1300

1937 Dry Creek Unknown Not available –9,999 38.883 –107.833 6/6/2002 9999

1938 Dry Creek Unknown Not available –9,999 38.942 –107.766 6/21/2002 9999

1939 Dry Creek Unknown Not available –9,999 38.953 –107.755 7/7/2002 9999

1940 Dry Creek Unknown Not available –9,999 38.982 –107.868 5/7/2002 9999

1941 Dry Creek Unknown Not available –9,999 38.973 –107.871 6/4/2002 9999

1942 Dry Creek Unknown Not available –9,999 38.978 –107.870 6/4/2002 9999

1943 Dry Creek Unknown Not available –9,999 38.982 –107.862 4/26/2002 9999
Appendix 103

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

1944 Electric Mountain Unknown Not available –9,999 39.077 –107.580 7/11/1978 0

1945 Electric Mountain Unknown Not available –9,999 39.077 –107.597 7/11/1978 0

1946 Electric Mountain Unknown Not available –9,999 39.030 –107.513 5/30/2002 9999

1947 Electric Mountain Unknown Not available –9,999 39.021 –107.509 5/30/2002 9999

1951 Grand View Mesa Unknown Not available –9,999 38.74 –107.64 9/15/1998 9999

1955 Gray Reservoir Cretaceous MESAVERDE GROUP 922 38.919 –107.650 8/3/1982 1100

1962 Gray Reservoir Cretaceous MESAVERDE GROUP 1,655 38.926 –107.652 8/4/1982 1144

1967 Gray Reservoir Unknown Not available –9,999 38.941 –107.737 5/1/2002 9999

1968 Gray Reservoir Unknown Not available –9,999 38.926 –107.732 5/1/2002 9999

1969 Gray Reservoir Unknown Not available –9,999 38.938 –107.737 5/2/2002 9999

1970 Gray Reservoir Unknown Not available –9,999 38.935 –107.733 5/2/2002 9999

1971 Gray Reservoir Unknown Not available –9,999 38.991 –107.628 6/3/2002 9999

1972 Gray Reservoir Unknown Not available –9,999 38.946 –107.628 6/23/2002 9999

1973 Gray Reservoir Unknown Not available –9,999 38.885 –107.626 6/5/2002 9999

1974 Gray Reservoir Unknown Not available –9,999 39.000 –107.635 6/5/2002 9999

1975 Gray Reservoir Unknown Not available –9,999 38.906 –107.742 6/6/2002 9999

1976 Gray Reservoir Cretaceous MESAVERDE GROUP –9,999 38.922 –107.647 6/25/2003 9999

1978 Hells Kitchen Cretaceous MESAVERDE GROUP 232 38.893 –108.078 8/11/1981 1530

1981 Hotchkiss Unknown Not available –9,999 38.787 –107.735 10/15/1998 1250

1982 Hotchkiss Unknown Not available –9,999 38.793 –107.729 10/15/1998 1311

1983 Hotchkiss Quaternary GLACIAL COLLUVIUM 132 38.800 –107.740 3/23/1979 0

1986 Hotchkiss Quaternary ALLUVIUM,TERRACE –9,999 38.812 –107.746 6/20/2000 1315

1990 Hotchkiss Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

1,386 38.832 –107.683 7/31/1979 0

1993 Hotchkiss Quaternary GLACIAL COLLUVIUM 60 38.849 –107.675 8/29/1979 0

1995 Hotchkiss Unknown Not available –9,999 38.82 –107.69 3/31/1998 9999

1996 Hotchkiss Unknown Not available –9,999 38.83 –107.68 4/1/1998 9999

2001 Lazear Quaternary TERRACE DEPOSITS –9,999 38.793 –107.785 8/18/1977 1000

2002 Lazear Quaternary GLACIAL COLLUVIUM 140 38.800 –107.762 4/15/1978 1130

2003 Lazear Unknown Not available 119 38.802 –107.780 3/23/1979 0

2011 Lazear Quaternary GLACIAL COLLUVIUM 99 38.871 –107.793 8/30/1979 0

2012 Lazear Quaternary ALLUVIUM,TERRACE 40 38.872 –107.834 9/18/1981 0

2013 Lazear Unknown Not available –9,999 38.864 –107.832 6/6/2002 9999

2014 Lazear Unknown Not available –9,999 38.867 –107.787 6/21/2002 9999

2015 Lazear Unknown Not available 110 38.869 –107.787 6/21/2002 9999

2016 Lazear Unknown Not available 90 38.84 –107.8 8/26/1998 9999

2017 Lazear Unknown Not available 55 38.87 –107.8 8/26/1998 9999

2018 Lazear Unknown Not available –9,999 38.87 –107.81 8/26/1998 9999

2019 Lazear Unknown Not available –9,999 38.83 –107.87 3/31/1998 9999

2020 Lazear Unknown Not available –9,999 38.83 –107.82 3/31/1998 9999

2021 Lazear Unknown Not available –9,999 38.77 –107.77 4/1/1998 9999

2022 Lazear Unknown Not available –9,999 38.78 –107.78 4/1/1998 9999

2023 Lazear Unknown Not available –9,999 38.78 –107.84 4/1/1998 9999

2024 Lazear Unknown Not available –9,999 38.85 –107.85 4/1/1998 9999

2025 Leon Peak Unknown Not available 96 39.006 –107.849 6/27/2007 1100

2027 Olathe NW Cretaceous MANCOS SHALE 26 38.712 –107.961 3/4/1992 1300

2029 Orchard City Quaternary QUATERNARY SYSTEM 177 38.831 –107.902 8/4/1981 0

2030 Orchard City Unknown Not available –9,999 38.8 –107.97 4/1/1998 9999

2033 Paonia Cretaceous MANCOS SHALE 66 38.846 –107.558 9/17/1974 1400

2034 Paonia Unknown Not available –9,999 38.87 –107.59 3/31/1998 9999
104 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Map

name

Geologic

unit

Aquifer

description

Well

depth

(ft)

Latitude

(decimal

degrees,

NAD83)

Longitude

(decimal

degrees,

NAD83)

Collection

date

Collection

time

2035 Paonia Unknown Not available –9,999 38.86 –107.62 4/1/1998 9999

2037 Chair Mountain Unknown Not available 46 39.049 –107.362 7/13/1978 0

2040 Citadel Plateau Unknown Not available –9,999 40.261 –108.150 9/12/1977 1800

2041 Delta Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

230 38.629 –108.100 8/25/1981 1230

2044 Delta Quaternary VALLEY-FILL DEPOSITS 71 38.644 –108.028 5/8/1974 1100

2046 Delta Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

693 38.646 –108.045 7/3/1991 930

2046 Delta Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

693 38.646 –108.045 7/3/1991 1100

2049 Delta Unknown Not available –9,999 38.633 –108.103 8/27/1977 1800

2050 Delta Unknown Not available –9,999 38.630 –108.118 8/29/1977 800

2051 Delta Unknown Not available –9,999 38.651 –108.078 8/29/1977 900

2052 Elk Springs Unknown Not available –9,999 40.324 –108.376 9/12/1977 1100

2053 Grand View Mesa Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

–9,999 38.668 –107.671 8/18/1977 1330

2054 Grizzly Ridge Quaternary VALLEY-FILL DEPOSITS 50 38.524 –107.745 5/7/1974 1300

2055 Haystack Rock Unknown Not available –9,999 40.413 –108.715 9/17/1977 900

2056 Hoovers Corner Quaternary ALLUVIUM,TERRACE 36 38.573 –108.033 7/30/1982 0

2058 Hoovers Corner Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

265 38.577 –108.049 5/8/1974 800

2061 Hoovers Corner Quaternary QUATERNARY SYSTEM 60 38.606 –108.023 3/4/1992 1100

2063 Hoovers Corner Cretaceous DAKOTA SANDSTONE OR 

FORMATION OR GROUP

390 38.621 –108.061 8/5/1982 0

2064 Hoovers Corner Unknown Not available –9,999 38.591 –108.015 8/27/1977 1100

2065 Lazy Y Point Pennsylvanian WEBER FORMATION 750 40.262 –108.862 10/19/1972 0

2066 Lazy Y Point Pennsylvanian WEBER FORMATION 750 40.262 –108.862 10/1/1972 0

2067 Lazy Y Point Unknown Not available –9,999 40.262 –108.862 9/24/1977 1100

2068 M F Mountain Jurrassic ENTRADA SANDSTONE 54 40.280 –108.608 7/14/1958 0

2069 M F Mountain Unknown Not available –9,999 40.311 –108.606 9/14/1977 1500

2070 M F Mountain Unknown Not available –9,999 40.274 –108.606 9/14/1977 1600

2071 Mellen Hill Pennsylvanian WEBER FORMATION 1400 40.247 –108.901 5/10/1973 0

2072 Mellen Hill Unknown Not available –9,999 40.245 –108.973 9/19/1977 1300

2076 Olathe NW Cretaceous MANCOS SHALE –9,999 38.650 –107.980 2/23/2000 1130

2077 Paonia Reservoir Cretaceous MESAVERDE GROUP 28 38.933 –107.335 7/27/2004 1200

2078 Plug Hat Rock Jurrassic NAVAJO SANDSTONE 800 40.252 –108.979 7/22/1971 1700

2079 Plug Hat Rock Jurrassic NAVAJO SANDSTONE 1,400 40.251 –108.997 9/30/1958 0

2080 Plug Hat Rock Jurrassic NAVAJO SANDSTONE 800 40.252 –108.979 5/1/1969 0

2082 Plug Hat Rock Unknown Not available –9,999 40.251 –108.996 9/17/1977 1800

2083 Price Creek Quaternary ALLUVIUM,FLOOD PLAIN –9,999 40.253 –108.075 6/1/1975 0

2084 Price Creek Cretaceous MESAVERDE GROUP 160 40.278 –108.098 7/1/1975 0

2085 Price Creek Cretaceous MESAVERDE GROUP 180 40.307 –108.104 7/26/1975 0

2088 Skull Creek Pennsylvanian WEBER FORMATION 3,365 40.261 –108.713 2/1/1967 0

2089 Skull Creek Unknown Not available –9,999 40.370 –108.730 9/24/1977 1400

2090 Snake John Reef Jurrassic NAVAJO SANDSTONE 1,020 40.252 –109.003 9/30/1958 0

2091 Snake John Reef Jurrassic NAVAJO SANDSTONE 700 40.255 –109.014 10/3/1958 0

2094 Somerset Quaternary ALLUVIUM –9,999 38.941 –107.466 8/10/2006 9999

2095 Starvation Point Unknown Not available –9,999 38.427 –108.384 8/26/1977 1100

2096 Windy Point Unknown Not available –9,999 38.469 –108.503 8/26/1977 1600
Appendix 105

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1 779 8.85 31.9 -- 300 -- -- 387 16.0 20.0

2 700 8.1 13.5 -- 754 460 0 -- 15.0 5.60

3 500 8.8 11.0 -- 510 310 1 -- 41.0 18.0

4 660 9.3 13.0 -- 641 390 1 -- 20.0 6.70

5 6,590 6.79 13.6 8.5 -- 746 <1 5,370 243 176

6 600 7.1 13.0 -- -- -- -- -- -- --

8 1,650 8 21.5 -- -- -- -- -- -- --

9 570 7.88 15.3 1.5 252 -- -- 288 57.3 18.8

13 1,017 -- -- -- 392 -- -- -- 69.0 61.2

14 -- -- -- -- 467 -- -- -- 187 73.0

15 1,025 -- -- -- 423 -- -- -- 76.6 62.2

16 773 -- -- -- 337 -- -- -- 56.0 52.8

17 944 8.57 11.8 2.4 -- -- -- -- -- --

18 977 8.57 12.2 2.5 -- -- -- -- -- --

19 878 8.85 13.7 0.9 -- -- -- -- -- --

20 840 8.62 12.4 3.4 -- -- -- -- -- --

21 804 8.81 13.1 2.3 -- -- -- -- -- --

22 856 8.56 12.6 2.9 -- -- -- -- -- --

23 839 8.88 12.1 1.0 -- -- -- -- -- --

24 850 8.57 11.6 2.2 -- -- -- -- -- --

25 879 8.5 11.6 1.6 -- -- -- -- -- --

26 1,102 3.47 12.1 1.6 -- -- -- -- -- --

27 885 8.46 12.4 2.0 -- -- -- -- -- --

28 894 8.55 11.9 3.0 -- -- -- -- -- --

29 1,100 6.9 11.0 -- -- -- -- -- -- --

30 3,160 7.37 15.0 0.4 310 -- -- 3,000 220 180

31 1,600 8 16.5 -- -- -- -- -- -- --

33 1,600 7.5 9.0 -- -- -- -- -- -- --

34 1,120 7.6 9.0 -- -- -- -- -- -- --

36 800 7.6 9.0 -- -- -- -- -- -- --

38 925 7.3 18.0 -- 656 400 0 -- 76.0 48.0

39 870 8.4 18.0 -- 1,010 600 16 -- 12.0 13.0

40 1,100 7.4 -- -- 740 -- -- 690 84.0 53.0

41 800 7.7 -- -- 680 -- -- 510 67.0 39.0

42 -- 8.100 -- -- 247 405 0 550 54.5 30.4

43 890 7.8 -- -- 720 -- 600 520 60.0 41.0

44 960 7.7 -- -- 760 -- 634 560 60.0 45.0

45 1,000 7.8 -- -- 800 -- 667 640 61.0 48.0

46 720 8.1 -- -- 600 -- 500 450 57.0 34.0

47 470 8.1 -- -- 480 -- 400 260 46.0 21.0

48 650 7.6 -- -- 620 -- 517 380 48.0 28.0

49 1,000 7.6 -- -- 720 -- 600 670 71.0 50.0

50 1,640 7.2 11.7 2.8 445 542 -- 1,184 133 114

51 -- 7.390 -- -- 419 -- -- -- 270 110

52 -- 8.200 -- -- 391 -- -- -- 53.8 28.4

53 -- 7.520 -- -- 391 -- -- -- 68.0 38.0

54 -- 7.5 -- -- 270 -- -- -- 49.0 31.0

55 -- 7.700 -- -- 430 -- -- 490 80.9 25.0

56 1,070 7.080 -- -- 429 -- -- -- 130 76.0

57 1,420 7.270 -- 6.9 226 -- -- -- 150 34.0

58 -- 7.200 -- 6.5 473 -- -- -- 78.0 72.0

59 894 7.270 -- -- 523 -- -- -- 100 47.0

60 746 7.640 -- 9.8 404 -- -- -- 36.0 27.0

61 -- -- -- -- 370 -- -- -- -- --

62 -- 7.800 -- -- 470 -- -- -- -- --

63 911 7.640 6.4 1.9 -- -- -- -- -- --

64 -- -- -- -- -- -- -- -- -- --

65 1,390 7.600 8.9 1.5 -- -- -- -- -- --

66 1,396 8.090 8.3 3.9 -- -- -- -- -- --

67 910 8.100 6.6 1.5 369 -- -- -- 8.3 0.300

68 1,090 7.410 11.1 4.2 -- -- -- -- 68.0 34.0

69 1,610 7.57 10.4 3.9 -- -- -- 1,160 -- --

70 1,870 7.64 11.7 3.4 -- -- -- 1,590 -- --

71 1,149 7.35 12.6 1.1 -- -- -- -- 62.0 43.0
106 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

72 763 7.35 10.3 6.2 -- -- -- -- 67.0 35.0

73 897 7.50 6.6 -- -- -- -- -- 60.0 54.0

74 1,021 7.44 10.6 3.3 -- -- -- -- -- 58.0

75 969 7.25 11.2 3.0 -- -- -- -- 87.0 44.0

76 1,184 7.04 14.4 5.3 -- -- -- -- 140 44.0

77 1,404 8.70 7.6 2.0 352 344 8 -- 7.4 1.20

78 1,090 7.5 6.4 5.6 499 499 0 -- 21.3 3.80

79 865 7.72 15.4 11.4 1,279 -- <5 512 87.0 38.0

80 912 7.29 8.6 1.3 410 -- -- 530 64.0 35.0

81 598 7.45 11.3 7.8 1,154 -- <5 403 64.1 37.2

82 587 7.19 11.5 5.3 1,002 -- <5 407 76.3 24.8

83 1,335 7.26 11.1 2.9 1,524 -- <5 977 94.6 31.9

84 1,880 8.16 11.8 3.1 1,362 -- <5 766 69.2 18.1

85 1,300 7.03 12.4 1.2 1,108 -- <5 724 32.2 6.15

86 855 7.27 10.5 6.9 450 -- -- 860 76.0 39.0

87 1,773 7.96 8.2 2.5 1,293 -- <5 762 101 48.5

88 717 8.11 7.5 5.9 1,243 -- <5 452 72.6 29.8

89 751 8.38 12.8 2.0 1,015 -- <5 497 5.9 0.307

90 873 7.48 11.5 3.4 -- -- -- 551 -- --

91 1,404 8.7 7.6 2.0 352 -- -- 690 7.4 1.20

92 811 7.84 11.7 6.4 350 -- -- 500 79.0 44.0

93 960 8.21 10.5 7.2 319 -- -- 530 8.8 0.110

94 1,580 7.08 10.5 -- 429 -- -- 1,090 130 76.0

95 1,990 7.27 11.0 6.9 226 -- -- 1,360 150 34.0

96 1,186 7.27 11.2 -- 523 -- -- 704 100 47.0

97 1,084 7.2 12.6 6.5 473 -- -- 650 78.0 72.0

98 1,331 7.6 12.4 2.7 -- -- -- 931 -- --

99 804 7.61 11.8 2.7 -- -- -- 532 -- --

100 750 7.91 16.7 2.9 -- -- -- 494 -- --

101 1,218 6.77 15.0 3.6 -- -- -- 804 -- --

102 811 7.38 10.6 2.9 -- -- -- 508 -- --

103 653 7.38 8.6 3.1 -- -- -- 425 -- --

104 872 7.29 10.6 3.7 -- -- -- 542 -- --

105 944 7.58 18.1 2.1 -- -- -- 626 -- --

106 813 7.43 10.1 3.6 -- -- -- 521 -- --

107 752 8.29 7.4 3.6 -- -- -- 487 -- --

108 800 8.78 10.6 0.8 350 -- -- 450 6.5 0.190

109 6,980 8.86 11.6 0.5 265 -- -- 482 3.7 0.630

110 979 8.2 12.0 0.5 280 -- -- 638 14.7 5.91

111 884 8.26 5.4 -- 445 -- -- 512 56.0 65.0

112 736 7.34 12.4 0.6 333 -- -- 458 93.0 30.0

113 1,005 8.16 12.7 4.2 -- -- -- 740 -- --

114 1,163 7.45 12.9 1.8 -- -- -- 796 -- --

115 752 7.43 11.3 4.1 -- -- -- 479 -- --

116 688 7.19 13.0 1.2 -- -- -- -- -- --

117 1,114 7.39 10.0 4.2 -- -- -- 745 -- --

118 725 8.02 5.8 2.4 -- -- -- 462 -- --

119 745 7.37 11.6 3.0 -- -- -- 512 -- --

120 1,138 8.65 11.0 5.5 -- -- -- 786 -- --

121 1,304 7.27 13.5 3.7 -- -- -- 870 -- --

122 1,230 7.37 10.6 4.7 -- -- -- 824 -- --

123 1,299 7.67 9.4 4.7 -- -- -- 857 -- --

124 983 7.64 9.8 9.8 404 -- -- 599 36.0 27.0

125 941 8.29 7.0 2.2 500 -- -- 520 20.0 3.80

126 1,306.7 7.6 17.0 0.9 177 -- -- 690 39.1 3.90

127 590 7.69 11.6 4.4 347 -- -- 388 65.3 35.9

128 916 7.29 10.6 3.8 436 -- -- 624 42.0 29.0

129 977 7.4 10.8 3.1 424 -- -- 680 52.9 36.6

130 1,890 8.32 9.1 3.1 340 -- -- 1,400 230 30.0

131 1,800 7.36 10.8 0.5 310 -- -- 1,200 180 66.0

132 750 7.5 8.3 5.1 427 -- -- 490 71.6 35.4

133 664 8.35 11.3 7.4 344 -- -- 426 72.9 27.1

134 1,990 7.45 8.5 2.0 844 -- -- 1,520 45.4 16.2

135 706 6.8 12.0 4.0 -- -- -- 472 -- --
Appendix 107

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

138 34,000 -- 27.0 -- -- -- -- -- -- --

142 760 7.7 12.0 -- -- -- -- -- -- --

143 -- -- -- -- -- -- -- -- -- 44.0

144 0.72 8.12 13.8 6.7 -- -- -- -- 41.0 38.0

145 -- 7.90 -- -- 261 428 0 450 47.2 44.8

146 700 8.66 13.9 5.4 959 -- -- 450 54.0 31.0

147 3,550 8.52 14.4 3.4 550 -- -- 2,800 140 100

148 3,010 7.22 14.1 1.1 330 -- -- 2,700 210 170

149 616 8.42 13.9 4.8 270 -- -- 390 53.0 35.0

150 660 8.70 13.4 4.9 290 -- -- 420 58.0 37.0

151 1,950 8.89 15.2 3.1 240 -- -- 1,900 130 120

152 2,060 7.43 11.6 2.4 608 -- -- -- 78.0 150

153 -- 8.00 -- -- 567 -- -- -- 181 87.8

154 -- -- -- -- -- -- -- -- -- --

155 -- 7.38 -- -- 624 -- -- -- 71.0 57.0

157 -- 8.10 -- -- 499 -- -- -- 90.2 63.5

158 1,310 7.20 10.8 2.0 645 786 -- 863 83.5 53.2

159 1,190 7.25 11.9 1.5 488 595 -- 782 90.0 59.9

161 1,150 7.90 9.4 3.2 390 -- -- -- 10.1 1.50

162 1,430 8.30 11.0 0.1 354 308 61 922 8.3 0.248

163 2,460 7.90 9.1 0.2 402 491 -- 1,667 21.1 4.87

164 1,834 7.45 12.0 1.0 594 725 -- 1,169 16.6 4.65

165 1,232 7.51 11.1 8.6 505 616 -- 796 52.4 51.6

166 -- 7.90 -- -- 439 -- -- 1,270 31.6 24.5

167 -- 7.20 -- -- 503 -- -- 1,410 132 71.0

168 -- 8.00 -- -- 544 -- -- -- 100 47.8

169 -- -- -- -- -- -- -- -- -- --

169 -- 8.10 -- -- 520 -- -- -- 71.4 44.8

170 2,870 7.74 13.1 4.5 -- -- -- -- 120 61.0

171 -- 7.90 -- -- 403 -- -- -- 211 121

172 2,110 7.17 13.6 0.8 -- -- -- -- 58.0 68.0

173 5,970 8.11 12.8 1.4 280 -- -- -- 130 6.20

174 1,587 7.60 7.3 2.6 478 -- -- -- 44.6 5.00

175 2,130 7.32 11.9 8.9 400 -- -- -- 170 110

176 -- 8.10 -- -- 532 -- -- -- 66.4 50.6

177 -- 8.30 -- -- 177 -- -- -- 51.4 2.00

178 4,610 8.12 19.2 1.4 180 -- -- -- 64.0 3.40

179 -- 8.10 -- -- 583 -- -- -- 73.0 47.2

180 2,090 8.25 19.2 0.2 -- -- -- -- 14.0 1.00

181 6,450 7.77 13.9 0.7 270 -- -- -- 130 29.0

182 -- 8.20 -- -- 590 -- -- -- 26.0 15.5

182 -- -- -- -- -- -- -- -- -- --

183 -- 7.70 -- -- 463 -- -- -- 318 166

184 -- -- -- -- -- -- -- -- -- --

185 -- 8.00 -- -- 709 -- -- -- 63.4 23.8

186 -- 8.40 -- -- 386 -- -- -- 31.6 51.8

187 -- 8.71 -- -- -- -- -- -- 3.1 <0.1

187 -- -- -- -- -- -- -- -- -- --

188 -- 7.56 -- 8.2 841 -- -- -- 74.0 42.0

189 -- 8.40 -- -- 412 -- -- -- 41.5 5.70

189 -- -- -- -- -- -- -- -- -- --

191 3,780 8.09 17.2 7.0 180 -- -- -- 53.0 3.40

192 -- 7.47 -- 14.0 537 -- -- -- -- 96.0

193 1,640 7.08 11.8 8.4 490 -- -- -- 88.0 57.0

194 1,181 7.37 11.6 8.6 520 -- -- -- 61.0 47.0

195 -- 7.12 -- -- 143 -- -- -- 15.0 1.10

196 3,430 7.49 13.1 0.4 -- -- -- -- 93.0 26.0

197 -- 8.30 -- -- 528 -- -- -- 65.8 35.9

198 -- 8.20 -- -- 565 -- -- -- 84.9 36.5

199 -- 7.50 -- -- 441 -- -- -- 477 286

200 1,750 7.39 12.8 5.6 630 -- -- -- 50.0 33.0

201 -- -- -- -- -- -- -- -- -- --

201 -- 8.00 -- -- 514 -- -- -- 91.4 34.4

202 1,740 7.29 13.9 6.7 480 -- -- -- 100 60.0
108 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

203 -- 8.30 -- -- 486 -- -- -- 40.1 2.90

203 -- -- -- -- -- -- -- -- -- --

204 3,840 7.34 13.1 0.5 -- -- -- -- 100 30.0

205 -- 8.20 -- -- 346 -- -- -- 35.9 1.50

205 -- -- -- -- -- -- -- -- -- --

206 1,390 8.00 9.8 -- 376 376 0 -- 15.8 <0.1

207 -- -- -- -- -- -- -- -- -- --

208 1.36 7.19 11.7 4.9 572 -- -- -- 70.0 64.0

209 -- 7.10 -- -- 620 620 0 -- 120 130

211 -- 7.30 -- -- 460 460 0 -- 98.0 53.0

213 804 7.68 -- -- -- -- -- -- -- 47.0

214 4,540 8.13 15.1 0.6 139 -- -- -- 63.3 3.26

214 -- -- -- -- -- -- -- -- -- --

215 5,063 7.40 4.3 7.8 226 -- -- -- 89.6 2.90

216 -- 7.90 -- -- 61.0 -- -- -- 235 2.90

216 -- -- -- -- -- -- -- -- -- --

217 1,249 7.10 3.3 0.8 372 -- -- -- 91.3 33.1

218 1,107 7.70 6.2 -- 301 -- -- -- 26.7 5.70

219 -- 8.10 -- -- 539 -- -- -- 120 73.5

220 -- 8.30 -- -- 442 -- -- -- 48.9 24.3

221 3,400 7.35 13.1 0.2 -- -- -- -- 110 48.0

222 -- 8.10 -- -- 233 -- -- -- 87.8 25.9

223 -- -- -- -- -- -- -- -- -- --

224 1,780 6.87 13.2 1.1 416 -- -- 1,570 168 79.8

225 1,660 7.16 13.0 2.8 431 -- -- 1,180 81.0 16.0

226 2,040 8.55 10.1 3.2 68.0 -- -- 1,000 25.0 1.20

227 4,900 7.63 13.5 5.0 480 480 -- -- 120 37.0

228 -- 8.60 -- -- 290 445 30 -- 7.0 1.30

228 -- -- -- -- -- -- -- -- -- --

229 2,270 8.28 15.8 7.1 590 -- -- 1,700 74.0 99.0

230 1,880 7.92 13.7 7.7 369 -- -- 1,410 91.7 57.7

231 1,300 7.34 4.6 -- 607 -- -- 833 68.0 49.0

232 1,700 7.79 10.2 8.0 811 -- -- 1,060 26.0 17.0

233 1,022 8.25 9.6 4.9 460 -- -- 630 89.0 54.0

234 2,930 7.33 21.9 -- 558 -- -- 2,730 280 160

235 -- -- -- -- -- -- -- -- -- --

236 -- 7.99 -- 8.6 475 779 0 -- 1.7 3.30

237 1,792 7.30 6.1 -- 564 -- -- 860 72.3 50.6

238 1,560 9.01 17.4 0.4 346 -- -- 1,010 0.4 <0.1

239 829 7.33 12.0 0.6 390 -- -- 570 58.0 49.0

240 1,558 8.00 1.8 5.9 467 -- -- 790 12.1 0.500

241 -- 7.50 -- -- 465 763 0 620 115 24.6

242 -- 7.60 -- -- 542 889 0 720 78.8 50.2

243 -- 7.60 -- -- 498 817 0 960 90.9 66.8

244 1,590 7.10 2.7 6.8 607 607 0 -- 106 47.4

245 -- 8.10 -- -- 478 784 0 600 89.1 49.1

246 2,350 7.73 12.1 1.4 447 -- -- 1,540 133 86.0

247 1,650 6.97 13.2 4.7 480 -- -- 1,200 53.0 32.0

248 -- 8.30 -- -- 476 -- -- -- 40.5 2.40

249 -- 8.40 -- -- 186 294 13 -- 43.7 2.80

250 2,950 7.25 14.5 4.3 -- -- -- -- 210 100

251 -- 8.30 -- -- 540 -- -- -- 58.6 19.7

252 -- 8.20 -- -- 555 -- -- -- 25.8 8.40

253 -- 8.40 -- -- 348 -- -- -- 18.6 4.70

254 -- 8.20 -- -- 93.0 -- -- -- 37.4 4.20

255 -- -- -- -- 209 209 0 -- 15.0 2.90

256 1,328 8.07 13.0 0.2 -- -- -- -- 9.6 1.40

256 -- -- -- -- -- -- -- -- -- --

257 2,750 7.47 8.6 4.4 -- -- -- -- 81.0 58.0

258 -- 8.30 -- -- 452 741 0 -- 22.7 11.4

259 3,300 8.10 -- -- -- -- -- -- 55.0 8.60

259 -- -- -- -- -- -- -- -- -- --

260 -- 8.20 -- -- 563 923 0 -- 62.8 49.5

261 -- 8.20 -- -- 463 759 0 -- 81.2 43.9
Appendix 109

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

262 1,792 7.30 6.1 -- 564 564 0 -- 72.3 50.6

263 2,180 7.40 2.6 4.5 426 426 0 -- 62.0 6.30

264 -- -- -- -- -- -- -- -- -- --

264 -- 8.00 -- -- 483 792 0 -- 69.6 37.2

265 1,387 7.50 7.6 1.1 478 478 0 -- 0.3 <0.1

266 1,404 8.70 7.6 2.0 65.0 65.0 0 -- 13.1 <0.1

267 2,170 6.87 11.8 3.7 395 -- -- 2,080 196 117

268 1,421 7.42 13.5 6.8 440 -- -- 960 98.0 65.0

269 -- 8.00 16.9 0.8 169 -- -- 3,030 100 3.40

270 4,040 8.48 17.5 1.5 190 -- -- 3,000 62.0 3.30

271 4,240 8.35 21.2 1.1 230 -- -- 3,300 68.0 3.60

272 2,300 8.21 12.0 1.5 -- -- -- 1,600 -- --

273 1,082 8.07 14.5 2.7 1,289 -- <5 2,400 14.0 6.10

274 1,139 8.51 12.3 3.9 1,055 -- <5 691 16.0 7.30

275 1,456 8.31 15.8 5.3 600 -- -- 1,000 79.0 43.0

276 2,400 7.22 13.4 0.4 1,058 -- <5 1,500 23.0 3.50

277 3,280 7.65 12.6 0.4 668 -- <5 1,960 36.6 1.77

278 1,680 7.26 12.1 3.9 1,544 -- <5 1,280 51.9 32.9

279 3,730 7.64 14.0 1.2 1,402 -- <5 3,040 92.9 33.4

280 1,960 8.18 14.2 0.5 1,121 -- <5 1,410 14.2 2.36

281 1,760 7.62 9.8 0.7 2,321 -- <5 1,130 11.0 2.10

282 2,470 9.58 13.6 0.2 625 -- <5 1,540 20.9 0.849

283 1,305 8.65 16.8 0.8 397 -- <5 790 11.0 0.380

284 826 7.83 16.4 7.1 1,488 -- <5 520 24.0 18.0

285 1,500 8.20 -- -- 800 -- 667 930 9.5 0.320

286 1,850 7.07 15.5 4.6 1,160 -- <5 1,050 12.4 0.347

287 2,590 7.90 20.5 4.4 160 -- -- 1,700 35.0 1.00

288 1,150 7.90 9.4 3.2 390 -- -- 530 10.1 1.50

289 1,211 8.37 8.9 4.1 510 -- -- 740 87.0 61.0

290 1,780 8.03 10.5 4.6 650 -- -- 1,200 61.0 120

291 960 7.45 12.1 6.5 294 -- -- 611 81.0 38.0

292 1,267 7.24 12.1 3.9 480 -- -- 830 110 66.0

293 1,620 7.46 12.7 7.4 383 -- -- 1,080 89.0 98.0

294 1,221 7.38 10.3 2.2 500 -- -- 740 80.0 50.0

295 2,150 7.70 12.4 8.6 379 -- -- 1,580 170 71.0

296 752.7 7.10 7.8 5.2 338 -- -- 400 62.3 32.7

297 1,283 8.10 1.5 4.1 401 -- -- 590 11.8 2.50

298 1,590 7.10 2.7 6.8 607 -- -- 770 106 47.4

299 2,290 7.25 9.6 4.0 440 -- -- 1,500 130 60.0

300 2,960 7.86 13.3 1.6 1,174 -- <5 1,790 43.0 4.00

301 2,940 7.86 16.4 1.8 1,154 -- <5 1,780 41.0 3.90

302 1,232 7.81 13.3 7.2 -- -- -- 780 -- --

303 1,830 8.21 14.8 0.9 140 -- -- 960 14.0 1.20

304 4,690 6.65 12.7 4.3 1,289 -- <5 4,300 170 59.0

305 2,480 7.85 13.2 0.6 1,223 -- <5 1,700 58.0 7.50

306 1,580 8.61 12.4 0.8 595 -- <5 980 10.0 0.550

307 2,060 9.17 22.3 0.9 363 -- -- 1,250 35.7 18.5

308 1,082 8.07 14.5 2.7 390 -- -- 2,400 14.0 6.10

309 1,780 8.12 12.7 1.7 460 -- -- 1,000 12.0 1.40

310 3,300 7.70 -- -- -- -- -- 1,700 45.0 0.980

311 1,146 8.15 10.1 1.3 360 -- -- 640 11.0 1.60

312 1,324 7.57 10.9 3.8 640 -- -- 840 64.0 55.0

313 4,580 8.11 14.0 2.0 470 -- -- 2,800 52.0 37.0

314 4,000 7.74 11.9 2.6 390 -- -- 2,800 220 130

315 1,314 8.01 14.0 8.8 1,944 -- <5 764 31.0 120

316 4,650 8.23 11.3 1.0 119 -- <5 2,650 120 1.70

317 2,390 8.28 10.2 2.9 690 -- -- 1,700 35.0 65.0

318 1,299 7.54 13.8 6.3 531 -- -- 785 110 41.0

319 1,690 7.11 16.4 1.3 470 -- -- 1,500 120 66.0

320 861 7.67 12.0 2.6 346 -- -- 492 45.0 30.9

321 2,200 7.83 16.8 6.0 441 -- -- 1,360 35.0 2.40

322 1,710 7.24 13.5 0.6 460 -- -- 1,200 10.0 1.40

323 2,117 7.50 5.0 2.8 366 -- -- 1,040 40.7 1.90

324 4,520 7.88 15.3 3.6 512 -- -- 2,830 67.9 22.5
110 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

325 1,990 7.85 6.3 2.7 160 -- -- 1,100 39.0 1.70

326 1,620 8.20 8.2 5.5 350 -- -- 960 31.0 0.730

327 2,780 8.18 13.5 6.0 -- -- -- 1,500 27.0 0.680

328 2,850 7.90 14.6 3.2 1,785 -- <5 1,900 66.0 62.0

329 2,080 8.33 6.5 3.8 420 -- -- 1,100 59.0 5.60

330 1,313 7.30 6.7 4.9 480 -- -- 670 66.6 13.3

331 2,180 7.40 2.6 4.5 426 -- -- 1,210 62.0 6.30

332 5,010 7.89 12.0 2.1 936 -- <5 4,420 108 6.26

333 1,180 8.56 13.4 3.7 1,719 -- <5 740 8.2 0.430

334 3,280 7.41 11.6 4.3 477 -- -- 2,730 103 42.6

335 1,068 7.56 7.2 0.6 560 -- -- 620 72.0 45.0

336 1,193 7.63 43.1 1.3 500 -- -- 630 68.0 44.0

337 1,730 8.00 7.6 3.1 223 -- -- 900 14.1 0.300

338 5,063 7.40 4.3 7.8 226 -- -- 2,280 89.6 2.90

339 2,860 7.16 13.4 4.1 437 -- -- 2,910 299 170

340 3,237 7.30 1.9 3.6 444 -- -- 1,750 80.8 14.8

341 8,040 7.72 19.2 3.0 270 -- -- 4,100 43.0 12.0

342 1,420 7.24 18.2 1.2 730 -- -- 920 62.0 54.0

343 1,500 7.43 15.3 1.7 660 -- -- 960 35.0 23.0

344 1,490 9.97 13.0 1.1 292 -- -- 1,200 12.9 1.79

345 -- -- -- -- -- -- -- -- -- --

346 6,010 9.05 7.8 0.3 439 -- -- 4,930 119 38.1

347 1,463 7.70 7.9 6.9 645 -- -- 800 41.6 24.0

348 1,950 6.94 12.3 2.5 440 -- -- 1,400 170 79.0

349 1,220 7.20 7.2 5.2 541 -- -- 640 43.8 15.6

350 1,153 7.30 8.3 3.2 531 -- -- 640 61.8 25.4

351 5,480 7.53 14.9 5.0 490 -- -- 4,300 120 23.0

352 1,610 7.90 12.0 2.3 340 -- -- 940 42.0 8.80

353 2,800 7.68 12.0 -- 343 -- -- 1,820 78.0 11.0

354 1,740 6.91 12.6 0.4 450 -- -- 740 170 81.0

355 2,870 6.86 12.2 3.2 550 -- -- 1,500 250 140

356 2,070 7.60 19.4 9.0 626 -- -- 1,260 1.0 0.220

357 3,040 7.61 14.4 7.8 553 -- -- 2,130 150 100

358 2,780 7.50 17.7 5.8 640 -- -- 2,100 160 120

359 2,360 7.00 13.3 0.3 280 -- -- 1,700 25.0 1.50

360 -- -- -- -- -- -- -- -- -- --

361 892 8.38 13.0 0.5 257 -- -- 596 4.4 <0.1

362 1,860 7.84 11.4 7.3 440 -- -- 1,050 28.0 6.60

363 3,500 7.44 12.1 0.5 194 -- -- 2,000 48.0 5.80

364 4,540 8.13 15.1 0.6 139 -- -- 1,990 63.3 3.26

365 2,630 7.63 14.8 1.2 420 -- -- 2,050 29.7 2.35

366 1,283 7.46 12.5 3.3 550 -- -- 748 72.0 38.0

367 2,760 7.80 4.5 1.0 135 -- -- 1,210 29.8 5.60

368 1,387 7.50 7.6 1.1 478 -- -- 790 0.3 <0.1

369 1,900 7.60 -- -- 1,680 -- -- 1,200 78.0 140

370 1,098 7.27 9.8 4.2 467 -- -- 669 80.0 45.0

371 1,153 7.20 7.4 4.3 490 -- -- 660 85.7 45.5

372 1,780 8.31 12.4 3.7 431 -- -- 1,560 33.0 10.0

373 1,630 7.56 11.2 8.2 841 -- -- 1,060 74.0 42.0

374 713 8.43 10.2 5.1 310 -- -- 400 55.0 25.0

375 1,404 8.70 7.6 2.0 65.0 -- -- 610 13.1 <0.1

376 -- -- -- -- -- -- -- -- -- --

377 2,670 7.47 13.9 0.6 522 -- -- 2,080 52.5 18.3

378 3,010 7.12 21.1 -- 143 -- -- 1,630 15.0 1.10

379 9,900 7.80 -- -- 250 -- -- 5,200 78.0 24.0

380 1,610 8.23 20.1 2.6 400 -- -- 1,100 13.0 0.490

381 3,640 7.74 12.4 10.3 357 -- -- 2,320 75.0 20.0

382 2,400 8.00 15.0 3.5 890 -- -- 1,500 33.0 62.0

383 2,930 8.82 16.2 0.3 448 -- -- 2,100 71.1 26.5

384 1,700 7.30 13.9 5.0 484 -- -- 1,030 82.0 16.0

385 1,225 8.34 8.8 2.7 530 -- -- 760 86.0 62.0

386 4,220 8.18 21.1 2.7 510 -- -- 3,000 37.0 8.90

387 2,850 8.60 11.1 5.4 120 -- -- 1,500 43.0 2.10

388 1,107 7.70 6.2 -- 301 -- -- 520 26.7 5.70
Appendix 111

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

389 621 7.93 7.2 3.6 270 -- -- 400 38.0 10.0

390 692 7.12 15.4 3.5 300 -- -- 340 37.0 10.0

391 906 8.76 14.6 -- 411 -- -- 704 37.6 43.1

392 1,830 8.08 13.2 0.6 439 -- -- 4,930 119 38.1

393 3,250 7.10 10.7 0.8 160 -- -- 2,700 310 170

394 2,170 8.18 14.7 1.2 608 -- -- 1,460 17.3 2.12

395 4,320 8.34 15.9 0.7 130 -- -- 2,710 57.3 4.49

396 3,310 8.20 9.1 3.5 193 -- -- 2,500 49.1 3.00

397 1,054 7.50 10.8 2.0 510 -- -- 700 80.0 55.0

398 1,350 7.53 15.0 5.1 514 -- -- 844 69.0 96.0

399 1,296 7.37 15.5 14.0 660 -- -- 770 75.0 48.0

400 1,276 7.42 14.6 3.9 590 -- -- 750 69.0 44.0

401 1,142 8.40 15.6 0.4 340 -- -- 743 6.2 0.491

402 1,830 8.24 11.7 0.1 232 -- -- 1,410 12.6 2.79

403 1,390 8.00 9.8 -- 376 -- -- 790 15.8 <0.1

404 1,587 7.60 7.3 2.6 478 -- -- 810 44.6 5.00

405 960 7.20 2.3 0.2 384 -- -- 460 74.8 22.6

406 1,319 8.24 18.3 0.7 451 -- -- 976 6.8 0.402

407 1,510 7.90 7.2 6.2 577 -- -- 880 18.5 7.70

408 3,000 7.10 17.0 -- -- -- -- -- -- --

409 1,200 7.20 18.0 -- 967 590 0 -- 82.0 88.0

410 1,550 7.40 15.0 -- -- -- -- -- -- --

414 1,250 7.50 12.5 -- 951 580 0 -- 83.0 66.0

415 975 7.20 20.0 -- 836 510 0 -- 76.0 55.0

416 1,225 7.10 12.0 -- 787 480 0 -- 78.0 60.0

417 1,820 7.00 9.5 -- -- -- -- -- -- --

418 -- 7.80 18.0 -- -- -- -- -- -- --

419 1,550 8.40 17.0 -- 1879 1,130 16 -- 9.0 7.60

420 220 7.70 14.8 -- 197 120 0 -- 25.0 8.00

428 12,310 7.15 10.9 2.3 -- -- -- -- 110 43.0

429 -- 7.60 -- -- 198 -- -- 1,870 487 49.0

430 690 7.20 19.4 5.8 -- -- -- -- 90.0 30.0

432 -- 7.50 -- -- 261 -- -- 710 62.9 6.00

433 -- 7.60 -- -- 371 -- -- 460 117 28.1

434 890 7.39 10.1 4.8 -- -- -- -- 79.0 40.0

435 10,760 7.42 12.1 6.9 -- -- -- -- 70.0 47.0

436 3,130 7.44 13.4 2.2 -- -- -- -- 98.0 18.0

437 -- 7.30 -- -- 250 250 0 -- 74.0 19.0

438 -- 7.90 -- -- 248 407 0 390 94.6 24.4

439 -- -- -- -- -- -- -- -- 110 57.0

440 -- -- -- -- -- -- -- -- -- --

441 900 7.90 13.7 -- -- 591 0 -- 19.0 1.30

442 -- 8.00 -- -- 275 -- -- -- 256 153

443 -- 7.70 -- -- 350 574 -- -- 70.0 <0.1

444 1,430 7.08 7.6 0.8 -- -- -- -- 27.0 5.80

445 -- 7.79 -- -- -- -- -- -- 44.0 18.0

446 510 7.20 13.3 1.7 -- -- -- -- 79.0 38.0

447 570 7.40 19.3 6.4 -- -- -- -- 85.0 29.0

447 -- -- -- -- -- -- -- -- -- --

448 410 7.40 15.0 8.1 -- -- -- -- 87.0 13.0

448 -- -- -- -- -- -- -- -- -- --

449 1,810 8.00 12.1 0.6 -- 771 0 -- 38.0 16.0

450 530 7.30 14.1 4.0 -- 476 0 -- 77.0 17.0

451 630 7.30 19.9 8.9 -- 558 0 -- 100 21.0

452 800 7.60 13.6 -- -- 738 0 -- 43.0 15.0

453 780 7.30 13.0 -- -- 689 0 -- 80.0 32.0

453 -- -- -- -- -- -- -- -- -- --

454 890 7.10 13.7 0.2 -- 689 0 -- 50.0 16.0

454 -- -- -- -- -- -- -- -- -- --

455 812 8.10 14.0 -- -- -- -- 733 6.0 3.10

456 541 7.50 14.6 -- -- -- -- 444 32.8 44.1

457 -- 7.60 -- -- -- -- -- -- -- --

458 -- 7.60 -- -- -- -- -- -- -- --

459 -- 7.60 -- -- -- -- -- -- -- --
112 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

460 -- -- -- -- -- -- -- -- 42.0 35.0

461 -- -- -- -- -- -- -- -- -- --

462 -- 8.40 -- -- 282 -- -- -- 62.2 40.2

463 -- 7.76 -- -- 382 -- -- -- 43.0 49.0

464 -- 7.66 -- -- 292 -- -- -- 55.0 32.0

465 15,400 6.90 -- -- -- -- -- 11,600 20.0 10.0

466 -- 7.80 -- -- 274 -- -- 280 60.8 20.4

468 -- 7.80 -- -- -- -- -- -- -- --

469 649 7.34 12.1 7.3 263 -- -- -- 42.0 43.0

470 575 7.59 16.4 2.7 370 -- -- -- 44.0 43.0

471 851 7.61 12.6 5.0 369 -- -- -- 39.0 53.0

472 555 7.58 14.8 5.9 280 -- -- -- 57.0 31.0

473 -- 8.48 -- -- 300 -- -- -- 43.0 --

474 -- 8.44 -- -- 342 -- -- -- 40.0 --

475 -- 8.83 -- -- 228 -- -- -- 14.0 --

476 -- 8.20 -- -- 524 -- -- -- 53.9 75.2

477 557 9.00 18.0 5.5 270 -- -- -- 1.1 0.160

478 694 7.49 19.6 2.6 312 -- -- -- 39.0 19.0

479 815 7.55 -- 7.5 -- -- -- -- -- --

480 756 7.75 -- 5.1 -- -- -- -- -- --

481 645 6.73 12.0 8.2 257 -- -- -- 44.0 36.0

482 410 7.17 12.0 5.7 254 -- -- -- 43.0 41.0

483 559 7.77 11.9 8.6 292 -- -- -- 45.0 37.0

484 -- -- -- -- -- -- -- -- -- --

485 555 7.15 11.1 3.3 300 -- -- -- 55.0 33.0

486 706 7.96 8.3 12.0 301 -- -- 411 35.0 34.0

487 527 7.36 9.8 8.2 300 -- -- 350 74.0 28.0

488 -- 7.30 -- -- 489 802 0 890 141 66.7

489 -- 8.00 -- -- -- -- -- -- -- --

490 -- 7.70 -- -- -- -- -- -- -- --

491 -- 8.10 -- -- 312 312 -- -- 24.0 38.0

492 862 7.60 20.5 5.1 370 -- -- -- 55.0 40.0

493 -- 8.30 -- -- 492 781 27 -- 56.8 70.9

494 591 8.56 -- -- 308 -- -- -- 10.0 12.0

495 -- 8.00 -- -- 229 -- -- -- 49.0 0.014

496 699 7.87 12.2 5.1 357 -- -- -- 24.0 43.0

497 601 7.50 12.3 5.8 252 -- -- -- 54.0 35.0

498 528 7.84 12.1 6.7 271 -- -- -- 28.0 34.0

499 608 8.01 12.1 6.8 309 -- -- -- 24.0 30.0

500 716 7.44 19.2 5.8 311 -- -- -- 56.0 27.0

501 1,400 7.40 -- -- -- -- -- -- 120 67.0

502 374 8.10 -- -- 225 220 0 -- 13.9 29.6

503 -- 7.90 -- -- -- -- -- -- 73.0 --

504 1,200 7.70 -- -- 960 -- 801 710 51.0 68.0

505 640 7.40 -- -- 260 -- 217 360 47.0 42.0

506 645 6.73 12.0 8.2 257 -- -- 342 44.0 36.0

507 547 7.40 14.3 6.7 270 -- -- 340 68.0 26.0

508 625 7.53 15.2 5.0 310 -- -- 380 48.0 45.0

509 7,890 7.77 19.0 2.5 250 -- -- 4,600 56.0 13.0

510 7,560 9.14 15.3 5.2 260 -- -- 4,300 53.0 13.0

511 410 7.17 12.0 5.7 254 -- -- 328 43.0 41.0

512 895 7.46 15.2 6.8 500 -- -- 560 48.0 71.0

513 530 9.05 9.3 5.1 270 -- -- 300 42.0 37.0

514 784 7.58 12.9 3.3 1,127 -- <5 450 52.0 47.0

515 590 8.90 -- -- 520 -- -- 350 0.8 <0.1

516 694 7.49 19.6 2.6 312 -- -- 427 39.0 19.0

517 671 7.98 16.1 7.3 320 -- -- 420 43.0 39.0

518 610 7.40 -- -- 560 -- -- 360 67.0 30.0

519 590 7.60 -- -- 560 -- -- 350 53.0 32.0

520 1,100 7.70 -- -- 700 -- -- 590 65.0 60.0

521 1,041 7.21 10.8 0.5 480 -- -- 570 52.0 67.0

522 721 7.39 8.5 3.4 330 -- -- 420 42.0 47.0

523 977 7.55 13.4 8.4 420 -- -- 590 80.0 40.0

524 522 7.35 12.0 8.6 260 -- -- 330 59.0 29.0
Appendix 113

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

525 851 7.61 12.6 5.0 369 -- -- 493 39.0 53.0

526 -- -- -- -- -- -- -- -- -- --

527 580 7.40 -- -- 620 -- -- 200 55.0 32.0

528 699 7.87 12.2 5.1 357 -- -- 405 24.0 43.0

529 590 7.90 -- -- 440 -- -- 320 27.0 18.0

530 594 7.32 10.1 1.7 418 -- -- 4,220 423 240

531 591 8.48 19.1 -- 300 -- -- 367 43.0 37.0

532 842 7.49 11.5 8.4 392 -- -- 466 47.0 56.0

533 562 7.39 14.5 2.5 290 -- -- 350 65.0 30.0

534 954 7.93 8.2 8.2 420 -- -- 690 110 59.0

535 1,107 7.58 12.5 1.8 440 -- -- 750 110 65.0

536 610 8.30 -- -- 700 -- -- 330 62.0 33.0

537 499 7.89 12.1 0.8 280 -- -- 320 35.0 34.0

538 680 8.44 19.0 -- 342 -- -- 429 40.0 45.0

539 610 8.00 -- -- 680 -- -- 310 26.0 32.0

540 635 7.38 12.4 4.3 290 -- -- 380 51.0 40.0

541 677 8.01 13.2 5.5 300 -- -- 450 28.0 40.0

542 716 7.44 19.2 5.8 311 -- -- 436 56.0 27.0

543 740 7.30 -- -- 700 -- -- 440 74.0 36.0

544 440 7.80 -- -- -- -- -- -- -- --

558 1,800 7.40 18.0 -- -- -- -- -- -- --

559 1,700 7.50 15.5 -- 1,098 670 0 -- 150 120

560 1,800 7.40 -- -- -- -- -- -- -- --

561 1,640 7.40 -- -- -- -- -- -- -- --

562 -- 7.35 -- -- 323 -- -- -- 97.0 16.0

563 -- 8.10 -- -- 310 -- -- 540 61.6 43.8

564 1,340 7.40 -- -- -- -- -- -- -- --

565 1,360 7.40 -- -- -- -- -- -- -- --

566 686 7.60 -- -- -- -- -- -- -- --

569 1,260 7.40 14.0 -- -- -- -- -- -- --

570 -- 7.50 -- -- 455 -- -- 1,170 125 85.6

571 -- 7.40 -- -- 410 -- -- 1,270 134 91.8

572 -- 7.80 -- -- 402 659 0 580 72.9 50.9

573 -- 7.70 -- -- 376 617 0 370 46.4 45.6

574 -- -- -- -- -- -- -- -- -- --

575 1,620 8.50 13.1 1.8 220 -- -- 1,000 120 38.0

576 -- 7.60 -- -- 296 486 0 1,360 109 88.2

577 -- 7.60 -- -- 334 548 0 470 57.4 41.7

578 -- 7.90 -- -- 304 499 0 340 25.1 22.9

579 619 8.04 16.9 6.7 280 -- -- 320 30.0 40.0

580 -- 7.30 -- -- 422 692 0 2,670 159 142

581 1,130 7.37 17.1 7.0 430 -- -- 720 64.0 54.0

582 1,540 7.68 18.5 6.4 390 -- -- 1,100 77.0 66.0

583 2,350 7.20 15.7 4.6 350 -- -- 2,000 160 140

584 1,660 7.42 13.9 6.9 350 -- -- 1,200 110 100

585 1,630 7.46 15.2 4.9 430 -- -- 1,100 66.0 92.0

586 837 7.56 13.2 6.6 340 -- -- 520 53.0 44.0

587 1,830 7.48 14.4 7.3 340 -- -- 1,400 120 110

588 1,040 7.67 12.2 8.4 350 -- -- 680 56.0 57.0

589 808 7.68 13.6 6.7 320 -- -- 500 58.0 46.0

590 733 7.50 16.2 5.7 340 -- -- 450 41.0 40.0

591 645 7.62 14.1 7.5 310 -- -- 400 31.0 20.0

592 723 7.91 15.2 7.7 340 -- -- 430 26.0 30.0

593 696 7.80 14.0 7.3 300 -- -- 440 34.0 31.0

594 880 7.64 14.6 5.3 310 -- -- 570 42.0 38.0

595 936 7.40 14.3 7.0 320 -- -- 600 39.0 38.0

596 630 7.96 16.0 6.9 280 -- -- 380 26.0 22.0

597 547 7.84 15.7 5.2 260 -- -- 340 35.0 28.0

598 625 8.01 15.0 7.2 280 -- -- 400 20.0 20.0

599 900 8.10 -- -- 250 410 0 -- 15.0 <0.1

600 860 7.70 -- -- -- -- -- -- 43.0 --

601 1,300 7.07 -- 7.6 597 -- <5 252 39.6 21.0

602 1,410 8.90 19.9 5.5 240 -- -- 920 1.7 0.940

603 630 7.70 -- -- 560 -- -- 360 36.0 40.0
114 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

604 2,990 8.74 15.3 3.1 520 -- -- 2,200 94.0 97.0

605 3,930 7.15 15.3 0.6 430 -- -- 3,600 310 180

606 3,750 7.35 14.8 3.2 450 -- -- 3,400 310 180

607 872 8.71 15.8 3.5 260 -- -- 530 34.0 44.0

608 4,690 6.65 12.7 4.3 390 -- -- 4,300 170 59.0

609 154 7.52 13.3 4.8 450 -- -- 960 63.0 84.0

610 595 8.14 14.9 6.8 230 -- -- 320 36.0 29.0

611 608 8.01 13.8 5.2 280 -- -- 320 37.0 31.0

612 782 8.19 14.3 7.6 330 -- -- 460 22.0 21.0

613 620 7.80 -- -- 310 -- -- 360 28.0 39.0

614 694 8.17 13.7 7.1 300 -- -- 390 23.0 24.0

615 1,470 7.50 14.0 -- -- -- -- 1,168 49.6 80.1

616 -- 8.11 -- -- 292 -- -- -- 21.0 35.0

617 -- 7.85 -- -- 326 -- -- -- 19.0 32.0

623 1,983 7.10 11.5 2.4 481 587 -- 1,614 157 111

624 2,866 6.85 12.4 0.7 352 429 -- 2,756 384 159

625 1,360 7.10 14.0 6.4 -- -- -- -- 150 99.0

626 -- 7.50 -- -- 373 -- -- 1,110 159 103

627 2,765 7.75 10.6 0.7 475 579 -- 1,954 53.2 19.7

628 789 8.01 13.8 12.0 372 -- -- -- 23.1 24.7

629 -- 8.85 -- -- 300 -- -- -- 16.0 --

630 807 7.61 16.2 6.8 420 -- -- -- 52.0 53.0

631 801 7.63 -- -- 497 -- -- -- -- 62.0

632 591 8.40 8.3 6.5 340 -- -- -- 17.0 16.0

633 612 8.68 9.1 2.3 350 -- -- -- 27.0 34.0

634 -- 8.20 -- -- 156 241 15 300 23.2 8.30

635 1,100 6.84 16.0 12.0 388 635 0 -- 47.7 60.0

636 780 7.62 13.9 12.4 330 541 0 -- 23.7 30.1

637 486 7.82 11.6 7.9 220 361 0 -- 34.2 25.7

638 627 7.73 12.4 7.3 330 540 0 -- 44.3 36.9

639 -- 8.10 -- -- 316 518 0 560 18.9 36.0

640 597 8.06 12.4 4.7 291 -- -- -- 19.0 23.0

641 549 7.70 12.3 6.1 243 243 0 -- 33.0 39.0

642 519 8.44 -- -- 302 -- -- -- 15.0 16.0

643 1,183 7.35 12.8 6.9 394 -- -- -- 67.0 41.0

644 536 7.40 10.5 4.8 230 -- -- -- 61.8 14.3

645 695 7.70 12.4 5.6 311 -- -- -- 27.0 12.0

646 1,150 8.00 12.0 3.5 -- -- -- -- 150 74.0

647 2,620 7.80 14.7 4.4 -- -- -- -- 27.0 33.0

649 2,050 6.10 11.6 10.7 -- -- -- -- 47.0 16.0

650 788 8.10 -- -- 324 -- -- -- 39.7 44.5

651 789 8.30 -- -- 325 -- -- -- 40.0 44.9

652 351 8.00 -- -- 79.5 -- -- -- 19.8 10.6

653 -- 8.20 -- -- -- -- -- -- 33.0 --

654 1,780 7.26 12.4 3.8 480 -- -- 1,100 120 69.0

655 2,020 7.23 11.6 3.1 530 -- -- 1,300 130 73.0

656 1 7.19 19.9 1.0 290 -- -- 730 97.0 31.0

657 1,800 8.60 20.4 1.8 280 -- -- 1,100 27.0 30.0

658 2,170 7.83 19.7 3.1 270 -- -- 1,700 44.0 15.0

660 980 7.50 13.2 2.6 -- 640 0 -- 150 67.0

660 -- -- -- -- -- -- -- -- -- --

661 5,690 7.44 12.9 8.1 370 -- -- 5,100 320 290

662 910 8.00 13.0 10.2 -- 492 0 -- 130 75.0

663 1,680 7.60 15.3 4.4 -- 673 0 -- 150 100

663 -- -- -- -- -- -- -- -- -- --

664 3,120 7.55 14.5 2.0 300 -- -- 2,100 98.0 34.0

665 608 8.12 8.2 8.9 340 556 0 -- 39.3 40.9

666 739 7.69 14.4 11.1 368 602 0 -- 25.1 26.6

667 963 7.43 12.7 11.4 348 569 0 -- 30.7 58.9

668 770 7.26 12.7 13.6 370 607 0 -- 21.2 42.5

669 1,169 7.29 11.1 7.4 310 -- -- 870 120 73.0

670 732 7.52 12.5 11.9 349 571 0 -- 16.7 25.8

671 553 8.14 12.1 8.4 320 523 0 -- 18.5 30.7

672 628 7.65 11.5 8.2 376 615 0 -- 34.6 34.8
Appendix 115

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

673 715 8.02 12.1 7.9 328 538 0 -- 32.8 34.5

674 608 7.30 -- -- 268 440 0 -- 60.1 38.1

675 1,155 7.20 17.0 5.6 310 -- -- 860 120 72.0

676 1,870 7.08 14.6 4.3 410 -- -- 1,400 160 100

677 771 7.58 13.3 1.4 1,355 -- 0 530 52.0 39.0

678 600 7.90 -- -- 720 -- -- 350 26.0 34.0

679 563 7.53 14.2 5.1 272 -- -- 338 28.0 26.0

680 1,400 8.00 19.5 10.9 291 -- -- 846 55.0 20.0

681 560 7.80 -- -- 660 -- -- 320 37.0 36.0

682 801 7.63 15.5 -- 497 -- -- 565 58.0 62.0

683 906 8.09 16.1 7.3 450 -- -- 570 62.0 28.0

684 597 8.06 12.4 4.7 291 -- -- 360 19.0 23.0

685 1,151 8.06 13.5 7.3 387 -- -- 700 14.0 5.40

686 1,280 8.55 20.1 10.1 431 -- -- 761 5.1 1.30

687 600 8.30 -- -- 680 -- -- 350 17.0 18.0

688 695 7.70 12.4 5.6 311 -- -- 426 27.0 12.0

689 10,860 7.53 13.5 5.8 810 -- -- 8,800 160 300

690 1,183 7.35 12.8 6.9 394 -- -- 768 67.0 41.0

691 670 -- 16.5 -- -- 520 -- -- 13.0 7.40

692 4,080 12.00 91.0 -- -- -- -- 1,340 316 <0.1

693 -- 8.00 -- -- -- -- -- -- -- --

694 -- 8.31 -- -- 245 -- -- -- 11.0 14.0

695 590 7.90 -- -- 260 -- -- -- 37.0 23.0

696 -- 7.88 -- -- 411 -- -- -- -- --

699 -- -- -- -- 330 -- -- -- 71.0 41.0

704 740 7.60 12.0 -- -- -- -- -- -- --

706 -- 8.20 -- -- 309 -- -- 340 57.9 32.5

707 -- 8.30 -- -- 356 -- -- 440 59.8 41.1

708 -- 8.10 -- -- 324 -- -- 330 82.6 23.7

709 -- 7.70 -- -- 337 -- -- 380 29.7 38.8

710 -- -- -- -- -- -- -- -- -- --

711 -- 7.80 -- -- 308 -- -- 350 29.5 35.2

712 -- 7.65 -- -- 285 -- -- 532 50.0 31.0

714 -- 8.05 -- -- 286 -- -- 548 63.0 38.0

715 -- 7.40 -- -- 309 -- -- 430 72.9 27.2

716 -- 8.00 -- -- -- -- -- -- -- --

717 -- 8.00 -- -- -- -- -- -- -- --

718 -- 8.00 -- -- -- -- -- -- -- --

719 -- 8.10 -- -- 343 563 0 390 14.8 29.9

720 -- 8.10 -- -- 353 579 0 390 20.5 32.0

721 -- -- -- 0.1 -- -- -- -- -- --

722 864 7.60 -- 4.3 -- -- -- -- -- --

723 780 6.78 -- -- -- -- -- -- -- --

724 820 7.53 -- -- -- -- -- -- -- --

725 835 7.46 -- 5.6 -- -- -- -- -- --

726 125 8.01 -- -- 62.6 -- -- -- 16.0 4.50

727 -- 7.90 -- -- 425 697 0 450 80.8 38.5

728 -- 7.90 -- -- 394 646 0 440 75.9 34.7

729 -- 8.00 -- -- 383 628 0 440 73.2 34.8

730 -- 7.90 -- -- 381 625 0 440 73.8 35.0

731 -- 8.00 -- -- 291 477 0 320 63.6 20.2

732 -- 7.90 -- -- 320 525 0 310 56.2 31.7

733 -- 7.90 -- -- 199 326 0 230 53.3 13.9

734 -- 7.70 -- -- 319 523 0 380 37.3 41.3

735 -- 7.60 -- -- 292 479 0 400 64.8 36.2

736 -- 7.70 -- -- 214 351 0 240 44.0 24.0

737 -- 7.80 -- -- 310 508 0 340 34.8 42.1

738 -- 7.80 -- -- 230 377 0 340 44.0 37.3

739 -- -- -- -- -- -- -- -- -- --

740 -- 7.90 -- -- 331 543 0 340 47.4 37.2

741 -- -- -- -- -- -- -- -- -- --

742 -- 7.60 -- -- 333 546 0 380 49.0 33.0

743 -- 7.80 -- -- 356 584 0 380 39.0 40.5

744 -- 7.80 -- -- 308 505 0 510 35.3 28.2
116 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

745 -- 8.20 -- -- 371 609 0 440 12.5 22.3

746 -- 7.70 -- -- 297 487 0 320 59.8 22.6

747 -- 7.70 -- -- 337 553 0 410 81.0 24.8

748 -- 7.70 -- -- 335 550 0 400 82.3 23.2

749 -- 7.50 -- -- 367 602 0 480 71.0 37.2

750 -- 7.60 -- -- 399 654 0 540 79.5 40.2

751 -- 7.70 -- -- 365 599 0 500 81.5 39.4

752 -- 7.40 -- -- 583 956 0 1,090 105 116

753 -- 7.60 -- -- 370 607 0 490 70.6 39.6

754 -- 7.60 -- -- 288 472 0 400 63.7 28.5

755 -- 8.00 -- -- 347 569 0 420 31.4 40.3

756 -- 8.00 -- -- -- -- -- -- -- --

757 -- 7.50 -- -- -- -- -- -- -- --

758 -- 8.00 -- -- -- -- -- -- -- --

759 -- 7.70 -- -- -- -- -- -- -- --

760 -- 7.80 -- -- 288 472 0 370 28.2 39.9

761 -- 7.80 -- -- 244 400 0 310 26.4 33.8

762 -- 7.30 -- -- 422 692 0 530 87.8 45.2

763 -- 7.60 -- -- 366 600 0 440 82.2 32.4

764 -- 7.70 -- -- 378 620 0 440 62.5 43.7

765 -- 7.40 -- -- -- -- -- -- -- --

766 590 7.50 -- -- 290 -- -- -- 64.0 27.0

767 570 7.70 -- -- 290 -- -- -- 40.0 28.0

768 540 8.10 -- -- 260 -- -- -- 17.0 29.0

769 560 7.80 -- -- 280 -- -- -- 44.0 31.0

770 790 7.80 -- -- 460 -- -- -- 67.0 69.0

771 590 8.00 -- -- 310 -- -- -- 18.0 27.0

772 500 8.00 -- -- 260 -- -- -- 27.0 34.0

773 440 8.40 -- -- 240 -- -- -- 18.0 23.0

774 640 8.30 -- -- 320 320 6 -- 9.1 17.0

775 554 7.57 12.9 5.3 320 -- -- 350 45.0 30.0

776 563 7.23 11.3 8.1 300 -- -- 340 63.0 27.0

777 655 7.71 12.1 5.7 280 -- -- 400 48.0 35.0

778 644 7.14 13.2 3.7 310 -- -- 410 70.0 33.0

779 762 6.98 14.8 9.6 -- 420 <1 570 60.0 42.0

780 240 6.53 13.5 -- -- 116 <1 139 26.0 6.00

781 600 7.37 14.0 12.3 -- 449 <1 443 81.0 30.0

782 940 7.70 -- -- 760 -- -- 540 20.0 38.0

783 450 7.53 17.4 10.0 -- 261 <1 287 67.0 16.0

784 600 7.30 14.8 -- -- 305 <1 272 54.0 28.0

785 5,520 6.81 18.1 7.4 -- 559 <1 4,620 351 191

786 700 7.70 19.4 12.0 -- 335 <1 330 58.0 30.0

787 550 7.90 -- -- 483 443 <33.358 340 73.0 14.0

788 720 7.23 11.4 10.3 -- 559 <1 478 75.0 44.0

789 340 7.11 9.7 10.6 -- 234 <1 234 50.0 16.0

790 743 7.73 -- -- 666 623 <33.358 460 73.0 35.0

791 494 7.47 10.8 6.3 240 -- -- 310 41.0 28.0

792 637 7.37 11.3 7.0 360 -- -- 380 28.0 32.0

793 735 6.98 20.7 6.2 334 -- -- 408 66.3 29.1

794 558 7.48 11.4 5.8 310 -- -- 380 41.0 28.0

795 1,320 7.20 11.3 3.5 300 -- -- 910 86.0 48.0

796 733 7.67 14.6 6.9 290 -- -- 450 40.0 33.0

797 424 8.41 9.9 8.2 220 -- -- 240 22.0 30.0

798 412 7.55 9.5 6.2 220 -- -- 280 32.0 23.0

799 550 7.60 -- -- 520 -- -- 310 35.0 39.0

800 656 7.70 12.7 -- -- -- -- 619 24.2 35.1

801 1,700 8.90 -- -- -- -- -- -- -- --

802 2,750 8.26 10.8 1.0 -- -- -- -- 140 100

803 2,950 7.20 16.6 0.4 -- -- -- -- 94.0 39.0

804 2,130 7.10 12.0 0.2 551 672 -- 1,491 87.4 41.3

805 6,622 7.55 10.1 0.2 249 303 -- 5,281 258 62.1

806 -- 8.40 -- -- 394 -- -- -- 42.9 3.10

807 3,530 8.36 15.3 0.2 113 138 -- 1,962 29.4 1.29

811 1,672 7.20 10.4 5.5 456 556 -- 1,102 87.0 83.4
Appendix 117

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

812 1,415 7.33 10.6 5.5 394 481 -- 1,003 95.5 62.2

813 1,895 7.02 10.8 0.5 604 736 -- 1,518 151 153

814 1,580 7.24 12.7 4.2 460 561 -- 1,086 114 67.9

815 1,740 8.10 14.5 0.8 -- -- -- -- 90.0 49.0

816 1,150 7.30 11.8 8.6 364 444 -- 773 94.5 73.3

817 1,510 8.20 10.5 3.7 374 456 -- 1,001 11.4 3.56

818 2,430 8.20 12.9 0.4 -- -- -- -- 170 100

819 4,020 7.95 12.8 0.1 350 -- -- 2,819 48.3 10.0

820 813 7.55 13.3 7.7 257 313 -- 558 51.3 53.0

821 -- 7.40 -- -- 496 -- -- 970 87.0 55.7

822 2,200 7.02 13.7 1.8 -- -- -- -- 180 96.0

823 1,840 7.11 12.3 0.8 -- -- -- -- 120 71.0

824 3,180 6.86 12.5 0.8 -- -- -- -- 330 150

825 3,380 6.14 13.0 2.7 -- -- -- -- 420 210

826 -- 8.50 -- -- 196 -- -- -- 23.8 5.90

827 2,430 8.47 5.9 2.8 -- -- -- -- 21.0 3.90

828 1,070 7.30 14.5 6.6 -- 558 0 -- 38.0 17.0

829 -- 7.70 -- -- 358 587 0 730 79.5 59.5

830 4,650 8.20 13.9 0.3 -- 1,033 0 -- 130 65.0

831 -- -- -- -- -- -- -- -- -- --

832 1,700 7.58 15.9 0.6 -- -- -- -- 9.6 1.30

833 2,260 7.40 16.7 0.8 -- -- -- -- 39.0 9.60

834 -- 7.20 -- -- 630 1,033 0 2,160 166 89.7

835 1,490 7.00 19.9 4.1 -- 574 0 -- 140 84.0

836 2,130 8.10 12.1 0.8 -- 394 0 -- 58.0 10.0

837 2,760 7.30 15.5 8.0 -- 738 0 -- 42.0 33.0

838 1,500 7.80 15.5 6.9 -- 656 0 -- 90.0 59.0

838 -- -- -- -- -- -- -- -- -- --

839 -- 7.80 -- -- 499 819 0 2,240 61.8 5.80

840 5,750 7.30 12.3 1.7 -- 607 0 -- 280 180

840 -- -- -- -- -- -- -- -- -- --

841 1,880 7.30 14.3 0.5 -- 837 0 -- 100 69.0

842 1,280 7.30 12.3 1.9 -- 607 0 -- 110 54.0

842 -- -- -- -- -- -- -- -- -- --

843 -- 7.70 -- -- 529 868 0 1,070 94.7 51.5

844 -- 7.50 -- -- 554 909 0 1,500 98.4 61.4

845 1,470 7.40 12.8 0.1 -- 853 0 -- 130 56.0

846 -- 8.00 -- -- 317 -- -- -- 195 121

847 -- 8.00 -- -- 187 -- -- -- 143 43.4

848 2,740 8.14 15.2 0.3 -- -- -- -- 20.0 3.10

849 -- 8.10 -- -- 553 -- -- -- 84.0 38.8

850 1,960 8.29 14.6 6.5 -- -- -- -- 15.0 5.60

851 1.460 7.40 12.3 2.0 410 -- -- -- 90,000 79,000

852 1.570 7.42 12.4 0.4 350 -- -- -- <0.4 0.300

853 1.310 7.23 2.2 0.9 380 -- -- -- 79.0 42.0

854 1.451 7.44 11.2 1.0 330 -- -- -- 72.0 37.0

855 590 7.70 13.1 -- -- -- -- -- 19.0 2.40

855 -- -- -- -- -- -- -- -- -- --

856 1,040 7.50 14.5 -- -- -- -- -- 60.0 30.0

857 1,710 7.40 14.1 4.6 -- -- -- -- 28.0 10.0

858 2,160 6.70 14.1 1.2 -- -- -- -- 32.0 1.10

859 590 7.60 13.6 7.4 -- -- -- -- 57.0 27.0

860 4,500 6.30 15.3 4.2 -- -- -- -- 63.0 71.0

860 -- -- -- -- -- -- -- -- -- --

861 1,210 7.60 12.7 8.6 -- -- -- -- 73.0 67.0

862 850 7.40 14.5 8.6 -- -- -- -- 68.0 59.0

862 -- -- -- -- -- -- -- -- -- --

863 2,230 8.01 12.3 0.2 -- -- -- -- 52.0 33.0

864 1,860 7.40 13.2 6.7 -- -- -- -- 110 49.0

865 1,560 7.80 14.0 5.7 -- -- -- -- 110 66.0

866 4,050 7.10 18.0 4.1 -- -- -- -- 140 170

866 -- -- -- -- -- -- -- -- -- --

867 1,730 7.50 14.0 1.5 -- -- -- -- 110 65.0
118 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

868 1,530 7.90 15.9 9.7 -- -- -- -- 93.0 84.0

869 1,670 7.70 12.4 1.4 -- -- -- -- 94.0 57.0

870 2,520 7.45 12.2 1.9 360 -- -- 1,800 140 84.0

871 1,308 8.12 21.6 4.0 460 -- -- 800 78.0 58.0

872 6,650 8.42 15.2 2.8 270 -- -- 5,000 200 49.0

873 3,540 8.61 14.2 4.2 52.0 -- -- 1,700 22.0 1.20

874 3,080 7.07 14.9 3.2 350 -- -- 2,800 350 160

875 1,285 8.08 19.8 5.7 190 -- -- 730 32.0 6.40

876 4,000 7.36 16.1 4.8 630 -- -- 3,100 190 200

877 1,186 7.69 17.3 5.1 330 -- -- 680 46.0 39.0

878 1,550 7.17 16.9 1.7 410 -- -- 940 140 42.0

879 1,305 7.07 16.0 5.1 510 -- -- 790 82.0 45.0

880 2,430 6.90 12.5 2.0 520 -- -- 2,100 130 100

881 2,600 7.10 15.2 2.2 440 -- -- 2,300 120 91.0

882 2,180 6.78 13.3 1.1 540 -- -- 1,900 140 98.0

883 3,360 6.88 12.7 2.4 490 -- -- 2,100 110 65.0

884 3,940 7.49 10.9 4.2 610 -- -- 2,700 110 85.0

885 2,780 7.45 10.4 3.6 700 -- -- 1,900 110 65.0

886 -- 7.42 -- -- 746 455 0 -- 57.0 67.0

887 2,710 7.53 11.3 3.3 580 -- -- 1,900 99.0 64.0

888 2,100 6.95 14.0 2.1 430 -- -- 2,000 170 98.0

889 1,317 7.52 12.9 2.0 310 -- -- 810 110 26.0

890 3,270 7.28 11.7 2.2 820 -- -- 2,400 160 87.0

891 1,034 7.05 18.8 3.7 470 -- -- 630 72.0 46.0

892 3,340 7.30 8.3 2.9 800 -- -- 2,400 180 90.0

893 3,050 7.27 11.3 1.9 690 -- -- 2,100 170 83.0

894 3,010 7.22 10.9 1.5 630 -- -- 2,100 160 79.0

895 2,260 7.77 16.3 4.9 240 -- -- 1,400 62.0 46.0

896 1,990 7.17 12.2 1.8 550 -- -- 1,200 92.0 63.0

897 700 7.10 14.4 6.4 -- 459 0 -- 84.0 59.0

898 850 6.90 12.9 -- -- 541 0 -- 63.0 53.0

898 -- -- -- -- -- -- -- -- -- --

899 990 7.50 12.5 -- -- 820 0 -- 67.0 46.0

899 -- -- -- -- -- -- -- -- -- --

900 2,170 7.25 11.1 2.9 600 -- -- 1,400 100 67.0

901 3,090 7.46 12.1 4.4 720 -- -- 2,200 170 85.0

902 2,580 7.37 11.6 2.6 560 -- -- 1,700 130 60.0

903 1,630 7.31 11.6 2.2 440 -- -- 1,000 100 56.0

904 1,990 7.25 11.0 3.4 470 -- -- 1,300 130 76.0

905 2,250 6.50 14.8 1.3 -- 738 0 -- 150 67.0

905 -- -- -- -- -- -- -- -- -- --

906 820 7.70 15.2 -- -- 558 0 -- 50.0 52.0

907 850 7.00 16.8 8.6 -- 476 0 -- 61.0 58.0

907 -- -- -- -- -- -- -- -- -- --

908 5,590 8.00 13.7 2.5 -- 837 0 -- 170 160

908 -- -- -- -- -- -- -- -- -- --

909 2,330 7.35 11.9 1.7 390 -- -- 1,500 130 30.0

910 990 7.50 13.8 10.4 -- 607 0 -- 100 83.0

911 630 8.00 14.5 4.0 -- 410 0 -- 48.0 37.0

912 2,420 8.00 17.3 2.0 -- 673 0 -- 97.0 86.0

913 7,030 7.90 17.9 2.1 -- 476 0 -- 250 47.0

913 -- -- -- -- -- -- -- -- -- --

915 4,430 8.20 12.5 1.1 -- 508 0 -- 5.6 0.320

916 1,760 7.60 18.1 3.2 595 558 28 -- 30.0 1.00

916 -- -- -- -- -- -- -- -- -- --

917 1,870 7.51 11.5 2.6 250 -- -- 1,100 90.0 20.0

918 1,640 7.00 13.2 3.6 -- 574 0 -- 150 66.0

918 -- -- -- -- -- -- -- -- -- --

919 1,600 7.17 15.9 5.2 440 -- -- 1,100 120 45.0

920 839 7.25 15.0 4.0 620 -- -- 1,000 97.0 63.0

921 1,700 7.27 16.9 4.2 500 -- -- 1,100 93.0 45.0

922 1,090 7.20 13.4 6.5 -- 837 0 -- 100 100

923 1,340 7.20 14.0 -- -- 902 0 -- 100 76.0
Appendix 119

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

924 1,140 7.40 14.1 11.3 -- 508 0 -- 100 63.0

924 -- -- -- -- -- -- -- -- -- --

925 1,150 7.30 13.3 -- -- 722 0 -- 100 62.0

925 -- -- -- -- -- -- -- -- -- --

926 1,490 7.30 14.5 7.7 -- 640 0 -- 100 59.0

927 1,940 7.48 14.8 1.8 370 -- -- 1,300 90.0 65.0

928 1,530 7.30 15.2 5.0 -- 591 0 -- 89.0 60.0

928 -- -- -- -- -- -- -- -- -- --

930 1,580 7.60 11.7 2.7 490 -- -- 930 130 41.0

931 2,150 7.45 16.8 3.2 490 -- -- 1,300 1.5 0.660

932 1,750 7.48 17.3 2.8 390 -- -- 1,000 77.0 23.0

933 1,600 7.90 12.5 1.3 -- 886 0 -- 75.0 46.0

934 1,420 7.90 12.3 1.4 -- 804 0 -- 72.0 47.0

934 -- -- -- -- -- -- -- -- -- --

935 2,780 7.81 7.6 2.5 710 -- -- 1,700 72.0 69.0

936 497 8.70 7.6 2.4 400 -- -- 870 21.0 31.0

937 2,140 7.72 7.0 1.7 490 -- -- 1,300 96.0 43.0

938 950 7.84 9.1 1.6 240 -- -- 460 16.0 11.0

939 232 8.47 8.4 1.0 310 -- -- 1,300 58.0 18.0

940 1 7.82 10.0 0.9 530 -- -- 1,700 77.0 59.0

941 2,070 7.78 8.7 1.6 550 -- -- 1,300 67.0 49.0

942 2,080 7.78 10.4 1.9 580 -- -- 1,300 82.0 48.0

943 2,170 7.85 9.7 1.0 490 -- -- 1,300 72.0 47.0

944 2,590 7.81 6.3 2.1 580 -- -- 1,600 89.0 69.0

945 1,600 7.30 10.6 1.2 350 -- -- 1,000 140 45.0

946 1,550 8.93 10.0 2.0 180 -- -- 830 6.9 1.40

947 1,680 7.90 10.8 1.9 390 -- -- 960 0.5 0.260

948 -- 7.88 11.6 2.2 520 -- -- 1,400 88.0 49.0

949 2,390 8.47 11.9 0.7 310 -- -- 1,400 33.0 20.0

950 872 7.94 9.1 2.1 370 -- -- 810 74.0 42.0

951 2,340 8.00 9.3 1.2 540 -- -- 1,600 93.0 56.0

952 1,950 7.88 11.7 2.0 480 -- -- 1,200 70.0 44.0

953 1,920 8.00 10.8 1.3 510 -- -- 1,200 84.0 45.0

954 1,530 8.60 11.2 0.9 290 -- -- 870 40.0 21.0

955 1,480 7.76 8.3 2.7 400 -- -- 860 98.0 43.0

956 1,840 8.08 9.9 1.9 470 -- -- 1,200 79.0 43.0

957 1,580 7.60 11.4 1.9 440 -- -- 970 100 56.0

958 1,449 7.81 9.9 1.8 380 -- -- 860 90.0 50.0

959 1,520 7.91 8.5 1.1 380 -- -- 850 78.0 43.0

960 931 7.78 9.0 1.8 490 -- -- 870 98.0 56.0

961 1,485 8.22 13.9 3.0 300 -- -- 850 31.0 17.0

962 443 7.76 6.5 1.2 390 -- -- 820 93.0 48.0

963 1,670 7.97 17.3 1.4 290 -- -- 1,100 29.0 8.50

964 1,550 7.88 8.0 1.8 380 -- -- 880 86.0 48.0

965 1,254 7.77 12.0 1.2 310 -- -- 840 83.0 43.0

966 1,510 7.76 12.0 1.5 220 -- -- 880 97.0 46.0

967 1,740 8.01 11.3 3.4 480 -- -- 1,100 76.0 41.0

968 2,280 7.91 10.1 2.0 530 -- -- 1,500 87.0 56.0

969 1,520 7.74 11.6 2.6 420 -- -- 940 89.0 47.0

970 2,910 8.02 9.5 1.3 450 -- -- 1,900 56.0 24.0

971 1,670 7.78 9.5 1.9 390 -- -- 1,000 90.0 50.0

972 2,000 8.24 13.2 1.4 530 -- -- 1,200 69.0 56.0

973 2,570 8.17 13.2 1.2 380 -- -- 1,600 58.0 57.0

974 1,457 7.54 10.5 4.5 380 -- -- 880 100 64.0

975 1,373 7.77 11.2 3.0 390 -- -- 870 2.1 1.70

976 1,294 7.87 8.5 2.6 400 -- -- 740 79.0 49.0

977 2,110 7.98 11.6 1.4 360 -- -- 1,300 83.0 45.0

978 1,560 7.55 10.1 4.9 430 -- -- 970 98.0 65.0

979 981 7.66 10.0 3.2 500 -- -- 1,000 89.0 55.0

980 1,840 7.49 11.8 1.3 350 -- -- 1,100 100 52.0

981 1,780 8.16 12.7 1.6 570 -- -- 1,100 68.0 47.0

982 1,580 7.50 12.8 4.8 400 -- -- 970 96.0 63.0

983 2,120 7.43 12.6 2.3 360 -- -- 1,400 120 61.0
120 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

984 1,496 7.48 10.6 4.6 400 -- -- 920 96.0 64.0

985 1,720 7.58 10.4 4.7 400 -- -- 1,100 95.0 65.0

986 1,670 7.62 10.8 4.2 360 -- -- 1,100 84.0 56.0

987 1,178 7.60 14.3 7.1 240 -- -- 650 76.0 31.0

988 1,510 7.48 12.3 4.5 390 -- -- 950 100 66.0

989 1,432 7.57 11.3 4.4 380 -- -- 880 90.0 49.0

990 1,375 7.81 9.6 5.7 430 -- -- 790 86.0 73.0

991 2,440 7.36 12.8 1.2 460 -- -- 1,600 150 67.0

992 2,350 7.38 11.8 1.4 460 -- -- 1,500 120 62.0

993 2,330 7.99 10.2 1.0 490 -- -- 1,500 100 74.0

994 2,600 8.05 13.1 2.8 490 -- -- 1,900 150 95.0

995 1,620 8.01 12.4 1.2 440 -- -- 1,000 81.0 53.0

996 1,377 7.66 10.8 4.3 340 -- -- 780 89.0 82.0

997 1,740 8.19 14.3 1.5 530 -- -- 1,000 68.0 49.0

998 1,382 7.65 10.5 4.0 360 -- -- 800 90.0 79.0

999 1,660 8.12 15.2 4.0 500 -- -- 1,000 92.0 54.0

1000 2,480 8.17 13.3 1.6 480 -- -- 1,600 110 71.0

1001 1,640 7.85 14.1 5.2 450 -- -- 1,000 86.0 83.0

1002 1,377 8.02 13.6 1.5 360 -- -- 840 64.0 47.0

1003 2,500 7.89 13.9 2.4 400 -- -- 1,600 87.0 49.0

1004 3,020 8.10 12.1 1.8 490 -- -- 2,000 120 70.0

1005 3,350 8.16 13.8 1.9 560 -- -- 2,300 140 83.0

1006 1,760 8.05 13.3 5.2 510 -- -- 1,000 81.0 75.0

1007 2,240 8.63 16.5 1.0 600 -- -- 1,400 19.0 14.0

1008 4,770 7.83 13.5 2.5 590 -- -- 3,800 340 170

1009 6,300 8.28 16.3 2.5 620 -- -- 4,600 110 65.0

1010 5,970 8.42 13.6 4.9 600 -- -- 4,000 120 100

1011 13,170 7.79 18.7 5.4 140 -- -- 9,000 230 73.0

1012 1,560 7.49 14.1 6.1 360 -- -- 960 65.0 60.0

1013 6,070 7.67 14.9 1.7 610 -- -- 4,300 130 70.0

1014 5,490 7.30 19.1 1.4 840 -- -- 3,800 150 85.0

1015 7,030 7.55 18.2 0.8 480 -- -- 5,100 120 70.0

1016 5,800 7.29 18.7 2.0 500 -- -- 4,300 200 120

1017 6,670 7.51 23.9 3.0 440 -- -- 4,800 200 110

1018 10,180 7.21 14.9 2.1 720 -- -- 8,000 290 240

1019 5,050 7.60 20.6 5.3 540 -- -- 5,600 170 140

1020 6,170 7.70 19.6 0.7 400 -- -- 4,200 81.0 23.0

1021 11,440 7.70 16.9 3.8 190 -- -- 8,300 87.0 51.0

1022 8,950 7.56 14.8 3.4 500 -- -- 6,700 180 150

1023 2,260 7.60 18.2 6.6 270 -- -- 1,700 160 67.0

1024 4,560 7.52 18.3 6.4 400 -- -- 2,900 140 59.0

1025 6,000 7.84 17.1 2.0 540 -- -- 4,200 36.0 86.0

1026 1,370 8.67 11.4 6.9 1,000 -- -- 850 83.0 46.0

1027 1,350 8.12 21.4 6.4 530 -- -- 850 78.0 45.0

1028 2,520 7.50 13.3 -- -- -- -- 2,029 69.1 64.7

1029 1,370 8.67 11.4 6.9 -- -- -- -- -- --

1030 -- 7.40 -- -- 242 -- -- 430 118 23.3

1031 -- 7.80 -- -- 264 -- -- 340 75.5 39.9

1032 -- 7.70 -- -- 260 -- -- 410 77.1 31.2

1033 -- 7.50 -- -- 360 -- -- 420 106 33.5

1034 6,650 6.92 11.2 1.7 754 -- -- 6,726 516 523

1038 2,000 -- 12.0 -- -- 340 -- -- 41.0 120

1039 7,000 7.20 13.0 -- -- -- -- -- -- --

1051 -- 7.40 47.5 -- 723 441 0 -- 900 120

1052 320 6.80 18.5 -- -- -- -- -- -- --

1053 180 7.20 20.5 -- -- -- -- -- -- --

1054 1,690 7.60 17.5 -- -- -- -- -- 64.0 110

1055 2,060 7.10 12.0 -- 1,383 844 0 -- 110 110

1057 1,295 8.60 14.0 -- 1,017 601 19 -- 31.0 57.0

1058 5,340 8.50 17.5 -- 6,015 3,480 187 -- 11.0 4.50

1059 7,100 8.00 21.0 -- 11,112 6,780 0 -- 4.0 3.00

1062 23,000 7.90 15.3 -- 27,699 16,900 0 -- 8.5 21.0

1064 1,900 7.90 19.0 -- -- -- -- -- -- --
Appendix 121

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1065 2,100 8.10 19.8 -- -- -- -- -- -- --

1066 1,950 7.80 18.0 -- -- -- -- -- -- --

1067 1,500 8.40 21.0 -- -- -- -- -- -- --

1068 9,190 8.90 20.0 -- -- -- -- -- 18.0 64.0

1069 8,550 7.70 16.0 -- -- -- -- -- 5.0 6.90

1070 -- -- 25.0 -- -- -- -- -- -- --

1071 1,120 8.30 16.0 -- -- -- -- -- 6.6 12.0

1073 2,300 8.20 11.0 -- 1,069 652 0 -- 77.0 150

1080 1,330 7.90 14.0 -- -- -- -- -- 26.0 54.0

1081 38,300 8.30 20.5 -- 50,937 29,400 1,650 33,300 4.2 2.80

1084 30,000 7.70 17.0 -- 43,270 26400 0 -- 6.3 14.0

1085 669 7.80 11.0 -- 397 242 0 -- 32.0 40.0

1091 4,664 8.40 9.0 -- 4,852 2,660 295 -- 14.0 67.0

1094 29,400 8.30 25.6 -- 4,423 2,200 490 24,700 4.7 6.20

1095 29,400 8.30 25.6 -- 4,423 2,200 490 24,700 4.7 6.20

1096 2,950 7.70 11.0 -- 2,819 1,720 0 -- 21.0 86.0

1099 1,700 6.40 19.0 -- -- -- -- -- -- --

1100 2,760 7.60 9.5 -- 1,737 1,060 0 -- 49.0 150

1101 595 7.00 13.0 -- -- -- -- -- -- --

1107 680 -- 6.0 -- -- -- -- -- -- --

1125 5,000 7.70 9.0 -- -- -- -- -- -- --

1130 1,080 7.50 13.2 -- -- -- -- 764 47.5 29.2

1141 950 6.80 14.0 -- -- -- -- -- -- --

1142 827 8.10 19.0 -- 836 510 0 -- 5.4 3.90

1144 4,170 7.40 12.8 -- -- -- -- -- 220 240

1146 -- -- 9.0 -- -- -- -- -- -- --

1147 -- -- 18.0 -- -- -- -- -- -- --

1149 5,600 8.20 15.0 -- -- -- -- -- -- --

1153 2,100 7.50 12.0 -- -- -- -- -- -- --

1154 3,250 7.70 12.0 -- -- -- -- -- -- --

1160 1,340 7.60 14.0 -- 654 399 0 -- 30.0 27.0

1164 1,300 7.40 19.0 -- -- -- -- -- -- --

1173 500 8.00 19.0 -- -- -- -- -- -- --

1174 10,000 7.35 36.0 -- -- -- -- -- 31.0 8.70

1175 650 8.00 14.0 -- -- -- -- -- 47.0 18.0

1176 -- 7.80 -- -- -- -- -- -- 28.0 25.0

1177 -- 7.80 -- -- -- -- -- -- 47.0 17.0

1178 669 8.10 12.5 -- 557 340 0 -- 15.0 9.80

1182 1,010 8.50 26.0 -- 946 570 7 -- 3.4 6.10

1185 1,510 7.60 14.0 -- 997 608 0 -- 27.0 56.0

1186 1,010 7.60 10.0 -- 785 479 0 -- 76.0 43.0

1187 1,600 6.70 -- -- -- -- -- -- -- --

1188 1,390 7.60 9.0 -- -- -- -- -- 97.0 71.0

1189 1,180 8.20 29.0 -- -- -- -- -- 4.4 2.50

1190 1,250 8.50 -- -- -- -- -- -- 21.0 48.0

1191 1,200 7.70 9.8 -- -- -- -- -- 74.0 63.0

1192 1,470 7.80 -- -- -- -- -- -- 96.0 65.0

1193 962 8.40 -- -- -- -- -- -- 10.0 8.00

1194 1,940 8.30 25.5 -- -- -- -- -- 5.0 3.20

1195 2,400 8.10 -- -- -- -- -- -- 8.8 8.40

1196 1,550 7.60 8.5 -- -- -- -- -- 100 91.0

1197 1,010 8.20 18.5 -- -- -- -- -- 23.0 16.0

1198 38,000 7.70 26.0 -- -- -- -- -- 9.5 4.30

1199 1,790 7.60 -- -- -- -- -- -- 100 110

1200 3,050 6.40 -- -- -- -- -- -- 57.0 250

1201 3,040 8.40 29.0 -- -- -- -- -- 6.3 3.10

1202 2,520 8.40 25.0 -- -- -- -- -- 9.2 7.40

1203 1,800 8.30 16.0 -- -- -- -- -- 4.7 3.80

1204 2,180 8.40 23.0 -- -- -- -- -- 13.0 4.50

1205 3,900 7.40 29.0 -- -- -- -- -- 11.0 11.0

1206 2,540 8.10 -- -- -- -- -- -- 8.3 7.20

1207 1,230 8.30 -- -- -- -- -- -- 4.7 3.00
122 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1208 1,340 8.00 -- -- -- -- -- -- 33.0 31.0

1209 1,430 7.90 -- -- -- -- -- -- 47.0 49.0

1210 1,280 7.50 7.0 -- -- -- -- -- 77.0 71.0

1211 1,830 7.50 10.2 -- -- -- -- -- 70.0 78.0

1213 2,600 8.30 28.5 -- 3,065 1,870 0 -- 4.5 2.90

1230 1,780 8.10 -- -- -- -- -- -- 46.0 42.0

1237 1,511 7.70 14.0 -- 1,128 688 0 -- 78.0 73.0

1239 1,700 8.80 16.0 -- 992 605 0 -- 75.0 90.0

1244 620 7.40 15.5 -- -- -- -- 510 87.0 27.0

1250 2,580 7.30 10.6 -- -- -- -- -- 250 190

1251 1,900 7.20 13.0 -- -- -- -- -- -- --

1252 1,800 6.80 19.5 -- -- -- -- -- -- --

1253 5,800 7.40 11.0 -- -- -- -- -- 230 450

1254 -- -- 10.0 -- -- -- -- -- -- --

1256 875 -- 18.0 -- -- -- -- -- -- --

1260 -- -- 10.0 -- -- -- -- -- -- --

1265 745 -- 18.0 -- -- -- -- -- -- --

1267 -- -- 10.0 -- -- -- -- -- -- --

1272 2,400 7.00 10.0 -- -- -- -- -- -- --

1273 -- -- 10.0 -- -- -- -- -- -- --

1277 580 7.20 11.0 -- 392 239 0 -- 51.0 25.0

1282 1,790 7.20 8.0 -- -- -- -- -- -- --

1297 925 7.10 14.0 -- -- -- -- -- -- --

1302 4,000 8.40 8.5 -- -- -- -- -- -- --

1305 1,400 7.50 12.0 -- 1,052 642 0 -- 65.0 51.0

1306 -- -- 15.0 -- -- -- -- -- -- --

1307 2,400 8.40 15.0 -- -- -- -- -- -- --

1317 962 7.50 10.8 -- -- -- -- 816 111 60.5

1318 3,350 7.50 13.5 -- -- -- -- 2,768 504 138

1321 2,800 8.50 25.0 0.1 -- -- -- -- 4.3 5.70

1327 7,000 7.40 11.0 -- -- -- -- -- -- --

1328 2,580 8.30 17.5 -- 2,770 1,690 0 -- 1.7 1.20

1329 -- -- 17.5 -- -- -- -- -- -- --

1330 -- -- -- -- -- 1,507 -- -- 6.0 6.00

1333 9,300 8.10 15.0 -- -- -- -- -- -- --

1369 3,100 7.30 14.0 -- -- -- -- -- -- --

1371 362 7.90 -- -- 364 222 0 214 22.0 11.0

1381 4,200 7.20 12.0 -- -- -- -- -- -- --

1382 1,290 7.20 10.0 -- -- -- -- -- -- --

1383 1,400 7.20 11.0 -- -- -- -- -- -- --

1387 600 7.30 11.0 -- -- -- -- -- -- --

1388 1,010 7.20 12.5 -- -- -- -- -- -- --

1389 26,100 8.20 15.0 -- -- -- -- -- 870 200

1390 32,200 7.80 16.0 -- -- -- -- -- 2,500 790

1391 1,590 10.80 16.0 -- -- -- -- -- 190 2.00

1392 26,500 7.80 14.5 -- -- -- -- -- 490 130

1393 15,300 8.00 16.0 -- -- -- -- -- 480 660

1395 -- -- 10.0 -- -- -- -- -- -- --

1403 390 7.60 11.5 -- -- -- -- -- -- --

1409 1,190 7.30 10.0 -- -- -- -- -- -- --

1410 790 7.50 14.5 -- 580 354 0 -- 68.0 44.0

1411 440 7.00 15.0 -- -- -- -- -- -- --

1415 925 6.60 14.0 -- -- -- -- -- -- --

1416 900 7.20 10.0 -- -- -- -- -- -- --

1418 1,090 7.70 14.5 -- 1,164 710 0 -- 37.0 21.0

1419 883 7.20 12.4 -- -- -- -- 701 132 40.0

1420 975 7.50 11.6 -- -- -- -- 794 91.0 58.1

1421 570 7.10 5.0 -- -- -- -- -- 63.0 24.0

1422 1,340 7.90 9.0 -- -- -- -- -- 65.0 83.0

1423 3,300 7.70 18.5 -- -- -- -- -- 6.4 6.60

1426 1,390 -- 19.0 -- -- 749 -- -- 5.6 4.60

1433 1,260 7.70 17.5 -- 1,319 805 0 -- 15.0 4.20

1438 1,650 7.00 13.5 -- 964 588 0 -- 88.0 95.0
Appendix 123

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1443 1,780 7.90 12.0 -- 1,041 635 0 -- 100 110

1445 1,020 8.70 8.0 -- 842 464 49 -- 37.0 74.0

1448 1,320 8.30 9.0 -- 1,147 700 0 -- 49.0 59.0

1450 1,480 9.20 9.5 -- 1,298 674 116 -- 32.0 50.0

1452 1,860 8.10 9.5 -- 1,316 803 0 -- 80.0 100

1454 1,450 7.80 15.5 -- -- -- -- -- 34.0 56.0

1461 1,100 7.30 13.0 -- -- -- -- -- -- --

1463 1,300 8.00 15.0 -- -- -- -- -- -- --

1464 1,750 7.10 11.0 -- -- -- -- -- -- --

1465 1,220 7.40 19.0 -- -- -- -- -- -- --

1466 4,050 8.05 25.0 -- -- -- -- -- 4.5 24.0

1467 1,700 7.00 16.0 -- -- -- -- -- 78.0 90.0

1468 1,480 7.40 14.0 -- -- -- -- -- 62.0 75.0

1469 3,950 7.70 18.5 -- -- -- -- -- 440 300

1475 1,710 7.28 13.5 0.1 454 -- -- -- 120 98.0

1476 1,780 7.43 13.0 0.1 377 -- -- -- 130 94.0

1477 1,725 7.55 17.0 -- -- -- -- -- 55.0 48.0

1478 3,920 8.10 25.6 -- 3,393 2,070 0 -- 14.0 17.0

1480 7,400 8.30 19.0 -- 7,900 4,820 0 -- 9.5 11.0

1482 1,520 7.50 12.0 -- 1,033 630 0 -- 86.0 57.0

1484 1,750 -- 18.0 -- -- 1,090 -- -- 190 46.0

1486 1,300 7.75 18.5 -- 836 510 0 -- 28.0 69.0

1487 1,400 7.50 18.5 -- 656 400 0 -- 27.0 74.0

1488 1,250 7.30 15.0 -- 852 520 0 -- 49.0 80.0

1492 2,210 7.70 14.5 -- 2,196 1,340 0 -- 10.0 14.0

1497 1,720 7.00 11.5 -- -- -- -- -- -- --

1498 560 8.00 9.0 -- 413 252 0 -- 73.0 18.0

1499 1,490 -- 15.0 -- -- 990 -- -- 1.1 0.300

1502 850 8.30 11.0 -- 770 470 0 -- 18.0 16.0

1506 900 8.00 19.0 -- -- -- -- -- -- --

1507 3,130 8.50 16.0 -- -- -- -- -- 10.0 2.80

1508 1,400 8.20 16.0 -- -- -- -- -- 11.0 8.50

1509 11,800 -- -- -- -- -- -- -- -- --

1510 1,280 -- -- -- -- -- -- -- -- --

1512 840 8.10 13.5 -- -- -- -- -- 7.8 6.60

1513 1,650 8.20 18.5 -- -- -- -- -- 3.6 2.10

1514 64,800 7.86 -- -- 48,800 -- -- 66,630 2.2 1.12

1515 2,190 8.04 -- -- 1,254 -- -- 1,400 5.1 2.92

1516 18,700 7.83 -- -- 12,800 -- -- 14,570 5.6 15.7

1517 36,200 7.95 -- -- 28,900 -- -- 33,340 6.7 8.84

1518 1,510 8.90 16.0 -- 1,016 620 0 -- 24.0 60.0

1519 1,600 -- 18.0 -- -- 590 -- -- 41.0 85.0

1523 2,650 8.00 11.5 -- 3,081 1,880 0 -- 18.0 34.0

1526 4,880 8.40 16.5 -- 6,503 3,560 401 -- 2.9 3.60

1530 14,800 8.10 12.5 -- 20,815 12,700 0 -- 13.0 26.0

1532 6,000 8.40 7.5 -- 3,843 2,200 142 -- 4.8 81.0

1535 4,790 7.81 -- -- 1,022 -- -- 3,664 63.5 245

1536 8,800 8.50 13.5 -- 11,702 7,140 0 -- 2.4 8.30

1538 24,800 8.42 -- -- 17,700 -- -- 20,272 3.9 2.99

1539 40,800 7.90 -- -- 33,100 -- -- 1,890 9.1 5.75

1539 41,100 7.89 -- -- 33,100 -- -- 1,900 8.9 5.88

1540 2,230 8.77 -- -- 1,500 -- -- 1,724 5.0 19.9

1541 3,850 6.76 -- -- 863 -- -- 1,912 96.2 23.0

1542 2,690 7.81 -- -- 878 -- -- 1,908 50.8 121

1546 1,580 8.50 15.0 -- -- -- -- 946 8.4 12.0

1547 1,430 8.30 20.5 -- -- -- -- 909 3.7 2.50

1549 3,260 7.80 9.0 -- 1,505 918 0 -- 40.0 110

1552 2,080 7.70 9.0 -- 1,105 674 0 -- 80.0 160

1555 -- 7.17 -- -- -- 1,007 -- -- 102 13.0

1558 1,450 7.10 5.5 -- -- -- -- -- -- --

1559 950 6.70 12.0 -- -- -- -- -- -- --

1560 948 6.40 12.0 -- -- -- -- -- -- --

1561 2,500 7.00 5.5 -- -- -- -- -- -- --
124 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1565 510 7.00 12.0 -- -- -- -- -- -- --

1566 400 7.20 14.0 -- -- -- -- -- -- --

1567 500 7.50 13.0 -- -- -- -- -- -- --

1568 420 7.20 12.5 -- -- -- -- -- -- --

1571 1,100 7.50 9.5 -- 874 533 0 -- 74.0 48.0

1576 2,127 7.50 13.5 -- 1,623 990 0 -- 86.0 99.0

1580 1,140 7.40 8.0 -- 865 528 0 -- 66.0 53.0

1581 6,050 7.70 24.0 -- -- -- -- -- 7.0 5.50

1587 4,236 7.90 12.0 -- 2,344 1,430 0 -- 52.0 110

1592 2,900 6.50 17.0 -- -- -- -- -- -- --

1593 950 -- 17.5 -- -- -- -- -- -- --

1594 -- -- 8.0 -- -- -- -- -- -- --

1595 -- -- 9.0 -- -- -- -- -- -- --

1596 -- -- 13.0 -- -- -- -- -- -- --

1597 -- -- 18.0 -- -- -- -- -- -- --

1598 2,300 7.60 15.0 -- 1,508 920 0 -- 82.0 82.0

1599 2,600 8.30 16.0 -- -- -- -- -- -- --

1600 1,500 7.60 17.5 -- -- -- -- -- -- --

1601 21,000 7.20 10.5 -- -- -- -- -- -- --

1602 5,020 8.50 27.0 -- -- -- -- -- 14.0 25.0

1603 1,390 7.90 17.0 -- -- -- -- -- 28.0 28.0

1604 5,590 8.00 25.0 -- -- -- -- -- 2.9 3.40

1605 3,600 7.65 25.0 -- -- -- -- -- 14.0 17.0

1607 1,570 7.50 9.0 -- 903 551 0 -- 120 90.0

1609 2,060 7.50 8.0 -- 1,108 676 0 -- 87.0 130

1610 4,180 8.70 26.1 -- 3,902 2,160 217 -- 7.1 11.0

1612 6,570 8.20 32.0 -- 7,523 4,590 0 -- 2.8 4.00

1613 1,200 8.10 20.0 -- -- -- -- 742 9.6 14.0

1614 1,590 7.90 23.0 -- -- -- -- 944 8.4 3.70

1617 4,080 8.20 29.0 -- 5,212 3,180 0 -- 3.6 3.40

1622 -- -- 17.0 -- -- -- -- -- 280 12.0

1623 1,200 7.30 9.0 -- -- -- -- -- 84.0 74.0

1626 955 7.90 9.5 -- 693 423 0 -- 65.0 52.0

1628 1,230 8.10 11.0 -- 857 523 0 -- 79.0 72.0

1631 -- 7.50 -- -- -- -- -- -- -- --

1632 5,400 6.40 16.3 -- -- -- -- -- 560 270

1633 4,110 6.71 10.8 0.2 -- -- -- 3,820 540 200

1634 4,650 6.82 12.2 0.9 330 403 0 4,430 500 190

1635 18,880 7.26 14.0 -- 807 -- -- -- 82.8 28.8

1636 20,100 6.97 14.4 -- -- -- -- -- -- --

1639 5,960 6.88 15.6 -- -- -- -- -- -- --

1640 995 8.12 24.0 -- -- -- -- -- 74.2 29.8

1641 4,120 7.50 8.4 -- -- -- -- -- -- --

1642 5,580 7.11 18.4 -- -- -- -- -- -- --

1643 16,700 7.28 14.1 -- -- -- -- -- -- --

1644 3,560 7.14 12.0 -- -- -- -- -- -- --

1645 4,980 7.28 10.4 -- -- -- -- -- -- --

1646 3,030 -- 8.1 -- -- -- -- -- -- --

1647 3,680 -- 8.6 -- -- -- -- -- -- --

1648 4,600 7.10 11.6 -- -- -- -- -- -- --

1649 7,910 -- 12.4 -- -- -- -- -- -- --

1650 11,900 7.10 16.0 0.2 -- -- -- -- -- --

1651 5,090 7.25 23.5 2.2 -- -- -- -- 384 322

1652 5,880 7.08 23.5 1.8 485 592 -- -- 467 387

1653 6,690 7.19 25.0 0.1 897 1,094 -- -- 518 421

1654 6,250 7.03 12.8 0.7 420 513 0 6,460 480 430

1655 -- 7.40 -- -- -- -- -- -- -- --

1656 -- 7.50 -- -- -- -- -- -- -- --

1657 -- 7.40 -- -- -- -- -- -- -- --

1658 -- 7.50 -- -- -- -- -- -- -- --

1659 -- 7.40 -- -- -- -- -- -- -- --

1660 750 6.80 12.0 -- -- -- -- -- 85.0 39.0

1661 580 7.10 12.0 -- -- -- -- -- 40.0 37.0
Appendix 125

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1662 800 -- 14.0 -- -- -- -- -- 62.0 44.0

1664 -- 7.80 -- -- 366 600 0 410 65.6 39.0

1665 -- 8.00 -- -- 342 561 0 380 65.7 35.4

1666 -- 7.77 -- -- -- -- -- -- 38.0 38.0

1667 -- 7.85 -- -- -- -- -- -- 57.0 34.0

1668 -- 8.00 -- -- -- -- -- -- 54.0 2.30

1669 1,750 7.70 17.0 -- -- -- -- 1,490 75.4 52.9

1670 150 7.00 27.0 -- -- -- -- -- -- --

1671 503 7.90 18.0 -- -- -- -- -- 37.0 10.0

1672 950 8.80 18.0 -- -- -- -- -- 20.0 0.300

1673 980 8.66 6.5 -- -- -- -- -- -- --

1674 907 8.13 2.5 -- -- -- -- -- 65.3 23.1

1675 3,420 8.30 -- -- -- -- -- -- -- --

1676 55 7.50 19.5 -- -- -- -- -- -- --

1677 3,120 7.52 12.5 1.4 450 -- -- 2,220 37.0 56.0

1678 9,000 7.58 4.0 0.9 514 627 -- -- 285 528

1679 1,769 7.61 15.4 1.0 232 -- -- -- 62.5 59.1

1680 2,940 7.43 13.7 0.6 371 -- -- -- 76.8 78.7

1681 10,640 7.44 2.5 -- -- -- -- -- -- --

1682 19,580 6.24 20.0 -- -- -- -- -- -- --

1683 10,200 7.25 25.0 -- -- -- -- -- 494 425

1684 1,090 7.81 11.0 2.3 -- -- -- -- -- --

1685 7,070 8.63 10.0 2.1 -- -- -- -- -- --

1686 4,600 7.04 12.7 0.8 419 -- -- -- 338 220

1687 9,290 10.96 7.0 -- -- -- -- -- -- --

1688 7,440 7.46 7.5 0.6 -- -- -- -- -- --

1689 8,220 7.35 4.5 0.2 525 641 -- -- 608 606

1690 2,330 8.17 10.0 -- -- -- -- -- -- --

1691 13,820 6.91 17.5 -- -- -- -- -- -- --

1692 9,390 7.50 8.5 0.9 -- -- -- -- -- --

1693 4,230 7.55 4.5 1.2 459 560 -- -- 316 234

1694 13,600 6.88 8.0 0.1 -- -- -- -- -- --

1695 12,340 7.28 18.0 -- -- -- -- -- -- --

1696 10,660 7.29 7.0 0.3 589 719 -- -- 517 605

1697 6,560 7.82 7.5 1.5 -- -- -- -- -- --

1699 2,110 7.82 10.0 1.9 -- -- -- -- -- --

1700 10,030 7.43 7.0 0.4 -- -- -- -- -- --

1701 8,530 7.08 6.5 0.4 -- -- -- -- -- --

1702 3,320 7.27 20.0 -- -- -- -- -- 137 136

1703 53,400 7.08 7.0 0.1 -- -- -- -- -- --

1704 17,700 6.90 8.0 -- -- -- -- -- -- --

1705 6,780 6.63 17.5 -- -- -- -- -- -- --

1706 11,210 6.94 21.5 -- -- -- -- -- -- --

1707 9,060 7.33 8.0 2.3 588 717 -- -- 465 556

1708 5,220 7.69 7.0 2.0 -- -- -- -- 307 268

1709 9,510 7.31 8.5 -- -- -- -- -- -- --

1710 11,100 7.14 7.0 0.2 -- -- -- -- -- --

1711 10,840 6.64 18.5 -- -- -- -- -- -- --

1712 9,530 7.26 8.5 0.9 -- -- -- -- -- --

1713 7,760 7.14 22.5 -- -- -- -- -- 430 396

1714 8,040 7.21 5.0 2.2 516 630 -- -- 522 473

1715 9,020 7.23 9.5 1.4 -- -- -- -- -- --

1716 9,540 6.96 10.0 -- -- -- -- -- -- --

1723 2,900 7.20 10.0 -- 951 580 0 -- 140 130

1727 8,500 -- 14.0 -- -- -- -- -- 300 160

1728 5,500 -- 16.0 -- -- -- -- -- 540 160

1730 650 8.40 20.0 -- -- -- -- -- 86.6 16.5

1731 629 -- 18.5 -- -- -- -- -- -- --

1732 560 8.02 19.2 1.4 225 -- -- 316 16.0 8.10

1733 806 9.00 25.5 -- -- -- -- -- 2.0 0.300

1734 817 7.58 19.1 -- -- -- -- -- -- --

1735 6,440 7.26 8.2 -- -- -- -- -- -- --

1736 1,260 7.88 7.8 -- -- -- -- -- -- --
126 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1738 350 7.30 21.0 -- 410 250 0 -- 22.0 6.30

1741 -- 7.50 -- -- -- -- -- -- -- --

1742 -- 7.30 -- -- -- -- -- -- -- --

1743 -- 7.50 -- -- -- -- -- -- -- --

1744 -- 7.30 -- -- -- -- -- -- -- --

1745 -- 7.60 -- -- 447 733 0 430 58.3 41.4

1747 -- -- -- -- -- -- -- -- -- --

1752 532 7.80 14.4 4.4 270 -- -- 640 51.0 60.0

1753 549 8.85 16.1 0.3 290 -- -- 320 49.0 30.0

1754 -- -- -- -- -- -- -- -- -- --

1755 557 7.50 17.2 1.9 260 -- -- 350 34.0 34.0

1756 542 8.88 15.5 3.2 280 -- -- 310 40.0 32.0

1757 588 9.03 19.1 6.4 280 -- -- 360 31.0 41.0

1758 690 7.26 12.6 4.9 260 -- -- 370 48.0 34.0

1759 1,052 9.45 17.1 1.9 290 -- -- 690 18.0 14.0

1760 743 9.08 20.5 5.1 300 -- -- 500 66.0 35.0

1761 -- -- -- -- -- -- -- -- 88.7 42.8

1762 -- -- 12.0 -- -- -- -- -- -- --

1763 300 7.20 -- -- -- -- -- -- 31.8 4.78

1765 6,140 6.57 11.2 0.8 570 696 0 5,910 470 250

1766 14,970 7.17 10.0 0.2 470 574 0 16,100 410 830

1768 4,410 6.67 11.5 0.1 300 366 0 4,490 510 300

1769 4,400 6.58 8.1 1.5 305 372 0 4,030 540 270

1770 600 7.00 20.5 -- -- -- -- -- -- --

1771 820 7.00 13.0 -- -- -- -- -- 51.0 39.0

1772 800 7.10 12.0 -- -- -- -- -- 78.0 40.0

1773 -- 7.40 -- -- 433 -- -- 490 77.2 53.5

1774 -- -- -- -- -- -- -- -- -- --

1776 -- 8.70 -- -- 538 856 28 610 3.9 0.900

1777 -- 9.10 -- -- 313 425 90 450 4.6 4.20

1778 -- 7.70 -- -- 420 689 0 460 68.4 44.2

1779 -- 7.60 -- -- 374 613 0 550 117 38.2

1780 -- 7.40 -- -- 290 476 0 350 85.1 21.9

1781 -- 7.50 -- -- 313 513 0 420 89.7 25.4

1782 -- 9.17 -- -- -- -- -- -- 0.8 <0.1

1783 -- 9.44 -- -- -- -- -- -- 0.6 <0.1

1784 -- 8.33 -- -- -- -- -- -- 1.8 0.380

1785 -- 7.26 -- -- -- -- -- -- <0.4 <0.1

1786 -- 7.38 -- -- -- -- -- -- 60.0 56.0

1787 110 7.20 20.5 -- -- -- -- -- -- --

1788 3,950 7.38 13.3 7.3 220 -- -- 4,100 350 270

1789 910 7.70 21.5 -- -- -- -- -- -- --

1790 1,310 6.90 19.8 -- -- -- -- -- -- --

1791 380 6.50 17.1 -- -- -- -- -- -- --

1792 1,310 6.80 17.8 -- -- -- -- -- -- --

1793 320 7.20 20.1 -- -- -- -- -- -- --

1794 750 6.50 15.0 -- -- -- -- -- 87.0 43.0

1795 780 -- 12.5 -- -- -- -- -- 47.0 46.0

1796 -- 7.60 -- -- 576 -- -- 750 74.2 60.4

1797 -- 7.80 -- -- 402 659 0 450 75.3 32.7

1798 -- 7.70 -- -- 488 800 0 700 79.4 50.3

1799 -- 7.90 -- -- 297 487 0 320 36.3 52.5

1800 -- 7.80 -- -- 394 646 0 490 91.0 19.9

1801 -- 7.70 -- -- 426 699 0 480 65.5 69.8

1802 -- 7.60 -- -- 375 615 0 610 69.7 54.8

1803 -- 7.80 -- -- 539 884 0 630 64.4 77.9

1804 -- 7.80 -- -- 377 618 0 410 77.7 31.2

1805 -- 7.60 -- -- 447 733 0 500 96.6 40.0

1806 -- 7.90 -- -- 264 433 0 310 47.6 30.5

1807 -- 9.45 -- -- 398 -- 152 -- 0.6 <0.1

1807 -- -- -- -- -- -- -- -- -- --

1808 -- 7.36 -- -- -- -- -- -- 200 160

1809 -- 7.48 -- -- -- -- -- -- 61.0 49.0
Appendix 127

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1810 -- 7.43 -- -- -- -- -- -- 68.0 50.0

1811 645 -- 8.9 5.2 340 -- -- 390 55.0 38.0

1812 642 9.19 6.0 5.5 330 -- -- 400 43.0 32.0

1813 1,510 8.48 11.9 3.6 -- -- -- 950 38.0 31.0

1814 524 8.31 6.6 7.6 300 -- -- 320 50.0 41.0

1815 841 9.10 15.9 -- -- -- -- 717 1.5 0.400

1816 874 9.24 3.0 3.1 430 -- -- 540 50.0 56.0

1817 673 9.15 8.2 4.8 340 -- -- 430 59.0 28.0

1818 463 7.57 6.2 8.1 280 -- -- 270 35.0 43.0

1819 962 7.80 12.1 -- -- -- -- 886 56.2 67.7

1820 1,112 7.20 7.4 3.2 480 -- -- 580 69.0 49.0

1821 596 8.28 10.2 6.5 330 -- -- 340 45.0 45.0

1822 499 8.34 15.2 0.9 290 -- -- 270 31.0 34.0

1827 -- -- -- -- -- -- -- -- 68.4 17.9

1828 -- -- -- -- -- -- -- -- 49.1 15.5

1829 -- -- -- -- -- -- -- -- -- --

1830 850 7.10 14.0 -- -- -- -- -- 93.0 20.0

1832 -- 7.70 -- -- 271 -- -- 300 71.5 22.8

1833 900 7.00 11.0 -- -- -- -- -- 60.0 69.0

1837 4,500 7.20 14.0 -- 967 590 0 -- 200 210

1842 2,860 7.34 15.7 1.0 294 -- -- -- 276 121

1843 9,170 7.20 15.8 2.0 850 -- -- -- 378 914

1845 731 -- 21.0 -- -- -- -- -- -- --

1847 5,890 6.20 15.9 3.5 189 -- -- -- 430 489

1855 194 7.10 17.0 2.6 91.8 -- -- -- 28.0 4.00

1856 100 6.20 16.0 2.7 47.6 -- -- -- 15.0 2.10

1857 105 8.10 13.0 2.8 58.4 -- -- -- 16.0 5.10

1858 0 8.00 21.0 3.2 -- -- -- -- 17.0 5.40

1859 195 7.90 17.0 3.1 115 -- -- -- 25.0 5.10

1860 0.10 7.30 21.0 1.4 128 -- -- -- 25.0 11.0

1861 0.20 6.90 16.0 0.4 137 -- -- -- 30.0 13.0

1862 0.38 7.00 13.0 2.6 236 -- -- -- 59.0 21.0

1863 2.19 7.50 16.0 9.7 444 -- -- -- 140 100

1864 2,000 8.10 -- -- -- -- -- -- -- --

1865 4,700 7.60 -- -- -- -- -- -- -- --

1866 741 7.10 -- -- -- -- -- -- -- --

1867 1,210 7.60 -- -- -- -- -- -- -- --

1868 4,300 7.50 -- -- -- -- -- -- -- --

1869 2,750 12.80 -- -- -- -- -- -- -- --

1870 6,100 7.70 -- -- -- -- -- -- -- --

1871 1,280 7.30 -- -- -- -- -- -- -- --

1872 1,370 7.40 -- -- -- -- -- -- -- --

1873 940 7.10 -- -- -- -- -- -- -- --

1874 272 8.50 -- -- -- -- -- -- -- --

1875 6,400 7.10 -- -- -- -- -- -- -- --

1876 9,500 7.10 -- -- -- -- -- -- -- --

1877 3,200 7.10 -- -- -- -- -- -- -- --

1878 3,000 7.30 -- -- -- -- -- -- -- --

1879 4,500 7.00 -- -- -- -- -- -- -- --

1880 5,400 7.20 -- -- -- -- -- -- -- --

1881 2,400 7.30 -- -- -- -- -- -- -- --

1882 460 8.20 -- -- -- -- -- -- -- --

1883 3,400 7.30 -- -- -- -- -- -- -- --

1884 1,350 7.30 -- -- -- -- -- -- -- --

1885 960 7.60 -- -- -- -- -- -- -- --

1886 660 7.80 -- -- -- -- -- -- -- --

1887 345 8.30 18.1 -- -- -- -- 298 38.7 13.8

1888 416 7.00 -- -- -- -- -- -- -- --

1889 1,416 7.50 -- -- -- -- -- -- -- --

1890 -- -- 12.2 -- -- -- -- -- -- --

1891 325 6.30 12.0 -- -- -- -- -- 24.0 16.0

1895 1,850 8.50 16.0 -- -- -- -- -- 3.1 0.500

1896 3,820 9.60 14.0 -- -- -- -- -- 3.0 0.500
128 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

1897 1,230 7.40 13.5 -- -- -- -- -- 62.0 56.0

1898 1,150 7.10 15.5 -- -- -- -- -- 50.0 75.0

1899 626 8.20 14.0 -- -- -- -- -- 25.0 14.0

1900 1,120 8.20 15.5 -- -- -- -- -- 18.0 34.0

1904 640 6.80 15.0 -- -- 421 -- -- 70.0 35.0

1906 550 -- 13.5 -- -- -- -- -- -- --

1907 325 8.30 12.5 -- -- -- -- -- 10.0 9.40

1908 810 -- 13.0 -- -- -- -- -- -- --

1909 0.18 6.60 14.9 7.0 75.1 -- -- -- 20.0 3.20

1910 -- -- -- -- -- -- -- -- -- --

1911 465 7.30 -- -- -- -- -- -- -- --

1912 574 7.10 -- -- -- -- -- -- -- --

1913 686 7.60 14.4 -- -- -- -- 612 58.0 52.9

1914 633 7.70 17.3 -- -- -- -- 532 74.0 32.8

1915 505 8.40 -- -- -- -- -- -- -- --

1916 543 7.43 -- -- -- -- -- -- -- --

1917 571 7.51 -- -- -- -- -- -- -- --

1918 393 7.70 -- -- -- -- -- -- -- --

1919 0.20 7.50 3.0 2.1 28.1 -- -- -- 6.5 2.40

1920 50 6.50 6.0 3.9 29.4 -- -- -- 6.8 2.50

1921 77 6.20 7.0 2.6 45.4 -- -- -- 10.0 4.30

1925 5,040 7.02 5.2 0.5 310 378 0 4,850 440 230

1926 5,270 7.02 8.2 0.4 285 348 0 5,280 420 230

1928 2,830 -- 17.0 -- -- 264 -- -- 560 65.0

1930 70 5.60 -- -- -- -- -- -- 224 52.5

1931 2,100 -- 24.5 -- -- -- -- -- 557 61.8

1932 600 6.90 22.0 -- -- -- -- -- 118 17.0

1937 318 7.30 19.0 2.7 170 -- -- -- 30.0 20.0

1938 110 8.00 15.6 11.7 48.3 -- -- -- 15.0 3.60

1939 231 7.90 20.8 8.0 148 -- -- -- 26.0 15.0

1940 475 7.42 -- -- -- -- -- -- -- --

1941 712 7.50 -- -- -- -- -- -- -- --

1942 324 7.30 -- -- -- -- -- -- -- --

1943 706 7.55 -- -- -- -- -- -- -- --

1944 261 -- 15.0 -- -- -- -- -- -- --

1945 200 -- 15.0 -- -- -- -- -- -- --

1946 0.69 7.74 24.0 -- 246 -- -- -- 78.0 14.0

1947 0.15 7.61 29.6 -- 50.8 -- -- -- 19.0 4.90

1951 2,600 7.50 15.4 -- -- -- -- 2,749 456 139

1955 4,230 7.50 21.5 -- -- -- -- -- 9.0 3.20

1962 2,820 7.10 19.5 -- -- -- -- -- 2.1 0.700

1967 111 6.40 9.8 7.9 61.4 -- -- -- 15.0 6.40

1968 44.6 7.54 11.8 5.6 22.1 -- -- -- 7.8 3.20

1969 167 7.65 18.2 7.5 89.1 -- -- -- 23.0 8.40

1970 78.7 8.06 12.9 6.3 39.9 -- -- -- 11.0 3.80

1971 78 6.88 -- -- 43.2 -- -- -- 14.0 3.70

1972 0.35 7.30 22.0 1.3 229 -- -- -- 45.0 19.0

1973 0.24 7.70 12.0 3.1 173 -- -- -- 19.0 5.00

1974 0.60 7.60 8.0 3.0 38.5 -- -- -- 7.9 3.60

1975 358 7.70 -- -- -- -- -- -- -- --

1976 -- -- -- -- -- -- -- -- -- --

1978 1,110 7.50 15.5 -- -- -- -- -- 15.0 6.20

1981 1,580 7.70 17.0 -- -- -- -- -- -- --

1982 1,650 8.00 14.7 -- -- -- -- -- -- --

1983 875 7.60 9.0 -- -- -- -- -- -- --

1986 1,710 7.49 14.1 -- 348 -- -- -- 110 120

1990 4,800 7.30 42.0 -- -- -- -- -- -- --

1993 491 -- 13.5 -- -- -- -- -- -- --

1995 -- -- 8.6 -- -- -- -- -- -- --

1996 -- -- 13.8 -- -- -- -- -- -- --

2001 910 7.60 13.0 -- 688 420 0 -- 47.0 59.0

2002 860 7.50 14.5 -- 672 410 0 -- 64.0 37.0

2003 900 7.80 9.0 -- -- -- -- -- -- --
Appendix 129

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Specific

conductance

(μs/cm at 25°C)

pH,

standard

units

Temperature,

water,

(°C)

Dissolved

oxygen

(mg/L)

Alkalinity

(mg/L as

CaCO3

)

Bicarbonate

(mg/L)

Carbonate

(mg/L)

Total

dissolved

solids

(mg/L)

Calcium, 

dissolved 

(mg/L)

Magnesium,

dissolved

(mg/L)

2011 540 -- 12.0 -- -- -- -- -- -- --

2012 360 7.20 12.0 -- -- -- -- -- -- --

2013 318 7.30 -- -- -- -- -- -- -- --

2014 1,104 7.70 -- -- -- -- -- -- -- --

2015 1,104 7.70 -- -- 343 -- -- -- 38.0 94.0

2016 761 7.90 13.6 -- -- -- -- 658 49.4 40.3

2017 604 7.90 14.2 -- -- -- -- 558 54.2 44.5

2018 361 8.10 11.6 -- -- -- -- 312 40.6 17.4

2019 -- -- 11.7 -- -- -- -- -- -- --

2020 -- -- 11.3 -- -- -- -- -- -- --

2021 -- -- 9.5 -- -- -- -- -- -- --

2022 -- -- 13.5 -- -- -- -- -- -- --

2023 -- -- 9.4 -- -- -- -- -- -- --

2024 -- -- 11.4 -- -- -- -- -- -- --

2025 280 8.60 10.6 0.3 131 149 5 -- -- --

2027 4,040 6.86 11.7 0.1 330 403 0 3,850 520 180

2029 3,190 -- 14.0 -- -- -- -- -- -- --

2030 -- -- 13.1 -- -- -- -- -- -- --

2033 9,420 7.00 15.0 -- -- 937 -- -- 390 530

2034 -- -- 12.5 -- -- -- -- -- -- --

2035 -- -- 9.1 -- -- -- -- -- -- --

2037 320 7.10 18.0 -- -- -- -- -- -- --

2040 1,210 7.50 17.0 -- -- -- -- -- -- --

2041 1,900 8.20 14.5 -- -- -- -- -- 15.0 7.60

2044 1,430 7.50 15.0 -- 403 246 0 -- 220 36.0

2046 3,830 7.11 16.0 1.7 2,300 2,810 0 2,670 24.0 9.80

2046 3,830 7.11 16.0 1.7 2,300 2,810 0 2,700 23.0 9.80

2049 600 7.80 20.5 -- -- -- -- -- 146 34.6

2050 300 7.20 -- -- -- -- -- -- 76.4 7.20

2051 500 6.80 -- -- -- -- -- -- 118 18.3

2052 2,700 8.70 16.8 -- -- -- -- -- -- --

2053 1,330 7.40 -- -- 688 420 0 -- 160 46.0

2054 965 7.60 10.0 -- 651 397 0 -- 73.0 60.0

2055 750 8.60 -- -- -- -- -- -- -- --

2056 1,022 6.50 14.0 -- -- -- -- -- -- --

2058 1,890 7.80 16.0 -- 1,472 898 0 -- 12.0 5.90

2061 2,640 6.96 12.2 4.7 245 299 0 2,450 540 73.0

2063 4,050 6.50 18.5 -- -- -- -- -- -- --

2064 440 6.80 18.5 -- -- -- -- -- 111 22.3

2065 681 8.40 13.5 -- 647 395 0 -- 59.0 45.0

2066 -- -- 13.5 -- -- -- -- -- -- --

2067 3,400 7.80 17.0 -- -- -- -- -- -- --

2068 <400 7.80 12.5 -- 613 357 17 -- -- --

2069 360 7.10 14.0 -- -- -- -- -- -- --

2070 380 7.00 19.2 -- -- -- -- -- -- --

2071 359 8.20 10.0 -- 349 213 0 -- 22.0 11.0

2072 600 7.90 12.0 -- -- -- -- -- -- --

2076 3,030 7.18 9.4 -- 228 -- -- -- 554 102

2077 -- -- -- -- -- -- -- -- -- --

2078 596 7.50 13.0 -- 351 214 0 -- 39.0 36.0

2079 549 7.50 13.0 -- 465 284 0 -- 50.0 32.0

2080 -- -- 55.0 -- -- -- -- -- -- --

2082 600 9.50 -- -- -- -- -- -- -- --

2083 -- -- 9.0 -- -- -- -- -- -- --

2084 -- -- 16.0 -- -- -- -- -- -- --

2085 2,400 7.30 12.0 -- 1,549 945 0 -- 63.0 83.0

2088 3,240 9.00 -- -- 1,740 964 96 -- 35.0 3.00

2089 860 7.10 -- -- -- -- -- -- -- --

2090 561 7.50 13.5 -- 467 285 0 -- 50.0 35.0

2091 522 7.50 16.5 -- 465 284 0 -- 45.0 30.0

2094 1,190 7.53 -- -- -- -- -- -- -- --

2095 100 6.60 15.8 -- -- -- -- -- 12.2 3.68

2096 42 6.90 11.0 -- -- -- -- -- 6.8 1.33
130 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1 110 2.50 24.8 20.7 -- -- -- <70 <5 --

2 170 0.500 10.0 5.50 7.10 -- -- 2,000 20.0 8.00

3 57.0 0.300 25.0 1.80 0.900 -- -- <10 <10 2.00

4 140 1.40 30.0 7.20 2.20 -- -- 130 20.0 1,100

5 1,290 9.00 3,200 157 0.680 0.15 2.70 <50 170 <3

6 -- -- -- -- -- -- -- -- -- --

8 -- -- -- -- -- -- -- -- -- --

9 28.5 0.300 29.0 1.50 0.100 -- <0.29 <70 <5 <1

13 89.6 4.49 236 63.1 0.813 -- -- -- -- --

14 99.6 7.85 369 31.6 0.209 -- -- -- -- --

15 80.6 9.00 384 47.3 0.249 -- -- -- -- --

16 61.2 2.69 369 15.8 0.222 -- -- -- -- --

17 -- -- -- -- -- -- -- <70 -- --

18 -- -- -- -- -- -- -- <70 -- --

19 -- -- -- -- -- -- -- <70 -- --

20 -- -- -- -- -- -- -- <70 -- --

21 -- -- -- -- -- -- -- <70 -- --

22 -- -- -- -- -- -- -- <70 -- --

23 -- -- -- -- -- -- -- <70 -- --

24 -- -- -- -- -- -- -- <70 -- --

25 -- -- -- -- -- -- -- <70 -- --

26 -- -- -- -- -- -- -- <70 -- --

27 -- -- -- -- -- -- -- <70 -- --

28 -- -- -- -- -- -- -- <70 -- --

29 -- -- -- -- -- -- -- -- -- --

30 350 6.30 1,700 14.0 0.340 -- <0.29 650 140 --

31 -- -- -- -- -- -- -- -- -- --

33 -- -- -- -- -- -- -- -- -- --

34 -- -- -- -- -- -- -- -- -- --

36 -- -- -- -- -- -- -- -- -- --

38 80.0 1.40 190 12.0 0.700 -- -- 170 <10 3.00

39 220 0.700 8.70 10.0 5.60 -- -- 20 20.0 8.00

40 73.0 3.10 190 50.0 0.640 -- 0.99 <70 <5 <1

41 50.0 2.30 110 30.0 0.530 -- 0.41 <70 <5 <1

42 62.3 7.70 120 16.0 0.200 -- -- -- <5 --

43 75.0 2.40 120 35.0 0.410 <0.1 0.14 <70 <10 <20

44 83.0 3.10 130 40.0 0.430 <0.1 0.22 <70 <10 <20

45 93.0 2.90 140 56.0 0.670 <0.1 0.25 <70 <10 <20

46 57.0 0.920 86.0 14.0 0.130 <0.1 0.036 <70 <10 <20

47 23.0 1.20 21.0 2.00 0.290 <0.1 0.047 <70 <10 <20

48 39.0 2.00 60.0 16.0 0.300 <0.1 0.16 <70 <10 <20

49 64.0 2.80 190 44.0 0.330 <0.1 1.06 <70 <10 <20

50 75.5 8.99 362 108 0.929 0.24 1.20 9.1 2.12 --

51 420 4.00 11.2 19.0 0.640 -- 0.45 -- <5 --

52 81.0 4.80 29.0 8.80 1.40 -- -- -- -- --

53 67.0 1.90 31.8 6.00 1.10 -- 0.61 -- -- --

54 18.0 1.70 9.50 7.80 0.250 -- 0.55 -- -- --

55 74.3 5.00 20.0 10.0 0.600 -- -- -- 8.00 --

56 96.0 4.70 401 40.6 1.60 -- 0.079 -- -- --

57 230 2.10 622 102 5.60 -- 0.081 -- -- --

58 51.0 5.30 117 6.30 1.30 -- 0.14 -- -- --

59 90.0 6.20 72.2 30.6 1.40 -- 0.10 -- -- --

60 130 14.0 60.0 28.3 0.980 -- 0.17 -- -- --

61 30.0 -- 14.0 5.30 1.00 -- 0.21 -- -- --

62 -- -- 33.0 12.0 0.600 -- <0.29 -- -- <1

63 93.0 -- -- 18.7 -- -- -- -- -- --

64 -- -- -- -- -- -- -- -- -- --

65 260 -- -- 30.4 -- -- -- -- -- --

66 320 -- -- 64.4 -- -- -- -- -- --

67 195 0.500 30.0 35.0 5.10 -- <0.29 -- -- --

68 140 1.30 140 21.0 1.10 -- 0.23 -- -- --

69 350 -- -- -- -- -- -- -- -- --
Appendix 131

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

70 440 -- -- -- -- -- -- -- -- --

71 160 4.60 69.0 32.0 0.980 -- 0.22 -- -- --

72 61.0 1.90 27.0 5.20 0.870 -- 0.27 -- -- --

73 95.0 3.60 42.0 5.80 1.30 -- 0.34 -- -- --

74 98.0 3.60 45.0 6.10 1.20 -- 0.32 -- -- --

75 120 7.20 38.0 7.30 0.440 -- 0.27 -- -- --

76 87.0 5.70 180 38.0 0.250 -- 0.32 -- -- --

77 249 0.600 20.0 151 3.50 0.90 <0.29 -- -- --

78 205 1.10 20.0 7.00 1.70 <0.1 0.21 -- -- --

79 60.0 0.810 45.4 5.67 1.20 0.080 <0.29 <70 35.0 --

80 80.0 4.70 25.0 10.0 1.00 <0.1 0.29 <70 <10 --

81 28.6 2.94 16.8 3.51 0.820 <0.1 0.41 <70 <5 --

82 24.8 1.99 24.2 7.11 0.680 0.050 3.91 <70 <5 --

83 200 1.07 114 93.1 0.700 0.52 19.45 392 <5 --

84 179 0.706 80.9 65.5 1.60 0.33 12.83 <70 18.9 --

85 215 0.590 56.6 115 3.00 0.55 6.42 <70 44.7 --

86 74.0 2.10 34.0 8.00 0.570 <0.1 <0.29 <70 1,800 --

87 49.5 48.6 70.4 54.8 0.820 0.14 21.42 <70 30.1 --

88 45.9 3.11 18.8 5.42 0.890 0.090 <0.29 <70 459 --

89 197 0.415 8.30 69.3 3.30 0.33 0.11 <70 <5 --

90 -- -- -- 12.7 -- -- -- -- -- --

91 249 0.600 20.0 151 3.50 -- <0.29 <70 19.0 0.003

92 55.0 5.20 68.0 9.90 0.880 -- 0.34 <70 <5 --

93 200 0.380 1.10 105 3.00 -- <0.29 420 27.0 --

94 96.0 4.70 401 40.6 1.60 -- 0.079 2,200 48.0 --

95 230 2.10 622 102 5.60 -- 0.081 210 140 --

96 90.0 6.20 72.2 30.6 1.40 -- 0.10 1,300 220 --

97 51.0 5.30 117 6.30 1.30 -- 0.14 930 14.0 --

98 260 -- -- -- -- -- -- -- -- --

99 130 -- -- -- -- -- -- -- -- --

100 130 -- -- -- -- -- -- -- -- --

101 150 -- -- -- -- -- -- -- -- --

102 66.0 -- -- -- -- -- -- -- -- --

103 41.0 -- -- -- -- -- -- -- -- --

104 96.0 -- -- -- -- -- -- -- -- --

105 84.0 -- -- 4.30 -- -- -- -- -- --

106 49.0 -- -- -- -- -- -- -- -- --

107 53.0 -- -- 4.80 -- -- -- -- -- --

108 180 <0.5 19.0 26.0 5.00 -- <0.29 310 13.0 --

109 174 0.395 35.7 56.7 4.30 -- <0.29 <70 5.42 --

110 219 0.816 49.0 137 5.50 -- <0.29 <70 6.60 --

111 43.0 1.40 40.0 3.59 1.40 -- 0.19 <70 <5 --

112 33.0 3.20 31.1 6.32 0.620 -- <0.29 410 2,100 --

113 260 -- -- -- -- -- -- -- -- --

114 260 -- -- -- -- -- -- -- -- --

115 68.0 -- -- -- -- -- -- -- -- --

116 -- -- -- -- -- -- -- -- -- --

117 160 -- -- -- -- -- -- -- -- --

118 37.0 -- -- 32.5 -- -- -- -- -- --

119 86.0 -- -- -- -- -- -- -- -- --

120 140 -- -- 35.6 -- -- -- -- -- --

121 190 -- -- -- -- -- -- -- -- --

122 130 -- -- -- -- -- -- -- -- --

123 280 -- -- -- -- -- -- -- -- --

124 130 14.0 60.0 28.3 0.980 -- 0.17 270 <5 --

125 210 1.00 19.0 5.70 1.80 -- 0.21 <70 <5 --

126 217 1.10 310 46.0 2.40 -- -- 30 6.00 0.001

127 32.5 3.44 11.5 4.21 0.740 -- 0.095 242 55.2 --

128 150 1.80 98.8 25.3 1.50 -- 1.33 290 <5 --

129 143 1.69 113 35.7 1.30 -- 1.72 <70 <5 --

130 180 3.30 660 49.0 2.50 -- <0.29 <70 220 --

131 140 4.80 570 55.0 2.70 -- <0.29 6,000 270 --

132 85.8 3.10 50.0 8.00 0.800 -- 1.63 40 <5 0.001
132 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

133 35.6 3.34 17.9 3.55 0.640 -- 0.52 332 <5 --

134 479 1.40 257 64.9 3.20 -- 0.75 <70 234 --

135 47.0 -- -- -- -- -- -- -- -- --

138 -- -- -- -- -- -- -- -- -- --

142 -- -- -- -- -- -- -- -- -- --

143 56.0 4.10 88.0 15.0 0.470 -- 0.54 -- -- --

144 68.0 5.40 58.0 4.61 0.530 -- 0.32 -- -- --

145 45.5 3.90 120 18.0 0.400 -- -- -- <5 --

146 60.0 2.60 100 5.00 0.220 <0.1 0.12 <70 <10 --

147 620 2.90 18,000 50.0 0.660 -- <0.29 <70 150 --

148 340 4.90 1,600 12.0 0.400 -- <0.29 640 48.0 --

149 33.0 2.70 73.0 4.30 0.260 -- 0.059 <70 <5 --

150 36.0 3.40 96.0 5.40 0.280 -- 0.084 <70 <5 --

151 140 5.10 960 36.0 0.310 -- 0.013 <70 <5 --

152 190 7.80 496 21.4 <0.5 -- 3.03 -- -- --

153 354 3.20 880 130 1.10 -- -- -- -- --

154 -- -- -- -- -- -- -- -- -- --

155 170 3.60 220 4.80 0.420 -- 0.88 -- -- --

157 116 3.90 172 9.00 0.400 -- -- -- -- --

158 150 3.17 106 5.71 0.353 0.049 6.73 16 35.0 --

159 105 3.40 180 9.59 0.378 0.094 3.03 5.6 <0.2 --

161 170 0.800 70.0 14.0 3.80 -- 0.11 -- -- --

162 305 0.548 302 43.4 2.37 0.36 0.20 3.0 8.79 --

163 538 1.70 748 70.9 2.52 0.79 0.17 39 12.4 --

164 395 1.53 176 126 4.07 0.90 <0.038 92 73.5 --

165 164 1.64 140 24.4 1.96 0.19 0.25 9.2 <0.2 --

166 365 1.30 430 29.0 2.30 -- -- -- <5 --

167 224 2.40 600 47.0 1.00 -- -- -- 56.0 --

168 138 1.70 29.7 99.9 0.900 -- -- -- -- --

169 -- -- -- -- -- -- -- -- -- --

169 125 0.400 75.4 22.4 -- -- -- -- -- --

170 510 6.10 910 210 0.270 -- 0.25 -- -- --

171 443 3.00 740 460 1.10 -- -- -- -- --

172 340 6.60 600 69.0 1.10 -- 0.099 -- -- --

173 1,300 3.20 2,600 91.0 0.990 -- 0.077 -- -- --

174 279 1.20 140 79.0 1.40 -- <0.29 -- -- --

175 170 3.70 1,000 18.0 0.670 -- 0.59 -- -- --

176 144 0.800 94.2 7.50 0.900 -- -- -- -- --

177 829 3.60 1,490 172 4.00 -- -- -- -- --

178 980 3.50 2,600 98.0 3.90 -- 7.23 -- -- --

179 408 3.10 538 85.0 1.30 -- -- -- -- --

180 520 1.60 470 170 0.900 -- <0.29 -- -- --

181 1,700 4.40 2,700 110 1.00 -- 0.32 -- -- --

182 390 0.700 116 143 -- -- -- -- -- --

182 -- -- -- -- -- -- -- -- -- --

183 289 5.60 1,530 130 0.400 -- -- -- -- --

184 -- -- -- -- -- -- -- -- -- --

185 387 3.00 225 82.4 0.900 -- -- -- -- --

186 69.7 3.70 28.6 8.80 0.300 -- -- -- -- --

187 230 0.610 23.3 171 10.4 -- 0.023 -- -- --

187 -- -- -- -- -- -- -- -- -- --

188 300 0.570 77.3 16.0 0.780 -- 0.28 -- -- --

189 316 1.00 170 110 -- -- -- -- -- --

189 -- -- -- -- -- -- -- -- -- --

191 920 1.80 2,100 110 1.60 -- 0.029 -- -- --

192 89.0 8.10 197 6.80 -- -- -- -- -- --

193 200 1.70 550 16.0 1.10 -- 0.56 -- -- --

194 130 0.790 120 13.0 0.890 -- 0.25 -- -- --

195 620 1.50 64.6 873 -- -- -- -- -- --

196 760 4.70 1,200 110 1.00 -- 0.17 -- -- --

197 706 3.70 1,100 170 -- -- -- -- -- --

198 667 2.00 1,310 128 1.30 -- -- -- -- --

199 324 17.0 2,500 125 <0.5 -- -- -- -- --
Appendix 133

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

200 340 2.40 390 48.0 1.40 -- 0.099 -- -- --

201 -- -- -- -- -- -- -- -- -- --

201 122 0.700 71.6 10.6 -- -- -- -- -- --

202 190 2.60 660 34.0 0.810 -- 0.16 -- -- --

203 492 1.50 479 111 1.50 -- -- -- -- --

203 -- -- -- -- -- -- -- -- -- --

204 940 3.80 1,000 260 0.860 -- 7.45 -- -- --

205 356 1.00 116 231 2.00 -- -- -- -- --

205 -- -- -- -- -- -- -- -- -- --

206 275 0.700 240 30.0 1.90 <0.1 0.14 -- -- --

207 -- -- -- -- -- -- -- -- -- --

208 200 1.50 229 12.6 -- -- 1.93 -- -- --

209 250 3.70 -- 32.0 0.360 -- 6.00 -- -- --

211 110 1.80 130 29.0 0.220 -- 23.00 -- -- --

213 57.0 0.960 14.0 7.60 -- -- <0.29 -- -- --

214 783 1.31 96.2 1,280 3.50 -- <0.29 -- -- --

214 -- -- -- -- -- -- -- -- -- --

215 757 1.80 <5 1,160 1.70 -- <0.29 -- -- --

216 909 2.10 40.0 1,790 -- -- -- -- -- --

216 -- -- -- -- -- -- -- -- -- --

217 81.5 1.40 160 49.0 1.20 -- 0.12 -- -- --

218 190 1.20 20.0 115 2.90 -- 0.009 -- -- --

219 162 3.50 300 70.0 <0.5 -- -- -- -- --

220 438 1.70 265 277 3.50 -- -- -- -- --

221 690 2.20 1,300 150 1.00 -- 0.027 -- -- --

222 451 2.60 468 389 2.30 -- -- -- -- --

223 -- -- -- -- -- -- -- -- -- --

224 170 2.48 638 77.5 0.710 -- <0.29 <70 364 --

225 340 3.60 383 46.7 1.50 -- 1.86 490 <5 --

226 450 1.30 6.00 560 6.00 -- <0.29 <70 280 --

227 1,000 5.40 1,600 400 1.20 -- 0.43 -- -- --

228 291 0.800 55.9 203 6.70 -- -- -- -- --

228 -- -- -- -- -- -- -- -- -- --

229 400 4.40 1,000 35.0 1.60 -- -- -- -- --

230 289 4.23 578 157 0.840 -- 0.38 <70 <5 --

231 160 3.30 123 4.50 -- -- -- <70 <5 --

232 420 1.80 87.0 187 2.20 -- 0.42 <70 <5 --

233 69.0 2.40 130 6.60 0.340 -- 0.41 <70 <5 --

234 330 8.50 1,380 25.8 -- -- -- 310 150 --

235 -- -- -- -- -- -- -- -- -- --

236 480 160 600 136 2.30 -- 0.50 -- -- --

237 213 4.10 80.0 117 1.10 -- -- 20 <5 0.001

238 365 6.67 220 154 5.50 -- <0.29 <70 35.3 --

239 74.0 3.90 120 3.70 0.240 -- 0.072 71 12.0 --

240 215 0.800 130 65.0 1.30 -- -- 180 <5 0.004

241 78.3 0.800 90.0 11.0 0.500 -- 0.39 -- <5 --

242 144 0.600 90.0 24.0 1.10 -- <0.29 -- 493 --

243 122 3.60 200 9.00 0.400 -- -- -- <5 --

244 149 3.00 110 24.0 0.500 <0.1 0.032 -- -- --

245 59.5 0.900 20.0 14.0 0.900 -- -- -- 31.0 --

246 219 1.68 687 49.9 1.00 -- 2.18 <70 6.10 --

247 170 2.60 74.0 15.0 1.00 -- 0.027 <70 13.0 <1

248 745 1.80 1,040 140 1.70 -- -- -- -- --

249 717 1.50 1,510 130 1.70 2.00 -- -- -- --

250 340 5.00 830 290 0.510 -- 3.39 -- -- --

251 578 3.20 820 190 2.00 -- -- -- -- --

252 349 3.20 204 73.5 2.30 -- -- -- -- --

253 576 1.90 750 80.0 2.70 -- -- -- -- --

254 677 1.60 1,080 250 4.20 -- -- -- -- --

255 490 1.20 747 86.5 3.40 -- <0.29 -- 14.0 --

256 330 0.560 77.0 150 5.10 1.10 0.093 -- -- --

256 -- -- -- -- -- -- -- -- -- --

257 500 3.70 660 98.0 1.60 <0.1 <0.29 -- -- --

258 266 1.20 79.1 69.3 3.10 -- -- -- -- --
134 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

259 700 3.00 1,300 73.0 1.50 <0.1 0.075 -- -- --

259 -- -- -- -- -- -- -- -- -- --

260 134 1.60 38.3 28.1 2.50 -- -- -- -- --

261 57.5 1.60 6.10 8.80 0.900 -- -- -- -- --

262 213 4.10 80.0 117 1.10 0.80 1.38 -- -- --

263 378 1.50 <5 321 2.70 1.00 0.009 -- -- --

264 -- -- -- -- -- -- -- -- -- --

264 145 2.80 101 12.0 0.500 -- -- -- -- --

265 319 1.50 160 26.0 1.00 0.20 <0.29 -- -- --

266 238 0.500 60.0 260 9.50 2.00 0.23 -- -- --

267 218 3.81 1,110 20.2 0.660 -- 2.06 <70 5.97 --

268 220 1.80 430 15.0 0.930 -- -- <70 11.0 <1

269 1,500 3.10 1,720 151 -- -- -- 730 19.0 --

270 1,300 3.10 -- 97.0 4.00 -- 4.74 <70 <5 --

271 920 3.60 1,900 100 3.00 -- 5.42 <70 <5 --

272 -- -- 720 99.0 -- -- -- -- -- --

273 250 0.810 80.0 97.0 3.50 <0.1 0.084 <70 <10 <20

274 250 2.30 77.2 131 4.90 0.70 0.36 5,800 450 --

275 270 4.20 140 78.0 2.60 <0.1 0.27 <70 800 --

276 520 1.60 830 62.0 1.20 <0.1 <0.29 <70 22.0 --

277 633 1.53 911 263 3.30 2.40 2.01 <70 27.5 --

278 312 2.17 459 65.5 1.80 0.80 0.59 <70 <5 --

279 756 4.64 1,380 287 1.20 3.14 2.78 <70 <5 --

280 439 1.07 514 173 1.20 1.10 <0.29 <70 5.93 --

281 490 2.40 168 47.4 2.80 0.30 0.67 <70 <10 --

282 510 1.30 299 492 2.20 2.76 <0.29 <70 113 --

283 300 1.00 11.0 390 8.00 1.80 <0.29 -- 14.0 --

284 170 0.950 -- -- -- -- 0.063 <70 <10 --

285 320 0.660 320 29.0 1.70 <0.1 <0.29 <70 11.0 <20

286 374 0.644 316 111 4.00 0.69 3.73 <70 <5 --

287 560 1.50 600 380 2.50 3.80 0.036 <70 <10 --

288 170 0.800 70.0 14.0 3.80 -- -- 40 24.0 0.003

289 110 2.40 190 5.90 0.330 -- 0.086 <70 130 --

290 220 11.0 300 38.0 0.430 -- 0.27 290 <5 --

291 80.0 1.80 157 20.3 0.590 -- 2.35 820 <5 --

292 100 3.20 172 16.7 <0.5 -- 1.31 5,800 86.0 --

293 140 6.70 378 61.4 0.540 -- 4.86 110,000 980 --

294 130 2.60 170 23.0 0.420 -- 0.50 <70 <5 --

295 230 4.20 624 86.1 0.920 -- 18.09 1,500 31.0 --

296 47.4 1.20 50.0 6.00 0.800 -- -- <70 <5 <1

297 238 0.700 70.0 45.0 2.60 -- -- <70 <5 0.004

298 149 3.00 110 24.0 0.500 -- -- <70 191 0.001

299 340 2.60 560 97.0 1.00 -- <0.29 <70 1,600 --

300 660 1.30 190 663 4.60 2.75 <0.29 220 73.0 --

301 640 1.30 189 661 4.70 2.74 <0.29 210 69.0 --

302 -- -- -- 6.90 -- -- -- -- -- --

303 320 2.00 310 180 3.90 -- 2.10 2,000 20.0 --

304 990 -- 2,700 150 1.20 1.50 0.79 <70 130 --

305 550 2.30 870 -- 0.730 <0.1 <0.29 <70 14.0 --

306 340 1.00 260 -- 2.80 <0.1 <0.29 <70 48.0 --

307 388 1.10 196 348 5.40 -- <0.29 <70 51.8 --

308 250 0.810 80.0 97.0 3.50 -- 0.084 <70 <5 <1

309 400 1.40 200 150 1.30 -- 0.54 <70 <5 --

310 610 1.70 <2.5 1,000 4.70 6.00 <0.29 <70 54.0 --

311 240 0.580 77.0 100 1.50 -- <0.29 110 18.0 --

312 170 5.80 130 5.00 0.330 -- 0.27 <70 280 --

313 940 5.50 820 750 1.10 -- 0.047 1,600 53.0 --

314 520 3.60 930 810 0.990 -- 0.99 260 <5 --

315 95.0 11.0 142 9.90 -- -- -- 14,000 74.0 --

316 930 1.90 <2.5 1,560 2.40 4.00 <0.29 300 200 --

317 490 2.70 530 110 1.10 -- <0.29 160 16.0 --

318 130 0.810 110 42.6 1.10 -- 0.10 840 30.0 --

319 220 2.40 -- -- -- -- 0.32 <70 42.0 --

320 91.0 2.05 58.0 11.1 1.80 -- 0.25 <70 <5 --
Appendix 135

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

321 480 1.40 452 127 2.30 -- 3.34 220 14.0 --

322 360 1.40 420 56.0 1.60 <0.1 0.20 <70 <10 --

323 348 1.30 150 195 1.20 -- 6.37 <70 13.0 0.002

324 758 3.25 1,070 293 0.910 -- 16.85 <70 <5 --

325 380 0.750 44.0 500 4.40 -- <0.29 160 45.0 --

326 350 0.910 180 170 2.60 -- 0.86 300 20.0 --

327 510 1.70 20.0 790 3.90 5.60 0.41 <70 <10 --

328 200 1.30 240 9.70 1.40 <0.1 0.32 <70 <10 <20

329 380 1.40 150 280 2.10 -- 0.25 130 25.0 --

330 191 2.40 130 12.0 1.00 -- -- <70 <5 0.001

331 378 1.50 <2.5 321 2.70 -- 0.040 <70 37.0 0.002

332 1,100 3.09 2,670 92.7 1.50 1.13 1.01 <70 59.1 --

333 290 0.590 -- -- -- -- <0.29 <70 43.0 <20

334 702 1.96 1,350 154 1.50 -- <0.29 <70 136 --

335 120 0.600 64.0 17.0 1.00 -- <0.29 <70 260 --

336 110 0.500 64.0 17.0 0.920 -- <0.29 <70 210 --

337 277 0.600 200 214 4.50 -- 0.64 20 10.0 0.004

338 757 1.80 <2.5 1,160 1.70 -- <0.29 150 90.0 0.003

339 244 5.43 1,520 114 0.490 -- 0.39 <70 25.0 --

340 468 2.20 730 158 1.40 -- <0.29 160 404 0.002

341 2,100 4.40 160 3,500 1.90 -- -- 260 27.0 --

342 200 1.50 140 18.0 -- -- -- 110 -- --

343 300 1.60 140 24.0 1.80 -- -- -- -- --

344 304 0.975 246 132 5.40 -- <0.29 <70 16.9 --

345 -- -- -- -- -- -- -- -- -- --

346 1,300 4.08 2,890 115 1.80 -- 1.56 <70 6.61 --

347 232 0.500 80.0 20.0 1.20 -- <0.29 70 155 0.002

348 160 2.20 760 28.0 0.510 -- -- 470 510 --

349 210 2.20 30.0 14.0 1.60 -- -- 30 <5 0.001

350 190 1.60 40.0 25.0 1.40 -- -- <70 <5 0.002

351 1,400 6.70 3,200 84.0 0.860 -- 0.13 -- -- --

352 410 1.30 190 210 1.70 -- 0.79 <70 28.0 --

353 560 2.00 981 52.7 1.20 -- 0.066 2,100 460 --

354 160 2.40 630 28.0 0.210 -- <0.29 110 330 <1

355 280 3.10 980 210 0.260 -- 0.034 <70 1,000 <1

356 540 1.10 245 101 1.60 -- 7.59 <70 <5 --

357 350 3.00 899 113 0.910 -- 0.17 1,400 300 --

358 400 2.90 1,300 89.0 0.800 -- <0.29 2,500 360 --

359 530 1.80 780 89.0 2.00 -- 0.41 <70 36.0 --

360 -- -- -- -- -- -- -- -- -- --

361 211 0.411 17.6 135 11.0 -- <0.29 <70 10.4 --

362 390 0.470 186 174 4.10 -- 0.099 <70 190 --

363 660 1.60 101 1,030 4.00 -- <0.29 440 170 --

364 783 1.31 96.2 1,280 3.50 -- <0.29 <70 79.8 --

365 650 1.35 882 137 1.90 -- 0.70 <70 41.6 --

366 170 2.80 91.6 12.6 0.650 -- 0.99 2,100 31.0 --

367 433 1.80 <2.5 590 4.20 -- <0.29 30 51.0 0.009

368 319 1.50 160 26.0 1.00 -- <0.29 <70 <5 0.001

369 190 7.90 420 20.0 0.350 -- 0.38 <70 64.0 <1

370 110 3.00 101 12.0 1.10 -- 0.18 <70 <5 --

371 106 3.00 110 16.0 0.900 -- -- <70 10.0 0.001

372 430 1.80 689 48.3 2.50 -- 2.89 840 22.0 --

373 300 0.570 77.3 16.0 0.780 -- 0.28 370 110 --

374 68.0 1.30 77.0 20.0 0.610 -- 0.38 <70 <5 --

375 238 0.500 60.0 260 9.50 -- 1.04 130 20.0 0.009

376 -- -- -- -- -- -- -- -- -- --

377 629 2.69 842 172 2.40 -- <0.29 <70 19.5 --

378 620 1.50 64.6 873 -- -- -- 220 <5 --

379 1,600 6.70 130 3,100 <0.5 -- <0.29 800 40.0 --

380 360 1.10 320 81.0 2.60 -- 0.77 <70 <5 --

381 690 4.50 1,290 151 2.60 -- 0.74 270 <5 --

382 470 2.80 450 26.0 0.950 -- -- 130 72.0 --

383 583 4.72 884 181 1.30 -- 0.68 <70 <5 --
136 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

384 260 1.70 236 82.9 2.40 -- 0.070 <70 38.0 --

385 110 2.60 200 10.0 0.360 -- <0.29 <70 <5 --

386 1,100 4.40 1,200 220 0.580 -- 9.04 520 8,900 --

387 520 2.30 17.0 820 2.90 -- <0.29 4,000 51.0 --

388 190 1.20 20.0 115 2.90 -- -- 20 16.0 0.004

389 -- 0.920 17.0 24.0 1.30 -- <0.29 <70 <5 --

390 99.0 1.00 19.0 20.0 1.40 -- -- <70 <5 --

391 131 1.23 154 9.40 2.70 -- 0.19 <70 <5 --

392 1,300 4.08 2,890 115 1.80 -- 1.56 <70 6.61 --

393 280 6.30 1,500 94.0 0.410 -- 0.11 <70 140 --

394 460 1.44 292 98.3 2.30 -- 23.72 <70 8.76 --

395 834 1.85 1,780 118 0.440 -- 0.33 <70 7.19 --

396 762 1.90 1,480 114 1.90 -- 0.034 60 50.0 --

397 110 3.30 160 6.00 0.370 -- 0.38 67 39.0 --

398 88.0 8.00 203 6.50 0.430 -- 1.59 2,100 100 --

399 160 3.00 110 4.10 0.370 -- 0.59 200 -- --

400 160 3.20 130 16.0 -- -- 0.38 520 94.0 --

401 273 0.639 70.4 136 6.70 -- <0.29 <70 11.0 --

402 444 1.07 654 84.9 3.00 -- <0.29 <70 12.5 --

403 275 0.700 240 30.0 1.90 -- -- <70 <5 0.002

404 279 1.20 140 79.0 1.40 -- <0.29 30 72.0 0.001

405 84.5 1.20 40.0 15.0 0.700 -- -- 170 <5 0.001

406 334 1.03 230 55.0 3.70 -- <0.29 <70 5.23 --

407 329 1.30 150 30.0 1.80 -- <0.29 40 28.0 0.002

408 -- -- -- -- -- -- -- -- -- --

409 540 1.80 1,200 15.0 0.600 -- -- 310 80.0 --

410 -- -- -- -- -- -- -- -- -- --

414 100 3.00 190 19.0 1.00 -- -- 30 <10 --

415 84.0 2.90 170 19.0 1.00 -- -- <10 <10 2.00

416 120 3.50 260 22.0 1.20 -- -- <10 <10 3.00

417 -- -- -- -- -- -- -- -- -- --

418 -- -- -- -- -- -- -- -- -- --

419 450 0.600 23.0 13.0 11.0 -- -- 50 8.00 60.0

420 9.60 9.50 20.0 3.30 0.200 -- -- 70 40.0 --

428 120 3.40 150 39.0 0.360 -- 0.56 -- -- --

429 14.9 2.30 1,110 <1 0.300 -- -- -- <5 --

430 10.0 <0.5 29.0 3.00 <0.5 -- -- -- -- --

432 162 0.600 260 13.0 1.30 -- <0.29 -- 30.0 --

433 30.7 5.50 50.0 13.0 0.200 -- -- -- <5 --

434 61.0 5.10 62.0 11.0 0.340 -- 0.16 -- -- --

435 110 1.70 90.0 12.0 1.00 -- 0.50 -- -- --

436 630 3.10 1,200 140 0.840 -- 0.043 -- -- --

437 33.0 1.50 80.0 13.0 <0.1 -- 1.60 -- -- --

438 8.10 1.30 90.0 3.00 0.100 -- -- -- <5 --

439 180 3.10 210 115 1.30 -- 0.83 -- -- --

440 -- -- -- -- -- -- -- -- -- --

441 270 <0.5 130 70.0 3.40 <0.1 <0.29 -- -- --

442 546 8.20 2,310 200 0.700 -- -- -- -- --

443 230 3.90 390 29.0 1.00 0.21 -- -- -- --

444 330 3.20 190 30.0 0.360 -- 0.23 -- -- --

445 380 1.30 508 31.8 3.10 -- 0.10 -- -- --

446 15.0 <0.5 51.0 <1 <0.5 -- <0.29 -- -- --

447 18.0 <0.5 49.0 <1 <0.5 -- <0.29 -- -- --

447 -- -- -- -- -- -- -- -- -- --

448 9.60 <0.5 25.0 <1 <0.5 -- <0.29 -- -- --

448 -- -- -- -- -- -- -- -- -- --

449 380 <0.5 430 25.0 2.50 <0.1 -- -- -- --

450 57.0 <0.5 74.0 3.80 0.590 <0.1 <0.29 -- -- --

451 29.0 <0.5 51.0 7.80 0.650 <0.1 -- -- -- --

452 200 <0.5 110 9.50 1.40 <0.1 -- -- -- --

453 120 <0.5 130 26.0 1.20 <0.1 -- -- -- --

453 -- -- -- -- -- -- -- -- -- --

454 210 <0.5 150 19.0 1.70 <0.1 <0.29 -- -- --
Appendix 137

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

454 -- -- -- -- -- -- -- -- -- --

455 191 2.10 48.1 1.20 -- -- 0.18 -- -- --

456 15.0 2.80 58.0 3.70 -- -- <0.01 -- -- --

457 -- -- -- -- -- -- -- -- -- --

458 -- -- -- -- -- -- -- -- -- --

459 -- -- -- -- -- -- -- -- -- --

460 28.0 2.80 16.3 11.5 <0.5 -- 0.42 -- -- --

461 -- -- -- -- -- -- -- -- -- --

462 57.5 3.40 64.0 43.9 0.400 -- -- -- -- --

463 46.0 3.80 34.2 14.4 0.430 -- 1.13 -- -- --

464 21.0 2.70 15.7 11.4 <0.5 -- 1.56 -- -- --

465 4,000 590 99.0 4,500 2.30 15.00 -- 3,000 40.0 160

466 22.6 3.30 20.0 <1 0.300 -- -- -- <5 --

468 -- -- -- -- -- -- -- -- -- --

469 45.0 3.10 20.8 12.1 <0.5 -- 2.28 -- -- --

470 29.0 4.00 13.0 7.30 0.360 -- 0.045 -- -- --

471 82.0 4.30 43.5 12.3 <0.5 -- 0.54 -- -- --

472 28.0 2.80 15.0 9.10 0.360 -- 0.23 -- -- --

473 -- 3.00 20.5 12.0 -- -- -- -- -- --

474 -- 3.40 34.4 14.9 -- -- -- -- -- --

475 -- 2.80 14.7 4.70 -- -- -- -- -- --

476 70.4 5.10 32.6 12.9 0.200 -- -- -- -- --

477 150 0.720 24.0 4.50 0.390 -- -- -- -- --

478 90.0 2.50 54.4 9.30 <0.5 -- 0.32 -- -- --

479 -- -- -- -- -- -- -- -- -- --

480 -- -- -- -- -- -- -- -- -- --

481 26.0 2.80 16.3 10.4 <0.5 -- 2.01 -- -- --

482 29.0 3.00 15.5 8.58 <0.5 -- 1.59 -- -- --

483 27.0 2.80 15.1 7.33 <0.5 -- 0.77 -- -- --

484 -- -- -- -- -- -- -- -- -- --

485 25.0 3.00 14.0 9.00 0.410 -- 0.11 -- -- --

486 66.0 3.70 24.0 20.5 <0.5 -- 2.91 <70 <5 --

487 18.0 2.60 13.0 7.30 0.250 -- -- 550 <5 --

488 66.6 5.80 210 21.0 0.300 -- -- -- <5 --

489 -- -- -- -- -- -- -- -- -- --

490 -- -- -- -- -- -- -- -- -- --

491 57.0 4.60 30.7 21.4 0.430 -- 4.80 -- 10.0 --

492 81.0 3.90 66.0 62.0 0.260 -- -- -- -- --

493 146 2.90 72.7 110 0.400 -- -- -- -- --

494 130 1.60 24.3 22.0 1.70 -- 0.052 -- -- --

495 110 4.90 92.8 119 0.750 -- 2.46 -- -- --

496 64.0 2.90 29.7 7.56 <0.5 -- <0.29 -- -- --

497 24.0 2.70 15.7 11.6 <0.5 -- 1.40 -- -- --

498 35.0 2.50 14.3 7.71 0.440 -- 0.52 -- -- --

499 69.0 2.40 20.4 7.08 0.460 -- 0.13 -- -- --

500 64.0 2.50 67.2 8.50 <0.5 -- 0.41 -- -- --

501 100 7.40 240 <1 0.580 -- 0.72 -- -- --

502 26.1 10.0 48.0 6.50 0.570 <0.1 0.40 -- -- --

503 -- -- 56.0 16.0 <0.5 <0.1 0.14 -- -- --

504 130 2.60 64.0 92.0 0.400 <0.1 0.68 <70 <10 <20

505 28.0 4.10 14.0 8.50 0.140 <0.1 0.081 <70 <10 <20

506 26.0 2.80 16.3 10.4 <0.5 -- 2.01 <70 <5 --

507 19.0 2.20 14.0 10.0 0.240 -- 0.14 -- -- --

508 28.0 3.30 17.0 15.0 0.370 -- 0.50 -- -- --

509 1,600 5.50 260 2,800 0.360 -- -- 61 -- --

510 1,600 5.30 250 2,400 0.670 -- 0.38 <70 10.0 --

511 29.0 3.00 15.5 8.58 <0.5 -- 1.59 250 <5 --

512 67.0 5.80 31.0 10.0 0.360 -- 0.63 120 18.0 --

513 28.0 2.80 13.0 4.70 0.250 -- 0.029 <70 <5 --

514 34.0 3.10 26.0 22.4 <0.4 -- 3.46 260 18.0 --

515 130 0.930 24.0 5.60 0.350 -- <0.29 <70 <5 <1

516 90.0 2.50 54.4 9.30 <0.5 -- 0.32 <70 <5 --

517 54.0 3.70 38.0 19.0 0.410 -- 0.54 -- -- --

518 21.0 2.90 17.0 15.0 0.220 -- 0.14 <70 <5 <1

519 25.0 3.20 14.0 10.0 0.200 -- 0.13 <70 <5 <1
138 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

520 52.0 4.00 22.0 170 0.130 -- 0.50 <70 <5 <1

521 86.0 5.30 34.0 10.0 0.320 -- 1.06 <70 10.0 --

522 54.0 3.30 27.0 14.0 0.320 -- 0.68 390 16.0 --

523 70.0 4.80 150 6.50 0.360 -- 0.79 <70 <5 --

524 20.0 2.80 14.0 11.0 0.330 -- 0.21 84 <5 --

525 82.0 4.30 43.5 12.3 <0.5 -- 0.54 220 33.0 --

526 -- -- -- -- -- -- -- -- -- --

527 26.0 2.80 14.0 12.0 0.240 -- 0.21 <70 <5 <1

528 64.0 2.90 29.7 7.56 <0.5 -- <0.29 290 20.0 --

529 72.0 2.60 43.0 40.0 0.270 -- <0.29 <70 <5 <1

530 284 8.70 2,280 115 1.80 -- 1.79 <70 942 --

531 39.0 3.00 20.5 12.0 -- -- -- <70 <5 --

532 53.0 4.50 30.0 17.3 <0.5 -- 0.32 250 25.0 --

533 22.0 2.80 14.0 7.80 0.340 -- 0.20 -- -- --

534 50.0 5.80 210 3.80 0.320 -- 0.68 3,500 120 --

535 60.0 6.00 190 7.90 0.460 -- 0.59 <70 88.0 --

536 22.0 2.40 15.0 7.40 0.150 -- 0.084 <70 <5 <1

537 30.0 2.50 14.0 8.60 0.290 -- 0.21 <70 <5 --

538 54.0 3.40 34.4 14.9 -- -- -- <70 <5 --

539 68.0 2.60 19.0 6.90 0.270 -- 0.063 <70 11.0 <1

540 28.0 3.40 16.0 31.0 0.260 -- 0.68 <70 <5 --

541 71.0 5.60 27.0 22.0 0.420 -- 1.06 -- -- --

542 64.0 2.50 67.2 8.50 <0.5 -- 0.41 <70 <5 --

543 28.0 2.90 20.0 13.0 0.210 -- 0.22 <70 <5 <1

544 -- -- -- -- -- -- -- -- -- --

558 -- -- -- -- -- -- -- -- -- --

559 230 4.10 720 17.0 1.30 -- -- 2,400 440 1.00

560 -- -- -- -- -- -- -- -- -- --

561 -- -- -- -- -- -- -- -- -- --

562 25.0 2.20 877 353 <0.5 -- 0.24 -- <5 --

563 73.9 2.80 160 11.0 0.800 -- -- -- <5 --

564 -- -- -- -- -- -- -- -- -- --

565 -- -- -- -- -- -- -- -- -- --

566 -- -- -- -- -- -- -- -- -- --

569 -- -- -- -- -- -- -- -- -- --

570 194 4.90 700 17.0 1.00 -- -- -- 206 --

571 178 4.20 590 19.0 1.10 -- -- -- 331 --

572 81.2 3.40 150 11.0 1.10 -- -- -- <5 --

573 44.0 2.20 10.0 2.00 0.400 -- -- -- <5 --

574 -- -- -- -- -- -- -- -- -- --

575 170 2.80 280 230 0.400 -- <0.29 <70 69.0 --

576 159 6.30 620 49.0 0.400 -- -- -- <5 --

577 48.8 3.10 110 8.00 0.300 -- -- -- <5 --

578 68.4 4.30 20.0 3.00 0.400 -- -- -- <5 --

579 34.0 2.50 27.0 3.90 0.220 -- 0.20 640 <5 --

580 470 4.50 1,340 60.0 0.600 -- -- -- <10 --

581 120 2.10 200 4.80 0.240 -- 0.23 -- -- --

582 180 3.00 470 13.0 0.240 -- 0.32 -- -- --

583 200 4.00 930 58.0 0.290 -- 3.84 -- -- --

584 130 3.00 540 34.0 0.290 -- 2.03 -- -- --

585 180 4.20 470 24.0 0.460 -- 0.12 -- -- --

586 61.0 2.70 120 9.10 0.260 -- 0.41 -- -- --

587 150 4.40 640 41.0 0.280 -- 2.48 -- -- --

588 110 3.80 210 15.0 0.360 -- 0.13 -- -- --

589 61.0 3.20 110 8.50 0.260 -- 0.29 -- -- --

590 62.0 3.80 59.0 5.40 0.330 -- 0.32 -- -- --

591 89.0 3.40 49.0 2.70 0.360 -- 0.077 -- -- --

592 95.0 4.50 55.0 3.40 0.400 -- 0.097 -- -- --

593 82.0 4.30 95.0 2.70 0.320 -- 0.11 -- -- --

594 110 4.80 170 5.10 0.200 -- 0.11 -- -- --

595 110 4.40 190 4.60 0.200 -- 0.11 -- -- --

596 78.0 4.80 40.0 7.50 0.430 -- 0.27 -- -- --

597 45.0 4.40 29.0 7.10 0.190 -- 0.17 -- -- --

598 98.0 4.70 50.0 5.10 0.350 -- 0.23 -- -- --

599 130 6.70 190 20.0 <0.5 0.26 0.38 -- -- --
Appendix 139

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

600 120 5.00 130 10.0 <0.5 <0.1 0.50 -- -- --

601 20.5 5.22 14.0 <1 0.710 0.88 <0.29 170 <10 2.00

602 320 <0.5 390 49.0 0.250 -- 0.38 <70 <5 --

603 38.0 7.40 40.0 4.70 0.200 -- 0.17 <70 <5 <1

604 560 1.60 1,200 45.0 0.990 -- <0.29 <70 31.0 --

605 480 6.60 1,600 76.0 0.520 -- <0.29 <70 150 --

606 480 6.60 1,700 76.0 0.520 -- 0.14 <70 250 --

607 89.0 5.20 190 28.0 0.480 -- 0.56 <70 <5 --

608 990 4.80 2,700 150 1.20 -- 0.79 <70 130 --

609 140 2.80 350 23.0 0.530 -- 0.075 <70 <5 <1

610 44.0 4.20 26.0 3.50 0.280 -- 0.086 <70 <5 --

611 50.0 4.40 26.0 3.70 0.260 -- 0.14 <70 <5 --

612 120 4.60 28.0 1.00 0.220 -- 0.059 <70 <5 --

613 60.0 5.40 12.0 <1 0.510 -- 0.066 <70 <5 --

614 94.0 4.40 47.0 2.20 0.410 -- 0.23 <70 <5 --

615 171 4.90 484 19.7 -- -- 0.060 -- -- --

616 100 6.40 89.5 9.40 0.540 -- 1.70 -- -- --

617 94.0 6.30 97.1 15.0 0.510 -- 1.20 -- -- --

623 166 6.42 713 14.2 0.327 0.12 1.50 11 0.24 --

624 174 4.47 1,595 13.4 0.348 0.079 0.076 4.6 10.1 --

625 110 <0.5 560 18.0 1.00 -- -- -- -- --

626 48.7 2.30 490 10.0 0.400 -- -- -- <5 --

627 567 4.28 860 82.6 1.27 0.10 4.03 <8 0.44 --

628 105 11.8 61.1 10.1 0.670 -- 1.60 -- -- --

629 -- 2.50 24.8 20.7 -- -- -- -- -- --

630 70.0 3.20 36.0 6.50 0.330 -- 0.63 -- -- --

631 -- 3.80 42.7 8.80 -- -- -- -- -- --

632 93.0 2.50 19.0 7.60 0.310 -- 0.12 -- -- --

633 55.0 2.90 18.0 7.60 0.300 -- 0.22 -- -- --

634 61.3 14.3 50.0 15.0 0.200 -- -- -- 5.00 --

635 90.1 12.5 215 26.6 0.650 0.63 3.20 -- -- --

636 85.5 11.8 82.6 13.5 0.570 <0.1 1.90 -- -- --

637 35.8 4.74 54.3 9.70 0.520 <0.1 0.28 -- -- --

638 43.8 5.29 30.6 11.0 0.900 <0.1 1.60 -- -- --

639 108 7.70 80.0 10.0 0.500 -- -- -- <5 --

640 84.0 2.40 20.7 12.0 1.10 -- 0.45 -- -- --

641 33.0 2.60 14.1 6.38 <0.4 -- 0.46 -- -- --

642 88.0 2.40 20.8 8.80 0.450 -- 0.16 -- -- --

643 94.0 2.80 211 21.0 <0.5 -- 3.37 -- -- --

644 23.6 1.28 45.1 6.30 0.340 -- 0.56 -- -- --

645 110 2.20 51.5 8.96 <0.5 -- <0.29 -- -- --

646 91.0 3.40 460 25.0 0.500 -- -- -- -- --

647 740 <0.5 1,000 42.0 1.50 -- <0.29 -- -- --

649 560 5.50 840 240 0.520 -- <0.29 -- -- --

650 89.2 7.79 60.9 10.0 <0.5 -- 1.50 -- <5 <1

651 89.6 7.87 94.8 16.1 <0.5 -- 1.50 -- <5 <1

652 26.0 <0.5 39.9 34.0 0.680 -- 0.95 -- -- --

653 -- -- 11.0 <1 <0.5 -- <0.29 -- -- --

654 160 2.90 220 160 0.380 -- 0.13 -- -- --

655 210 3.30 320 170 0.430 -- 0.20 -- -- --

656 120 4.60 160 130 0.330 -- 0.16 -- -- --

657 320 5.80 360 160 0.350 -- <0.02259 -- -- --

658 540 4.10 770 160 0.390 -- <0.02259 -- -- --

660 71.0 4.00 340 12.0 0.620 <0.1 -- -- -- --

660 -- -- -- -- -- -- -- -- -- --

661 760 11.0 2,400 450 0.250 -- 4.97 -- -- --

662 31.0 <0.5 360 9.50 <0.5 <0.1 -- -- -- --

663 220 8.90 380 17.0 <0.5 <0.1 -- -- -- --

663 -- -- -- -- -- -- -- -- -- --

664 560 4.90 1,100 140 0.450 -- <0.02259 -- -- --

665 69.1 6.09 93.2 15.1 0.450 0.54 1.40 -- -- --

666 95.4 <0.5 52.9 10.0 0.800 <0.1 1.40 -- -- --

667 82.6 13.4 173 21.6 0.580 0.57 3.40 -- -- --

668 76.2 12.9 50.4 10.0 0.730 <0.1 1.50 -- -- --

669 32.0 2.00 340 8.50 0.310 -- 0.15 -- -- --
140 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

670 98.3 <0.5 40.7 9.00 0.780 <0.1 1.30 -- -- --

671 80.3 6.59 72.3 6.60 0.660 <0.1 1.60 -- -- --

672 97.4 6.80 82.3 10.9 0.640 <0.1 1.30 -- -- --

673 63.5 8.27 56.6 7.10 0.560 <0.1 1.40 -- -- --

674 46.0 4.51 138 12.0 0.190 0.53 1.80 -- -- --

675 31.0 1.90 360 8.30 0.320 -- 0.14 -- -- --

676 130 2.40 590 19.0 1.00 -- 0.43 -- -- --

677 100 4.40 71.0 9.60 0.540 <0.1 0.13 7,900 210 --

678 60.0 3.70 19.0 10.0 0.160 -- 0.25 <70 <5 <1

679 34.0 2.10 15.2 6.67 0.420 -- 0.71 <70 74.0 --

680 210 4.00 264 99.2 -- -- -- 210 <5 --

681 30.0 3.10 14.0 7.90 0.160 -- 0.27 <70 <5 <1

682 85.0 3.80 42.7 8.80 -- -- -- 350 <5 --

683 180 10.0 65.0 7.40 0.390 -- 0.17 17,000 530 --

684 84.0 2.40 20.7 12.0 1.10 -- 0.45 <70 <5 --

685 210 1.90 148 18.5 0.480 -- 0.036 <70 <5 --

686 290 1.20 172 11.9 -- -- -- 250 <5 --

687 97.0 3.00 19.0 9.60 0.170 -- 0.17 <70 <5 <1

688 110 2.20 51.5 8.96 <0.5 -- <0.29 <70 42.0 --

689 3,200 11.0 3,600 1,500 2.40 -- 1.08 1,900 15.0 --

690 94.0 2.80 211 21.0 <0.5 -- 3.37 1,500 16.0 --

691 180 0.700 11.0 6.20 4.90 -- -- 40 <10 65.0

692 114 79.0 112 20.0 3.70 -- 0.25 100 10.0 --

693 -- -- -- -- -- -- -- -- -- --

694 44.0 2.60 -- -- <0.5 -- -- -- <5 --

695 68.0 7.00 47.0 5.80 0.650 -- -- -- <5 12.0

696 -- -- 32.2 2.70 0.440 -- <0.29 -- -- --

699 40.0 3.40 -- 12.8 0.550 -- 1.83 -- -- --

704 -- -- -- -- -- -- -- -- -- --

706 23.3 2.70 10.0 2.00 0.400 -- -- -- <5 --

707 54.5 3.80 60.0 11.0 0.400 -- -- -- <5 --

708 24.6 1.80 20.0 6.00 0.500 -- -- -- <5 --

709 71.0 1.90 20.0 2.00 0.300 -- -- -- <5 --

710 -- -- -- -- -- -- -- -- -- --

711 65.5 1.80 20.0 6.00 0.300 -- -- -- <5 --

712 70.0 6.70 107 19.1 0.600 -- -- -- 2.50 --

714 58.0 7.60 124 21.8 <0.5 -- -- -- <5 --

715 35.9 3.80 30.0 5.00 0.200 -- -- -- 6.00 --

716 -- -- -- -- -- -- -- -- -- --

717 -- -- -- -- -- -- -- -- -- --

718 -- -- -- -- -- -- -- -- -- --

719 108 2.40 30.0 1.00 0.500 -- -- -- <5 --

720 99.0 2.30 30.0 <1 0.400 -- -- -- <5 --

721 -- -- -- -- -- -- -- -- -- --

722 -- -- -- -- -- -- -- -- -- --

723 -- -- -- -- -- -- -- -- -- --

724 -- -- -- -- -- -- -- -- -- --

725 -- -- -- -- -- -- -- -- -- --

726 5.90 1.50 6.80 1.10 <0.5 -- <0.29 -- -- --

727 44.1 2.30 30.0 5.00 0.500 -- -- -- <5 --

728 49.4 2.80 40.0 6.00 0.500 -- -- -- <5 --

729 52.4 3.20 50.0 10.0 0.400 -- -- -- <5 --

730 52.9 3.10 40.0 10.0 0.400 -- -- -- <5 --

731 34.4 3.20 20.0 4.00 0.300 -- -- -- <5 --

732 30.0 2.30 20.0 2.00 0.300 -- -- -- <5 --

733 10.7 1.10 <5 <1 0.400 -- -- -- <5 --

734 57.6 2.60 30.0 6.00 0.200 -- -- -- <5 --

735 38.4 1.20 50.0 5.00 0.400 -- -- -- <5 --

736 17.3 1.00 20.0 <1 0.600 -- <0.29 -- <5 --

737 49.1 1.90 30.0 3.00 0.300 -- -- -- <5 --

738 29.5 1.40 50.0 5.00 0.600 -- -- -- <5 --

739 -- -- -- -- -- -- -- -- -- --

740 41.9 1.10 20.0 <1 0.500 -- -- -- <5 --

741 -- -- -- -- -- -- -- -- -- --

742 58.5 1.50 20.0 6.00 0.400 -- -- -- <5 --
Appendix 141

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

743 65.6 1.60 60.0 2.00 0.200 -- -- -- <5 --

744 127 2.20 130 10.0 0.800 -- -- -- 5.00 --

745 146 2.20 50.0 1.00 0.600 -- -- -- <5 --

746 23.2 6.60 10.0 2.00 0.200 -- -- -- <5 --

747 35.0 5.70 30.0 7.00 0.200 -- -- -- <5 --

748 31.1 5.20 30.0 8.00 0.200 -- -- -- <5 --

749 56.9 4.00 50.0 9.00 0.500 -- -- -- <5 --

750 58.6 8.00 70.0 14.0 0.300 -- -- -- 5.00 --

751 51.5 3.80 70.0 13.0 0.300 -- -- -- 5.00 --

752 119 6.90 340 16.0 0.500 -- -- -- 6.00 --

753 48.0 2.60 40.0 6.00 0.400 -- -- -- <5 --

754 31.6 2.70 20.0 4.00 0.400 -- -- -- <5 --

755 76.2 2.10 30.0 3.00 0.300 -- -- -- <5 --

756 -- -- -- -- -- -- -- -- -- --

757 -- -- -- -- -- -- -- -- -- --

758 -- -- -- -- -- -- -- -- -- --

759 -- -- -- -- -- -- -- -- -- --

760 55.9 2.00 40.0 4.00 0.300 -- -- -- <5 --

761 39.6 1.30 20.0 1.00 0.400 -- -- -- <5 --

762 37.4 1.90 50.0 10.0 0.300 -- -- -- <5 --

763 47.8 4.80 50.0 10.0 0.300 -- -- -- <5 --

764 50.6 5.60 60.0 9.00 0.400 -- -- -- <5 --

765 -- -- -- -- -- -- -- -- -- --

766 29.0 <0.5 22.0 4.70 <0.5 -- 0.29 -- -- --

767 51.0 <0.5 30.0 5.10 <0.5 -- 0.23 -- -- --

768 65.0 <0.5 34.0 <1 <0.5 -- 0.21 -- -- --

769 39.0 <0.5 26.0 <1 0.510 -- 0.17 -- -- --

770 25.0 <0.5 16.0 <1 <0.5 -- 0.17 -- -- --

771 77.0 <0.5 18.0 <1 -- -- <0.29 -- -- --

772 34.0 <0.5 19.0 <1 <0.5 -- 0.15 -- -- --

773 68.0 4.40 33.0 7.20 <0.5 -- <0.29 -- -- --

774 130 3.20 49.0 <1 <0.5 -- 0.16 -- -- --

775 42.0 1.20 24.0 1.70 0.540 -- 0.15 <70 <5 --

776 34.0 1.40 20.0 4.20 0.420 -- 0.29 <70 <5 --

777 48.0 2.60 24.0 2.00 0.370 -- 0.16 <70 <5 --

778 33.0 1.90 22.0 5.80 0.460 -- 0.027 <70 <5 --

779 86.0 6.00 129 18.0 0.330 0.24 4.76 <50 <5 <3

780 9.00 <0.5 13.0 <1 0.180 <0.05 0.090 <50 <5 <3

781 40.0 4.00 34.0 6.00 0.320 0.060 1.16 <50 <5 4.00

782 -- 2.00 82.0 30.0 0.300 -- 0.88 <70 <5 <1

783 13.0 3.00 25.0 7.00 1.03 <0.05 1.30 <50 <5 <3

784 23.0 4.00 29.0 6.00 0.350 <0.05 0.95 <50 <5 4.00

785 853 9.00 2,720 263 0.560 0.34 9.42 <50 <5 <3

786 30.0 4.00 31.0 6.00 0.240 <0.05 1.62 <50 <5 5.00

787 27.0 4.30 31.0 4.50 0.110 0.086 -- <100 2.70 2.20

788 42.0 5.00 38.0 5.00 0.360 0.11 0.75 <50 <5 5.00

789 12.0 <0.5 12.0 2.00 0.420 <0.05 0.41 <50 <5 <3

790 42.0 2.80 38.0 14.0 0.320 <0.2 -- <100 <10 5.40

791 44.0 1.30 27.0 1.60 0.550 -- 0.086 <70 <5 --

792 87.0 2.00 24.0 2.20 0.510 -- 0.29 <70 <5 --

793 40.7 3.00 28.1 4.43 0.400 -- 0.33 <70 <5 <1

794 56.0 1.80 30.0 4.80 0.480 -- 0.25 <70 <5 --

795 150 2.50 200 100 0.530 -- 4.97 <70 <5 --

796 75.0 2.30 40.0 2.80 0.250 -- 0.12 780 13.0 --

797 27.0 5.80 16.0 1.20 0.640 -- 0.093 <70 <5 --

798 30.0 1.50 22.0 2.30 0.520 -- 0.070 <70 <5 --

799 22.0 6.80 20.0 3.10 0.180 -- 0.12 <70 <5 <1

800 81.0 2.30 21.9 14.8 -- -- 1.20 -- -- --

801 -- -- -- -- -- -- -- -- -- --

802 410 3.00 860 110 0.860 -- <0.29 -- -- --

803 530 2.90 950 56.0 0.610 -- 0.19 -- -- --

804 367 2.72 568 43.3 0.784 0.49 0.93 <8 1.70 --

805 1,339 5.05 2,882 391 1.30 1.63 0.40 23 220 --

806 739 1.90 1,010 370 2.20 -- -- -- -- --

807 682 1.61 15.7 1,116 3.76 4.75 <0.038 7.5 16.7 --
142 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

811 165 3.46 244 152 0.974 0.12 2.24 4.4 0.18 --

812 159 3.17 354 39.9 0.741 0.14 0.78 13 2.12 --

813 100 2.98 603 4.42 0.680 0.060 0.17 31 2.12 --

814 157 2.90 396 27.6 0.534 0.12 1.14 20 0.88 --

815 360 4.40 420 160 0.710 -- -- -- -- --

816 65.8 2.01 248 31.5 0.512 0.066 1.61 8.4 0.82 --

817 343 1.84 357 23.3 1.01 0.057 0.67 5.1 1.62 --

818 480 5.30 1,100 150 1.30 -- -- -- -- --

819 796 3.44 1,439 87.3 2.44 0.56 13.68 <9 8.90 1.22

820 45.4 5.25 187 9.38 0.686 0.053 0.61 13 0.59 --

821 203 6.20 240 46.0 0.800 -- -- -- <5 --

822 220 5.40 790 35.0 0.380 -- 0.68 -- -- --

823 220 6.00 600 24.0 0.450 -- 0.68 -- -- --

824 250 4.00 1,500 30.0 0.240 -- 0.25 -- -- --

825 330 4.60 2,200 36.0 0.210 -- 0.29 -- -- --

826 650 1.90 1,130 77.7 2.70 -- -- -- -- --

827 570 2.80 740 78.0 1.80 -- 0.86 -- -- --

828 180 <0.5 180 14.0 1.50 <0.1 <0.29 -- -- --

829 87.1 1.40 250 17.0 0.900 -- -- -- <5 --

830 1,300 7.20 1,900 330 <1 1.90 -- -- -- --

831 -- -- -- -- -- -- -- -- -- --

832 430 1.20 310 160 2.90 -- <0.29 -- -- --

833 450 2.30 610 32.0 0.690 -- 0.27 -- -- --

834 509 5.30 750 235 0.300 -- 2.95 -- 5.00 --

835 110 4.80 520 10.0 0.560 <0.1 -- -- -- --

836 460 <0.5 690 78.0 0.950 0.23 -- -- -- --

837 570 4.80 690 210 1.30 0.58 -- -- -- --

838 170 4.10 300 51.0 0.500 <0.1 <0.29 -- -- --

838 -- -- -- -- -- -- -- -- -- --

839 765 2.60 1,400 37.0 1.60 -- -- -- 20.0 --

840 1,600 15.0 2,500 790 <2.5 3.40 <0.29 -- -- --

840 -- -- -- -- -- -- -- -- -- --

841 350 4.70 540 150 0.560 0.40 -- -- -- --

842 220 3.60 370 150 0.600 0.26 -- -- -- --

842 -- -- -- -- -- -- -- -- -- --

843 181 8.80 210 45.0 0.500 -- -- -- <5 --

844 313 5.10 440 80.0 0.800 -- -- -- <5 --

845 150 <0.5 300 19.0 0.660 <0.1 -- -- -- --

846 588 3.50 1,870 214 1.40 -- -- -- -- --

847 761 5.00 1,780 340 0.200 -- -- -- -- --

848 580 2.20 1,100 39.0 1.70 -- 0.043 -- -- --

849 437 2.80 700 37.5 0.700 -- -- -- -- --

850 410 7.00 700 56.0 2.30 -- 0.084 -- -- --

851 85,000 3,500 130 130 0.720 -- 0.18 -- -- --

852 380 0.580 190 120 0.450 -- <0.29 -- -- --

853 170 3.00 190 120 0.510 -- 0.093 -- -- --

854 230 3.40 210 140 0.420 -- 0.036 -- -- --

855 170 <0.5 130 6.30 1.10 -- <0.29 -- -- --

855 -- -- -- -- -- -- -- -- -- --

856 180 <0.5 280 51.0 1.30 -- -- -- -- --

857 340 <0.5 370 22.0 1.10 -- -- -- -- --

858 600 <0.5 600 220 1.30 -- -- -- -- --

859 69.0 <0.5 110 10.0 0.620 -- <0.29 -- -- --

860 1,200 <0.5 1,700 490 1.50 -- -- -- -- --

860 -- -- -- -- -- -- -- -- -- --

861 200 <0.5 470 15.0 0.620 -- -- -- -- --

862 46.0 4.50 170 8.60 0.540 -- -- -- -- --

862 -- -- -- -- -- -- -- -- -- --

863 430 2.60 520 230 2.90 2.90 0.12 -- -- --

864 260 <0.5 530 87.0 1.30 -- -- -- -- --

865 170 3.40 380 32.0 0.540 -- <0.29 -- -- --

866 380 6.10 960 270 <0.5 -- -- -- -- --

866 -- -- -- -- -- -- -- -- -- --

867 230 3.30 460 55.0 0.580 -- -- -- -- --
Appendix 143

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

868 240 <0.5 640 24.0 <0.5 -- -- -- -- --

869 390 4.70 480 150 0.770 -- -- -- -- --

870 340 4.50 750 24.0 0.490 -- <0.02259 -- -- --

871 150 3.40 190 24.0 0.460 -- 0.16 -- -- --

872 1,400 5.50 2,800 410 <0.1 -- 0.052 -- -- --

873 660 2.40 38.0 1,000 3.40 -- <0.02259 -- -- --

874 220 4.00 1,700 36.0 0.410 -- 0.29 -- -- --

875 210 1.80 250 79.0 0.550 -- 0.93 -- -- --

876 470 3.80 1,400 120 0.460 -- <0.02259 -- -- --

877 150 3.90 210 25.0 0.790 -- 0.86 -- -- --

878 130 3.70 170 140 0.450 -- 0.29 -- -- --

879 140 7.70 140 44.0 0.470 -- 0.20 -- -- --

880 370 5.40 890 120 1.20 -- 0.054 -- -- --

881 440 5.20 1,000 180 0.540 -- 0.068 -- -- --

882 300 5.30 700 130 0.610 -- 0.081 -- -- --

883 550 10.0 840 260 1.30 -- 0.25 -- -- --

884 680 6.40 1,300 170 0.920 -- 1.06 -- -- --

885 470 4.40 800 100 0.640 -- 1.33 -- -- --

886 100 5.20 255 13.8 0.720 0.080 0.33 -- -- --

887 460 4.10 770 91.0 0.680 -- 0.63 -- -- --

888 270 6.20 810 83.0 0.520 -- 0.029 -- -- --

889 140 4.20 200 98.0 0.330 -- 0.17 -- -- --

890 500 6.30 850 150 0.260 -- 1.63 -- -- --

891 87.0 5.70 65.0 30.0 0.450 -- 0.14 -- -- --

892 520 6.20 910 150 0.190 -- 1.38 -- -- --

893 470 6.10 840 140 0.240 -- 0.75 -- -- --

894 440 6.10 870 150 0.160 -- 1.38 -- -- --

895 360 5.90 590 180 0.650 -- 0.054 -- -- --

896 290 4.60 420 94.0 0.620 -- 0.099 -- -- --

897 25.0 <0.5 170 9.20 1.00 <0.1 <0.29 -- -- --

898 110 3.30 220 12.0 0.990 <0.1 -- -- -- --

898 -- -- -- -- -- -- -- -- -- --

899 190 <0.5 260 10.0 0.840 <0.1 <0.29 -- -- --

899 -- -- -- -- -- -- -- -- -- --

900 300 4.60 490 110 0.570 -- 0.097 -- -- --

901 480 5.70 870 150 0.160 -- 0.95 -- -- --

902 390 4.90 68.0 150 0.210 -- 1.11 -- -- --

903 170 4.30 350 79.0 0.530 -- 0.090 -- -- --

904 210 4.70 560 93.0 0.560 -- 0.050 -- -- --

905 290 4.10 790 250 0.920 0.61 -- -- -- --

905 -- -- -- -- -- -- -- -- -- --

906 110 6.30 180 11.0 0.830 <0.1 -- -- -- --

907 34.0 5.40 150 9.40 0.550 <0.1 <0.29 -- -- --

907 -- -- -- -- -- -- -- -- -- --

908 1,500 12.0 3,400 370 <1 1.80 -- -- -- --

908 -- -- -- -- -- -- -- -- -- --

909 350 4.40 530 230 0.150 -- 0.025 -- -- --

910 60.0 <0.5 260 38.0 0.540 <0.1 -- -- -- --

911 74.0 <0.5 140 9.40 0.900 <0.1 <0.29 -- -- --

912 310 <0.5 630 160 1.20 0.30 -- -- -- --

913 1,500 6.10 2,700 780 <1 2.50 -- -- -- --

913 -- -- -- -- -- -- -- -- -- --

915 1,400 49.0 1,100 930 2.10 1.50 -- -- -- --

916 400 <0.5 300 170 1.40 0.28 -- -- -- --

916 -- -- -- -- -- -- -- -- -- --

917 270 3.50 320 200 0.200 -- <0.02259 -- -- --

918 200 3.70 600 26.0 0.800 0.21 -- -- -- --

918 -- -- -- -- -- -- -- -- -- --

919 180 4.30 320 67.0 0.540 -- 0.14 -- -- --

920 200 6.70 240 67.0 0.660 -- 0.36 -- -- --

921 230 4.90 220 120 0.590 -- 0.066 -- -- --

922 95.0 3.60 280 7.80 0.600 <0.1 <0.29 -- -- --

923 230 3.40 410 21.0 0.950 <0.1 -- -- -- --

924 150 3.20 370 86.0 0.820 <0.1 <0.29 -- -- --

924 -- -- -- -- -- -- -- -- -- --
144 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

925 180 3.10 360 30.0 0.540 <0.1 -- -- -- --

925 -- -- -- -- -- -- -- -- -- --

926 170 <0.5 280 99.0 0.770 <0.1 -- -- -- --

927 240 3.20 480 120 0.600 -- <0.02259 -- -- --

928 200 3.70 370 79.0 0.800 <0.1 -- -- -- --

928 -- -- -- -- -- -- -- -- -- --

930 150 4.40 210 140 0.410 -- 0.045 -- -- --

931 290 270 350 110 0.330 -- <0.02259 -- -- --

932 270 2.60 260 170 1.00 -- 0.068 -- -- --

933 360 3.80 390 160 0.850 0.25 <0.29 -- -- --

934 310 3.90 330 140 0.740 0.21 <0.29 -- -- --

934 -- -- -- -- -- -- -- -- -- --

935 530 12.0 64.0 180 0.920 -- 0.093 -- -- --

936 260 4.20 180 110 0.240 -- <0.02259 -- -- --

937 320 3.50 330 170 0.600 -- 0.15 -- -- --

938 140 2.80 <5 200 <0.1 -- <0.02259 -- -- --

939 390 3.30 240 370 0.990 -- <0.02259 -- -- --

940 450 3.70 630 190 0.840 -- 0.12 -- -- --

941 360 3.90 35.0 170 0.640 -- 0.17 -- -- --

942 360 3.90 34.0 170 0.640 -- 0.19 -- -- --

943 390 3.90 38.0 160 0.760 -- 0.10 -- -- --

944 390 4.00 620 180 0.730 -- 0.14 -- -- --

945 140 3.20 230 150 0.320 -- <0.02259 -- -- --

946 300 1.00 120 280 2.10 -- <0.02259 -- -- --

947 350 0.500 200 120 0.490 -- 0.023 -- -- --

948 340 4.10 390 160 0.650 -- 0.50 -- -- --

949 480 3.10 42.0 24.0 0.960 -- <0.02259 -- -- --

950 160 2.40 190 110 0.540 -- 0.10 -- -- --

951 370 4.40 480 170 0.700 -- 0.54 -- -- --

952 290 3.20 300 150 0.690 -- 0.086 -- -- --

953 310 3.40 340 140 0.600 -- 0.36 -- -- --

954 240 2.50 230 140 0.400 -- <0.02259 -- -- --

955 160 3.00 210 150 0.490 -- 0.099 -- -- --

956 270 3.70 290 130 0.550 -- 0.38 -- -- --

957 180 2.50 240 120 0.590 -- 0.029 -- -- --

958 170 2.90 200 130 0.520 -- 0.045 -- -- --

959 170 2.50 220 110 0.570 -- 0.12 -- -- --

960 150 3.10 190 130 0.450 -- 0.041 -- -- --

961 240 2.10 220 140 0.600 -- <0.02259 -- -- --

962 160 2.90 180 130 0.490 -- 0.043 -- -- --

963 280 1.90 350 170 0.870 -- <0.02259 -- -- --

964 180 2.90 220 120 0.480 -- 0.12 -- -- --

965 180 2.70 230 150 0.600 -- 0.070 -- -- --

966 160 3.00 190 150 0.470 -- 0.10 -- -- --

967 270 3.30 260 130 0.500 -- 0.27 -- -- --

968 350 4.20 540 170 0.670 -- 0.43 -- -- --

969 190 2.60 250 110 0.740 -- <0.02259 -- -- --

970 580 3.40 770 180 0.670 -- <0.02259 -- -- --

971 220 2.90 260 160 0.640 -- 0.11 -- -- --

972 310 3.70 390 150 0.650 -- 0.054 -- -- --

973 440 4.20 480 180 0.810 -- 0.21 -- -- --

974 140 3.60 260 93.0 0.550 -- 0.29 -- -- --

975 340 0.570 180 110 1.00 -- 0.20 -- -- --

976 140 2.40 170 110 0.800 -- 0.063 -- -- --

977 340 3.80 450 180 0.720 -- <0.02259 -- -- --

978 160 4.70 230 110 0.540 -- 0.36 -- -- --

979 200 2.50 270 91.0 0.790 -- 0.15 -- -- --

980 200 2.90 380 140 0.560 -- 0.17 -- -- --

981 260 2.90 260 140 0.590 -- 0.11 -- -- --

982 160 4.90 300 96.0 0.550 -- 0.32 -- -- --

983 230 3.40 560 150 0.520 -- 0.27 -- -- --

984 150 4.60 270 99.0 0.540 -- 0.29 -- -- --

985 190 4.30 420 71.0 0.590 -- 0.36 -- -- --

986 200 3.30 390 96.0 0.800 -- 0.23 -- -- --

987 100 1.80 170 130 0.590 -- <0.02259 -- -- --
Appendix 145

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

988 140 4.20 280 94.0 0.550 -- 0.25 -- -- --

989 150 2.80 230 110 0.920 -- 0.11 -- -- --

990 110 2.60 160 120 0.880 -- 0.23 -- -- --

991 290 3.80 610 170 0.460 -- 0.059 -- -- --

992 290 3.40 520 170 0.560 -- 0.097 -- -- --

993 350 4.70 550 150 0.520 -- 1.67 -- -- --

994 320 4.10 940 81.0 0.560 -- 0.93 -- -- --

995 210 3.90 260 120 0.530 -- 0.17 -- -- --

996 94.0 2.30 160 130 0.950 -- 0.32 -- -- --

997 250 3.20 280 130 0.620 -- 0.034 -- -- --

998 94.0 2.40 160 130 0.970 -- 0.34 -- -- --

999 200 3.10 260 120 0.450 -- 0.17 -- -- --

1000 340 4.10 660 200 0.490 -- 0.25 -- -- --

1001 140 3.40 220 150 0.610 -- 0.50 -- -- --

1002 170 2.60 230 110 0.470 -- 0.12 -- -- --

1003 410 2.00 1,200 190 0.400 -- 1.13 -- -- --

1004 460 2.30 890 190 0.750 -- 1.08 -- -- --

1005 540 4.50 1,000 240 0.640 -- 1.24 -- -- --

1006 200 2.20 190 180 0.610 -- 0.23 -- -- --

1007 480 2.60 430 140 2.00 -- 0.15 -- -- --

1008 640 4.60 1,900 330 0.160 -- <0.02259 -- -- --

1009 1,600 9.20 2,600 270 0.650 -- 4.74 -- -- --

1010 1,200 8.30 2,000 440 0.520 -- 10.84 -- -- --

1011 2,700 10.0 2,600 1,800 0.220 -- -- -- -- --

1012 190 2.30 430 8.40 0.600 -- 0.14 -- -- --

1013 1,200 6.60 2,000 330 0.420 -- 14.46 -- -- --

1014 1,000 5.40 1,700 270 0.500 -- 2.12 -- -- --

1015 1,500 9.20 2,600 290 0.740 -- 6.33 -- -- --

1016 1,000 6.80 2,500 370 0.710 -- 0.27 -- -- --

1017 1,300 5.80 2,600 380 0.670 -- 1.22 -- -- --

1018 1,900 5.00 3,600 940 0.450 -- 0.36 -- -- --

1019 1,400 9.70 3,300 350 0.540 -- 1.94 -- -- --

1020 1,300 5.50 2,500 430 0.850 -- 3.61 -- -- --

1021 2,400 14.0 3,700 1,300 0.290 -- 29.37 -- -- --

1022 1,800 5.40 3,500 520 0.620 -- 4.07 -- -- --

1023 260 3.30 1,000 22.0 0.650 -- 0.21 -- -- --

1024 770 3.90 1,000 680 0.670 -- 0.95 -- -- --

1025 1,300 2.00 2,600 260 1.20 -- 0.99 -- -- --

1026 160 7.40 160 42.0 0.580 -- 0.18 <70 <5 --

1027 160 7.60 170 43.0 0.560 -- 0.19 <70 <5 --

1028 439 5.70 740 34.0 -- -- 3.20 -- -- --

1029 -- -- -- -- -- -- -- -- -- --

1030 3.60 2.50 120 4.00 0.200 -- -- -- <5 --

1031 4.20 1.90 50.0 5.00 0.400 -- -- -- <5 --

1032 54.1 1.90 110 3.00 0.800 -- -- -- <5 --

1033 18.3 2.80 60.0 2.00 0.300 -- -- -- <5 --

1034 502 31.5 3,729 281 0.476 0.83 1.37 <18 876 <1

1038 230 2.90 740 17.0 1.10 -- -- 2,500 70.0 --

1039 -- -- -- -- -- -- -- -- -- --

1051 11,000 330 590 18,000 1.10 -- -- 520 120 --

1052 -- -- -- -- -- -- -- -- -- --

1053 -- -- -- -- -- -- -- -- -- --

1054 200 0.900 390 6.40 0.200 -- -- 720 20.0 11.0

1055 240 1.20 570 13.0 <0.1 0.030 -- 260 20.0 2.00

1057 240 0.900 300 5.20 1.00 <0.2 -- <10 120 5.00

1058 1,500 3.60 95.0 22.0 24.0 0.10 -- 120 40.0 50.0

1059 2,100 4.30 55.0 32.0 27.0 -- -- 160 20.0 3.00

1062 7,100 12.0 110 1,700 18.0 2.00 -- -- 40.0 150

1064 -- -- -- -- -- -- -- -- -- --

1065 -- -- -- -- -- -- -- -- -- --

1066 -- -- -- -- -- -- -- -- -- --

1067 -- -- -- -- -- -- -- -- -- --

1068 2,300 8.50 180 780 7.10 -- -- 1,100 190 --

1069 2,600 4.10 57.0 270 95.0 -- -- 60 <10 <1

1070 -- -- -- -- -- -- -- -- -- --
146 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1071 250 0.500 130 6.80 2.70 -- <0.08 11 <1 9.00

1073 250 4.30 830 24.0 0.600 0.30 -- 70 <10 5.00

1080 210 0.500 180 9.40 0.400 -- <0.08 80 <1 4.00

1081 14,000 79.0 190 2,400 5.30 3.60 -- 2,600 40.0 29.0

1084 10,000 24.0 360 1,700 32.0 -- -- 9.0 <10 --

1085 66.0 2.90 190 10.0 0.300 0.30 -- 30 130 8.00

1091 1,300 6.80 140 190 13.0 0.30 -- 50 30.0 5.00

1094 1,010 11.0 51.0 2,750 35.0 -- 0.34 -- -- --

1095 1,010 11.0 51.0 2,750 35.0 -- 0.34 -- -- --

1096 650 3.00 360 26.0 1.20 <0.2 -- 200 50.0 5.00

1099 -- -- -- -- -- -- -- -- -- --

1100 420 4.90 750 39.0 0.800 0.20 -- 70 <10 38.0

1101 -- -- -- -- -- -- -- -- -- --

1107 -- -- -- -- -- -- -- -- -- --

1125 -- -- -- -- -- -- -- -- -- --

1130 139 1.00 110 82.2 -- -- 3.90 -- -- --

1141 -- -- -- -- -- -- -- -- -- --

1142 200 0.800 4.20 1.30 11.0 <0.2 -- 110 20.0 6.00

1144 530 4.90 1,900 38.0 0.100 -- 0.020 90 -- --

1146 -- -- -- -- -- -- -- -- -- --

1147 -- -- -- -- -- -- -- -- -- --

1149 -- -- -- -- -- -- -- -- -- --

1153 -- -- -- -- -- -- -- -- -- --

1154 -- -- -- -- -- -- -- -- -- --

1160 210 0.500 390 20.0 0.400 0.060 -- 290 50.0 <1

1164 -- -- -- -- -- -- -- -- -- --

1173 -- -- -- -- -- -- -- -- -- --

1174 2,500 21.0 220 3,000 0.800 -- -- 840 20.0 3.00

1175 58.0 0.700 33.0 7.20 0.400 -- -- 30 5.00 1.00

1176 80.0 1.00 58.0 12.0 -- -- -- -- -- --

1177 56.0 1.00 32.0 12.0 -- -- -- -- -- --

1178 130 0.600 78.0 4.60 <0.1 0.040 -- 30 <10 2.00

1182 230 0.600 43.0 12.0 5.00 0.040 -- 80 70.0 4.00

1185 240 1.70 340 5.20 0.900 0.10 -- 50 80.0 <1

1186 89.0 1.80 140 9.00 0.500 0.070 -- 70 <10 <1

1187 -- -- -- -- -- -- -- -- -- --

1188 120 1.40 290 10.0 0.500 -- 0.28 <10 3.00 1.00

1189 310 1.30 18.0 4.90 18.0 -- -- 60 <10 2.00

1190 190 1.80 300 12.0 2.50 -- <0.03 11 7.00 <1

1191 110 0.900 280 5.40 0.200 -- 1.30 <10 <1 1.00

1192 120 1.70 350 53.0 0.400 -- 11.99 7.0 <1 3.00

1193 210 0.300 46.0 7.90 12.0 -- <0.03 24 7.00 <1

1194 510 1.20 2.30 6.00 15.0 -- <0.08 25 <1 1.00

1195 620 1.20 12.0 15.0 20.0 -- 0.047 90 30.0 <1

1196 140 1.70 440 7.60 0.200 -- 0.47 <10 3.00 <1

1197 210 0.500 130 7.60 7.00 -- -- 20 20.0 42.0

1198 12,000 81.0 300 6,300 29.0 -- -- 5,900 70.0 40.0

1199 140 0.700 490 15.0 <0.1 -- <0.04 15 33.0 4.00

1200 290 43.0 2,500 11.0 0.300 -- <0.04 4,500 560 <1

1201 850 1.60 41.0 21.0 27.0 -- -- 40 <10 22.0

1202 690 1.30 61.0 11.0 21.0 -- -- 40 <10 16.0

1203 470 1.90 17.0 8.60 14.0 -- -- 50 <10 8.00

1204 530 1.20 97.0 8.80 20.0 -- -- 80 20.0 22.0

1205 1,000 2.50 21.0 32.0 24.0 -- -- 190 30.0 25.0

1206 670 1.20 8.60 15.0 14.0 -- <0.04 20 20.0 <1

1207 290 0.700 0.400 9.50 21.0 -- <0.04 14 42.0 2.00

1208 210 0.700 370 7.80 <0.1 -- <0.04 5.0 73.0 <1

1209 200 0.500 360 9.80 0.100 -- <0.04 12 44.0 1.00

1210 120 1.50 320 10.0 0.500 -- 0.25 10 60.0 1.00

1211 270 1.80 470 20.0 0.800 -- 0.10 <10 330 1.00

1213 720 2.00 12.0 9.70 20.0 0.10 -- 80 <10 11.0

1230 330 1.80 210 18.0 5.10 -- 0.54 40 10.0 1.00

1237 180 3.20 280 19.0 0.600 0.080 -- 50 470 6.00

1239 220 0.500 450 23.0 0.600 0.20 -- 8,800 490 15.0

1244 6.60 0.400 48.1 16.8 -- -- 0.70 -- -- --
Appendix 147

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1250 170 3.80 1,200 70.0 0.200 -- 7.79 120 -- --

1251 -- -- -- -- -- -- -- -- -- --

1252 -- -- -- -- -- -- -- -- -- --

1253 710 21.0 3,200 43.0 0.600 -- 0.030 50 -- --

1254 -- -- -- -- -- -- -- -- -- --

1256 -- -- -- -- -- -- -- -- -- --

1260 -- -- -- -- -- -- -- -- -- --

1265 -- -- -- -- -- -- -- -- -- --

1267 -- -- -- -- -- -- -- -- -- --

1272 -- -- -- -- -- -- -- -- -- --

1273 -- -- -- -- -- -- -- -- -- --

1277 31.0 1.40 78.0 12.0 0.500 -- -- <10 <10 <1

1282 -- -- -- -- -- -- -- -- -- --

1297 -- -- -- -- -- -- -- -- -- --

1302 -- -- -- -- -- -- -- -- -- --

1305 180 2.90 230 6.10 0.700 -- -- <10 40.0 1.00

1306 -- -- -- -- -- -- -- -- -- --

1307 -- -- -- -- -- -- -- -- -- --

1317 19.1 4.20 121 16.0 -- -- 1.30 -- -- --

1318 66.1 2.00 1,617 6.50 -- -- <0.05 -- -- --

1321 660 1.50 0.700 340 22.0 -- <0.08 70 10.0 <1

1327 -- -- -- -- -- -- -- -- -- --

1328 710 2.40 5.30 67.0 2.50 -- -- 180 <10 --

1329 -- -- -- -- -- -- -- -- -- --

1330 -- -- 16.0 90.0 -- -- -- -- -- --

1333 -- -- -- -- -- -- -- -- -- --

1369 -- -- -- -- -- -- -- -- -- --

1371 -- -- 13.0 4.00 1.00 -- 0.36 -- -- --

1381 -- -- -- -- -- -- -- -- -- --

1382 -- -- -- -- -- -- -- -- -- --

1383 -- -- -- -- -- -- -- -- -- --

1387 -- -- -- -- -- -- -- -- -- --

1388 -- -- -- -- -- -- -- -- -- --

1389 5,100 60.0 3,100 7,900 2.00 -- -- 60 8.00 --

1390 4,200 46.0 2,100 12,000 1.10 -- -- 110 550 --

1391 180 16.0 7.00 190 0.400 -- -- 40 20.0 --

1392 6,100 52.0 3,000 7,900 3.30 -- -- 60 60.0 --

1393 2,600 12.0 5,400 2,800 0.700 -- -- 120 490 --

1395 -- -- -- -- -- -- -- -- -- --

1403 -- -- -- -- -- -- -- -- -- --

1409 -- -- -- -- -- -- -- -- -- --

1410 44.0 1.50 110 16.0 0.600 -- -- 60 20.0 <1

1411 -- -- -- -- -- -- -- -- -- --

1415 -- -- -- -- -- -- -- -- -- --

1416 -- -- -- -- -- -- -- -- -- --

1418 200 13.0 39.0 3.80 0.800 -- -- 2,200 80.0 <1

1419 11.5 1.70 163 14.8 -- -- 1.40 -- -- --

1420 48.2 1.40 112 20.0 -- -- 2.60 -- -- --

1421 28.0 0.500 40.0 1.80 0.200 -- -- 30 <5 4.00

1422 140 1.20 390 7.00 0.600 -- -- -- -- 1.00

1423 820 2.60 6.00 230 21.0 -- <0.08 110 20.0 <1

1426 330 2.00 18.0 68.0 <0.1 -- -- 50 <10 9.00

1433 310 0.900 5.70 14.0 17.0 0.020 -- 90 40.0 4.00

1438 190 0.900 490 8.70 0.800 0.020 -- 280 530 5.00

1443 170 1.60 560 8.70 0.400 0.020 -- 110 60.0 4.00

1445 120 1.80 170 7.70 0.200 0.070 -- 80 180 2.00

1448 230 1.10 220 9.90 1.50 0.10 -- 160 20.0 <1

1450 280 0.800 41.0 62.0 30.0 0.20 -- 260 <10 <1

1452 280 1.60 460 16.0 1.10 0.10 -- 250 50.0 <1

1454 220 0.400 320 7.30 2.20 -- <0.08 1,000 56.0 <1

1461 -- -- -- -- -- -- -- -- -- --

1463 -- -- -- -- -- -- -- -- -- --

1464 -- -- -- -- -- -- -- -- -- --

1465 -- -- -- -- -- -- -- -- -- --

1466 1,200 1.90 48.0 130 60.0 -- -- 80 <10 6.00
148 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1467 240 2.40 570 8.60 0.200 -- -- 380 <10 6.00

1468 170 0.800 340 11.0 0.800 -- -- 90 <10 3.00

1469 180 3.50 2,300 29.0 2.40 -- -- 60 220 2.00

1475 130 0.400 570 17.0 0.500 -- <0.09 820 19.0 17.0

1476 150 3.70 690 16.0 0.700 -- <0.09 700 110 7.00

1477 320 0.700 300 16.0 7.70 -- -- 210 <10 3.00

1478 1,000 1.70 350 88.0 35.0 -- -- 40 33.0 --

1480 2,000 4.90 190 140 47.0 -- -- 200 <10 --

1482 200 1.30 350 10.0 2.60 0.060 -- 2,000 50.0 32.0

1484 260 0.800 230 13.0 11.0 0.10 -- 60 <10 4.00

1486 180 0.300 230 7.90 1.60 0.10 -- 320 20.0 <1

1487 190 0.400 400 22.0 1.70 0.10 -- 90 <10 1.00

1488 160 0.300 320 8.90 1.00 0.10 -- 160 50.0 1.00

1492 540 1.40 130 <0.1 11.0 0.070 -- 750 <10 1.00

1497 -- -- -- -- -- -- -- -- -- --

1498 14.0 2.70 69.0 2.80 0.100 -- -- 100 30.0 1.00

1499 390 1.40 13.0 12.0 9.70 0.10 -- 3,400 60.0 42.0

1502 160 0.600 55.0 5.10 3.80 0.10 -- 60 20.0 2.00

1506 -- -- -- -- -- -- -- -- -- --

1507 770 1.20 10.0 160 20.0 -- -- 1,600 30.0 --

1508 310 0.500 140 18.0 13.0 -- -- 260 20.0 --

1509 -- -- -- -- -- -- -- -- -- --

1510 -- -- -- -- -- -- -- -- -- --

1512 180 0.300 200 11.0 0.400 -- <0.07 22 10.0 3.00

1513 440 0.800 2.00 110 22.0 -- 0.040 170 7.00 5.00

1514 26,105 131 -- -- 0.843 -- <0.4 1,339 7.65 13.9

1515 559 1.06 <0.31 13.0 15.0 -- <0.08 63 29.9 0.70

1516 6,026 14.6 2.18 530 19.5 -- <0.16 342 31.4 2.98

1517 12,944 26.4 40.8 1,060 40.2 -- <0.24 661 <15 24.3

1518 230 0.600 230 17.0 3.10 0.10 -- 2,400 100 5.00

1519 230 0.500 380 30.0 2.00 -- -- 200 20.0 1.00

1523 680 1.90 100 39.0 9.80 0.10 -- 60 50.0 14.0

1526 1,700 2.70 58.0 98.0 26.0 0.30 -- 50 20.0 14.0

1530 4,800 7.20 64.0 290 18.0 0.40 -- -- 20.0 2.00

1532 1,500 1.50 1,500 59.0 2.00 0.40 -- 110 20.0 26.0

1535 735 3.39 1,741 66.9 0.732 -- 0.23 <30 7.95 <2

1536 2,900 4.60 41.0 190 33.0 0.30 -- 240 30.0 1.00

1538 436 13.6 -- -- 33.4 -- <0.06 106 5.05 0.51

1539 15,036 47.2 <0.3 1,167 1.46 -- <0.32 654 <20 68.0

1539 15,429 47.3 <0.31 1,166 1.46 -- <0.32 654 <20 63.6

1540 624 1.01 43.3 96.8 12.3 -- <0.08 11 11.9 2.48

1541 676 3.09 <0.31 615 11.0 -- <0.08 6,396 465 <2

1542 436 1.68 659 26.2 1.40 -- <0.08 153 22.7 <5

1546 320 0.500 430 12.0 2.10 0.070 <0.08 20 8.00 2.00

1547 370 0.800 5.70 13.0 18.0 0.020 <0.08 150 7.00 1.00

1549 650 2.40 850 57.0 0.900 0.30 -- 60 <10 1.00

1552 230 3.90 690 20.0 0.500 0.20 -- <10 160 5.00

1555 8,450 729 <5 11,874 -- 497.00 -- -- -- --

1558 -- -- -- -- -- -- -- -- -- --

1559 -- -- -- -- -- -- -- -- -- --

1560 -- -- -- -- -- -- -- -- -- --

1561 -- -- -- -- -- -- -- -- -- --

1565 -- -- -- -- -- -- -- -- -- --

1566 -- -- -- -- -- -- -- -- -- --

1567 -- -- -- -- -- -- -- -- -- --

1568 -- -- -- -- -- -- -- -- -- --

1571 120 1.60 170 10.0 0.600 0.20 -- 50 <10 <1

1576 310 2.80 480 31.0 0.600 0.20 -- 30 480 21.0

1580 110 4.80 190 13.0 0.500 0.080 -- 60 <10 4.00

1581 1,700 7.80 10.0 310 -- -- -- 40 10.0 2.00

1587 940 3.70 1,100 270 0.100 0.40 -- 70 20.0 66.0

1592 -- -- -- -- -- -- -- -- -- --

1593 -- -- -- -- -- -- -- -- -- --

1594 -- -- -- -- -- -- -- -- -- --

1595 -- -- -- -- -- -- -- -- -- --
Appendix 149

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1596 -- -- -- -- -- -- -- -- -- --

1597 -- -- -- -- -- -- -- -- -- --

1598 330 4.20 480 21.0 1.50 -- -- 40 <10 <1

1599 -- -- -- -- -- -- -- -- -- --

1600 -- -- -- -- -- -- -- -- -- --

1601 -- -- -- -- -- -- -- -- -- --

1602 1,400 2.70 130 59.0 30.0 -- -- 50 10.0 --

1603 270 0.500 390 8.90 1.70 -- -- 130 5.00 4.00

1604 1,600 2.20 25.0 66.0 35.0 -- -- 230 <10 <1

1605 1,100 1.00 34.0 65.0 21.0 -- -- 230 <10 1.00

1607 130 1.40 480 11.0 0.400 0.010 -- <10 240 30.0

1609 230 1.90 700 15.0 0.400 0.030 -- <10 40.0 2.00

1610 1,100 3.60 110 93.0 42.0 -- -- 100 13.0 --

1612 1,800 2.50 51.0 70.0 34.0 0.30 -- 50 <10 4.00

1613 270 1.40 180 14.0 5.60 0.080 <0.08 66 20.0 4.00

1614 380 1.20 13.0 19.0 21.0 0.040 <0.08 13 38.0 2.00

1617 1,200 1.90 19.0 52.0 34.0 0.070 -- 110 <10 16.0

1622 2,800 22.0 310 1,800 8.80 -- -- 280 20.0 26.0

1623 96.0 1.20 310 6.10 0.400 -- -- 20 10.0 1.00

1626 75.0 1.00 200 6.30 0.400 0.040 -- 49,000 160 7.00

1628 110 1.20 310 7.50 0.400 0.020 -- 470 500 4.00

1631 -- -- -- -- -- -- 3.12 -- -- --

1632 370 10.0 2,400 250 0.500 -- -- 150 300 --

1633 270 7.00 2,100 250 0.400 -- 3.25 <10 200 --

1634 500 8.00 2,500 170 0.600 -- 2.64 440 190 --

1635 4,183 13.6 1,224 4,880 0.616 -- -- -- -- 7.23

1636 -- -- -- -- -- -- -- -- -- 5.63

1639 -- -- -- -- -- -- -- -- -- --

1640 86.6 3.42 210 85.8 0.301 -- -- <10 5.82 --

1641 -- -- -- 356 -- -- -- -- -- --

1642 -- -- -- -- -- -- -- -- -- --

1643 -- -- -- -- -- -- -- -- -- --

1644 -- -- -- -- -- -- -- -- -- --

1645 -- -- -- -- -- -- -- -- -- --

1646 -- -- -- -- -- -- -- -- -- --

1647 -- -- -- -- -- -- -- -- -- --

1648 -- -- -- -- -- -- -- -- -- --

1649 -- -- -- -- -- -- -- -- -- --

1650 -- -- -- -- -- -- -- -- -- --

1651 491 9.10 2,487 227 0.957 -- -- <40 1,772 --

1652 547 9.60 2,907 315 0.972 -- -- <40 1,774 <1

1653 736 21.4 2,961 416 1.08 -- -- 103 1,531 8.00

1654 660 12.0 3,500 300 1.10 -- 5.78 10 350 --

1655 -- -- -- -- -- -- <0.05 -- -- --

1656 -- -- -- -- -- -- <0.05 -- -- --

1657 -- -- -- -- -- -- <0.05 -- -- --

1658 -- -- -- -- -- -- 16.00 -- -- --

1659 -- -- -- -- -- -- 9.30 -- -- --

1660 27.0 3.80 41.0 9.40 0.800 -- -- <10 <10 --

1661 31.0 12.0 27.0 17.0 1.10 -- -- <10 20.0 --

1662 53.0 12.0 31.0 5.90 0.600 -- -- <10 <10 --

1664 25.3 10.8 20.0 2.00 0.900 -- -- -- <5 --

1665 23.1 3.20 20.0 3.00 0.600 -- -- -- <5 --

1666 18.0 5.30 17.3 1.66 1.20 -- 0.062 -- -- --

1667 32.0 1.90 16.5 2.47 1.20 -- 0.054 -- -- --

1668 890 2.50 1,670 182 1.90 -- <0.29 -- -- --

1669 248 5.30 494 85.6 -- -- 3.00 -- -- --

1670 -- -- -- -- -- -- -- -- -- --

1671 58.0 5.80 96.0 13.0 0.400 -- -- 40 40.0 <1

1672 210 0.900 57.0 17.0 0.900 -- -- 50 <10 --

1673 -- -- -- -- -- -- -- -- -- --

1674 90.6 3.10 190 98.2 0.325 -- -- -- -- --

1675 -- -- -- -- -- -- -- -- -- --

1676 -- -- -- -- -- -- -- -- -- --

1677 600 11.0 1,100 100 1.10 -- 1.49 760 40.0 4.00
150 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1678 1,672 11.9 4,270 1,129 0.453 -- -- 2,470 1,289 --

1679 248 3.87 548 92.0 1.15 -- -- -- -- --

1680 485 5.47 1,022 149 1.21 -- -- -- -- --

1681 -- -- -- -- -- -- -- -- -- --

1682 -- -- -- -- -- -- -- -- -- --

1683 1,581 12.2 3,366 1,201 0.111 -- -- -- -- --

1684 -- -- -- -- -- -- -- -- -- --

1685 -- -- -- -- -- -- -- -- -- --

1686 533 8.98 2,109 260 0.504 -- -- -- -- --

1687 -- -- -- -- -- -- -- -- -- --

1688 -- -- -- -- -- -- -- -- -- --

1689 1,113 10.8 4,399 940 0.353 -- -- 7,206 7,243 --

1690 -- -- -- -- -- -- -- -- -- --

1691 -- -- -- -- -- -- -- -- -- --

1692 -- -- -- -- -- -- -- -- -- --

1693 521 7.13 1,826 377 0.376 -- -- 2,045 -- --

1694 -- -- -- -- -- -- -- -- -- --

1695 -- -- -- -- -- -- -- -- -- --

1696 1,908 1.33 5,582 1,096 0.493 -- -- <60 4,313 --

1697 -- -- -- -- -- -- -- -- -- --

1699 -- -- -- -- -- -- -- -- -- --

1700 -- -- -- -- -- -- -- <60 2,365 --

1701 -- -- -- -- -- -- -- -- -- --

1702 414 6.76 1,113 198 0.800 -- -- -- -- --

1703 -- -- -- -- -- -- -- -- -- --

1704 -- -- -- -- -- -- -- -- -- --

1705 -- -- -- -- -- -- -- -- -- --

1706 -- -- -- -- -- -- -- -- -- --

1707 1,552 12.6 4,798 911 0.560 -- -- <60 993 --

1708 891 1.57 2,676 484 0.423 -- -- -- -- --

1709 -- -- -- -- -- -- -- -- -- --

1710 -- -- -- -- -- -- -- -- -- --

1711 -- -- -- -- -- -- -- -- -- --

1712 -- -- -- -- -- -- -- -- -- --

1713 1,161 11.4 2,996 505 0.152 -- -- -- -- --

1714 1,327 11.3 4,484 723 0.541 -- -- <50 901 --

1715 -- -- -- -- -- -- -- -- -- --

1716 -- -- -- -- -- -- -- -- -- --

1723 410 4.10 1,300 20.0 0.700 -- -- 40 <10 1.00

1727 1,100 28.0 2,800 260 0.300 -- -- 60 150 --

1728 620 7.60 2,600 310 0.400 -- -- <10 240 --

1730 -- -- -- -- -- -- -- 61 35.0 --

1731 -- -- -- -- -- -- -- -- -- --

1732 98.0 2.40 53.0 9.60 0.400 -- <0.04 -- -- <1

1733 190 1.10 43.0 6.70 0.500 -- -- 30 5.00 8.00

1734 -- -- -- -- -- -- -- -- -- --

1735 -- -- -- -- -- -- -- -- -- --

1736 -- -- -- -- -- -- -- -- -- --

1738 77.0 2.90 50.0 4.60 0.400 -- -- 30 20.0 --

1741 -- -- -- -- -- -- <0.05 -- -- --

1742 -- -- -- -- -- -- <0.05 -- -- --

1743 -- -- -- -- -- -- <0.05 -- -- --

1744 -- -- -- -- -- -- 4.39 -- -- --

1745 66.5 1.60 50.0 1.00 0.500 -- -- -- <5 --

1747 -- -- 7,400 -- -- -- <0.04 780 40.0 --

1752 120 3.80 230 12.0 0.420 -- 0.97 <70 12.0 --

1753 30.0 2.10 34.0 1.90 0.300 -- <0.29 <70 31.0 --

1754 -- -- -- -- -- -- -- -- -- --

1755 52.0 2.60 68.0 4.30 0.440 -- 0.084 <70 <5 --

1756 40.0 2.50 46.0 2.70 0.450 -- 0.084 <70 <5 --

1757 43.0 1.60 70.0 4.50 0.460 -- 0.19 <70 1,600 --

1758 36.0 1.80 78.0 4.10 0.340 -- 0.072 <70 <5 --

1759 210 2.10 250 14.0 0.600 -- <0.29 <70 <5 --

1760 57.0 1.60 120 8.60 0.300 -- 0.050 <70 <5 --

1761 64.0 <3 -- -- -- -- -- -- -- <15
Appendix 151

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1762 -- -- -- -- -- -- -- -- -- --

1763 -- -- -- -- -- -- -- 497 <3 --

1765 830 12.0 3,100 240 1.50 -- 3.81 260 540 --

1766 2,600 16.0 7,700 500 0.800 -- -- <10 110 --

1768 310 2.90 2,500 190 0.300 -- 2.15 <10 860 --

1769 250 2.10 2,000 270 0.300 -- 7.58 <10 450 --

1770 -- -- -- -- -- -- -- -- -- --

1771 86.0 3.20 100 7.70 1.90 -- -- 40 <10 --

1772 46.0 4.10 40.0 6.00 0.400 -- -- <10 <10 --

1773 43.8 1.10 50.0 6.00 0.700 -- -- -- 9.00 --

1774 -- -- -- -- -- -- -- -- -- --

1776 275 0.600 20.0 3.00 1.70 -- -- -- <5 --

1777 168 0.600 80.0 3.00 0.800 -- -- -- <5 --

1778 42.9 1.60 30.0 5.00 0.700 -- -- -- <5 --

1779 25.2 8.30 90.0 14.0 0.300 -- -- -- <5 --

1780 16.1 4.70 20.0 4.00 0.200 -- -- -- <5 --

1781 24.2 2.80 40.0 7.00 0.300 -- -- -- <5 --

1782 220 0.540 74.5 10.7 2.70 -- 0.032 -- -- --

1783 170 0.390 57.6 1.16 0.860 -- <0.29 -- -- --

1784 140 0.740 32.5 3.21 <0.5 -- <0.29 -- -- --

1785 160 0.600 20.2 9.66 <0.5 -- 0.035 -- -- --

1786 30.0 5.10 37.5 4.99 0.830 -- 0.078 -- -- --

1787 -- -- -- -- -- -- -- -- -- --

1788 450 8.30 2,000 150 <0.5 -- 2.06 <70 <5 --

1789 -- -- -- -- -- -- -- -- -- --

1790 -- -- -- -- -- -- -- -- -- --

1791 -- -- -- -- -- -- -- -- -- --

1792 -- -- -- -- -- -- -- -- -- --

1793 -- -- -- -- -- -- -- -- -- --

1794 19.0 2.30 21.0 3.90 0.600 -- -- 20 <10 --

1795 47.0 17.0 49.0 9.20 0.800 -- -- 20 <10 --

1796 113 1.20 70.0 25.0 0.100 -- -- -- <5 --

1797 47.0 3.50 40.0 6.00 0.600 -- -- -- <5 --

1798 107 4.00 110 23.0 0.800 -- -- -- 26.0 --

1799 9.40 0.600 <5 <1 1.50 -- -- -- <5 --

1800 53.1 4.10 50.0 10.0 0.200 -- -- -- <5 --

1801 22.6 3.00 30.0 6.00 1.20 -- -- -- <5 --

1802 85.9 0.900 180 12.0 1.20 -- -- -- <5 --

1803 66.0 0.700 90.0 6.00 1.40 -- -- -- <5 --

1804 22.4 5.20 30.0 6.00 0.200 -- -- -- <5 --

1805 42.3 5.00 40.0 5.00 0.400 -- -- -- <5 --

1806 28.0 4.20 30.0 5.00 0.200 -- -- -- <5 --

1807 170 0.580 0.680 2.10 1.40 -- <0.29 -- -- --

1807 -- -- -- -- -- -- -- -- -- --

1808 200 7.60 827 26.5 0.660 -- <0.29 -- -- --

1809 68.0 1.00 48.2 4.38 1.60 -- 0.080 -- -- --

1810 39.0 11.0 31.1 6.73 0.790 -- 0.25 -- -- --

1811 42.0 9.50 24.0 2.70 0.680 -- 0.070 <70 <5 --

1812 59.0 14.0 34.0 3.50 0.760 -- 0.086 <70 <5 --

1813 280 2.50 190 9.20 3.00 -- <0.29 130 <5 --

1814 5.40 0.620 5.30 4.10 1.40 -- 0.070 <70 <5 --

1815 189 0.700 17.8 16.4 -- -- 4.90 -- -- --

1816 79.0 4.50 54.0 11.0 1.20 -- 0.54 <70 <5 --

1817 63.0 -- 35.0 4.10 0.630 -- 0.14 <70 <5 --

1818 15.0 0.880 6.90 2.00 2.00 -- 0.14 <70 <5 --

1819 69.3 1.10 72.7 6.00 -- -- 0.50 -- -- --

1820 97.0 3.50 68.0 9.00 0.740 -- 0.043 <70 17.0 --

1821 24.0 1.10 6.40 5.80 1.20 -- 0.15 <70 <5 --

1822 30.0 1.60 7.30 1.50 1.50 -- 0.052 <70 <5 --

1827 17.7 1.50 -- -- -- -- -- <100 16.8 1.54

1828 16.4 1.59 -- -- -- -- -- <100 <1 <1

1829 -- -- 8,400 -- -- -- <0.04 <10 30.0 --

1830 75.0 1.40 70.0 33.0 0.400 -- -- <10 <10 --

1832 12.7 2.60 20.0 2.00 0.200 -- -- -- <5 --

1833 110 9.80 200 18.0 1.10 -- -- 20 <10 --
152 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1837 700 4.30 2,100 24.0 0.500 -- -- 190 60.0 2.00

1842 254 1.16 1,463 38.5 0.948 -- -- -- -- --

1843 1,104 16.6 6,066 87.9 1.96 -- -- -- -- --

1845 -- -- -- -- -- -- -- -- -- --

1847 498 11.5 4,019 34.5 5.52 -- -- -- -- --

1855 13.0 5.90 3.90 4.10 <0.5 -- 0.28 -- -- --

1856 5.90 3.80 3.60 2.80 <0.5 -- 0.21 -- -- --

1857 5.70 1.60 3.60 <1 <0.5 -- 0.10 -- -- --

1858 9.40 2.20 69.0 1.50 <0.5 -- 0.097 -- -- --

1859 19.0 1.50 9.70 6.40 <0.5 -- 0.10 -- -- --

1860 11.0 2.90 4.80 1.40 <0.5 -- 0.13 -- -- --

1861 9.40 2.60 6.50 2.10 <0.5 -- 0.21 -- -- --

1862 20.0 2.60 36.0 7.30 <0.4 -- 0.045 -- -- --

1863 210 8.00 709 46.6 0.580 -- 0.34 -- -- --

1864 -- -- 23.9 -- -- -- -- -- -- --

1865 -- -- -- -- -- -- -- -- -- --

1866 -- -- -- -- -- -- -- -- -- --

1867 -- -- 131 -- -- -- -- -- -- --

1868 -- -- 510 -- -- -- -- -- -- --

1869 -- -- 8.85 -- -- -- -- -- -- --

1870 -- -- 2.88 -- -- -- -- -- -- --

1871 -- -- 408 -- -- -- -- -- -- --

1872 -- -- 228 -- -- -- -- -- -- --

1873 -- -- -- -- -- -- -- -- -- --

1874 -- -- 2.10 -- -- -- -- -- -- --

1875 -- -- 3,153 -- -- -- -- -- -- --

1876 -- -- 3,243 -- -- -- -- -- -- --

1877 -- -- 1,321 -- -- -- -- -- -- --

1878 -- -- 998 -- -- -- -- -- -- --

1879 -- -- 1,971 -- -- -- -- -- -- --

1880 -- -- 2,627 -- -- -- -- -- -- --

1881 -- -- 761 -- -- -- -- -- -- --

1882 -- -- -- -- -- -- -- -- -- --

1883 -- -- 1,214 -- -- -- -- -- -- --

1884 -- -- 390 -- -- -- -- -- -- --

1885 -- -- 296 -- -- -- -- -- -- --

1886 -- -- 31.3 -- -- -- -- -- -- --

1887 13.6 3.10 35.0 -- -- -- 0.10 -- -- --

1888 -- -- 36.0 -- -- -- -- -- -- --

1889 -- -- 709 -- -- -- -- -- -- --

1890 -- -- -- -- -- -- 0.90 -- -- --

1891 11.0 2.80 6.00 4.80 0.200 -- -- 44 2.00 <1

1895 530 2.70 1.00 15.0 5.40 -- -- 10 9.00 1.00

1896 860 7.20 20.0 90.0 3.00 -- -- 40 10.0 6.00

1897 150 1.30 230 14.0 0.800 -- -- 150 20.0 <1

1898 86.0 2.40 210 9.80 0.700 -- -- 580 30.0 <1

1899 110 4.60 3.00 11.0 0.400 -- -- 490 29.0 <1

1900 220 1.90 130 18.0 2.60 -- -- 160 40.0 1.00

1904 21.0 5.70 24.0 4.70 0.500 -- -- 30 <10 1.00

1906 -- -- -- -- -- -- -- -- -- --

1907 41.0 12.0 18.0 2.70 0.400 -- -- 13 20.0 4.00

1908 -- -- -- -- -- -- -- -- -- --

1909 11.0 0.670 6.00 2.40 <0.5 -- -- -- -- --

1910 -- -- -- -- -- -- -- -- -- --

1911 -- -- 8.70 -- -- -- -- -- -- --

1912 -- -- 31.0 -- -- -- -- -- -- --

1913 13.2 7.20 -- 8.40 -- -- 1.30 -- -- --

1914 13.4 5.50 12.9 7.00 -- -- 1.00 -- -- --

1915 -- -- 0.830 -- -- -- -- -- -- --

1916 -- -- 20.7 -- -- -- -- -- -- --

1917 -- -- 20.4 -- -- -- -- -- -- --

1918 -- -- 8.10 -- -- -- -- -- -- --

1919 2.20 1.80 1.50 <1 <0.5 -- 0.075 -- -- --

1920 2.00 1.60 1.70 <1 <0.5 -- 0.059 -- -- --

1921 2.80 2.00 2.00 <1 <0.5 -- 0.047 -- -- --
Appendix 153

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

1925 600 2.60 3,000 24.0 0.300 -- 0.96 1,200 330 --

1926 600 14.0 2,900 26.0 <0.1 -- 2.05 20 160 --

1928 110 4.30 1,600 11.0 1.50 -- -- 60 20.0 <1

1930 -- -- -- -- -- -- -- 123 20.0 --

1931 -- -- -- -- -- -- -- 168 41.0 --

1932 -- -- -- -- -- -- -- 172 11.0 --

1937 17.0 6.00 12.7 3.70 0.960 -- 0.12 -- -- --

1938 2.30 1.20 4.70 <1 <0.5 -- 0.11 -- -- --

1939 8.90 1.00 <5 <1 <0.5 -- -- -- -- --

1940 -- -- 7.10 -- -- -- -- -- -- --

1941 -- -- 19.9 -- -- -- -- -- -- --

1942 -- -- 5.10 -- -- -- -- -- -- --

1943 -- -- 44.9 -- -- -- -- -- -- --

1944 -- -- -- -- -- -- -- -- -- --

1945 -- -- -- -- -- -- -- -- -- --

1946 34.0 2.30 31.2 12.6 0.200 -- 0.061 -- -- --

1947 5.40 3.60 4.90 5.30 0.100 -- 0.77 -- -- --

1951 122 3.10 1,638 7.20 -- -- 0.12 -- -- --

1955 1,300 13.0 11.0 180 1.90 -- -- 310 120 5.00

1962 750 6.50 <5 56.0 3.50 -- -- 100 40.0 1.00

1967 3.70 3.00 1.70 1.50 <0.5 -- 0.22 -- -- --

1968 1.40 1.80 2.30 1.10 <0.5 -- 0.42 -- -- --

1969 6.40 1.10 2.70 1.60 <0.5 -- -- -- -- --

1970 2.00 4.60 1.80 1.60 <0.5 -- -- -- -- --

1971 2.20 1.20 4.20 <1 <0.5 -- 0.16 -- -- --

1972 11.0 10.0 2.20 3.40 <0.5 -- 0.62 -- -- --

1973 55.0 1.30 3.90 1.40 <0.5 -- 0.036 -- -- --

1974 2.90 1.60 1.60 <1 <0.5 -- 0.050 -- -- --

1975 -- -- 4.70 -- -- -- -- -- -- --

1976 -- -- 1.23 -- -- -- -- -- -- --

1978 190 5.40 150 7.90 0.500 -- -- 150 13.0 1.00

1981 -- -- -- -- -- -- -- -- -- --

1982 -- -- -- -- -- -- -- -- -- --

1983 -- -- -- -- -- -- -- -- -- --

1986 104 11.1 633 9.62 0.755 -- -- -- <1 1.38

1990 -- -- -- -- -- -- -- -- -- --

1993 -- -- -- -- -- -- -- -- -- --

1995 -- -- -- -- -- -- 3.80 -- -- --

1996 -- -- -- -- -- -- 1.10 -- -- --

2001 77.0 19.0 190 7.90 0.600 -- -- <10 <10 --

2002 110 12.0 210 6.40 0.500 -- -- 40 <10 5.00

2003 -- -- -- -- -- -- -- -- -- --

2011 -- -- -- -- -- -- -- -- -- --

2012 -- -- -- -- -- -- -- -- -- --

2013 -- -- 12.7 -- -- -- -- -- -- --

2014 -- -- 393 -- -- -- -- -- -- --

2015 100 25.0 393 19.7 0.710 -- 0.42 -- -- --

2016 60.7 8.10 113 12.7 -- -- 1.30 -- -- --

2017 20.5 1.60 29.2 12.9 -- -- 0.60 -- -- --

2018 10.2 2.30 11.3 2.60 -- -- 0.50 -- -- --

2019 -- -- -- -- -- -- 0.90 -- -- --

2020 -- -- -- -- -- -- 3.10 -- -- --
154 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Sodium,

dissolved

(mg/L)

Potassium,

dissolved

(mg/L)

Sulfate,

dissolved

(mg/L)

Chloride,

dissolved

(mg/L)

Fluoride,

dissolved

(mg/L)

Bromide,

dissolved

(mg/L)

Nitrite+Nitrate,

dissolved

(mg/L as N)

Iron,

dissolved

(ug/L)

Manganese,

dissolved

(ug/L)

Arsenic,

dissolved

(ug/L)

2021 -- -- -- -- -- -- 0.80 -- -- --

2022 -- -- -- -- -- -- 0.80 -- -- --

2023 -- -- -- -- -- -- -- -- -- --

2024 -- -- -- -- -- -- 0.60 -- -- --

2025 -- -- -- -- -- -- -- -- -- --

2027 340 9.00 2,400 19.0 0.400 -- 3.25 <10 30.0 --

2029 -- -- -- -- -- -- -- -- -- --

2030 -- -- -- -- -- -- 2.60 -- -- --

2033 1,500 25.0 5,200 88.0 0.300 -- -- 50 120 <1

2034 -- -- -- -- -- -- -- -- -- --

2035 -- -- -- -- -- -- 0.70 -- -- --

2037 -- -- -- -- -- -- -- -- -- --

2040 -- -- -- -- -- -- -- -- -- --

2041 400 9.40 290 63.0 1.30 -- -- 170 22.0 1.00

2044 67.0 1.90 610 9.80 1.50 -- -- 160 30.0 --

2046 1,100 19.0 60.0 82.0 2.90 -- <0.04 620 80.0 <1

2046 1,100 19.0 71.0 80.0 2.90 -- <0.04 520 70.0 <1

2049 -- -- -- -- -- -- -- 1,720 61.0 --

2050 -- -- -- -- -- -- -- 934 35.0 --

2051 -- -- -- -- -- -- -- 81 12.0 --

2052 -- -- -- -- -- -- -- -- -- --

2053 89.0 2.00 380 15.0 0.600 -- -- <10 4.00 --

2054 40.0 6.20 110 18.0 0.800 -- -- 40 <10 --

2055 -- -- -- -- -- -- -- -- -- --

2056 -- -- -- -- -- -- -- -- -- --

2058 440 10.0 240 37.0 6.00 -- -- 1,000 <10 --

2061 78.0 1.70 1,400 14.0 1.50 -- 6.79 20 10.0 --

2063 -- -- -- -- -- -- -- -- -- --

2064 -- -- -- -- -- -- -- 6,701 117 --

2065 16.0 2.30 36.0 5.70 0.200 -- -- 180 30.0 --

2066 -- -- -- -- -- -- -- -- -- --

2067 -- -- -- -- -- -- -- -- -- --

2068 -- -- -- 19.0 -- -- -- <500 -- --

2069 -- -- -- -- -- -- -- -- -- --

2070 -- -- -- -- -- -- -- -- -- --

2071 43.0 2.00 16.0 1.60 0.300 -- -- 60 <10 --

2072 -- -- -- -- -- -- -- -- -- --

2076 102 4.37 1,712 22.0 1.01 -- -- -- -- --

2077 -- -- -- -- -- -- -- -- -- --

2078 22.0 0.200 72.0 22.0 0.300 -- -- 10 <5 --

2079 -- -- 54.0 14.0 -- -- 0.20 -- -- --

2080 -- -- -- -- -- -- -- -- -- --

2082 -- -- -- -- -- -- -- -- -- --

2083 -- -- -- -- -- -- -- -- -- --

2084 -- -- -- -- -- -- -- -- -- --

2085 440 6.40 630 37.0 0.600 -- -- 1,500 90.0 <1

2088 877 20.0 850 140 -- -- -- <8 -- --

2089 -- -- -- -- -- -- -- -- -- --

2090 -- -- 52.0 17.0 -- -- 0.070 -- -- --

2091 -- -- 40.0 14.0 -- -- 0.14 -- -- --

2094 -- -- 130 -- -- -- -- -- -- --

2095 -- -- -- -- -- -- -- 56 96.0 --

2096 -- -- -- -- -- -- -- 210 4.00 --
Appendix 155

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1 -- -- <0.0008 <1 <5 <2 -- -- -- --

2 700 <1 -- -- -- -- -- -- -- --

3 600 <1 -- -- -- -- -- -- -- --

4 <100 6.00 -- -- -- -- -- -- -- --

5 7.0 19.0 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

6 -- -- -- -- -- -- -- -- -- --

8 -- -- -- -- -- -- -- -- -- --

9 122 <20 <0.0008 <1 <5 <2 -- -- -- --

13 -- -- -- -- -- -- -- -- -- --

14 -- -- -- -- -- -- -- -- -- --

15 -- -- -- -- -- -- -- -- -- --

16 -- -- -- -- -- -- -- -- -- --

17 -- -- -- <0.5 <5 <2 <3 -- -- --

18 -- -- -- <0.5 <5 <2 <3 -- -- --

19 -- -- -- <0.001 <0.005 <2 <3 -- -- --

20 -- -- -- <0.5 <5 <2 <3 -- -- --

21 -- -- -- <0.001 <0.005 3.30 3.6 -- -- --

22 -- -- -- <0.5 <5 <2 <3 -- -- --

23 -- -- -- <0.001 <0.005 <2 <3 -- -- --

24 -- -- -- <0.5 <5 <2 <3 -- -- --

25 -- -- -- <0.5 <5 <2 <3 -- -- --

26 -- -- -- <0.5 <5 <2 <3 -- -- --

27 -- -- -- <0.5 <5 <2 <3 -- -- --

28 -- -- -- <1 <5 <2 <3 -- -- --

29 -- -- -- -- -- -- -- -- -- --

30 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

31 -- -- -- -- -- -- -- -- -- --

33 -- -- -- -- -- -- -- -- -- --

34 -- -- -- -- -- -- -- -- -- --

36 -- -- -- -- -- -- -- -- -- --

38 <100 2.00 -- -- -- -- -- -- -- --

39 800 <1 -- -- -- -- -- -- -- --

40 110 <20 <0.0008 <1 <5 <2 <3 -- -- --

41 86 <20 <0.0008 <1 <5 <2 <3 -- -- --

42 -- -- <0.0008 -- -- -- -- -- -- --

43 62 <20 <0.0008 <1 <5 <2 -- -- -- --

44 53 <20 <0.0008 <1 <5 <2 -- -- -- --

45 56 <20 <0.0008 <1 <5 0.001 <3 -- -- --

46 85 <20 <0.0008 <1 <5 <2 <3 -- -- --

47 59 <20 <0.0008 <1 <5 <2 <3 -- -- --

48 59 <20 <0.0008 <1 <5 <2 -- -- -- --

49 63 <20 <0.0008 <1 <5 0.001 -- -- -- --

50 -- -- 0.002 -- -- -- -- -- -- --

51 -- -- <0.0008 <1 <5 <2 <3 -- -- --

52 -- 3.50 -- -- -- -- -- -- -- --

53 -- -- <0.0008 <1 <5 <2 -- -- -- --

54 -- -- <0.0008 <1 <5 <2 <3 -- -- --

55 -- -- <0.0008 -- -- -- -- -- -- --

56 -- -- 0.14 <1 <5 <2 -- -- -- --

57 -- -- 2.90 <1 <5 <2 -- -- -- --

58 -- -- 0.002 <1 <5 <2 -- -- -- --

59 -- -- 0.22 <1 <5 <2 -- -- -- --

60 -- -- <0.0008 <1 <5 <2 -- -- -- --

61 -- -- <0.0008 <1 <5 <2 <3 -- -- --

62 210 <20 0.028 <1 <5 <2 <3 -- -- --

63 -- -- <0.0008 <1 <5 <2 -- -- -- --

64 -- -- 0.58 <0.2 <0.2 <2 <3 -- -- --

65 -- -- <0.0008 <1 <5 <2 -- -- -- --

66 -- -- 1.30 <1 <5 <2 -- -- -- --

67 -- -- 1.00 <1 <5 <2 -- -- -- --

68 -- -- <0.0008 <1 <5 <2 <3 -- -- --

69 -- -- 0.72 <1 <5 <2 -- 12.7 0.19 0.013

70 -- -- <0.0008 <1 <5 <2 -- 0.025 0 0

71 -- -- <0.0008 <1 <5 <2 <3 -- -- --
156 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

72 -- -- <0.0008 <1 <5 <2 <3 -- -- --

73 -- -- <0.0008 <1 <5 <2 <3 -- -- --

74 -- -- <0.0008 <1 <5 <2 <3 -- -- --

75 -- -- <0.0008 <1 <5 <2 <3 -- -- --

76 -- -- <0.0008 <1 <5 <2 <3 -- -- --

77 -- -- 0.86 <0.3 1.30 <2 -- -- -- --

78 -- -- <0.0008 <0.3 <0.2 <2 -- -- -- --

79 -- <5 0.001 <1 <2 <2 -- -- -- --

80 -- <20 <0.0008 <0.5 <5 <2 <3 -- -- --

81 -- <5 <0.0008 <1 <2 <2 -- -- -- --

82 -- <5 <0.0008 <1 <2 <2 -- -- -- --

83 -- 17.5 0.007 <1 <2 <2 -- -- -- --

84 -- 13.0 0.010 <1 <2 <2 -- -- -- --

85 -- 7.30 0.053 <1 <2 <2 -- -- -- --

86 -- <20 <0.0008 <0.5 <5 <2 <3 -- -- --

87 -- 6.90 0.027 <1 <2 <2 -- -- -- --

88 -- <5 0.031 <1 <2 <2 -- -- -- --

89 -- <5 6.60 <1 <2 <2 -- 40.1 0.018 0

90 -- -- <0.0008 <1 <5 <2 -- -- -- --

91 142 <20 0.86 <1 1.30 <2 -- -- -- --

92 -- 22.0 <0.0008 <1 <5 <2 <3 -- -- --

93 -- <20 6.90 <1 <5 <2 -- -- -- --

94 -- 6.70 0.14 <1 <5 <2 -- -- -- --

95 -- <20 2.90 <1 <5 <2 -- -- -- --

96 -- 9.30 0.22 <1 <5 <2 -- -- -- --

97 -- 6.20 0.002 <1 <5 <2 -- -- -- --

98 -- -- <0.0008 <1 4.10 <2 -- -- -- --

99 -- -- 4.70 160 <5 4.60 -- 52.2 6.95 1.99

100 -- -- 6.20 110 <5 <2 -- 59.1 7.51 2.79

101 -- -- <0.0008 <1 <5 <2 -- -- -- --

102 -- -- 5.00 <1 <5 <2 -- 46.9 5.23 1.92

103 -- -- 0.002 <1 <5 <2 -- -- -- --

104 -- -- 2.80 2.40 <5 <2 -- 25.2 3.09 0

105 -- -- 0.43 <1 <5 <2 -- -- -- --

106 -- -- 2.90 <1 <5 <2 -- 31.0 3.58 1.18

107 -- -- 0.007 <1 <5 <2 -- -- -- --

108 -- <20 1.80 <1 <5 <2 <3 -- -- --

109 -- <20 6.40 <1 <5 <2 -- 43.0 0.038 0

110 -- <20 16.0 <1 <5 <2 -- 74.9 0.038 0

111 -- 18.0 <0.0008 <1 <5 <2 -- -- -- --

112 -- <20 0.054 <1 <5 <2 -- -- -- --

113 -- -- 1.30 <1 <5 <2 -- 13.3 0.80 0

114 -- -- 1.90 31.0 <5 <2 -- 28.0 3.39 0.51

115 -- -- <0.0008 <1 <5 <2 -- -- -- --

116 -- -- 1.30 <1 <5 <2 -- -- -- --

117 -- -- <0.0008 <1 <5 <2 -- -- -- --

118 -- -- 0.003 <1 <5 <2 -- -- -- --

119 -- -- 1.00 <1 <5 <2 -- -- -- --

120 -- -- <0.0008 <1 <5 <2 -- -- -- --

121 -- -- <0.0008 <1 <5 <2 -- -- -- --

122 -- -- 0.004 <1 <5 <2 -- -- -- --

123 -- -- 0.002 <1 <5 <2 -- -- -- --

124 -- 5.40 <0.0008 <1 <5 <2 -- -- -- --

125 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

126 42 47.0 <0.0008 <1 0.40 <2 -- -- -- --

127 -- <20 <0.0008 <1 <5 <2 -- -- -- --

128 -- 41.0 0.001 <1 <5 <2 -- -- -- --

129 -- 67.0 <0.0008 <1 <5 <2 -- -- -- --

130 -- <20 3.10 <1 <5 <2 <3 -- -- --

131 -- <20 7.80 <1 <5 <2 <3 34.8 0.039 0

132 97 3.00 <0.0008 <1 0.20 <2 -- -- -- --

133 -- <20 <0.0008 <1 <5 <2 -- -- -- --

134 -- 61.0 0.001 <1 <5 <2 -- -- -- --

135 -- -- 0.004 <1 <5 <2 -- -- -- --
Appendix 157

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

138 -- -- -- -- -- -- -- -- -- --

142 -- -- -- -- -- -- -- -- -- --

143 -- -- <0.0008 <1 <5 <2 -- -- -- --

144 -- -- 0.008 <1 <5 <2 -- -- -- --

145 -- -- <0.0008 -- -- -- -- -- -- --

146 -- <20 <0.0008 <0.5 <5 <2 <3 0 0 0

147 -- <20 <0.0008 <1 <5 <2 <3 0.006 0 0

148 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

149 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

150 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

151 -- <20 <0.0008 <1 <5 <2 <3 0.007 0 0

152 -- -- <0.0008 <1 <5 <2 -- -- -- --

153 -- 26.8 -- -- -- -- -- -- -- --

154 -- -- -- -- -- -- -- 76.3 0.061 0

155 -- -- 0.002 <1 <5 <2 -- -- -- --

157 -- 8.30 -- -- -- -- -- -- -- --

158 -- -- <0.0005 -- -- -- -- -- -- --

159 -- -- <0.0005 -- -- -- -- -- -- --

161 -- -- 0.054 <1 0.30 <2 -- -- -- --

162 -- -- 0.20 -- -- -- -- -- -- --

163 -- -- 0.004 -- -- -- -- -- -- --

164 -- -- 27.6 -- -- -- -- -- -- --

165 -- -- <0.0005 -- -- -- -- -- -- --

166 -- -- <0.0008 <1 <5 <2 <3 -- -- --

167 -- -- <0.0008 <1 <5 <2 <3 -- -- --

168 -- 16.5 -- -- -- -- -- -- -- --

169 -- -- -- -- -- -- -- 0.051 0 0

169 -- -- 0.003 -- -- -- -- -- -- --

170 -- -- <0.0008 <1 <5 <2 <3 -- -- --

171 -- -- -- -- -- -- -- -- -- --

172 -- -- 0.031 <1 <5 <2 <3 -- -- --

173 -- -- <0.0008 <1 <5 <2 <3 -- -- --

174 -- -- 0.78 <1 <5 <2 -- -- -- --

175 -- -- -- -- -- -- -- -- -- --

176 -- 7.70 -- -- -- -- -- -- -- --

177 -- 792 -- -- -- -- -- -- -- --

178 -- -- -- -- -- -- -- -- -- --

179 -- 44.8 -- -- -- -- -- -- -- --

180 -- -- 0.93 <1 <5 <2 <3 -- -- --

181 -- -- -- -- -- -- -- -- -- --

182 -- -- 6.10 -- -- -- -- -- -- --

182 -- -- -- -- -- -- -- 43.1 0.35 0.001

183 -- 6.00 -- -- -- -- -- -- -- --

184 -- -- -- -- -- -- -- 7.42 0.39 0

185 -- 30.9 0.006 -- -- -- -- -- -- --

186 -- 3.20 -- -- -- -- -- -- -- --

187 -- -- 3.50 <1 <5 <2 -- -- -- --

187 -- -- -- -- -- -- -- 24.0 0.023 0.006

188 -- -- 0.34 <1 <5 <2 -- -- -- --

189 -- -- 1.60 -- -- -- -- -- -- --

189 -- -- -- -- -- -- -- 12.3 0.34 0.005

191 -- -- -- -- -- -- -- -- -- --

192 -- -- 0.005 <1 <5 <2 -- -- -- --

193 -- -- -- -- -- -- -- -- -- --

194 -- -- -- -- -- -- -- -- -- --

195 -- -- <0.0008 <1 <5 <2 -- -- -- --

196 -- -- <0.0008 <1 <5 <2 <3 -- -- --

197 -- -- 1.74 -- -- -- -- -- -- --

198 -- -- -- -- -- -- -- -- -- --

199 -- 21.8 -- -- -- -- -- -- -- --

200 -- -- -- -- -- -- -- -- -- --

201 -- -- -- -- -- -- -- 0 0 0

201 -- -- 0.005 -- -- -- -- -- -- --
158 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

202 -- -- -- -- -- -- -- -- -- --

203 -- 90.9 1.90 -- -- -- -- -- -- --

203 -- -- -- -- -- -- -- 19.7 0 0

204 -- -- 0.099 <1 <5 <2 <3 -- -- --

205 -- 80.5 6.10 -- -- -- -- -- -- --

205 -- -- -- -- -- -- -- 65.8 0.009 0

206 -- -- <0.0008 <0.3 <0.2 <2 -- -- -- --

207 -- -- 1.10 <0.2 <0.2 <2 <3 -- -- --

208 -- -- <0.0008 <1 <5 <2 -- -- -- --

209 -- -- <0.0008 <1 <1 <2 <3 -- -- --

211 -- -- <0.0008 <1 <1 <2 <3 -- -- --

213 -- -- 0.26 <1 <5 <2 -- -- -- --

214 -- -- 7.30 <1 <5 <2 -- -- -- --

214 -- -- -- -- -- -- -- 75.4 0.028 0

215 -- -- 5.41 0.60 0.50 <2 -- -- -- --

216 -- -- 11.0 -- -- -- -- -- -- --

216 -- -- -- -- -- -- -- 93.3 0.048 0

217 -- -- <0.0008 <1 0.20 <2 -- -- -- --

218 -- -- 3.23 <1 0.20 <2 -- -- -- --

219 -- 12.6 -- -- -- -- -- -- -- --

220 -- 0.600 -- -- -- -- -- -- -- --

221 -- -- 0.019 <1 <5 <2 <3 -- -- --

222 -- 0.200 -- -- -- -- -- -- -- --

223 -- -- 0.27 <0.2 <0.2 <2 <3 -- -- --

224 -- <20 0.53 <1 <5 <2 -- 4.19 0.18 0

225 -- 79.0 <0.0008 <1 <5 <2 -- -- -- --

226 -- <20 1.30 <1 <5 <2 <3 17.1 0.006 0

227 -- -- -- -- -- -- -- -- -- --

228 -- 0.500 3.93 -- -- -- -- -- -- --

228 -- -- -- -- -- -- -- 63.3 0.021 0

229 -- 33.0 -- -- -- -- -- -- -- --

230 -- 8.30 0.004 <1 2.90 <2 -- 0.029 0 0

231 -- 9.30 <0.0008 <1 <5 <2 -- -- -- --

232 -- 30.0 0.50 <1 <5 <2 -- -- -- --

233 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

234 -- -- <0.0008 <1 <5 <2 -- -- -- --

235 -- -- 0.001 <0.2 <0.2 <2 <3 -- -- --

236 -- -- 1.20 <1 <2 <2 -- -- -- --

237 263 7.00 0.37 <1 <5 <2 -- -- -- --

238 -- <20 0.86 <1 <5 <2 -- 5.87 0 0

239 -- 24.0 -- -- -- -- -- -- -- --

240 45 210 <0.0008 <1 0.30 <2 -- -- -- --

241 -- -- <0.0008 -- -- -- -- -- -- --

242 -- -- <0.0008 -- -- -- -- -- -- --

243 -- -- <0.0008 -- -- -- -- -- -- --

244 -- -- <0.0008 <0.3 <0.2 <2 -- -- -- --

245 -- -- <0.0008 -- -- -- -- -- -- --

246 -- 11.0 <0.0008 <1 <5 <2 -- 0 0 0

247 140 <20 <0.0008 <1 <5 <2 <3 -- -- --

248 -- -- -- -- -- -- -- -- -- --

249 -- -- -- -- -- -- -- -- -- --

250 -- -- <0.0008 <1 <5 <2 <3 -- -- --

251 -- -- -- -- -- -- -- -- -- --

252 -- 16.1 -- -- -- -- -- -- -- --

253 -- -- -- -- -- -- -- -- -- --

254 -- 87.8 -- -- -- -- -- -- -- --

255 -- 5.50 0.010 <1 <2 <2 -- -- -- --

256 -- -- 3.80 <0.5 <5 <2 <3 -- -- --

256 -- -- -- -- -- -- -- 36.3 0.018 0

257 -- -- <0.0008 <0.5 <5 <2 <3 -- -- --

258 -- 6.30 -- -- -- -- -- -- -- --

259 -- -- <0.0008 <1 <5 <2 <3 -- -- --

259 -- -- -- -- -- -- -- 0.30 0.040 0.011
Appendix 159

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

260 -- 37.0 -- -- -- -- -- -- -- --

261 -- 1.40 -- -- -- -- -- -- -- --

262 -- -- 0.37 <0.3 <0.2 <2 -- -- -- --

263 -- -- 1.71 0.30 0.20 <2 -- -- -- --

264 -- -- -- -- -- -- -- 0 0 0

264 -- 18.6 0.004 -- -- -- -- -- -- --

265 -- -- 0.003 <0.3 0.30 <2 -- -- -- --

266 -- -- 0.49 <0.3 0.30 <2 -- -- -- --

267 -- 11.0 <0.0008 <1 <5 <2 -- 0 0 0

268 9.1 <20 <0.0008 <1 <5 <2 <3 -- -- --

269 -- -- 0.010 <1 <5 <2 -- -- -- --

270 -- 990 <0.0008 <1 <5 <2 <3 -- -- --

271 -- 1,000 <0.0008 <1 <5 <2 <3 0 0 0

272 -- -- 11.0 <0.001 <0.005 <2 <3 -- -- --

273 98 23.0 <0.0008 <0.5 <5 <2 <3 -- -- --

274 -- 6.90 <0.0008 <1 <2 <2 -- -- -- --

275 -- <20 <0.0008 <0.5 <5 <2 <3 -- -- --

276 -- <20 3.30 <1 <5 <2 <3 28.4 1.57 0

277 -- 49.0 0.032 <1 <5 <2 -- -- -- --

278 -- 32.0 <0.0008 <1 <2 <2 -- 0.004 0 0

279 -- 490 <0.0008 <1 <2 <2 -- 0 0 0

280 -- <5 1.10 <1 <2 <2 -- 7.80 0.007 0

281 -- 64.0 <0.0008 <1 <2 <2 -- 0 0 0

282 -- <5 6.00 <1 3.70 <2 -- 33.9 0.015 0

283 -- <20 0.43 <0.5 8.00 <2 <3 -- -- --

284 -- <20 <0.0008 <0.5 <5 <2 <3 -- -- --

285 17 <20 0.049 <1 <5 <2 -- -- -- --

286 -- 86.0 <0.0008 <1 <5 <2 -- -- -- --

287 -- <20 <0.0008 <0.5 <5 <2 <3 0 0 0

288 123 8.00 0.054 <1 0.30 <2 -- -- -- --

289 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

290 -- 43.0 <0.0008 <1 <5 <2 <3 -- -- --

291 -- 13.0 <0.0008 <1 <5 <2 -- -- -- --

292 -- 5.80 0.001 <1 <5 <2 -- -- -- --

293 -- 36.0 <0.0008 <1 14.0 <2 -- -- -- --

294 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

295 -- 130 <0.0008 <1 <5 <2 -- -- -- --

296 130 4.00 <0.0008 <1 0.30 <2 -- -- -- --

297 31 128 <0.0008 <1 0.20 <2 -- -- -- --

298 138 <20 <0.0008 <1 <5 <2 -- -- -- --

299 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

300 -- 9.30 4.60 <1 <2 <2 -- 41.6 0.017 0.001

301 -- 6.00 6.20 <1 <2 <2 -- 46.3 0.018 0

302 -- -- 0.001 <1 <5 <2 -- -- -- --

303 -- 560 <0.0008 <1 <5 <2 <3 -- -- --

304 -- 67.0 <0.0008 <0.5 <5 <2 <3 -- -- --

305 -- 110 <0.0008 <0.5 <5 <2 <3 0 0 0

306 -- 39.0 <0.0008 <0.5 <5 <2 <3 0.18 0 0

307 -- <20 18.0 <1 <5 <2 -- 69.8 0.026 0

308 980 23.0 <0.0008 <1 <5 <2 <3 -- -- --

309 -- <20 0.21 <1 <5 <2 <3 -- -- --

310 -- <20 2.60 <0.5 11.0 1.90 2.4 -- -- --

311 -- <20 2.70 <1 <5 <2 <3 14.2 0.006 0

312 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

313 -- 18.0 <0.0008 <1 <5 <2 <3 -- -- --

314 -- 29.0 <0.0008 <1 <5 <2 <3 -- -- --

315 -- <5 <0.0008 <1 <2 <2 -- -- -- --

316 -- <5 24.0 <1 <2 <2 -- 96.0 0.032 0

317 -- <20 1.40 <1 <5 <2 <3 -- -- --

318 -- 15.0 <0.0008 <1 <5 <2 -- -- -- --

319 16 <20 <0.0008 <1 <5 <2 <3 0.036 0 0

320 -- 5.70 0.017 <1 <5 <2 -- 0.28 0 0

321 -- 71.0 4.50 <1 <5 <2 -- -- -- --
160 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

322 -- <20 <0.0008 <0.5 <5 <2 <3 0.032 0 0

323 108 78.0 4.34 <1 0.90 <2 -- -- -- --

324 -- 220 0.002 <1 <5 <2 -- 0.032 0 0

325 -- <20 8.90 <1 <5 <2 <3 48.5 0.064 0

326 -- 360 0.29 <1 <5 <2 <3 -- -- --

327 -- 43.0 <0.0008 <0.5 <5 <2 <3 0 0 0

328 22 <20 <0.0008 <0.5 <5 <2 <3 -- -- --

329 -- <20 0.60 <1 <5 <2 <3 -- -- --

330 27 17.0 <0.0008 <1 0.30 <2 -- -- -- --

331 53 7.00 1.71 0.30 0.20 <2 -- -- -- --

332 -- 44.0 0.028 <1 <2 <2 -- 0.17 0 0

333 200 <20 1.60 <0.5 <5 <2 <3 -- -- --

334 -- <20 0.010 <1 <5 <2 -- 0.064 0 0

335 -- <20 0.045 <1 <5 <2 <3 -- -- --

336 -- <20 0.017 <1 <5 <2 <3 -- -- --

337 103 17.0 0.20 <1 0.40 <2 -- -- -- --

338 2,050 <20 5.41 0.60 0.50 <2 -- -- -- --

339 -- 8.00 <0.0008 <1 <5 <2 -- 0 0 0

340 27 4.00 3.62 <1 0.40 <2 -- -- -- --

341 -- -- -- -- -- -- -- -- -- --

342 -- 29.0 -- -- -- -- -- -- -- --

343 -- 26.0 -- -- -- -- -- -- -- --

344 -- 5.80 1.20 <1 <5 <2 -- 0.067 0 0

345 -- -- -- -- -- -- -- 0 0 0

346 -- 87.0 <0.0008 <1 <5 <2 -- 0 0 0

347 41 3.00 0.53 <1 0.20 <2 -- -- -- --

348 -- 14.0 0.33 -- -- -- -- -- -- --

349 259 1,640 <0.0008 <1 <5 <2 -- -- -- --

350 158 51.0 <0.0008 <1 <5 <2 -- -- -- --

351 -- 73.0 -- -- -- -- -- -- -- --

352 -- 45.0 0.50 <1 <5 <2 <3 -- -- --

353 -- 5.20 0.004 <1 <5 <2 -- -- -- --

354 7.6 <20 <0.0008 <1 <5 <2 <3 -- -- --

355 7.2 <20 0.036 <1 <5 <2 <3 -- -- --

356 -- 44.0 <0.0008 <1 <5 <2 -- -- -- --

357 -- 6.90 0.48 <1 <5 <2 -- -- -- --

358 -- <20 1.60 <1 <5 <2 <3 -- -- --

359 -- 120 2.40 <1 <5 <2 <3 36.8 2.43 0.68

360 -- -- -- -- -- -- -- 11.2 0.51 0.16

361 -- <20 2.50 <1 <5 <2 -- 17.0 0.012 0.004

362 -- 5.80 7.70 <1 <5 <2 -- -- -- --

363 -- 11.0 13.0 <1 3.00 <2 -- -- -- --

364 -- 9.40 7.30 <1 <5 <2 -- 75.4 0.028 0

365 -- 19.0 2.80 <1 <5 <2 -- 23.1 0.022 0

366 -- 18.0 <0.0008 <1 <5 <2 -- -- -- --

367 673 <20 36.7 <1 <5 <2 -- -- -- --

368 <200 <20 0.003 <1 0.30 <2 -- -- -- --

369 140 <20 <0.0008 <1 <5 <2 <3 -- -- --

370 -- 9.50 <0.0008 <1 <5 <2 -- -- -- --

371 50 2.00 <0.0008 <1 0.20 <2 -- -- -- --

372 -- 480 0.002 <1 <5 <2 -- -- -- --

373 -- 13.0 0.34 <1 <5 <2 -- -- -- --

374 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

375 81 105 0.49 <1 0.30 <2 -- -- -- --

376 -- -- -- -- -- -- -- 23.0 0.022 0

377 -- <20 2.30 <1 <5 <2 -- -- -- --

378 -- -- <0.0008 <1 <5 <2 -- -- -- --

379 -- -- <0.0008 <1 <5 <2 <3 -- -- --

380 -- 110 <0.0008 <1 <5 <2 <3 0 0 0

381 -- 30.0 <0.0008 <1 <5 <2 -- -- -- --

382 -- 70.0 -- -- -- -- -- -- -- --

383 -- 13.0 <0.0008 <1 <5 <2 -- 0.008 0 0

384 -- 44.0 2.30 <1 <5 <2 -- -- -- --
Appendix 161

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

385 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

386 -- 90.0 0.016 <1 <5 <2 <3 -- -- --

387 -- <20 1.20 <1 <5 <2 <3 25.0 0.010 0

388 248 <20 3.23 <1 0.20 <2 -- -- -- --

389 -- <20 0.11 <1 <5 <2 <3 2.05 0 0

390 -- <20 0.15 <1 <5 <2 <3 2.08 -- --

391 -- <20 <0.0008 <1 <5 <2 -- 0 0 0

392 -- 87.0 <0.0008 <1 <5 <2 -- 4.08 0 0

393 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

394 -- 92.0 <0.0008 <1 <5 <2 -- -- -- --

395 -- 20.0 <0.0008 <1 <5 <2 -- 0.004 0 0

396 -- 10.0 <0.0008 <1 0.20 <2 -- -- -- --

397 -- 26.0 <0.0008 <1 <5 <2 <3 -- -- --

398 -- 11.0 0.001 <1 <5 <2 -- -- -- --

399 -- 24.0 -- -- -- -- -- -- -- --

400 -- 19.0 -- -- -- -- -- -- -- --

401 -- 15.0 7.30 <1 <5 <2 -- 52.4 0.031 0

402 -- <20 0.008 <1 <5 <2 -- 0.039 0 0

403 48 18.0 <0.0008 <1 <5 <2 -- -- -- --

404 56 <20 0.78 <1 <5 <2 -- -- -- --

405 117 40.0 <0.0008 <1 <5 <2 -- -- -- --

406 -- <20 <0.0008 <1 <5 <2 -- 0 0 0

407 63 <20 1.75 <1 <5 <2 -- -- -- --

408 -- -- -- -- -- -- -- -- -- --

409 -- -- -- -- -- -- -- -- -- --

410 -- -- -- -- -- -- -- -- -- --

414 -- -- -- -- -- -- -- -- -- --

415 <100 2.00 -- -- -- -- -- -- -- --

416 <100 2.00 -- -- -- -- -- -- -- --

417 -- -- -- -- -- -- -- -- -- --

418 -- -- -- -- -- -- -- -- -- --

419 <100 1.00 -- -- -- -- -- -- -- --

420 -- -- -- -- -- -- -- -- -- --

428 -- -- <0.0008 <1 <5 <2 <3 -- -- --

429 -- -- <0.0008 <1 3.10 <2 1.600 -- -- --

430 -- -- <0.0008 <1 <5 <2 <3 -- -- --

432 -- -- <0.0008 <1 <5 <2 <3 -- -- --

433 -- -- <0.0008 <1 <5 <2 <3 -- -- --

434 -- -- <0.0008 <1 <5 <2 <3 -- -- --

435 -- -- <0.0008 <1 <5 <2 <3 -- -- --

436 -- -- <0.0008 <1 <5 <2 <3 -- -- --

437 -- -- <0.0008 <1 <1 <2 <3 -- -- --

438 -- -- <0.0008 <0.2 <0.2 <2 <3 -- -- --

439 -- -- <0.0008 <1 <5 <2 -- -- -- --

440 -- -- <0.0008 <0.2 <0.2 <2 0.280 -- -- --

441 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

442 -- 149 -- -- -- -- -- -- -- --

443 -- -- <0.0008 <1 <5 <2 <3 -- -- --

444 -- -- <0.0008 <1 <5 <2 <3 -- -- --

445 -- -- <0.0008 <1 <5 <2 <3 -- -- --

446 -- -- <0.0008 <1 <5 <2 <3 -- -- --

447 -- -- <0.0008 <1 <5 <2 <3 -- -- --

447 -- -- -- -- -- -- -- 0 0 0

448 -- -- <0.0008 <1 <5 <2 <3 -- -- --

448 -- -- -- -- -- -- -- 0 0 0

449 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

450 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

451 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

452 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

453 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

453 -- -- -- -- -- -- -- 0.004 0 0

454 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

454 -- -- -- -- -- -- -- 0.039 0 0
162 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

455 -- -- -- -- -- -- -- -- -- --

456 -- -- -- -- -- -- -- -- -- --

457 -- -- -- -- -- -- -- -- -- --

458 -- -- -- -- -- -- -- -- -- --

459 -- -- -- -- -- -- -- -- -- --

460 -- -- <0.0008 <1 <5 <2 -- -- -- --

461 -- -- 0.002 <1 <5 <2 -- -- -- --

462 -- 7.50 -- -- -- -- -- -- -- --

463 -- -- <0.0008 <1 <5 <2 -- -- -- --

464 -- -- <0.0008 <1 <5 <2 -- -- -- --

465 2,900 <1 -- -- -- -- -- -- -- --

466 -- -- -- -- -- -- -- -- -- --

468 -- -- -- -- -- -- -- -- -- --

469 -- -- 0.008 <1 <5 <2 -- -- -- --

470 -- -- -- -- -- -- -- -- -- --

471 -- -- <0.0008 <1 <5 <2 -- -- -- --

472 -- -- -- -- -- -- -- -- -- --

473 -- -- <0.0008 <1 <5 <2 -- -- -- --

474 -- -- <0.0008 <1 <5 <2 -- -- -- --

475 -- -- <0.0008 <1 <5 <2 -- -- -- --

476 -- 16.2 -- -- -- -- -- -- -- --

477 -- -- -- -- -- -- -- -- -- --

478 -- -- <0.0008 <1 <5 <2 -- -- -- --

479 -- -- 0.10 <1 <5 <2 <3 -- -- --

480 -- -- 1.75 <1 <5 <2 <3 -- -- --

481 -- -- <0.0008 <1 <5 <2 -- -- -- --

482 -- -- <0.0008 <1 <5 <2 -- -- -- --

483 -- -- <0.0008 <1 <5 <2 -- -- -- --

484 -- -- -- -- -- -- -- 0 0 0

485 -- -- <0.0008 <1 <5 <2 <3 -- -- --

486 -- 8.50 0.002 <1 <5 <2 -- -- -- --

487 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

488 -- -- <0.0008 -- -- -- -- -- -- --

489 -- -- -- -- -- -- -- -- -- --

490 -- -- -- -- -- -- -- -- -- --

491 -- -- <0.0008 <1 <2 <2 -- -- -- --

492 -- -- <0.0008 <1 <5 <2 <3 -- -- --

493 -- 21.6 -- -- -- -- -- -- -- --

494 -- -- <0.0008 <1 <2 <2 -- -- -- --

495 -- -- <0.0008 <1 <2 <2 -- -- -- --

496 -- -- <0.0008 <1 <5 <2 -- -- -- --

497 -- -- 0.003 <1 <5 <2 -- -- -- --

498 -- -- <0.0008 <1 <5 <2 -- -- -- --

499 -- -- <0.0008 <1 <5 <2 -- -- -- --

500 -- -- <0.0008 <1 <5 <2 -- -- -- --

501 -- -- <0.0008 <1 <5 <2 <3 -- -- --

502 -- -- <0.0008 <1 <5 <2 <3 -- -- --

503 -- -- <0.0008 <1 <5 <2 <3 -- -- --

504 100 <20 <0.0008 <1 <5 <2 <3 -- -- --

505 140 <20 <0.0008 <1 <5 <2 <3 -- -- --

506 -- 5.60 <0.0008 <1 <5 <2 -- -- -- --

507 -- 20.0 -- -- -- -- -- -- -- --

508 -- -- -- -- -- -- -- -- -- --

509 -- -- -- -- -- -- -- -- -- --

510 -- <20 <0.0008 <1 <5 <2 <3 0.008 -- --

511 -- 6.30 <0.0008 <1 <5 <2 -- -- -- --

512 -- -- -- -- -- -- -- -- -- --

513 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

514 -- 13.0 <0.0008 <1 <2 <2 -- -- -- --

515 34 <20 <0.0008 <1 <5 <2 <3 -- -- --

516 -- 5.80 <0.0008 <1 <5 <2 -- -- -- --

517 -- 24.0 -- -- -- -- -- -- -- --

518 140 <20 <0.0008 <1 <5 <2 <3 -- -- --
Appendix 163

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

519 130 <20 <0.0008 <1 <5 <2 <3 -- -- --

520 260 <20 <0.0008 <1 <5 <2 <3 -- -- --

521 -- 21.0 <0.0008 <1 <5 <2 <3 -- -- --

522 -- 26.0 <0.0008 <1 <5 <2 <3 -- -- --

523 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

524 -- <20 <0.0008 <1 <5 <2 -- -- -- --

525 -- <20 <0.0008 <1 <5 <2 -- -- -- --

526 -- -- -- -- -- -- -- 0 0 0

527 150 <20 <0.0008 <1 <5 <2 <3 -- -- --

528 -- <20 <0.0008 <1 <5 <2 -- -- -- --

529 120 <20 <0.0008 <1 <5 <2 <3 -- -- --

530 -- 18.0 <0.0008 <1 <5 <2 -- 0.004 0 0

531 -- -- <0.0008 <1 <5 <2 -- -- -- --

532 -- 5.00 <0.0008 <1 <5 <2 -- -- -- --

533 -- -- -- -- -- -- -- -- -- --

534 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

535 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

536 160 <20 <0.0008 <1 <5 <2 <3 -- -- --

537 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

538 -- -- <0.0008 <1 <5 <2 -- -- -- --

539 120 <20 <0.0008 <1 <5 <2 <3 -- -- --

540 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

541 -- -- -- -- -- -- -- -- -- --

542 -- 12.0 <0.0008 <1 <5 <2 -- -- -- --

543 160 <20 <0.0008 <1 <5 <2 <3 -- -- --

544 -- -- -- -- -- -- -- -- -- --

558 -- -- -- -- -- -- -- -- -- --

559 <100 <1 -- -- -- -- -- -- -- --

560 -- -- -- -- -- -- -- -- -- --

561 -- -- -- -- -- -- -- -- -- --

562 -- -- <0.0008 <1 <5 <2 <3 -- -- --

563 -- -- -- -- -- -- -- -- -- --

564 -- -- -- -- -- -- -- -- -- --

565 -- -- -- -- -- -- -- -- -- --

566 -- -- -- -- -- -- -- -- -- --

569 -- -- -- -- -- -- -- -- -- --

570 -- -- <0.0008 -- -- -- -- -- -- --

571 -- -- <0.0008 -- -- -- -- -- -- --

572 -- -- -- <0.5 <1 <2 <3 -- -- --

573 -- -- -- -- -- -- -- -- -- --

574 -- -- <0.0008 <0.2 <0.2 <2 <3 -- -- --

575 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

576 -- -- <0.0008 -- -- -- -- -- -- --

577 -- -- <0.0008 -- -- -- -- -- -- --

578 -- -- <0.0008 -- -- -- -- -- -- --

579 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

580 -- -- <0.0008 -- -- -- -- -- -- --

581 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

582 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

583 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

584 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

585 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

586 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

587 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

588 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

589 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

590 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

591 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

592 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

593 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

594 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

595 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

596 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --
164 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

597 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

598 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

599 -- -- <0.0008 <1 <5 <2 <3 -- -- --

600 -- -- <0.0008 <1 <5 <2 <3 -- -- --

601 <200 16.0 <0.0008 <0.5 <5 <2 <3 -- -- --

602 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

603 110 <20 <0.0008 <1 <5 <2 <3 -- -- --

604 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

605 -- 54.0 0.019 <1 <5 <2 <3 0 0 0

606 -- 95.0 0.023 <1 <5 <2 <3 0 0 0

607 -- <20 <0.0008 <1 <5 <2 -- -- -- --

608 -- 67.0 <0.0008 <1 <5 <2 <3 0.047 0 0

609 22 <20 <0.0008 <1 <5 <2 <3 -- -- --

610 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

611 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

612 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

613 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

614 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

615 -- -- -- -- -- -- -- -- -- --

616 -- -- <0.0008 <1 <5 <2 <3 -- -- --

617 -- -- <0.0008 <1 <5 <2 <3 -- -- --

623 -- -- <0.0005 -- -- -- -- -- -- --

624 -- -- 0.001 -- -- -- -- -- -- --

625 -- -- <0.0008 <1 <5 <2 <3 -- -- --

626 -- -- <0.0008 -- -- -- -- -- -- --

627 -- -- <0.0005 -- -- -- -- -- -- --

628 -- -- <0.0008 <1 <5 <2 <3 -- -- --

629 -- -- <0.0008 <1 <5 <2 -- -- -- --

630 -- -- -- -- -- -- -- -- -- --

631 -- -- <0.0008 <1 <5 <2 -- -- -- --

632 -- -- <0.0008 <1 <5 <2 <3 -- -- --

633 -- -- <0.0008 <1 <5 <2 <3 -- -- --

634 -- -- <0.0008 -- -- -- -- -- -- --

635 -- -- <0.0008 <1 <1 <2 <3 -- -- --

636 -- -- <0.0008 <1 <1 <2 <3 -- -- --

637 -- -- <0.0008 <1 <1 <2 <3 -- -- --

638 -- -- <0.0008 <1 <1 <2 <3 -- -- --

639 -- -- <0.0008 -- -- -- -- -- -- --

640 -- -- <0.0008 <1 <5 <2 -- -- -- --

641 -- -- <0.0008 <1 <2 <2 -- -- -- --

642 -- -- <0.0008 <1 <2 <2 -- -- -- --

643 -- -- <0.0008 <1 <5 <2 -- -- -- --

644 -- -- <0.0008 <1 <5 <2 <3 -- -- --

645 -- -- <0.0008 <1 <5 <2 -- -- -- --

646 -- -- <0.0008 <1 <5 <2 <3 -- -- --

647 -- -- <0.0008 <1 <5 <2 <3 -- -- --

649 -- -- <0.0008 <1 <5 <2 <3 -- -- --

650 52 <20 <0.0008 <1 <5 <2 <3 -- -- --

651 52 <20 <0.0008 <1 <5 <2 <3 -- -- --

652 -- -- <0.0008 <1 <5 <2 <3 -- -- --

653 -- -- <0.0008 <1 <5 <2 <3 -- -- --

654 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

655 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

656 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

657 -- -- 0.077 <0.001 <0.005 <0.001 <0.003 -- -- --

658 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

660 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

660 -- -- -- -- -- -- -- 0 0 0

661 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

662 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

663 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

663 -- -- -- -- -- -- -- 0 0 0

664 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --
Appendix 165

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

665 -- -- <0.0008 <1 <1 <2 <3 -- -- --

666 -- -- <0.0008 <1 <1 <2 <3 -- -- --

667 -- -- <0.0008 <1 <1 <2 <3 -- -- --

668 -- -- <0.0008 <1 <1 <2 <3 -- -- --

669 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

670 -- -- <0.0008 <1 <1 <2 <3 -- -- --

671 -- -- <0.0008 <1 <1 <2 <3 -- -- --

672 -- -- <0.0008 <1 <1 <2 <3 -- -- --

673 -- -- <0.0008 <1 <1 <2 <3 -- -- --

674 -- -- <0.0008 <1 <1 <2 <3 -- -- --

675 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

676 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

677 -- 22.0 <0.0008 <0.5 <5 <2 <3 -- -- --

678 140 <20 <0.0008 <1 <5 <2 <3 -- -- --

679 -- <20 0.001 <1 <5 <2 -- -- -- --

680 -- 20.0 <0.0008 <1 <5 <2 -- -- -- --

681 150 <20 <0.0008 <1 <5 <2 <3 -- -- --

682 -- 17.0 <0.0008 <1 <5 <2 -- -- -- --

683 -- -- -- -- -- -- -- -- -- --

684 -- <20 <0.0008 <1 <5 <2 -- -- -- --

685 -- <20 <0.0008 <1 <5 <2 -- -- -- --

686 -- 12.0 <0.0008 <1 <5 <2 -- -- -- --

687 140 <20 0.038 <1 <5 <2 <3 -- -- --

688 -- <20 <0.0008 <1 <5 <2 -- -- -- --

689 -- -- -- -- -- -- -- -- -- --

690 -- 36.0 <0.0008 <1 <5 <2 -- -- -- --

691 <100 <1 -- -- -- -- -- -- -- --

692 390 -- -- -- -- -- -- -- -- --

693 -- -- -- -- -- -- -- -- -- --

694 -- -- <0.0008 <1 <5 <2 <3 -- -- --

695 73 <20 <0.0008 <1 <5 <2 <3 -- -- --

696 -- -- <0.0008 <1 <5 <2 -- -- -- --

699 -- -- <0.0008 <1 <5 <2 -- -- -- --

704 -- -- -- -- -- -- -- -- -- --

706 -- -- -- -- -- -- -- -- -- --

707 -- -- -- -- -- -- -- -- -- --

708 -- -- -- -- -- -- -- -- -- --

709 -- -- -- -- -- -- -- -- -- --

710 -- -- <0.0008 <1 <5 <2 <3 -- -- --

711 -- -- -- -- -- -- -- -- -- --

712 -- -- <0.0008 <1 <5 <2 <3 -- -- --

714 -- -- <0.0008 <1 <5 <2 <3 -- -- --

715 -- -- <0.0008 -- -- -- -- -- -- --

716 -- -- -- -- -- -- -- -- -- --

717 -- -- -- -- -- -- -- -- -- --

718 -- -- -- -- -- -- -- -- -- --

719 -- -- -- <0.5 <1 <2 <3 -- -- --

720 -- -- -- -- -- -- -- -- -- --

721 -- -- <0.0008 <1 <5 <2 <3 -- -- --

722 -- -- 1.30 <1 <5 <2 <3 -- -- --

723 -- -- 0.015 <1 <5 <2 <3 -- -- --

724 -- -- 0.015 <1 <5 <2 <3 -- -- --

725 -- -- 0.001 <1 <5 <2 <3 -- -- --

726 -- -- <0.0008 <1 <5 <2 -- -- -- --

727 -- -- -- -- -- -- -- -- -- --

728 -- -- -- <0.5 <1 <2 <3 -- -- --

729 -- -- -- <0.5 <1 <2 <3 -- -- --

730 -- -- -- <0.5 <1 <2 <3 -- -- --

731 -- -- -- -- -- -- -- -- -- --

732 -- -- -- <0.5 <1 <2 <3 -- -- --

733 -- -- -- -- -- -- -- -- -- --

734 -- -- -- <0.5 <1 <2 <3 -- -- --

735 -- -- -- <0.5 <1 <2 <3 -- -- --
166 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

736 -- -- -- -- -- -- -- -- -- --

737 -- -- -- <0.5 <1 <2 <3 -- -- --

738 -- -- -- -- -- -- -- -- -- --

739 -- -- <0.0008 <0.2 0.31 <2 0.490 -- -- --

740 -- -- -- -- -- -- -- -- -- --

741 -- -- <0.0008 <0.2 <0.2 <2 <3 -- -- --

742 -- -- -- <0.5 <1 <2 <3 -- -- --

743 -- -- <0.0008 -- -- -- -- -- -- --

744 -- -- <0.0008 -- -- -- -- -- -- --

745 -- -- <0.0008 -- -- -- -- -- -- --

746 -- -- <0.0008 -- -- -- -- -- -- --

747 -- -- <0.0008 -- -- -- -- -- -- --

748 -- -- <0.0008 -- -- -- -- -- -- --

749 -- -- <0.0008 -- -- -- -- -- -- --

750 -- -- <0.0008 -- -- -- -- -- -- --

751 -- -- <0.0008 -- -- -- -- -- -- --

752 -- -- <0.0008 -- -- -- -- -- -- --

753 -- -- <0.0008 -- -- -- -- -- -- --

754 -- -- <0.0008 -- -- -- -- -- -- --

755 -- -- <0.0008 -- -- -- -- -- -- --

756 -- -- -- -- -- -- -- -- -- --

757 -- -- -- -- -- -- -- -- -- --

758 -- -- -- -- -- -- -- -- -- --

759 -- -- -- -- -- -- -- -- -- --

760 -- -- <0.0008 -- -- -- -- -- -- --

761 -- -- <0.0008 -- -- -- -- -- -- --

762 -- -- <0.0008 -- -- -- -- -- -- --

763 -- -- <0.0008 -- -- -- -- -- -- --

764 -- -- <0.0008 -- -- -- -- -- -- --

765 -- -- -- -- -- -- -- -- -- --

766 -- -- <0.0008 <1 <5 <2 <3 -- -- --

767 -- -- <0.0008 <1 <5 <2 <3 -- -- --

768 -- -- <0.0008 <1 <5 <2 <3 -- -- --

769 -- -- <0.0008 <1 <5 <2 <3 -- -- --

770 -- -- <0.0008 <1 <5 <2 <3 -- -- --

771 -- -- <0.0008 <1 <5 <2 <3 -- -- --

772 -- -- <0.0008 <1 <5 <2 <3 -- -- --

773 -- -- <0.0008 <1 <5 <2 <3 -- -- --

774 -- -- <0.0008 <1 <5 <2 <3 -- -- --

775 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

776 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

777 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

778 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

779 39 5.00 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

780 33 <1 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

781 210 2.00 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

782 44 <20 <0.0008 <1 <5 <2 <3 -- -- --

783 96 2.00 0.002 <0.5 <0.5 <0.5 <1.5 -- -- --

784 100 2.00 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

785 11 27.0 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

786 140 2.00 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

787 180 0.560 <0.001 <5 <5 <5 -- -- -- --

788 170 1.00 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

789 78 <1 <0.001 <0.5 <0.5 <0.5 <1.5 -- -- --

790 190 0.630 <0.001 <5 <5 <5 -- -- -- --

791 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

792 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

793 178 <20 <0.0008 <1 <5 <2 -- -- -- --

794 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

795 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

796 -- -- -- -- -- -- -- -- -- --

797 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

798 -- <20 <0.0008 <1 <5 <2 <3 0 0 0
Appendix 167

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

799 110 <20 <0.0008 <1 <5 <2 <3 -- -- --

800 -- -- -- -- -- -- -- -- -- --

801 -- -- -- -- -- -- -- -- -- --

802 -- -- 0.23 <1 <5 <2 <3 -- -- --

803 -- -- <0.0008 <1 <5 <2 <3 -- -- --

804 -- -- <0.0005 -- -- -- -- -- -- --

805 -- -- 0.005 -- -- -- -- -- -- --

806 -- -- -- -- -- -- -- -- -- --

807 -- -- 32.5 -- -- -- -- -- -- --

811 -- -- <0.0005 -- -- -- -- -- -- --

812 -- -- <0.0005 -- -- -- -- -- -- --

813 -- -- <0.0005 -- -- -- -- -- -- --

814 -- -- <0.0005 -- -- -- -- -- -- --

815 -- -- <0.0008 <1 <5 <2 <3 -- -- --

816 -- -- <0.0005 -- -- -- -- -- -- --

817 -- -- -- -- -- -- -- -- -- --

818 -- -- <0.0008 <1 <5 <2 <3 -- -- --

819 6.1 160 -- -- -- -- -- -- -- --

820 -- -- <0.0005 -- -- -- -- -- -- --

821 -- -- <0.0008 <1 <5 <2 <3 -- -- --

822 -- -- <0.0008 <1 <5 <2 <3 -- -- --

823 -- -- <0.0008 <1 <5 <2 <3 -- -- --

824 -- -- <0.0008 <1 <5 <2 <3 -- -- --

825 -- -- <0.0008 <1 <5 <2 <3 -- -- --

826 -- -- -- -- -- -- -- -- -- --

827 -- -- <0.0008 <1 <5 <2 <3 -- -- --

828 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

829 -- -- <0.0008 <0.2 <0.2 <2 <3 -- -- --

830 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

831 -- -- -- -- -- -- -- 65.5 0.16 0.010

832 -- -- 0.68 <1 <5 <2 <3 -- -- --

833 -- -- <0.0008 <1 <5 <2 <3 -- -- --

834 -- -- <0.0008 <0.2 <0.2 <2 0.780 -- -- --

835 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

836 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

837 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

838 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

838 -- -- -- -- -- -- -- 0 0 0

839 -- -- <0.0008 -- -- -- -- -- -- --

840 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

840 -- -- -- -- -- -- -- 0 0 0

841 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

842 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

842 -- -- -- -- -- -- -- 0 0 0

843 -- -- <0.0008 -- -- -- -- -- -- --

844 -- -- <0.0008 -- -- -- -- -- -- --

845 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

846 -- 189 -- -- -- -- -- -- -- --

847 -- 39.7 -- -- -- -- -- -- -- --

848 -- -- <0.0008 <1 <5 <2 <3 -- -- --

849 -- -- <0.0008 -- -- -- -- -- -- --

850 -- -- <0.0008 <1 <5 <2 <3 -- -- --

851 -- -- <0.0008 <1 <5 <2 <3 -- -- --

852 -- -- -- <1 <5 <2 <3 -- -- --

853 -- -- -- <1 <5 <2 <3 -- -- --

854 -- -- -- <1 <5 <2 <3 -- -- --

855 -- -- <0.0008 <1 <5 <2 <3 -- -- --

855 -- -- -- -- -- -- -- 0.005 0 0

856 -- -- <0.0008 <1 <5 <2 <3 -- -- --

857 -- -- <0.0008 <1 <5 <2 <3 -- -- --

858 -- -- <0.0008 <1 <5 <2 <3 -- -- --

859 -- -- <0.0008 <1 2.40 <2 <3 -- -- --

860 -- -- <0.0008 <1 <5 <2 <3 -- -- --

860 -- -- -- -- -- -- -- 0.009 0 0
168 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

861 -- -- <0.0008 <1 <5 <2 <3 -- -- --

862 -- -- <0.0008 <1 <5 <2 <3 -- -- --

862 -- -- -- -- -- -- -- 0 0 0

863 -- -- 0.45 <0.5 <5 <2 <3 -- -- --

864 -- -- <0.0008 <1 <5 <2 <3 -- -- --

865 -- -- <0.0008 <1 <5 <2 <3 -- -- --

866 -- -- <0.0008 <1 <5 <2 <3 -- -- --

866 -- -- -- -- -- -- -- 0 0 0

867 -- -- <0.0008 <1 <5 <2 <3 -- -- --

868 -- -- <0.0008 <1 <5 <2 <3 -- -- --

869 -- -- <0.0008 <1 <5 <2 <3 -- -- --

870 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

871 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

872 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

873 -- -- 1.00 <0.001 <0.005 <0.001 <0.003 -- -- --

874 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

875 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

876 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

877 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

878 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

879 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

880 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

881 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

882 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

883 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

884 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

885 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

886 -- -- <0.0008 <1 <5 <2 <3 -- -- --

887 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

888 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

889 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

890 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

891 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

892 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

893 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

894 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

895 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

896 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

897 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

898 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

898 -- -- -- -- -- -- -- 0 0 0

899 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

899 -- -- -- -- -- -- -- 0 0 0

900 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

901 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

902 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

903 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

904 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

905 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

905 -- -- -- -- -- -- -- 0 0 0

906 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

907 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

907 -- -- -- -- -- -- -- 0 0 0

908 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

908 -- -- -- -- -- -- -- 0 0 0

909 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

910 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

911 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

912 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

913 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

913 -- -- -- -- -- -- -- 0.002 0 0

915 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

916 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

916 -- -- -- -- -- -- -- 0 0 0
Appendix 169

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

917 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

918 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

918 -- -- -- -- -- -- -- 0 0 0

919 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

920 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

921 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

922 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

923 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

924 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

924 -- -- -- -- -- -- -- 0 0 0

925 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

925 -- -- -- -- -- -- -- 0 0 0

926 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

927 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

928 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

928 -- -- -- -- -- -- -- 0 0 0

930 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

931 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

932 -- -- 0.085 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

933 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

934 -- -- <0.0008 <0.5 <0.5 <2 <3 -- -- --

934 -- -- -- -- -- -- -- 0 0 0

935 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

936 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

937 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

938 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

939 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

940 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

941 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

942 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

943 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

944 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

945 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

946 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

947 -- -- 0.010 0.001 0.005 0.001 0.003 -- -- --

948 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

949 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

950 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

951 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

952 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

953 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

954 -- -- 0.019 <0.001 <0.005 <0.001 <0.003 -- -- --

955 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

956 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

957 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

958 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

959 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

960 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

961 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

962 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

963 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

964 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

965 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

966 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

967 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

968 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

969 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

970 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

971 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

972 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

973 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

974 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

975 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

976 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --
170 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

977 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

978 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

979 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

980 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

981 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

982 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

983 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

984 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

985 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

986 -- -- 0.017 <0.001 <0.005 <0.001 <0.003 -- -- --

987 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

988 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

989 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

990 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

991 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

992 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

993 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

994 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

995 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

996 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

997 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

998 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

999 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1000 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1001 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1002 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1003 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1004 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1005 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1006 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1007 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1008 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1009 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1010 -- -- <0.01 <0.001 <0.005 <0.001 <0.003 -- -- --

1011 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1012 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1013 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1014 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1015 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1016 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1017 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1018 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1019 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1020 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1021 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1022 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1023 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1024 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1025 -- -- <0.01 <0.0005 <0.005 <0.0005 <0.0015 -- -- --

1026 -- 21.0 <0.0008 <1 <5 <2 <3 -- -- --

1027 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

1028 -- -- -- -- -- -- -- -- -- --

1029 -- -- -- -- -- -- -- -- -- --

1030 -- -- <0.0008 <1 <5 <2 <3 -- -- --

1031 -- -- <0.0008 <1 <5 <2 <3 -- -- --

1032 -- -- <0.0008 <1 <5 <2 <3 -- -- --

1033 -- -- <0.0008 -- -- -- -- -- -- --

1034 8.0 3.00 -- -- -- -- -- -- -- --

1038 -- -- -- -- -- -- -- -- -- --

1039 -- -- -- -- -- -- -- -- -- --

1051 -- -- -- -- -- -- -- -- -- --

1052 -- -- -- -- -- -- -- -- -- --

1053 -- -- -- -- -- -- -- -- -- --

1054 70 <1 -- -- -- -- -- -- -- --
Appendix 171

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1055 -- 6.00 -- -- -- -- -- -- -- --

1057 <100 1.00 -- -- -- -- -- -- -- --

1058 200 -- -- -- -- -- -- -- -- --

1059 1,000 <1 -- -- -- -- -- -- -- --

1062 -- -- -- -- -- -- -- -- -- --

1064 -- -- -- -- -- -- -- -- -- --

1065 -- -- -- -- -- -- -- -- -- --

1066 -- -- -- -- -- -- -- -- -- --

1067 -- -- -- -- -- -- -- -- -- --

1068 -- -- -- -- -- -- -- -- -- --

1069 3,200 <1 -- -- -- -- -- -- -- --

1070 -- -- -- -- -- -- -- -- -- --

1071 30 -- -- -- -- -- -- -- -- --

1073 -- 4.00 -- -- -- -- -- -- -- --

1080 42 -- -- -- -- -- -- -- -- --

1081 5,300 <1 -- -- -- -- -- -- -- --

1084 -- -- -- -- -- -- -- -- -- --

1085 -- 8.00 -- -- -- -- -- -- -- --

1091 -- 8.00 -- -- -- -- -- -- -- --

1094 -- -- -- -- -- -- -- -- -- --

1095 -- -- -- -- -- -- -- -- -- --

1096 -- 6.00 -- -- -- -- -- -- -- --

1099 -- -- -- -- -- -- -- -- -- --

1100 -- 5.00 -- -- -- -- -- -- -- --

1101 -- -- -- -- -- -- -- -- -- --

1107 -- -- -- -- -- -- -- -- -- --

1125 -- -- -- -- -- -- -- -- -- --

1130 -- -- -- -- -- -- -- -- -- --

1141 -- -- -- -- -- -- -- -- -- --

1142 -- 2.00 -- -- -- -- -- -- -- --

1144 -- -- -- -- -- -- -- -- -- --

1146 -- -- -- -- -- -- -- -- -- --

1147 -- -- -- -- -- -- -- -- -- --

1149 -- -- -- -- -- -- -- -- -- --

1153 -- -- -- -- -- -- -- -- -- --

1154 -- -- -- -- -- -- -- -- -- --

1160 -- <1 -- -- -- -- -- -- -- --

1164 -- -- -- -- -- -- -- -- -- --

1173 -- -- -- -- -- -- -- -- -- --

1174 200 <1 -- -- -- -- -- -- -- --

1175 <100 <1 -- -- -- -- -- -- -- --

1176 -- -- -- -- -- -- -- -- -- --

1177 -- -- -- -- -- -- -- -- -- --

1178 -- 6.00 -- -- -- -- -- -- -- --

1182 -- <1 -- -- -- -- -- -- -- --

1185 -- <1 -- -- -- -- -- -- -- --

1186 -- <1 -- -- -- -- -- -- -- --

1187 -- -- -- -- -- -- -- -- -- --

1188 60 <20 -- -- -- -- -- -- -- --

1189 500 <1 -- -- -- -- -- -- -- --

1190 58 -- -- -- -- -- -- -- -- --

1191 40 1.00 -- -- -- -- -- -- -- --

1192 43 -- -- -- -- -- -- -- -- --

1193 120 -- -- -- -- -- -- -- -- --

1194 1,100 -- -- -- -- -- -- -- -- --

1195 600 -- -- -- -- -- -- -- -- --

1196 50 1.00 -- -- -- -- -- -- -- --

1197 -- -- -- -- -- -- -- -- -- --

1198 <100 <1 -- -- -- -- -- -- -- --

1199 25 -- -- -- -- -- -- -- -- --

1200 <100 -- -- -- -- -- -- -- -- --

1201 -- -- -- -- -- -- -- -- -- --

1202 -- -- -- -- -- -- -- -- -- --

1203 1,100 <1 -- -- -- -- -- -- -- --
172 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1204 -- -- -- -- -- -- -- -- -- --

1205 1,200 2.00 -- -- -- -- -- -- -- --

1206 900 -- -- -- -- -- -- -- -- --

1207 100 -- -- -- -- -- -- -- -- --

1208 45 -- -- -- -- -- -- -- -- --

1209 26 -- -- -- -- -- -- -- -- --

1210 90 1.00 -- -- -- -- -- -- -- --

1211 40 1.00 -- -- -- -- -- -- -- --

1213 800 1.00 -- -- -- -- -- -- -- --

1230 36 -- -- -- -- -- -- -- -- --

1237 -- 1.00 -- -- -- -- -- -- -- --

1239 <100 <1 -- -- -- -- -- -- -- --

1244 -- -- -- -- -- -- -- -- -- --

1250 -- -- -- -- -- -- -- -- -- --

1251 -- -- -- -- -- -- -- -- -- --

1252 -- -- -- -- -- -- -- -- -- --

1253 -- -- -- -- -- -- -- -- -- --

1254 -- -- -- -- -- -- -- -- -- --

1256 -- -- -- -- -- -- -- -- -- --

1260 -- -- -- -- -- -- -- -- -- --

1265 -- -- -- -- -- -- -- -- -- --

1267 -- -- -- -- -- -- -- -- -- --

1272 -- -- -- -- -- -- -- -- -- --

1273 -- -- -- -- -- -- -- -- -- --

1277 -- 1.00 -- -- -- -- -- -- -- --

1282 -- -- -- -- -- -- -- -- -- --

1297 -- -- -- -- -- -- -- -- -- --

1302 -- -- -- -- -- -- -- -- -- --

1305 -- 7.00 -- -- -- -- -- -- -- --

1306 -- -- -- -- -- -- -- -- -- --

1307 -- -- -- -- -- -- -- -- -- --

1317 -- -- -- -- -- -- -- -- -- --

1318 -- -- -- -- -- -- -- -- -- --

1321 2,900 -- -- -- -- -- -- -- -- --

1327 -- -- -- -- -- -- -- -- -- --

1328 -- -- -- -- -- -- -- -- -- --

1329 -- -- -- -- -- -- -- -- -- --

1330 -- -- -- -- -- -- -- -- -- --

1333 -- -- -- -- -- -- -- -- -- --

1369 -- -- -- -- -- -- -- -- -- --

1371 -- -- -- -- -- -- -- -- -- --

1381 -- -- -- -- -- -- -- -- -- --

1382 -- -- -- -- -- -- -- -- -- --

1383 -- -- -- -- -- -- -- -- -- --

1387 -- -- -- -- -- -- -- -- -- --

1388 -- -- -- -- -- -- -- -- -- --

1389 -- -- -- -- -- -- -- -- -- --

1390 -- -- -- -- -- -- -- -- -- --

1391 -- -- -- -- -- -- -- -- -- --

1392 -- -- -- -- -- -- -- -- -- --

1393 -- -- -- -- -- -- -- -- -- --

1395 -- -- -- -- -- -- -- -- -- --

1403 -- -- -- -- -- -- -- -- -- --

1409 -- -- -- -- -- -- -- -- -- --

1410 -- 20.0 -- -- -- -- -- -- -- --

1411 -- -- -- -- -- -- -- -- -- --

1415 -- -- -- -- -- -- -- -- -- --

1416 -- -- -- -- -- -- -- -- -- --

1418 -- <1 -- -- -- -- -- -- -- --

1419 -- -- -- -- -- -- -- -- -- --

1420 -- -- -- -- -- -- -- -- -- --

1421 <100 <20 -- -- -- -- -- -- -- --

1422 -- <20 -- -- -- -- -- -- -- --

1423 600 -- -- -- -- -- -- -- -- --
Appendix 173

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1426 <100 <1 -- -- -- -- -- -- -- --

1433 -- 4.00 -- -- -- -- -- -- -- --

1438 -- <1 -- -- -- -- -- -- -- --

1443 -- 3.00 -- -- -- -- -- -- -- --

1445 -- 4.00 -- -- -- -- -- -- -- --

1448 -- 4.00 -- -- -- -- -- -- -- --

1450 -- 5.00 -- -- -- -- -- -- -- --

1452 -- 5.00 -- -- -- -- -- -- -- --

1454 43 -- -- -- -- -- -- -- -- --

1461 -- -- -- -- -- -- -- -- -- --

1463 -- -- -- -- -- -- -- -- -- --

1464 -- -- -- -- -- -- -- -- -- --

1465 -- -- -- -- -- -- -- -- -- --

1466 700 <1 -- -- -- -- -- -- -- --

1467 <100 <1 -- -- -- -- -- -- -- --

1468 <100 <1 -- -- -- -- -- -- -- --

1469 100 <20 -- -- -- -- -- -- -- --

1475 21 <1 -- 10.0 <3 <3 <3 -- -- --

1476 41 <1 -- 43.0 <3 <3 <3 -- -- --

1477 <100 <1 -- -- -- -- -- -- -- --

1478 -- -- -- -- -- -- -- -- -- --

1480 -- -- -- -- -- -- -- -- -- --

1482 -- -- -- -- -- -- -- -- -- --

1484 <100 <1 -- -- -- -- -- -- -- --

1486 300 <1 -- -- -- -- -- -- -- --

1487 -- <1 -- -- -- -- -- -- -- --

1488 <100 <1 -- -- -- -- -- -- -- --

1492 -- -- -- -- -- -- -- -- -- --

1497 -- -- -- -- -- -- -- -- -- --

1498 -- <1 -- -- -- -- -- -- -- --

1499 <200 1.00 -- -- -- -- -- -- -- --

1502 400 <1 -- -- -- -- -- -- -- --

1506 -- -- -- -- -- -- -- -- -- --

1507 -- -- -- -- -- -- -- -- -- --

1508 -- -- -- -- -- -- -- -- -- --

1509 -- -- -- -- -- -- -- -- -- --

1510 -- -- -- -- -- -- -- -- -- --

1512 31 <1 -- -- -- -- -- -- -- --

1513 -- <20 -- -- -- -- -- -- -- --

1514 426 0.638 -- -- -- -- -- -- -- --

1515 649 1.22 -- -- -- -- -- -- -- --

1516 4,841 <0.7 -- -- -- -- -- -- -- --

1517 1,786 <15 -- -- -- -- -- -- -- --

1518 <200 <1 -- -- -- -- -- -- -- --

1519 <100 <1 -- -- -- -- -- -- -- --

1523 -- 3.00 -- -- -- -- -- -- -- --

1526 -- 7.00 -- -- -- -- -- -- -- --

1530 -- <1 -- -- -- -- -- -- -- --

1532 -- 9.00 -- -- -- -- -- -- -- --

1535 15 2.04 -- -- -- -- -- -- -- --

1536 -- 4.00 -- -- -- -- -- -- -- --

1538 423 <0.7 -- -- -- -- -- -- -- --

1539 1,474 <20 -- -- -- -- -- -- -- --

1539 1,403 <20 -- -- -- -- -- -- -- --

1540 134 3.79 -- -- -- -- -- -- -- --

1541 2,437 <2 -- -- -- -- -- -- -- --

1542 56 <5 -- -- -- -- -- -- -- --

1546 55 <1 -- -- -- -- -- -- -- --

1547 420 <1 -- -- -- -- -- -- -- --

1549 -- 5.00 -- -- -- -- -- -- -- --

1552 -- 6.00 -- -- -- -- -- -- -- --

1555 -- -- -- -- -- -- -- -- -- --

1558 -- -- -- -- -- -- -- -- -- --

1559 -- -- -- -- -- -- -- -- -- --
174 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1560 -- -- -- -- -- -- -- -- -- --

1561 -- -- -- -- -- -- -- -- -- --

1565 -- -- -- -- -- -- -- -- -- --

1566 -- -- -- -- -- -- -- -- -- --

1567 -- -- -- -- -- -- -- -- -- --

1568 -- -- -- -- -- -- -- -- -- --

1571 -- -- -- -- -- -- -- -- -- --

1576 -- 2.00 -- -- -- -- -- -- -- --

1580 -- -- -- -- -- -- -- -- -- --

1581 <100 <20 -- -- -- -- -- -- -- --

1587 -- 2.00 -- -- -- -- -- -- -- --

1592 -- -- -- -- -- -- -- -- -- --

1593 -- -- -- -- -- -- -- -- -- --

1594 -- -- -- -- -- -- -- -- -- --

1595 -- -- -- -- -- -- -- -- -- --

1596 -- -- -- -- -- -- -- -- -- --

1597 -- -- -- -- -- -- -- -- -- --

1598 -- 5.00 -- -- -- -- -- -- -- --

1599 -- -- -- -- -- -- -- -- -- --

1600 -- -- -- -- -- -- -- -- -- --

1601 -- -- -- -- -- -- -- -- -- --

1602 -- -- -- -- -- -- -- -- -- --

1603 <100 <1 -- -- -- -- -- -- -- --

1604 900 <1 -- -- -- -- -- -- -- --

1605 1,200 <1 -- -- -- -- -- -- -- --

1607 -- 2.00 -- -- -- -- -- -- -- --

1609 -- 7.00 -- -- -- -- -- -- -- --

1610 -- -- -- -- -- -- -- -- -- --

1612 -- 7.00 -- -- -- -- -- -- -- --

1613 42 <1 -- -- -- -- -- -- -- --

1614 410 <1 -- -- -- -- -- -- -- --

1617 -- 5.00 -- -- -- -- -- -- -- --

1622 <100 1.00 -- -- -- -- -- -- -- --

1623 <100 1.00 -- -- -- -- -- -- -- --

1626 -- 2.00 -- -- -- -- -- -- -- --

1628 -- 3.00 -- -- -- -- -- -- -- --

1631 -- -- -- -- -- -- -- -- -- --

1632 -- -- -- -- -- -- -- -- -- --

1633 -- 61.0 -- -- -- -- -- -- -- --

1634 -- 9.00 -- -- -- -- -- -- -- --

1635 -- <4.8 -- -- -- -- -- -- -- --

1636 -- 21.6 -- -- -- -- -- -- -- --

1639 -- -- -- -- -- -- -- -- -- --

1640 -- 2.79 -- -- -- -- -- -- -- --

1641 -- 2.13 -- -- -- -- -- -- -- --

1642 -- 1.75 -- -- -- -- -- -- -- --

1643 -- 24.0 -- -- -- -- -- -- -- --

1644 -- -- -- -- -- -- -- -- -- --

1645 -- <2.4 -- -- -- -- -- -- -- --

1646 -- -- -- -- -- -- -- -- -- --

1647 -- -- -- -- -- -- -- -- -- --

1648 -- 9.60 -- -- -- -- -- -- -- --

1649 -- -- -- -- -- -- -- -- -- --

1650 -- -- -- -- -- -- -- -- -- --

1651 -- 71.4 -- -- -- -- -- -- -- --

1652 19 50.8 -- -- -- -- -- -- -- --

1653 33 <1 -- -- -- -- -- -- -- --

1654 -- 32.0 -- -- -- -- -- -- -- --

1655 -- -- -- -- -- -- -- -- -- --

1656 -- -- -- -- -- -- -- -- -- --

1657 -- -- -- -- -- -- -- -- -- --

1658 -- -- -- -- -- -- -- -- -- --

1659 -- -- -- -- -- -- -- -- -- --

1660 -- -- -- -- -- -- -- -- -- --
Appendix 175

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1661 -- -- -- -- -- -- -- -- -- --

1662 -- -- -- -- -- -- -- -- -- --

1664 -- -- <0.0008 -- -- -- -- -- -- --

1665 -- -- <0.0008 -- -- -- -- -- -- --

1666 -- -- <0.0008 <1 <5 <2 -- -- -- --

1667 -- -- <0.0008 <1 <5 <2 -- -- -- --

1668 -- -- 0.094 <1 <5 <2 -- -- -- --

1669 -- -- -- -- -- -- -- -- -- --

1670 -- -- -- -- -- -- -- -- -- --

1671 -- 4.00 -- -- -- -- -- -- -- --

1672 -- -- -- -- -- -- -- -- -- --

1673 -- 2.00 -- -- -- -- -- -- -- --

1674 -- 2.40 -- -- -- -- -- -- -- --

1675 -- 7.20 -- -- -- -- -- -- -- --

1676 -- -- -- -- -- -- -- -- -- --

1677 -- 11.0 -- -- -- -- -- -- -- --

1678 -- <1 -- -- -- -- -- -- -- --

1679 -- 2.72 -- -- -- -- -- -- -- --

1680 -- 2.75 -- -- -- -- -- -- -- --

1681 -- 1.60 -- -- -- -- -- -- -- --

1682 -- -- -- -- -- -- -- -- -- --

1683 -- 1.59 -- -- -- -- -- -- -- --

1684 -- -- -- -- -- -- -- -- -- --

1685 -- -- -- -- -- -- -- -- -- --

1686 -- 6.34 -- -- -- -- -- -- -- --

1687 -- -- -- -- -- -- -- -- -- --

1688 -- -- -- -- -- -- -- -- -- --

1689 -- 1.00 -- -- -- -- -- -- -- --

1690 -- <1 -- -- -- -- -- -- -- --

1691 -- -- -- -- -- -- -- -- -- --

1692 -- -- -- -- -- -- -- -- -- --

1693 -- <1 -- -- -- -- -- -- -- --

1694 -- -- -- -- -- -- -- -- -- --

1695 -- -- -- -- -- -- -- -- -- --

1696 -- 160 -- -- -- -- -- -- -- --

1697 -- -- -- -- -- -- -- -- -- --

1699 -- -- -- -- -- -- -- -- -- --

1700 -- 280 -- -- -- -- -- -- -- --

1701 -- -- -- -- -- -- -- -- -- --

1702 -- <1 -- -- -- -- -- -- -- --

1703 -- -- -- -- -- -- -- -- -- --

1704 -- -- -- -- -- -- -- -- -- --

1705 -- -- -- -- -- -- -- -- -- --

1706 -- -- -- -- -- -- -- -- -- --

1707 -- 190 -- -- -- -- -- -- -- --

1708 -- 47.0 -- -- -- -- -- -- -- --

1709 -- <1 -- -- -- -- -- -- -- --

1710 -- -- -- -- -- -- -- -- -- --

1711 -- -- -- -- -- -- -- -- -- --

1712 -- -- -- -- -- -- -- -- -- --

1713 -- 30.6 -- -- -- -- -- -- -- --

1714 -- 39.0 -- -- -- -- -- -- -- --

1715 -- -- -- -- -- -- -- -- -- --

1716 -- -- -- -- -- -- -- -- -- --

1723 <100 6.00 -- -- -- -- -- -- -- --

1727 -- -- -- -- -- -- -- -- -- --

1728 -- -- -- -- -- -- -- -- -- --

1730 -- -- -- -- -- -- -- -- -- --

1731 -- -- -- -- -- -- -- -- -- --

1732 -- <1 -- -- -- -- -- -- -- --

1733 60 <20 -- -- -- -- -- -- -- --

1734 -- 0.713 -- -- -- -- -- -- -- --

1735 -- 1.40 -- -- -- -- -- -- -- --
176 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1736 -- <0.7 -- -- -- -- -- -- -- --

1738 -- -- -- -- -- -- -- -- -- --

1741 -- -- -- -- -- -- -- -- -- --

1742 -- -- -- -- -- -- -- -- -- --

1743 -- -- -- -- -- -- -- -- -- --

1744 -- -- -- -- -- -- -- -- -- --

1745 -- -- <0.0008 -- -- -- -- -- -- --

1747 -- -- -- -- -- -- -- -- -- --

1752 -- <20 0.015 <1 <5 <2 <3 0 0 0

1753 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

1754 -- -- -- -- -- -- -- 0 0 0

1755 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

1756 -- <20 <0.0008 <1 <5 <2 <3 0.042 0 0

1757 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

1758 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

1759 -- <20 <0.0008 <1 <5 <2 <3 0.025 0.008 0

1760 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

1761 154 <5 -- -- -- -- -- -- -- --

1762 -- -- -- -- -- -- -- -- -- --

1763 -- -- -- -- -- -- -- -- -- --

1765 -- 3.00 -- -- -- -- -- -- -- --

1766 -- 1,000 -- -- -- -- -- -- -- --

1768 -- 2.00 -- -- -- -- -- -- -- --

1769 -- 35.0 -- -- -- -- -- -- -- --

1770 -- -- -- -- -- -- -- -- -- --

1771 -- -- -- -- -- -- -- -- -- --

1772 -- -- -- -- -- -- -- -- -- --

1773 -- -- <0.0008 -- -- -- -- -- -- --

1774 -- -- 0.21 <0.4 <0.4 <2 <3 -- -- --

1776 -- -- <0.0008 -- -- -- -- -- -- --

1777 -- -- <0.0008 -- -- -- -- -- -- --

1778 -- -- <0.0008 -- -- -- -- -- -- --

1779 -- -- <0.0008 -- -- -- -- -- -- --

1780 -- -- <0.0008 -- -- -- -- -- -- --

1781 -- -- <0.0008 -- -- -- -- -- -- --

1782 -- -- 0.001 <1 <5 <2 -- -- -- --

1783 -- -- 0.060 <1 <5 <2 -- -- -- --

1784 -- -- 0.11 <1 <5 <2 -- -- -- --

1785 -- -- <0.0008 <1 <5 <2 -- -- -- --

1786 -- -- <0.0008 <1 <5 <2 -- -- -- --

1787 -- -- -- -- -- -- -- -- -- --

1788 -- 41.0 <0.0008 <1 <5 <2 -- -- -- --

1789 -- -- -- -- -- -- -- -- -- --

1790 -- -- -- -- -- -- -- -- -- --

1791 -- -- -- -- -- -- -- -- -- --

1792 -- -- -- -- -- -- -- -- -- --

1793 -- -- -- -- -- -- -- -- -- --

1794 -- -- -- -- -- -- -- -- -- --

1795 -- -- -- -- -- -- -- -- -- --

1796 -- -- <0.0008 -- -- -- -- -- -- --

1797 -- -- <0.0008 -- -- -- -- -- -- --

1798 -- -- <0.0008 -- -- -- -- -- -- --

1799 -- -- <0.0008 -- -- -- -- -- -- --

1800 -- -- <0.0008 -- -- -- -- -- -- --

1801 -- -- <0.0008 -- -- -- -- -- -- --

1802 -- -- <0.0008 -- -- -- -- -- -- --

1803 -- -- <0.0008 -- -- -- -- -- -- --

1804 -- -- <0.0008 -- -- -- -- -- -- --

1805 -- -- <0.0008 -- -- -- -- -- -- --

1806 -- -- <0.0008 -- -- -- -- -- -- --

1807 -- -- 26.0 <1 <2 <2 -- -- -- --

1807 -- -- -- -- -- -- -- 79.9 2.54 0.48

1808 -- -- 0.002 <1 <5 <2 -- -- -- --
Appendix 177

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1809 -- -- <0.0008 <1 <5 <2 -- -- -- --

1810 -- -- <0.0008 <1 <5 <2 -- -- -- --

1811 -- <20 0.012 <1 <5 <2 <3 0 0 0

1812 -- 23.0 0.27 <1 <5 <2 <3 0 0 0

1813 -- <20 <0.0008 <1 <5 <2 -- 0.010 0 0

1814 -- <20 <0.0008 <1 <5 <2 <3 0.004 0 0

1815 -- -- -- -- -- -- -- -- -- --

1816 -- 32.0 <0.0008 <1 <5 <2 <3 0 0 0

1817 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

1818 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

1819 -- -- -- -- -- -- -- -- -- --

1820 -- <20 <0.0008 <1 <5 <2 <3 -- -- --

1821 -- <20 <0.0008 <1 <5 <2 <3 0.018 0 0

1822 -- <20 <0.0008 <1 <5 <2 <3 0 0 0

1827 184 <1 -- -- -- -- -- -- -- --

1828 234 <1 -- -- -- -- -- -- -- --

1829 -- -- -- -- -- -- -- -- -- --

1830 -- -- -- -- -- -- -- -- -- --

1832 -- -- <0.0008 -- -- -- -- -- -- --

1833 -- -- -- -- -- -- -- -- -- --

1837 <100 6.00 -- -- -- -- -- -- -- --

1842 -- 69.4 -- -- -- -- -- -- -- --

1843 -- 3.94 -- -- -- -- -- -- -- --

1845 -- -- -- -- -- -- -- -- -- --

1847 -- 6.74 -- -- -- -- -- -- -- --

1855 -- -- <0.0008 <1 <5 <2 -- -- -- --

1856 -- -- <0.0008 <1 <5 <2 -- -- -- --

1857 -- -- <0.0008 <1 <5 <2 -- -- -- --

1858 -- -- 0.002 <1 <5 <2 -- -- -- --

1859 -- -- 0.007 <1 <5 <2 -- -- -- --

1860 -- -- 0.056 <1 <5 <2 -- -- -- --

1861 -- -- <0.0008 <1 <5 <2 -- -- -- --

1862 -- -- <0.0008 <1 <2 <2 -- -- -- --

1863 -- -- <0.0008 <1 <2 <2 -- -- -- --

1864 -- 49.0 -- -- -- -- -- -- -- --

1865 -- -- -- -- -- -- -- -- -- --

1866 -- -- -- -- -- -- -- -- -- --

1867 -- 21.0 -- -- -- -- -- -- -- --

1868 -- 85.0 -- -- -- -- -- -- -- --

1869 -- 57.0 -- -- -- -- -- -- -- --

1870 -- 238 -- -- -- -- -- -- -- --

1871 -- 1.60 -- -- -- -- -- -- -- --

1872 -- 1.30 -- -- -- -- -- -- -- --

1873 -- 14.0 -- -- -- -- -- -- -- --

1874 -- -- -- -- -- -- -- -- -- --

1875 -- 25.0 -- -- -- -- -- -- -- --

1876 -- 32.0 -- -- -- -- -- -- -- --

1877 -- 5.00 -- -- -- -- -- -- -- --

1878 -- 5.00 -- -- -- -- -- -- -- --

1879 -- 7.00 -- -- -- -- -- -- -- --

1880 -- 16.0 -- -- -- -- -- -- -- --

1881 -- 5.00 -- -- -- -- -- -- -- --

1882 -- -- -- -- -- -- -- -- -- --

1883 -- 8.00 -- -- -- -- -- -- -- --

1884 -- -- -- -- -- -- -- -- -- --

1885 -- -- -- -- -- -- -- -- -- --

1886 -- -- -- -- -- -- -- -- -- --

1887 -- -- -- -- -- -- -- -- -- --

1888 -- -- -- -- -- -- -- -- -- --

1889 -- 14.0 -- -- -- -- -- -- -- --

1890 -- -- -- -- -- -- -- -- -- --

1891 60 1.00 -- -- -- -- -- -- -- --

1895 50 <20 -- -- -- -- -- -- -- --
178 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

1896 100 2.00 -- -- -- -- -- -- -- --

1897 100 16.0 -- -- -- -- -- -- -- --

1898 80 9.00 -- -- -- -- -- -- -- --

1899 90 <20 -- -- -- -- -- -- -- --

1900 400 3.00 -- -- -- -- -- -- -- --

1904 -- 1.00 -- -- -- -- -- -- -- --

1906 -- -- -- -- -- -- -- -- -- --

1907 80 <20 -- -- -- -- -- -- -- --

1908 -- -- -- -- -- -- -- -- -- --

1909 -- -- <0.0008 <1 <5 <2 -- -- -- --

1910 -- -- 0.011 <1 <5 <2 -- -- -- --

1911 -- -- -- -- -- -- -- -- -- --

1912 -- -- -- -- -- -- -- -- -- --

1913 -- -- -- -- -- -- -- -- -- --

1914 -- -- -- -- -- -- -- -- -- --

1915 -- -- -- -- -- -- -- -- -- --

1916 -- -- -- -- -- -- -- -- -- --

1917 -- -- -- -- -- -- -- -- -- --

1918 -- -- -- -- -- -- -- -- -- --

1919 -- -- <0.0008 <1 <5 <2 -- -- -- --

1920 -- -- <0.0008 <1 <5 <2 -- -- -- --

1921 -- -- <0.0008 <1 <5 <2 -- -- -- --

1925 -- 4.00 -- -- -- -- -- -- -- --

1926 -- 22.0 -- -- -- -- -- -- -- --

1928 -- 21.0 -- -- -- -- -- -- -- --

1930 -- -- -- -- -- -- -- -- -- --

1931 -- -- -- -- -- -- -- -- -- --

1932 -- -- -- -- -- -- -- -- -- --

1937 -- -- <0.0008 <1 <5 -- -- -- -- --

1938 -- -- <0.0008 <1 <5 <2 -- -- -- --

1939 -- -- 0.094 <1 <5 <2 -- -- -- --

1940 -- -- -- -- -- -- -- -- -- --

1941 -- -- -- -- -- -- -- -- -- --

1942 -- -- -- -- -- -- -- -- -- --

1943 -- -- -- -- -- -- -- -- -- --

1944 -- -- -- -- -- -- -- -- -- --

1945 -- -- -- -- -- -- -- -- -- --

1946 -- -- 0.004 <1 <5 <2 -- -- -- --

1947 -- -- 0.006 <1 <5 <2 -- -- -- --

1951 -- -- -- -- -- -- -- -- -- --

1955 2,100 <1 -- -- -- -- -- -- -- --

1962 <100 <1 -- -- -- -- -- -- -- --

1967 -- -- 0.002 <1 <5 <2 -- -- -- --

1968 -- -- <0.0008 <1 <5 <2 -- -- -- --

1969 -- -- 0.066 <1 <5 <2 -- -- -- --

1970 -- -- 0.007 <1 <5 <2 -- -- -- --

1971 -- -- <0.0008 <1 <5 <2 -- -- -- --

1972 -- -- 0.38 <1 <5 <2 -- -- -- --

1973 -- -- <0.0008 <1 <5 <2 -- -- -- --

1974 -- -- <0.0008 <1 <5 <2 -- -- -- --

1975 -- -- -- -- -- -- -- -- -- --

1976 -- -- -- -- -- -- -- -- -- --

1978 90 2.00 -- -- -- -- -- -- -- --

1981 -- 4.59 -- -- -- -- -- -- -- --

1982 -- 1.06 -- -- -- -- -- -- -- --

1983 -- -- -- -- -- -- -- -- -- --

1986 36 20.1 -- -- -- -- -- -- -- --

1990 -- -- -- -- -- -- -- -- -- --

1993 -- -- -- -- -- -- -- -- -- --

1995 -- -- -- -- -- -- -- -- -- --

1996 -- -- -- -- -- -- -- -- -- --

2001 -- -- -- -- -- -- -- -- -- --

2002 -- 2.00 -- -- -- -- -- -- -- --
Appendix 179

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Barium,

dissolved

(ug/L)

Selenium,

dissolved

(ug/L)

Methane

(mg/L)

Benzene

(ug/L)

Toluene

(ug/L)

Ethylbenzene

(ug/L)

Xylene

(all isomers)

(ug/L)

Methane

(mol %)

Ethane

(mol %)

Propane

(mol %)

2003 -- -- -- -- -- -- -- -- -- --

2011 -- -- -- -- -- -- -- -- -- --

2012 -- -- -- -- -- -- -- -- -- --

2013 -- -- -- -- -- -- -- -- -- --

2014 -- 31.0 -- -- -- -- -- -- -- --

2015 -- -- <0.0008 <1 <2 <2 -- -- -- --

2016 -- -- -- -- -- -- -- -- -- --

2017 -- -- -- -- -- -- -- -- -- --

2018 -- -- -- -- -- -- -- -- -- --

2019 -- -- -- -- -- -- -- -- -- --

2020 -- -- -- -- -- -- -- -- -- --

2021 -- -- -- -- -- -- -- -- -- --

2022 -- -- -- -- -- -- -- -- -- --

2023 -- -- -- -- -- -- -- -- -- --

2024 -- -- -- -- -- -- -- -- -- --

2025 -- -- -- -- -- -- -- -- -- --

2027 -- 25.0 -- -- -- -- -- -- -- --

2029 -- -- -- -- -- -- -- -- -- --

2030 -- -- -- -- -- -- -- -- -- --

2033 -- <1 -- -- -- -- -- -- -- --

2034 -- -- -- -- -- -- -- -- -- --

2035 -- -- -- -- -- -- -- -- -- --

2037 -- -- -- -- -- -- -- -- -- --

2040 -- -- -- -- -- -- -- -- -- --

2041 20 <20 -- -- -- -- -- -- -- --

2044 -- -- -- -- -- -- -- -- -- --

2046 -- <1 -- -- -- -- -- -- -- --

2046 -- <1 -- -- -- -- -- -- -- --

2049 -- -- -- -- -- -- -- -- -- --

2050 -- -- -- -- -- -- -- -- -- --

2051 -- -- -- -- -- -- -- -- -- --

2052 -- -- -- -- -- -- -- -- -- --

2053 -- -- -- -- -- -- -- -- -- --

2054 -- -- -- -- -- -- -- -- -- --

2055 -- -- -- -- -- -- -- -- -- --

2056 -- -- -- -- -- -- -- -- -- --

2058 -- -- -- -- -- -- -- -- -- --

2061 -- 22.0 -- -- -- -- -- -- -- --

2063 -- -- -- -- -- -- -- -- -- --

2064 -- -- -- -- -- -- -- -- -- --

2065 -- -- -- -- -- -- -- -- -- --

2066 -- -- -- -- -- -- -- -- -- --

2067 -- -- -- -- -- -- -- -- -- --

2068 -- -- -- -- -- -- -- -- -- --

2069 -- -- -- -- -- -- -- -- -- --

2070 -- -- -- -- -- -- -- -- -- --

2071 -- -- -- -- -- -- -- -- -- --

2072 -- -- -- -- -- -- -- -- -- --

2076 -- 24.9 -- -- -- -- -- -- -- --

2077 -- -- -- -- -- -- -- 66.1 0.47 0.013

2078 -- -- -- -- -- -- -- -- -- --

2079 -- -- -- -- -- -- -- -- -- --

2080 -- -- -- -- -- -- -- -- -- --

2082 -- -- -- -- -- -- -- -- -- --

2083 -- -- -- -- -- -- -- -- -- --

2084 -- -- -- -- -- -- -- -- -- --

2085 -- <1 -- -- -- -- -- -- -- --

2088 -- -- -- -- -- -- -- -- -- --

2089 -- -- -- -- -- -- -- -- -- --

2090 -- -- -- -- -- -- -- -- -- --

2091 -- -- -- -- -- -- -- -- -- --

2094 -- -- -- -- -- -- -- -- -- --

2095 -- -- -- -- -- -- -- -- -- --

2096 -- -- -- -- -- -- -- -- -- --
180 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1 -- -- -- --

2 -- -- -- --

3 -- -- -- --

4 -- -- -- --

5 -- -- -- --

6 -- -- -- --

8 -- -- -- --

9 -- -- -- --

13 -- -- -- --

14 -- -- -- --

15 -- -- -- --

16 -- -- -- --

17 -- -- -- --

18 -- -- -- --

19 -- -- -- --

20 -- -- -- --

21 -- -- -- --

22 -- -- -- --

23 -- -- -- --

24 -- -- -- --

25 -- -- -- --

26 -- -- -- --

27 -- -- -- --

28 -- -- -- --

29 -- -- -- --

30 -- -- -- --

31 -- -- -- --

33 -- -- -- --

34 -- -- -- --

36 -- -- -- --

38 -- -- -- --

39 -- -- -- --

40 -- -- -- --

41 -- -- -- --

42 -- -- -- --

43 -- -- -- --

44 -- -- -- --

45 -- -- -- --

46 -- -- -- --

47 -- -- -- --

48 -- -- -- --

49 -- -- -- --

50 –114.5 –15.33 -- --

51 -- -- -- --

52 -- -- -- --

53 -- -- -- --

54 -- -- -- --

55 -- -- -- --

56 -- -- -- --

57 -- -- -- --

58 -- -- -- --

59 -- -- -- --

60 -- -- -- --

61 -- -- -- --

62 -- -- -- --

63 -- -- -- --

64 -- -- -- --

65 -- -- -- --

66 -- -- -- --

67 -- -- -- --

68 -- -- -- --

69 -- -- –188.9 –65.09

70 -- -- -- --

71 -- -- -- --
Appendix 181

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

72 -- -- -- --

73 -- -- -- --

74 -- -- -- --

75 -- -- -- --

76 -- -- -- --

77 -- -- -- --

78 -- -- -- --

79 -- -- -- --

80 -- -- -- --

81 -- -- -- --

82 -- -- -- --

83 -- -- -- --

84 -- -- -- --

85 -- -- -- --

86 -- -- -- --

87 -- -- -- --

88 -- -- -- --

89 -- -- –228.7 –55.51

90 -- -- -- --

91 -- -- -- --

92 -- -- -- --

93 -- -- -- --

94 -- -- -- --

95 -- -- -- --

96 -- -- -- --

97 -- -- -- --

98 -- -- -- --

99 -- -- –168 -40.33

100 -- -- –185.8 –39.9

101 -- -- -- --

102 -- -- –189.3 –41.3

103 -- -- -- --

104 -- -- –142.4 –38.57

105 -- -- -- --

106 -- -- –185.1 –39.88

107 -- -- -- --

108 -- -- -- --

109 -- -- –200.3 –55.86

110 -- -- –213.9 –56.5

111 -- -- -- --

112 -- -- -- --

113 -- -- –169.7 –37.83

114 -- -- –190.5 –44.14

115 -- -- -- --

116 -- -- -- --

117 -- -- -- --

118 -- -- -- --

119 -- -- -- --

120 -- -- -- --

121 -- -- -- --

122 -- -- -- --

123 -- -- -- --

124 -- -- -- --

125 -- -- -- --

126 -- -- -- --

127 -- -- -- --

128 -- -- -- --

129 -- -- -- --

130 -- -- -- --

131 -- -- –190.1 –43.87

132 -- -- -- --

133 -- -- -- --

134 -- -- -- --
182 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

135 -- -- -- --

138 -- -- -- --

142 -- -- -- --

143 -- -- -- --

144 -- -- -- --

145 -- -- -- --

146 -- -- -- --

147 -- -- -- --

148 -- -- -- --

149 -- -- -- --

150 -- -- -- --

151 -- -- -- --

152 -- -- -- --

153 -- -- -- --

154 -- -- -- --

155 -- -- -- --

157 -- -- -- --

158 –113.3 –15.22 -- --

159 –119.1 –15.99 -- --

161 -- -- -- --

162 –120.6 –15.77 -- --

163 –121.2 –15.48 -- --

164 –100.3 –13.7 -- --

165 –113.4 –15.15 -- --

166 -- -- -- --

167 -- -- -- --

168 -- -- -- --

169 -- -- -- --

169 -- -- -- --

170 -- -- -- --

171 -- -- -- --

172 -- -- -- --

173 -- -- -- --

174 -- -- -- --

175 -- -- -- --

176 -- -- -- --

177 -- -- -- --

178 -- -- -- --

179 -- -- -- --

180 -- -- -- --

181 -- -- -- --

182 -- -- -- --

182 -- -- –176.300 –41.690

183 -- -- -- --

184 -- -- –184.200 –40.390

185 -- -- -- --

186 -- -- -- --

187 -- -- -- --

187 -- -- –217.300 –75.740

188 -- -- -- --

189 -- -- -- --

189 -- -- –119.600 –36.970

191 -- -- -- --

192 -- -- -- --

193 -- -- -- --

194 -- -- -- --

195 -- -- -- --

196 -- -- -- --

197 -- -- -- --

198 -- -- -- --

199 -- -- -- --

200 -- -- -- --

201 -- -- -- --
Appendix 183

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

201 -- -- -- --

202 -- -- -- --

203 -- -- -- --

203 -- -- –167.800 –39.270

204 -- -- -- --

205 -- -- -- --

205 -- -- –182.600 –40.990

206 -- -- -- --

207 -- -- -- --

208 -- -- -- --

209 -- -- -- --

211 -- -- -- --

213 -- -- -- --

214 -- -- -- --

214 -- -- –199.300 –75.160

215 -- -- -- --

216 -- -- -- --

216 -- -- –203.5 –44.680

217 -- -- -- --

218 -- -- -- --

219 -- -- -- --

220 -- -- -- --

221 -- -- -- --

222 -- -- -- --

223 -- -- -- --

224 -- -- –170.1 –40.08

225 -- -- -- --

226 U U –175.8 –69.88

227 -- -- -- --

228 -- -- -- --

228 -- -- –236.5 –64.910

229 -- -- -- --

230 -- -- -- --

231 -- -- -- --

232 -- -- -- --

233 -- -- -- --

234 -- -- -- --

235 -- -- -- --

236 -- -- -- --

237 -- -- -- --

238 -- -- -- --

239 -- -- -- --

240 -- -- -- --

241 -- -- -- --

242 -- -- -- --

243 -- -- -- --

244 -- -- -- --

245 -- -- -- --

246 -- -- -- --

247 -- -- -- --

248 -- -- -- --

249 -- -- -- --

250 -- -- -- --

251 -- -- -- --

252 -- -- -- --

253 -- -- -- --

254 -- -- -- --

255 -- -- -- --

256 -- -- -- --

256 -- -- –181.900 –62.530

257 -- -- -- --

258 -- -- -- --

259 –130.600 –17.300 -- --

259 -- -- -- --
184 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

260 -- -- -- --

261 -- -- -- --

262 -- -- -- --

263 -- -- -- --

264 -- -- -- --

264 -- -- -- --

265 -- -- -- --

266 -- -- -- --

267 -- -- -- --

268 -- -- -- --

269 -- -- -- --

270 -- -- -- --

271 -- -- -- --

272 -- -- -- --

273 -- -- -- --

274 -- -- -- --

275 -- -- -- --

276 -- -- –161 –36.45

277 -- -- -- --

278 -- -- -- --

279 -- -- -- --

280 -- -- –98.1 –50.88

281 -- -- -- U

282 –115.5 –15.52 –189 –81.15

283 -- -- -- --

284 -- -- -- --

285 -- -- -- --

286 -- -- -- --

287 -- -- -- --

288 -- -- -- --

289 -- -- -- --

290 -- -- -- --

291 -- -- -- --

292 -- -- -- --

293 -- -- -- --

294 -- -- -- --

295 -- -- -- --

296 -- -- -- --

297 -- -- -- --

298 -- -- -- --

299 -- -- -- --

300 -- -- –177.1 –73.27

301 -- -- –187.9 –74.7

302 -- -- -- --

303 -- -- -- --

304 -- -- -- --

305 -- -- -- --

306 -- -- -- --

307 -- -- -- --

308 -- -- -- --

309 -- -- -- --

310 -- -- -- --

311 -- -- –188.4 –53.68

312 -- -- -- --

313 -- -- -- --

314 -- -- -- --

315 -- -- -- --

316 -- -- –223.2 –58.41

317 -- -- -- --

318 -- -- -- --

319 -- -- -- --

320 -- -- -- --

321 -- -- -- --
Appendix 185

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

322 -- -- -- --

323 -- -- -- --

324 -- -- -- --

325 -- -- –132.4 –39.24

326 -- -- -- --

327 -- -- -- --

328 -- -- -- --

329 -- -- -- --

330 -- -- -- --

331 -- -- -- --

332 -- -- -- --

333 -- -- -- --

334 -- -- -- --

335 -- -- -- --

336 -- -- -- --

337 -- -- -- --

338 -- -- -- --

339 -- -- -- --

340 -- -- -- --

341 -- -- -- --

342 -- -- -- --

343 -- -- -- --

344 -- -- -- --

345 -- -- -- --

346 -- -- -- --

347 -- -- -- --

348 -- -- -- --

349 -- -- -- --

350 -- -- -- --

351 -- -- -- --

352 -- -- -- --

353 -- -- -- --

354 -- -- -- --

355 -- -- -- --

356 -- -- -- --

357 -- -- -- --

358 -- -- -- --

359 -- -- –186.8 –46.28

360 -- -- –182.2 –46.93

361 -- -- –75.26 --

362 -- -- -- --

363 -- -- -- --

364 -- -- –199.3 –75.16

365 -- -- –190.6 –49.38

366 -- -- -- --

367 -- -- -- --

368 -- -- -- --

369 -- -- -- --

370 -- -- -- --

371 -- -- -- --

372 -- -- -- --

373 -- -- -- --

374 -- -- -- --

375 -- -- -- --

376 -- -- –54.09 --

377 -- -- -- --

378 -- -- -- --

379 -- -- -- --

380 -- -- -- --

381 -- -- -- --

382 -- -- -- --

383 -- -- -- --

384 -- -- -- --

385 -- -- -- --
186 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

386 -- -- -- --

387 -- -- -- --

388 -- -- -- --

389 -- -- -- --

390 -- -- -- --

391 -- -- -- --

392 -- -- -- --

393 -- -- -- --

394 -- -- -- --

395 -- -- -- --

396 -- -- -- --

397 -- -- -- --

398 -- -- -- --

399 -- -- -- --

400 -- -- -- --

401 -- -- –61.81 --

402 -- -- -- --

403 -- -- -- --

404 -- -- -- --

405 -- -- -- --

406 -- -- -- --

407 -- -- -- --

408 -- -- -- --

409 -- -- -- --

410 -- -- -- --

414 -- -- -- --

415 -- -- -- --

416 -- -- -- --

417 -- -- -- --

418 -- -- -- --

419 -- -- -- --

420 -- -- -- --

428 -- -- -- --

429 -- -- -- --

430 -- -- -- --

432 -- -- -- --

433 -- -- -- --

434 -- -- -- --

435 -- -- -- --

436 -- -- -- --

437 -- -- -- --

438 -- -- -- --

439 -- -- -- --

440 -- -- -- --

441 -- -- -- --

442 -- -- -- --

443 -- -- -- --

444 -- -- -- --

445 -- -- -- --

446 -- -- -- --

447 -- -- -- --

447 -- -- -- --

448 -- -- -- --

448 -- -- -- --

449 -- -- -- --

450 -- -- -- --

451 -- -- -- --

452 -- -- -- --

453 -- -- -- --

453 -- -- -- --

454 -- -- -- --

454 -- -- -- --

455 -- -- -- --

456 -- -- -- --
Appendix 187

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

457 -- -- -- --

458 -- -- -- --

459 -- -- -- --

460 -- -- -- --

461 -- -- -- --

462 -- -- -- --

463 -- -- -- --

464 -- -- -- --

465 –48 –3.9 -- --

466 -- -- -- --

468 -- -- -- --

469 -- -- -- --

470 -- -- -- --

471 -- -- -- --

472 -- -- -- --

473 -- -- -- --

474 -- -- -- --

475 -- -- -- --

476 -- -- -- --

477 -- -- -- --

478 -- -- -- --

479 -- -- -- --

480 -- -- -- --

481 -- -- -- --

482 -- -- -- --

483 -- -- -- --

484 -- -- -- --

485 -- -- -- --

486 -- -- -- --

487 -- -- -- --

488 -- -- -- --

489 -- -- -- --

490 -- -- -- --

491 -- -- -- --

492 -- -- -- --

493 -- -- -- --

494 -- -- -- --

495 -- -- -- --

496 -- -- -- --

497 -- -- -- --

498 -- -- -- --

499 -- -- -- --

500 -- -- -- --

501 -- -- -- --

502 -- -- -- --

503 -- -- -- --

504 -- -- -- --

505 -- -- -- --

506 -- -- -- --

507 -- -- -- --

508 -- -- -- --

509 -- -- -- --

510 -- -- -- --

511 -- -- -- --

512 -- -- -- --

513 U U U U

514 -- -- -- --

515 -- -- -- --

516 -- -- -- --

517 -- -- -- --

518 -- -- -- --

519 -- -- -- --

520 -- -- -- --

521 -- -- -- --
188 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

522 -- -- -- --

523 –118 –16.16 -- --

524 -- -- -- --

525 -- -- -- --

526 -- -- -- --

527 -- -- -- --

528 -- -- -- --

529 -- -- -- --

530 -- -- –43.38 --

531 -- -- -- --

532 -- -- -- --

533 -- -- -- --

534 -- -- -- --

535 -- -- -- --

536 -- -- -- --

537 -- -- -- --

538 -- -- -- --

539 -- -- -- --

540 -- -- -- --

541 -- -- -- --

542 -- -- -- --

543 -- -- -- --

544 -- -- -- --

558 -- -- -- --

559 -- -- -- --

560 -- -- -- --

561 -- -- -- --

562 -- -- -- --

563 -- -- -- --

564 -- -- -- --

565 -- -- -- --

566 -- -- -- --

569 -- -- -- --

570 -- -- -- --

571 -- -- -- --

572 -- -- -- --

573 -- -- -- --

574 -- -- -- --

575 -- -- -- --

576 -- -- -- --

577 -- -- -- --

578 -- -- -- --

579 -- -- -- --

580 -- -- -- --

581 -- -- -- --

582 -- -- -- --

583 -- -- -- --

584 -- -- -- --

585 -- -- -- --

586 -- -- -- --

587 -- -- -- --

588 -- -- -- --

589 -- -- -- --

590 -- -- -- --

591 -- -- -- --

592 -- -- -- --

593 -- -- -- --

594 -- -- -- --

595 -- -- -- --

596 -- -- -- --

597 -- -- -- --

598 -- -- -- --

599 -- -- -- --

600 -- -- -- --
Appendix 189

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

601 -- -- -- --

602 -- -- -- --

603 -- -- -- --

604 -- -- -- --

605 U U U U

606 U U U U

607 -- -- -- --

608 -- -- -- --

609 -- -- -- --

610 -- -- -- --

611 -- -- -- --

612 -- -- -- --

613 -- -- -- --

614 -- -- -- --

615 -- -- -- --

616 -- -- -- --

617 -- -- -- --

623 –118 –15.44 -- --

624 –120.6 –15.75 -- --

625 -- -- -- --

626 -- -- -- --

627 –115.7 –15.18 -- --

628 -- -- -- --

629 -- -- -- --

630 -- -- -- --

631 -- -- -- --

632 -- -- -- --

633 -- -- -- --

634 -- -- -- --

635 -- -- -- --

636 -- -- -- --

637 -- -- -- --

638 -- -- -- --

639 -- -- -- --

640 -- -- -- --

641 -- -- -- --

642 -- -- -- --

643 -- -- -- --

644 -- -- -- --

645 -- -- -- --

646 -- -- -- --

647 -- -- -- --

649 -- -- -- --

650 -- -- -- --

651 -- -- -- --

652 -- -- -- --

653 -- -- -- --

654 -- -- -- --

655 -- -- -- --

656 -- -- -- --

657 -- -- -- --

658 -- -- -- --

660 -- -- -- --

660 -- -- -- --

661 -- -- -- --

662 -- -- -- --

663 -- -- -- --

663 -- -- -- --

664 -- -- -- --

665 -- -- -- --

666 -- -- -- --

667 -- -- -- --

668 -- -- -- --

669 -- -- -- --
190 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

670 -- -- -- --

671 -- -- -- --

672 -- -- -- --

673 -- -- -- --

674 -- -- -- --

675 -- -- -- --

676 -- -- -- --

677 -- -- -- --

678 -- -- -- --

679 -- -- -- --

680 -- -- -- --

681 -- -- -- --

682 -- -- -- --

683 -- -- -- --

684 -- -- -- --

685 -- -- -- --

686 -- -- -- --

687 -- -- -- --

688 -- -- -- --

689 -- -- -- --

690 -- -- -- --

691 -- -- -- --

692 -- -- -- --

693 -- -- -- --

694 -- -- -- --

695 -- -- -- --

696 -- -- -- --

699 -- -- -- --

704 -- -- -- --

706 -- -- -- --

707 -- -- -- --

708 -- -- -- --

709 -- -- -- --

710 -- -- -- --

711 -- -- -- --

712 -- -- -- --

714 -- -- -- --

715 -- -- -- --

716 -- -- -- --

717 -- -- -- --

718 -- -- -- --

719 -- -- -- --

720 -- -- -- --

721 -- -- -- --

722 -- -- -- --

723 -- -- -- --

724 -- -- -- --

725 -- -- -- --

726 -- -- -- --

727 -- -- -- --

728 -- -- -- --

729 -- -- -- --

730 -- -- -- --

731 -- -- -- --

732 -- -- -- --

733 -- -- -- --

734 -- -- -- --

735 -- -- -- --

736 -- -- -- --

737 -- -- -- --

738 -- -- -- --

739 -- -- -- --

740 -- -- -- --

741 -- -- -- --
Appendix 191

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

742 -- -- -- --

743 -- -- -- --

744 -- -- -- --

745 -- -- -- --

746 -- -- -- --

747 -- -- -- --

748 -- -- -- --

749 -- -- -- --

750 -- -- -- --

751 -- -- -- --

752 -- -- -- --

753 -- -- -- --

754 -- -- -- --

755 -- -- -- --

756 -- -- -- --

757 -- -- -- --

758 -- -- -- --

759 -- -- -- --

760 -- -- -- --

761 -- -- -- --

762 -- -- -- --

763 -- -- -- --

764 -- -- -- --

765 -- -- -- --

766 -- -- -- --

767 -- -- -- --

768 -- -- -- --

769 -- -- -- --

770 -- -- -- --

771 -- -- -- --

772 -- -- -- --

773 -- -- -- --

774 -- -- -- --

775 -- -- -- --

776 -- -- -- --

777 -- -- -- --

778 -- -- -- --

779 -- -- -- --

780 -- -- -- --

781 -- -- -- --

782 -- -- -- --

783 -- -- -- --

784 -- -- -- --

785 -- -- -- --

786 -- -- -- --

787 -- -- -- --

788 -- -- -- --

789 -- -- -- --

790 -- -- -- --

791 -- -- -- --

792 -- -- -- --

793 -- -- -- --

794 -- -- -- --

795 -- -- -- --

796 -- -- -- --

797 -- -- -- --

798 -- -- -- --

799 -- -- -- --

800 -- -- -- --

801 -- -- -- --

802 -- -- -- --

803 -- -- -- --

804 –112.5 –15.02 -- --

805 –115 –14.98 -- --
192 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

806 -- -- -- --

807 –58.3 –8.9 -- --

811 –121.8 –16.25 -- --

812 –120.6 –15.68 -- --

813 –116.1 –15.05 -- --

814 –119.6 –15.74 -- --

815 -- -- -- --

816 –119.6 –15.7 -- --

817 –120.8 –15.93 -- --

818 -- -- -- --

819 -- -- -- --

820 –121.6 –16.02 -- --

821 -- -- -- --

822 -- -- -- --

823 -- -- -- --

824 -- -- -- --

825 -- -- -- --

826 -- -- -- --

827 -- -- -- --

828 -- -- -- --

829 -- -- -- --

830 -- -- -- --

831 -- -- -- --

832 -- -- -- --

833 -- -- -- --

834 -- -- -- --

835 -- -- -- --

836 -- -- -- --

837 -- -- -- --

838 -- -- -- --

838 -- -- -- --

839 -- -- -- --

840 -- -- -- --

840 -- -- -- --

841 -- -- -- --

842 -- -- -- --

842 -- -- -- --

843 -- -- -- --

844 -- -- -- --

845 -- -- -- --

846 -- -- -- --

847 -- -- -- --

848 -- -- -- --

849 -- -- -- --

850 -- -- -- --

851 -- -- -- --

852 -- -- -- --

853 -- -- -- --

854 -- -- -- --

855 -- -- -- --

855 -- -- -- --

856 -- -- -- --

857 -- -- -- --

858 -- -- -- --

859 -- -- -- --

860 -- -- -- --

860 -- -- -- --

861 -- -- -- --

862 -- -- -- --

862 -- -- -- --

863 -- -- -- --

864 -- -- -- --

865 -- -- -- --

866 -- -- -- --
Appendix 193

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

866 -- -- -- --

867 -- -- -- --

868 -- -- -- --

869 -- -- -- --

870 -- -- -- --

871 -- -- -- --

872 -- -- -- --

873 -- -- -- --

874 -- -- -- --

875 -- -- -- --

876 -- -- -- --

877 -- -- -- --

878 -- -- -- --

879 -- -- -- --

880 -- -- -- --

881 -- -- -- --

882 -- -- -- --

883 -- -- -- --

884 -- -- -- --

885 -- -- -- --

886 -- -- -- --

887 -- -- -- --

888 -- -- -- --

889 -- -- -- --

890 -- -- -- --

891 -- -- -- --

892 -- -- -- --

893 -- -- -- --

894 -- -- -- --

895 -- -- -- --

896 -- -- -- --

897 -- -- -- --

898 -- -- -- --

898 -- -- -- --

899 -- -- -- --

899 -- -- -- --

900 -- -- -- --

901 -- -- -- --

902 -- -- -- --

903 -- -- -- --

904 -- -- -- --

905 -- -- -- --

905 -- -- -- --

906 -- -- -- --

907 -- -- -- --

907 -- -- -- --

908 -- -- -- --

908 -- -- -- --

909 -- -- -- --

910 -- -- -- --

911 -- -- -- --

912 -- -- -- --

913 -- -- -- --

913 -- -- -- --

915 -- -- -- --

916 -- -- -- --

916 -- -- -- --

917 -- -- -- --

918 -- -- -- --

918 -- -- -- --

919 -- -- -- --

920 -- -- -- --

921 -- -- -- --

922 -- -- -- --
194 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

923 -- -- -- --

924 -- -- -- --

924 -- -- -- --

925 -- -- -- --

925 -- -- -- --

926 -- -- -- --

927 -- -- -- --

928 -- -- -- --

928 -- -- -- --

930 -- -- -- --

931 -- -- -- --

932 -- -- -- --

933 -- -- -- --

934 -- -- -- --

934 -- -- -- --

935 -- -- -- --

936 -- -- -- --

937 -- -- -- --

938 -- -- -- --

939 -- -- -- --

940 -- -- -- --

941 -- -- -- --

942 -- -- -- --

943 -- -- -- --

944 -- -- -- --

945 -- -- -- --

946 -- -- -- --

947 -- -- -- --

948 -- -- -- --

949 -- -- -- --

950 -- -- -- --

951 -- -- -- --

952 -- -- -- --

953 -- -- -- --

954 -- -- -- --

955 -- -- -- --

956 -- -- -- --

957 -- -- -- --

958 -- -- -- --

959 -- -- -- --

960 -- -- -- --

961 -- -- -- --

962 -- -- -- --

963 -- -- -- --

964 -- -- -- --

965 -- -- -- --

966 -- -- -- --

967 -- -- -- --

968 -- -- -- --

969 -- -- -- --

970 -- -- -- --

971 -- -- -- --

972 -- -- -- --

973 -- -- -- --

974 -- -- -- --

975 -- -- -- --

976 -- -- -- --

977 -- -- -- --

978 -- -- -- --

979 -- -- -- --

980 -- -- -- --

981 -- -- -- --

982 -- -- -- --

983 -- -- -- --
Appendix 195

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

984 -- -- -- --

985 -- -- -- --

986 -- -- -- --

987 -- -- -- --

988 -- -- -- --

989 -- -- -- --

990 -- -- -- --

991 -- -- -- --

992 -- -- -- --

993 -- -- -- --

994 -- -- -- --

995 -- -- -- --

996 -- -- -- --

997 -- -- -- --

998 -- -- -- --

999 -- -- -- --

1000 -- -- -- --

1001 -- -- -- --

1002 -- -- -- --

1003 -- -- -- --

1004 -- -- -- --

1005 -- -- -- --

1006 -- -- -- --

1007 -- -- -- --

1008 -- -- -- --

1009 -- -- -- --

1010 -- -- -- --

1011 -- -- -- --

1012 -- -- -- --

1013 -- -- -- --

1014 -- -- -- --

1015 -- -- -- --

1016 -- -- -- --

1017 -- -- -- --

1018 -- -- -- --

1019 -- -- -- --

1020 -- -- -- --

1021 -- -- -- --

1022 -- -- -- --

1023 -- -- -- --

1024 -- -- -- --

1025 -- -- -- --

1026 -- -- -- --

1027 -- -- -- --

1028 -- -- -- --

1029 -- -- -- --

1030 -- -- -- --

1031 -- -- -- --

1032 -- -- -- --

1033 -- -- -- --

1034 -- -- -- --

1038 -- -- -- --

1039 -- -- -- --

1051 -- -- -- --

1052 -- -- -- --

1053 -- -- -- --

1054 -- -- -- --

1055 -- -- -- --

1057 -- -- -- --

1058 -- -- -- --

1059 -- -- -- --

1062 -- -- -- --

1064 -- -- -- --
196 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1065 -- -- -- --

1066 -- -- -- --

1067 -- -- -- --

1068 -- -- -- --

1069 -- -- -- --

1070 -- -- -- --

1071 –154 –19.4 -- --

1073 -- -- -- --

1080 –140 –17.7 -- --

1081 -- -- -- --

1084 -- -- -- --

1085 -- -- -- --

1091 -- -- -- --

1094 -- -- -- --

1095 -- -- -- --

1096 -- -- -- --

1099 -- -- -- --

1100 -- -- -- --

1101 -- -- -- --

1107 -- -- -- --

1125 -- -- -- --

1130 -- -- -- --

1141 -- -- -- --

1142 -- -- -- --

1144 -- -- -- --

1146 -- -- -- --

1147 -- -- -- --

1149 -- -- -- --

1153 -- -- -- --

1154 -- -- -- --

1160 -- -- -- --

1164 -- -- -- --

1173 -- -- -- --

1174 -- -- -- --

1175 -- -- -- --

1176 -- -- -- --

1177 -- -- -- --

1178 -- -- -- --

1182 -- -- -- --

1185 -- -- -- --

1186 -- -- -- --

1187 -- -- -- --

1188 -- -- -- --

1189 -- -- -- --

1190 -- -- -- --

1191 -- -- -- --

1192 -- -- -- --

1193 -- -- -- --

1194 -- -- -- --

1195 -- -- -- --

1196 -- -- -- --

1197 -- -- -- --

1198 -- -- -- --

1199 -- -- -- --

1200 -- -- -- --

1201 -- -- -- --

1202 -- -- -- --

1203 -- -- -- --

1204 -- -- -- --

1205 -- -- -- --

1206 -- -- -- --

1207 -- -- -- --

1208 -- -- -- --
Appendix 197

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1209 -- -- -- --

1210 -- -- -- --

1211 -- -- -- --

1213 -- -- -- --

1230 -- -- -- --

1237 -- -- -- --

1239 -- -- -- --

1244 -- -- -- --

1250 -- -- -- --

1251 -- -- -- --

1252 -- -- -- --

1253 -- -- -- --

1254 -- -- -- --

1256 -- -- -- --

1260 -- -- -- --

1265 -- -- -- --

1267 -- -- -- --

1272 -- -- -- --

1273 -- -- -- --

1277 -- -- -- --

1282 -- -- -- --

1297 -- -- -- --

1302 -- -- -- --

1305 -- -- -- --

1306 -- -- -- --

1307 -- -- -- --

1317 -- -- -- --

1318 -- -- -- --

1321 -- -- -- --

1327 -- -- -- --

1328 -- -- -- --

1329 -- -- -- --

1330 -- -- -- --

1333 -- -- -- --

1369 -- -- -- --

1371 -- -- -- --

1381 -- -- -- --

1382 -- -- -- --

1383 -- -- -- --

1387 -- -- -- --

1388 -- -- -- --

1389 -- -- -- --

1390 -- -- -- --

1391 -- -- -- --

1392 -- -- -- --

1393 -- -- -- --

1395 -- -- -- --

1403 -- -- -- --

1409 -- -- -- --

1410 -- -- -- --

1411 -- -- -- --

1415 -- -- -- --

1416 -- -- -- --

1418 -- -- -- --

1419 -- -- -- --

1420 -- -- -- --

1421 -- -- -- --

1422 -- -- -- --

1423 –136 –17.8 -- --

1426 -- -- -- --

1433 -- -- -- --

1438 -- -- -- --

1443 -- -- -- --
198 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1445 -- -- -- --

1448 -- -- -- --

1450 -- -- -- --

1452 -- -- -- --

1454 –144 –18.6 -- --

1461 -- -- -- --

1463 -- -- -- --

1464 -- -- -- --

1465 -- -- -- --

1466 -- -- -- --

1467 -- -- -- --

1468 -- -- -- --

1469 -- -- -- --

1475 -- -- -- --

1476 -- -- -- --

1477 -- -- -- --

1478 -- -- -- --

1480 -- -- -- --

1482 -- -- -- --

1484 -- -- -- --

1486 -- -- -- --

1487 -- -- -- --

1488 -- -- -- --

1492 -- -- -- --

1497 -- -- -- --

1498 -- -- -- --

1499 -- -- -- --

1502 -- -- -- --

1506 -- -- -- --

1507 -- -- -- --

1508 -- -- -- --

1509 -- -- -- --

1510 -- -- -- --

1512 -- -- -- --

1513 -- -- -- --

1514 -- -- -- --

1515 -- -- -- --

1516 -- -- -- --

1517 -- -- -- --

1518 -- -- -- --

1519 -- -- -- --

1523 -- -- -- --

1526 -- -- -- --

1530 -- -- -- --

1532 -- -- -- --

1535 -- -- -- --

1536 -- -- -- --

1538 -- -- -- --

1539 -- -- -- --

1539 -- -- -- --

1540 -- -- -- --

1541 -- -- -- --

1542 -- -- -- --

1546 –142 –18.2 -- --

1547 –148 –18.9 -- --

1549 -- -- -- --

1552 -- -- -- --

1555 -- -- -- --

1558 -- -- -- --

1559 -- -- -- --

1560 -- -- -- --

1561 -- -- -- --

1565 -- -- -- --
Appendix 199

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1566 -- -- -- --

1567 -- -- -- --

1568 -- -- -- --

1571 -- -- -- --

1576 -- -- -- --

1580 -- -- -- --

1581 -- -- -- --

1587 -- -- -- --

1592 -- -- -- --

1593 -- -- -- --

1594 -- -- -- --

1595 -- -- -- --

1596 -- -- -- --

1597 -- -- -- --

1598 -- -- -- --

1599 -- -- -- --

1600 -- -- -- --

1601 -- -- -- --

1602 -- -- -- --

1603 -- -- -- --

1604 -- -- -- --

1605 -- -- -- --

1607 -- -- -- --

1609 -- -- -- --

1610 -- -- -- --

1612 -- -- -- --

1613 –139 –17.5 -- --

1614 –150 –19.2 -- --

1617 -- -- -- --

1622 -- -- -- --

1623 -- -- -- --

1626 -- -- -- --

1628 -- -- -- --

1631 -- -- -- --

1632 -- -- -- --

1633 -- -- -- --

1634 -- -- -- --

1635 -- -- -- --

1636 -- -- -- --

1639 -- -- -- --

1640 -- -- -- --

1641 -- -- -- --

1642 -- -- -- --

1643 -- -- -- --

1644 -- -- -- --

1645 -- -- -- --

1646 -- -- -- --

1647 -- -- -- --

1648 -- -- -- --

1649 -- -- -- --

1650 -- -- -- --

1651 -- -- -- --

1652 -- -- -- --

1653 -- -- -- --

1654 -- -- -- --

1655 -- -- -- --

1656 -- -- -- --

1657 -- -- -- --

1658 -- -- -- --

1659 -- -- -- --

1660 -- -- -- --

1661 -- -- -- --

1662 -- -- -- --

1664 -- -- -- --
200 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1665 -- -- -- --

1666 -- -- -- --

1667 -- -- -- --

1668 -- -- -- --

1669 -- -- -- --

1670 -- -- -- --

1671 -- -- -- --

1672 -- -- -- --

1673 -- -- -- --

1674 -- -- -- --

1675 -- -- -- --

1676 -- -- -- --

1677 -- -- -- --

1678 -- -- -- --

1679 -- -- -- --

1680 -- -- -- --

1681 -- -- -- --

1682 -- -- -- --

1683 -- -- -- --

1684 -- -- -- --

1685 -- -- -- --

1686 -- -- -- --

1687 -- -- -- --

1688 -- -- -- --

1689 -- -- -- --

1690 -- -- -- --

1691 -- -- -- --

1692 -- -- -- --

1693 -- -- -- --

1694 -- -- -- --

1695 -- -- -- --

1696 -- -- -- --

1697 -- -- -- --

1699 -- -- -- --

1700 -- -- -- --

1701 -- -- -- --

1702 -- -- -- --

1703 -- -- -- --

1704 -- -- -- --

1705 -- -- -- --

1706 -- -- -- --

1707 -- -- -- --

1708 -- -- -- --

1709 -- -- -- --

1710 -- -- -- --

1711 -- -- -- --

1712 -- -- -- --

1713 -- -- -- --

1714 -- -- -- --

1715 -- -- -- --

1716 -- -- -- --

1723 -- -- -- --

1727 -- -- -- --

1728 -- -- -- --

1730 -- -- -- --

1731 -- -- -- --

1732 -- -- -- --

1733 -- -- -- --

1734 -- -- -- --

1735 -- -- -- --

1736 -- -- -- --

1738 -- -- -- --

1741 -- -- -- --

1742 -- -- -- --
Appendix 201

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1743 -- -- -- --

1744 -- -- -- --

1745 -- -- -- --

1747 -- -- -- --

1752 U U U U

1753 -- -- -- --

1754 -- -- -- --

1755 U U U U

1756 -- -- -- --

1757 -- -- -- --

1758 -- -- -- --

1759 -- -- -- --

1760 -- -- -- --

1761 -- -- -- --

1762 -- -- -- --

1763 -- -- -- --

1765 –123 –16.35 -- --

1766 –119 –15.55 -- --

1768 –124 –16.4 -- --

1769 –121 –16.25 -- --

1770 -- -- -- --

1771 -- -- -- --

1772 -- -- -- --

1773 -- -- -- --

1774 -- -- -- --

1776 -- -- -- --

1777 -- -- -- --

1778 -- -- -- --

1779 -- -- -- --

1780 -- -- -- --

1781 -- -- -- --

1782 -- -- -- --

1783 -- -- -- --

1784 -- -- -- --

1785 -- -- -- --

1786 -- -- -- --

1787 -- -- -- --

1788 -- -- -- --

1789 -- -- -- --

1790 -- -- -- --

1791 -- -- -- --

1792 -- -- -- --

1793 -- -- -- --

1794 -- -- -- --

1795 -- -- -- --

1796 -- -- -- --

1797 -- -- -- --

1798 -- -- -- --

1799 -- -- -- --

1800 -- -- -- --

1801 -- -- -- --

1802 -- -- -- --

1803 -- -- -- --

1804 -- -- -- --

1805 -- -- -- --

1806 -- -- -- --

1807 -- -- -- --

1807 -- -- -- –40.310

1808 -- -- -- --

1809 -- -- -- --

1810 -- -- -- --

1811 U U U U

1812 U U U U

1813 -- -- -- --
202 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1814 -- -- -- --

1815 -- -- -- --

1816 U U U U

1817 U U U U

1818 -- -- -- --

1819 -- -- -- --

1820 -- -- -- --

1821 -- -- -- --

1822 -- -- -- --

1827 -- -- -- --

1828 -- -- -- --

1829 -- -- -- --

1830 -- -- -- --

1832 -- -- -- --

1833 -- -- -- --

1837 -- -- -- --

1842 -- -- -- --

1843 -- -- -- --

1845 -- -- -- --

1847 -- -- -- --

1855 -- -- -- --

1856 -- -- -- --

1857 -- -- -- --

1858 -- -- -- --

1859 -- -- -- --

1860 -- -- -- --

1861 -- -- -- --

1862 -- -- -- --

1863 -- -- -- --

1864 -- -- -- --

1865 -- -- -- --

1866 -- -- -- --

1867 -- -- -- --

1868 -- -- -- --

1869 -- -- -- --

1870 -- -- -- --

1871 -- -- -- --

1872 -- -- -- --

1873 -- -- -- --

1874 -- -- -- --

1875 -- -- -- --

1876 -- -- -- --

1877 -- -- -- --

1878 -- -- -- --

1879 -- -- -- --

1880 -- -- -- --

1881 -- -- -- --

1882 -- -- -- --

1883 -- -- -- --

1884 -- -- -- --

1885 -- -- -- --

1886 -- -- -- --

1887 -- -- -- --

1888 -- -- -- --

1889 -- -- -- --

1890 -- -- -- --

1891 -- -- -- --

1895 -- -- -- --

1896 -- -- -- --

1897 -- -- -- --

1898 -- -- -- --

1899 -- -- -- --

1900 -- -- -- --

1904 -- -- -- --
Appendix 203

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

1906 -- -- -- --

1907 -- -- -- --

1908 -- -- -- --

1909 -- -- -- --

1910 -- -- -- --

1911 -- -- -- --

1912 -- -- -- --

1913 -- -- -- --

1914 -- -- -- --

1915 -- -- -- --

1916 -- -- -- --

1917 -- -- -- --

1918 -- -- -- --

1919 -- -- -- --

1920 -- -- -- --

1921 -- -- -- --

1925 –117 –15.75 -- --

1926 –116 –15.5 -- --

1928 -- -- -- --

1930 -- -- -- --

1931 -- -- -- --

1932 -- -- -- --

1937 -- -- -- --

1938 -- -- -- --

1939 -- -- -- --

1940 -- -- -- --

1941 -- -- -- --

1942 -- -- -- --

1943 -- -- -- --

1944 -- -- -- --

1945 -- -- -- --

1946 -- -- -- --

1947 -- -- -- --

1951 -- -- -- --

1955 -- -- -- --

1962 -- -- -- --

1967 -- -- -- --

1968 -- -- -- --

1969 -- -- -- --

1970 -- -- -- --

1971 -- -- -- --

1972 -- -- -- --

1973 -- -- -- --

1974 -- -- -- --

1975 -- -- -- --

1976 -- -- -- --

1978 -- -- -- --

1981 -- -- -- --

1982 -- -- -- --

1983 -- -- -- --

1986 -- -- -- --

1990 -- -- -- --

1993 -- -- -- --

1995 -- -- -- --

1996 -- -- -- --

2001 -- -- -- --

2002 -- -- -- --

2003 -- -- -- --

2011 -- -- -- --

2012 -- -- -- --
204 Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009

Appendix 1. Water Quality Data Used in This Report.—Continued

Report

No.

Deuterium/Protium ratio,

water, unfiltered,

per mil (P82082)

Oxygen-18/Oxygen-16 ratio, 

water, unfiltered,

per mil (P82085)

Deuterium/Protium ratio 

in methane, water, filtered, 

per mil relative to VSMOW

Carbon-13/Carbon-12 ratio 

in methane, water, filtered, 

per mil relative to VSMOW

2013 -- -- -- --

2014 -- -- -- --

2015 -- -- -- --

2016 -- -- -- --

2017 -- -- -- --

2018 -- -- -- --

2019 -- -- -- --

2020 -- -- -- --

2021 -- -- -- --

2022 -- -- -- --

2023 -- -- -- --

2024 -- -- -- --

2025 -- -- -- --

2027 -- -- -- --

2029 -- -- -- --

2030 -- -- -- --

2033 -- -- -- --

2034 -- -- -- --

2035 -- -- -- --

2037 -- -- -- --

2040 -- -- -- --

2041 -- -- -- --

2044 -- -- -- --

2046 –119 –16.05 -- --

2046 -- -- -- --

2049 -- -- -- --

2050 -- -- -- --

2051 -- -- -- --

2052 -- -- -- --

2053 -- -- -- --

2054 -- -- -- --

2055 -- -- -- --

2056 -- -- -- --

2058 -- -- -- --

2061 –117 –15.65 -- --

2063 -- -- -- --

2064 -- -- -- --

2065 -- -- -- --

2066 -- -- -- --

2067 -- -- -- --

2068 -- -- -- --

2069 -- -- -- --

2070 -- -- -- --

2071 -- -- -- --

2072 -- -- -- --

2076 -- -- -- --

2077 -- -- –246.900 –45.170

2078 -- -- -- --

2079 -- -- -- --

2080 -- -- -- --

2082 -- -- -- --

2083 -- -- -- --

2084 -- -- -- --

2085 -- -- -- --

2088 -- -- -- --

2089 -- -- -- --

2090 -- -- -- --

2091 -- -- -- --

2094 -- -- -- --

2095 -- -- -- --

2096 -- -- -- --
Thomas and McMahon—Overview of Groundwater Quality in the Piceance Basin, Western Colorado, 1946–2009—Scientific Investigations Report 2012–5198