U.S. Department of the Interior 

U.S. Geological Survey

Selected Hydrologic Data from the Cedar 

Rapids Area, Linn County, Iowa, April 1996 

Through March 1999

By Robert A. Boyd, Ronald L. Kuzniar, and Peter M. Schulmeyer

Open-File Report 99-461

Prepared in cooperation with the

CITY OF CEDAR RAPIDS, IOWA

Iowa City, Iowa 

1999
U.S. Department of the Interior

Bruce Babbitt, Secretary

U.S. Geological Survey

Charles G. Groat, Director

Any use of trade, product, or firm names in this publication is for 

descriptive purposes only and does not imply endorsement by the 

U.S. Government

For additional information write to:

District Chief

U.S. Geological Survey, WRD

P.O. Box 1230

Iowa City, Iowa 52240

Copies of this report can be purchased from:

U.S. Geological Survey 

Branch of Information Services 

Box 25286, Denver Federal Center 

Denver, Colorado 80225
CONTENTS

Page

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

Introduction............................................................................................^ 1

Purpose and Scope...................................................................................................................................................... 3

Description of Study Area........................................................................................................................................... 3

Methods of Investigation...................................................................................................................................................^ 4

Well Construction and Nomenclature......................................................................................................................... 4

Water Quality.............................................................................................................................................................. 4

Ground-Water Levels .................................................................................................................................................. 7

Physical Properties...................................................................................................................................................... 7

SelectedHydrologic Data..................................................................................................................................................... 7

Water-Quality Data..................................................................................................................................................... 8

Ground-Water Levels.................................................................................................................................................. 8

Physcial Propeities.................................................................................................................................................^ 8

References Cited ..........................................................................................................................._^ 9

FIGURES

1-3. Maps showing:

1. Location of the Cedar Rapids, Iowa municipal well fields ............................................................................ 2

2. Sample collection and measurement sites in the Seminole and Northwest Well Fields, Cedar Rapids,

Iowa, April 1996-March 1999 .................................................................................................................... 5

3. Sample collection and measurement sites in the East and West Well Fields, Cedar Rapids, Iowa,

April 1996-March 1999.............................................................................................................................. 6

TABLES

1. Information for observation wells and sampling sites near the Cedar Rapids, Iowa, municipal well fields,

April 1996 through March 1999.......................................................................................................................... 10

2. Types of data collected at sampling and measurement sites near the Cedar Rapids, Iowa, municipal well

fields, April 1996 through March 1999............................................................................................................... 12

3. Summary of common-ion, trace-element, and nutrient concentrations in water samples collected from the

Cedar Rapids, Iowa, municipal well fields and Cedar River, April 1996 through March 1999.......................... 14

4. Summary of pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal

well fields, April 1996 through March 1999....................................................................................................... 16

5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar

Rapids, Iowa, municipal well fields and Cedar River, April 1996 through March 1999.................................... 19

6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids,

Iowa, municipal well fields and Cedar River, April 1996 through March 1999 ................................................. 33

7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal

well fields and Cedar River, April 1996 through March 1999............................................................................ 40

8. Dissolved concentrations of ethanesulfonic-acid degradates of acetanilide herbicides in water

samples collected from the Seminole Well Field and Cedar River, Cedar Rapids, Iowa, June 1998

through August 1998........................................................................................................................................... 68

9. Dissolved concentrations of oxanilic-acid degradates of acetanilide herbicides in water samples collected

from the Seminole Well Field and Cedar River, Cedar Rapids, Iowa, June 1998 through August 1998............ 69

lOa. Mean daily ground-water levels in observation well CRM-1 (map ID #1), East Well Field, Cedar Rapids,

Iowa, July 1997 through March 1999 ................................................................................................................. 70

lOb. Mean daily ground-water levels in observation well CRM-2 (map ID #2), West Well Field, Cedar Rapids,

Iowa, July 1997 through March 1999 ................................................................................................................. 73

TABLES iii
CONTENTS-Continued

Page

lOc. Mean daily ground-water levels in observation well CRM-3 (map ID #3), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through March 1999............................................................................................... 76

lOd. Mean daily ground-water levels in observation well CRM-4 (map ID #4), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through June 1998.................................................................................................. 79

lOe. Mean daily ground-water levels in observation well CRM-6 (map ID #5) Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 81

lOf. Mean daily ground-water levels in observation well CRM-7 (map ID #6), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 84

lOg. Mean daily ground-water levels in observation well CRM-9 (map ID #7), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 87

lOh. Mean daily ground-water levels in observation well CRM-11 (map ID #9), West Well Field, Cedar Rapids,

Iowa, July 1997 through February 1999.............................................................................................................. 90

lOi. Mean daily ground-water levels in observation well CRM-12 (map ID #10), East Well Field, Cedar Rapids,

Iowa, July 1997 through February 1999............................................................................................................... 93

lOj. Mean daily ground-water levels in observation well CRM-15 (map ID #12), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 96

10k. Mean daily ground-water levels in observation well CRM-16 (map ID #13), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 99

101. Mean daily ground-water levels in observation well CRM-17 (map ID #14), Seminole Well Field, Cedar

Rapids, Iowa, Novemebr 1997 through September 1998.................................................................................... 102

10m. Mean daily ground-water levels in observation well CRM-18 (map ID #15), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 104

lOn. Mean daily ground-water levels in observation well CRM-19 (map ID #16), Seminole Well Field, Cedar

Rapids, Iowa, January 1997 through February 1999........................................................................................... 107

lOo. Mean daily ground-water levels in observation well CRM-22 (map ID #19), Seminole Well Field, Cedar

Rapids, Iowa, February 1998 through February 1999......................................................................................... 110

lOp. Mean daily ground-water levels in observation well CRM-23 (map ID #20), Seminole Well Field, Cedar

Rapids, Iowa, February 1998 through February 1999......................................................................................... 112

lOq. Mean daily ground-water levels in observation well CRM-24 (map ID #21), Seminole Well Field, Cedar

Rapids, Iowa, February 1998 through February 1999......................................................................................... 114

lOr. Mean daily ground-water levels in observation well CRM-25 (map ID #22), Seminole Well Field, Cedar

Rapids, Iowa, February 1998 through March 1999............................................................................................. 116

10s. Mean daily ground-water levels in observation well CRM-27 (map ID #24), Seminole Well Field, Cedar

Rapids, Iowa, February 1998 through March 1999............................................................................................. 118

1 la. Mean daily specific conductance in ground water at site CRM-1 (map ID #1), East Well Field, Cedar

Rapids, Iowa, April 1996 through June 1997...................................................................................................... 120

lib. Mean daily specific conductance in ground water at site CRM-2 (map ID #2), West Well Field, Cedar

Rapids, Iowa, April 1996 through June 1997...................................................................................................... 122

lie. Mean daily specific conductance in ground water at site CRM-11 (map ID #9), West Well Field, Cedar

Rapids, Iowa, April 1996 through June 1997...................................................................................................... 124

lid. Mean daily specific conductance in ground water at site CRM-12 (map ID #10), East Well Field, Cedar

Rapids, Iowa, April 1996 through July 1997 ...................................................................................................... 126

1 le. Mean daily specific conductance in ground water at site CRM-20 (map ID #17), Northwest Well Field,

Cedar Rapids, Iowa, February 1998 through March 1999.................................................................................. 128

1 If. Mean daily specific conductance in ground water at site CRM-21 (map ID #18), Northwest Well Field,

Cedar Rapids, Iowa, February 1998 through March 1999.................................................................................. 130

1 Ig. Mean daily specific conductance in ground water at site CRM-22 (map ID #19), Seminole Well Field,

Cedar Rapids, Iowa, February 1998 through March 1999.................................................................................. 132

iv SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
CONTENTS-Continued

Page

1 Ih. Mean daily specific conductance in ground water at site CRM-23 (map ID #20), Seminole Well Field,

Cedar Rapids, Iowa, February 1998 through March 1999.................................................................................. 134

1 li. Mean daily specific conductance in ground water at site CRM-25 (map ID #22), Seminole Well Field,

Cedar Rapids, Iowa, February 1998 through March 1999.................................................................................. 136

1 Ij. Mean daily specific conductance in ground water at site CRM-27 (map ID #24), Seminole Well Field,

Cedar Rapids, Iowa, February 1998 through March 1999.................................................................................. 138

Ilk. Mean daily specific conductance in the Cedar River at site SW-2 (map ID #32), Seminole Well Field,

Cedar Rapids, Iowa, April 1996 through March 1999........................................................................................ 140

12a. Mean daily pH in ground water at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa,

April 1996 through June 1997............................................................................................................................. 144

12b. Mean daily pH in ground water at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa,

April 1996 through July 1997 ............................................................................................................................. 146

12c. Mean daily pH in ground water at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa,

April 1996 through June 1997............................................................................................................................. 148

12d. Mean daily pH in ground water at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa,

April 1996 through July 1997............................................................................................................................. 150

12e. Mean daily pH in ground water at site CRM-20 (map ID #17), Northwest Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 152

12f. Mean daily pH in ground water at site CRM-21 (map ID #18), Northwest Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 154

12g. Mean daily pH in ground water at site CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 156

12h. Mean daily pH in ground water at site CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 158

12i. Mean daily pH in the Cedar River at site SW-2 (map ID #32) Seminole Well Field, Cedar Rapids,

Iowa, October 1996 through March 1999 ........................................................................................................... 160

13a. Mean daily dissolved-oxygen concentration in ground water at site CRM-2 (map ID #2), West Well

Field, Cedar Rapids, Iowa, April 1996 through June 1997................................................................................. 164

13b. Mean daily dissolved-oxygen concentration in ground water at site CRM-12 (map ID #10), East Well

Field, Cedar Rapids, Iowa, April 1996 through July 1997.................................................................................. 166

13c. Mean daily dissolved-oxygen concentration in ground water at site CRM-20 (map ID #17), Northwest

Well Field, Cedar Rapids, Iowa, February 1998 through March 1999 ............................................................... 168

13d. Mean daily dissolved-oxygen concentration in ground water at site CRM-21 (map ID #18), Northwest

Well Field, Cedar Rapids, Iowa, February 1998 through March 1999 ............................................................... 170

13e. Mean daily dissolved-oxygen concentration in ground water at site CRM-22 (map ID #19), Seminole

Well Field, Cedar Rapids, Iowa, February 1998 through March 1999 ............................................................... 172

13f. Mean daily dissolved-oxygen concentration in ground water at site CRM-23 (map ID #20), Seminole

Well Field, Cedar Rapids, Iowa, February 1998 through March 1999 ............................................................... 174

13g. Mean daily dissolved-oxygen concentration in the Cedar River at site SW-2 (map ID #32), Seminole

Well Field, Cedar Rapids, Iowa, April 1996 through March 1999 ..................................................................... 176

14a. Mean daily ground-water temperature at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa,

April 1996 through February 1999...................................................................................................................... 180

14b. Mean daily ground-water temperature at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa,

April 1996 through February 1999...................................................................................................................... 184

14c. Mean daily ground-water temperature at site CRM-3 (map ID #3), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 188

14d. Mean daily ground-water temperature at site CRM-4 (map ID #4), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through June 1998............................................................................................................... 191

TABLES v
CONTENTS-Continued

Page

14e. Mean daily ground-water temperature at site CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 193

14f. Mean daily ground-water temperature at site CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 196

14g. Mean daily ground-water temperature at site CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 195

14h. Mean daily ground-water temperature at site CRM-11 (map ID #9), West Well Field, Cedar Rapids,

Iowa, April 1996 through February 1999............................................................................................................ 202

14i. Mean daily ground-water temperature at site CRM-12 (map ID #10), East Well Field, Cedar Rapids,

Iowa, April 1996 through February 1999............................................................................................................ 206

14j. Mean daily ground-water temperature at site CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 210

14k. Mean daily ground-water temperature at site CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 213

141. Mean daily ground-water temperature at site CRM-17 (map ID #14), Seminole Well Field, Cedar Rapids,

Iowa, November 1997 through September 1998................................................................................................. 216

14m. Mean daily ground-water temperature at site CRM-18 (map ID #15), Seminole Well Field, Cedar Rapids,

Iowa, February 1997 through February 1999...................................................................................................... 218

14n. Mean daily ground-water temperature at site CRM-19 (map ID #16), Seminole Well Field, Cedar Rapids,

Iowa, January 1997 through February 1999........................................................................................................ 221

14o. Mean daily ground-water temperature at site CRM-20 (map ID #17), Northwest Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 224

14p. Mean daily ground-water temperature at site CRM-21 (map ID #18), Northwest Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 226

14q. Mean daily ground-water temperature at site CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 228

14r. Mean daily ground-water temperature at site CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 230

14s. Mean daily ground-water temperature at site CRM-24 (map ID #21), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through March 1999.......................................................................................................... 232

14t. Mean daily ground-water temperature at site CRM-25 (map ID #22), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through February 1999...................................................................................................... 234

14u. Mean daily ground-water temperature at site CRM-27 (map ID #24), Seminole Well Field, Cedar Rapids,

Iowa, February 1998 through February 1999...................................................................................................... 236

14v. Mean daily water temperature in the Cedar River at site SW-2 (map ID #32), Seminole Well, Field, Cedar

Rapids, Iowa, April 1996 through March 1999................................................................................................... 238

vi SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
CONVERSION FACTORS, ABBREVIATIONS, AND VERTICAL DATUM

Multiply_______________by_____________To obtain

inch

foot

square mile

gallon 

cubic foot per second

2.54

0.3048

2.590

3.785 

0.002832

centimeter

meter

square kilometer

liter 

cubic meter per second

Temperature can be converted to degrees Celsius (°C) or degrees Fahrenheit (°F) by using the following equations:

°C = 5/9 (°F-32) 

°F = 9/5 (°C) + 32

Abbreviated water-quality units used in this report: Chemical concentrations are reported in milligrams per liter (mg/L), micro grams 

per liter (Hg/L), or microsiemens per centimeter p,S/cm at 25 degrees Celsius (°C). Milligrams per liter expresses the concentration of chemical constituents in solution as weight (milligrams) of solute per unit volume (liter) of water.

Micrograms per liter expresses the concentration of chemical constituents in solution as weight (micrograms) of solute per unit volume (liter) 

of water. Microsiemens per centimeter expresses the capability of a unit volume of water to conduct an applied electrical current.

Sea level: In this report, "sea level" refers to the National Geodetic Vertical Datum of 1929 (NGVD of 1929) a geodetic datum derived 

from a general adjustment of the first-order level nets of both the United States and Canada, formerly called the "Sea Level Datum of 1929."

TABLES vii
viii SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
SELECTED HYDROLOGIC DATA FROM THE CEDAR 

RAPIDS AREA, LINN COUNTY, IOWA, APRIL 1996 

THROUGH MARCH 1999

By ROBERT A. BOYD, RONALD L. KUZNIAR, and PETER M. SCHULMEYER

ABSTRACT

The City of Cedar Rapids, Iowa obtains its 

municipal water supply from four well fields along 

the Cedar River. The wells are completed at 

depths of about 60 to 80 feet in a shallow alluvial 

aquifer adjacent to the Cedar River. The City of 

Cedar Rapids and the U.S. Geological Survey 

have conducted a cooperative study of the groundwater flow system and water quality near the well 

fields since 1992. The purpose of this report is to 

document selected hydrologic data collected from 

April 1996 through March 1999. Data include the 

results of water-quality analyses, ground-waterlevels continuously measured with pressure transducers and data recorders, and physical properties 

continuously monitored using multiprobe instruments. Water-quality samples were collected from 

selected wells and the Cedar River to conduct periodic monitoring, to evaluate ground-water 

geochemistry, to assess the occurrence of pesticides and herbicide degradates in the alluvial aquifer, and to characterize water quality in shallow 

ground water near a wetland area in the Seminole 

Well Field. Types of water-quality analyses 

included common ions (calcium, chloride, iron, 

magnesium, manganese, potassium, silica, 

sodium, and sulfate), trace elements (boron, bromide, and fluoride), nutrients (ammonia as nitrogen, nitrite as nitrogen, nitrite plus nitrate as 

nitrogen, and orthophosphate as phosphorus), dissolved organic carbon, and selected pesticides and 

herbicide degradates. Ground-water levels in 

selected observation wells were continuously 

measured to assess temporal trends in groundwater levels in the alluvial aquifer and bedrock

aquifer, to help calibrate a ground-water flow 

model being constructed to simulate local groundwater flow under transient conditions near the well 

fields, and to assess hydrologic conditions near a 

wetland area in the Seminole Well Field. Physical 

properties (specific conductance, pH, dissolved 

oxygen, and water temperature) were continuously monitored to assess temporal variation and 

to help evaluate the interaction between the Cedar 

River and ground water in the alluvial aquifer.

INTRODUCTION

The City of Cedar Rapids, in Linn County, Iowa 

obtains its municipal water supply from four well fields 

(Seminole, East, West, and Northwest) along the Cedar 

River (fig. 1). Fifty-five municipal wells are completed 

at depths of about 60 to 80 feet (ft) in a shallow alluvial 

aquifer adjacent to the Cedar River. Twenty-three vertical wells are in the Seminole Well Field; 11 vertical 

wells are in the West Well Field; 19 vertical wells are 

in the East Well Field; and two horizontal-collector 

wells are in the Northwest Well Field. Adequate quantities of generally high-quality water have been 

obtained from the alluvial aquifer since the resource 

was developed in 1962. Increasing population and 

industrial development have increased the demand for 

municipal water. Cedar Rapids pumped about 8,487 

million gallons (Mgal) from the alluvial aquifer in 

1980, about 9,118 Mgal in 1990, and about 13,140 

Mgal in 1997 (Bob Glass, City of Cedar Rapids Water 

Department, oral commun., 1998).

The City of Cedar Rapids and the U.S. Geological Survey (USGS) have conducted a cooperative study 

of the ground-water flow system and water quality near 

the well fields since 1992. Schulmeyer (1995) analyzed the influence of the Cedar River on the quality of 

ground water near the municipal well fields. SchnoeABSTRACT
Index map

Base from U.S. Geological Survey digital data, 1:100,000.1991 

Universal Transverse Mercator projection. 

Zone 15

1/2 1MILE

1 KILOMETER

Figure 1. Location of the Cedar Rapids, Iowa, municipal well fields.

SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
belen and Schulmeyer (1996) documented hydrogeologic data collected and compiled from October 1992 

to March 1996. Schulmeyer and Schnoebelen (1998) 

described the hydrogeology near the municipal well 

fields, documented a ground-water flow model constructed to simulate regional ground-water flow under 

steady-state conditions and identify sources of water to 

the municipal well fields, and assessed temporal and 

spatial variations of selected water-quality constituents 

and properties. Boyd (1998) characterized groundwater flow near the municipal well fields with selected 

environmental isotopes and tracers. Boyd (1999) evaluated the occurrence and distribution of selected herbicide and herbicide degradate concentrations in the 

alluvial aquifer and Cedar River following springtime 

application of herbicides to upstream cropland.

Purpose and Scope

The purpose of this report is to document 

selected hydrologic data collected from April 1996 

through March 1999 for the cooperative study of the 

Cedar Rapids municipal well fields being conducted by 

the City of Cedar Rapids and the USGS. Data presented in this report include the results of water-quality 

analyses, ground-water levels continuously measured 

with pressure transducers and data recorders, and physical properties continuously monitored with multiprobe 

instruments.

Description of Study Area

Cedar Rapids is in east-central Iowa and has a 

population of about 110,000. Upland topography is 

characterized by rolling hills of low relief. Upstream 

land use in the Cedar River basin is more than 80 percent agricultural; corn and soybeans are the predominant crops. Livestock raised in the area primarily 

include beef and dairy cattle, hogs, and sheep (Squillace and others, 1996). Iowa has a typical continental, 

subhumid climate. Air temperatures generally range 

from -18° F in winter to 100° F in summer. The average annual precipitation is about 36 inches, with the 

greatest amounts occurring from May to August 

(Schulmeyer and Schnoebelen, 1998). The Cedar 

River Basin drains an area of about 6,510 square miles 

upstream from the streamflow gaging station at Cedar 

Rapids (Cedar River at Cedar Rapids, USGS station

number 05464500). The annual mean flow recorded at 

the gaging station from 1903-1998 was 3,711 cubic feet 

per second (ft3/s). Extreme daily mean flows in the 

Cedar River during this period of record were 

71,500 ft3/s (March 31,1961) and 140 ft3/s (November 

18,1989) (May and others, 1999).

Hydrogeologic units near the well fields consist 

of an unconsolidated surficial layer of glacial till, loess, 

and the Cedar River alluvium (alluvial aquifer), underlain by carbonate bedrock of Devonian and Silurian age 

(bedrock aquifer). The glacial till and loess form 

upland areas that bound the alluvial aquifer. The alluvial aquifer ranges in thickness from 5 to 95 ft near the 

well fields. The alluvial aquifer consists of a sequence 

of coarse sand and gravel at the base, grading upward 

to fine sand, silt, and clay near the surface. The bedrock aquifer has a maximum thickness of about 700 ft 

near the well fields. The bedrock aquifer primarily 

consists of jointed and fractured limestone and dolomite, with some interbedded chert and shale (Schulmeyer and Schnoebelen, 1998). The unconsolidated 

surficial layers, carbonate bedrock of Devonian and 

Silurian age, and deeper hydrogeologic units are 

described in detail by Hansen (1970), Wahl and Bunker 

(1986) and Schulmeyer and Schnoebelen (1998).

The alluvial aquifer near the well fields is 

recharged by infiltration from the Cedar River induced 

by pumping of municipal supply wells, infiltration of 

precipitation, and ground-water flow from adjacent 

hydrogeologic units. Recharge also can occur during 

periods of high river stage, when river water can move 

into the alluvial aquifer because of the head difference 

between the river and aquifer or when flood waters 

inundate low-lying areas adjacent to the Cedar River 

(Schulmeyer and Schnoebelen, 1998). In areas influenced by the pumping of municipal supply wells, the 

water-table gradient is from the Cedar River to the alluvial aquifer. In areas outside the influence of municipal 

pumping, the water-table gradient generally is toward 

the Cedar River, although the gradient can reverse during periods of high river stage (Schulmeyer and 

Schnoebelen, 1998). Results from a regional groundwater flow model constructed by Schulmeyer and 

Schnoebelen (1998) indicated that about 74 percent of 

water pumped from the alluvial aquifer is induced from 

the Cedar River, about 21 percent of the water is flow 

from adjacent and underlying hydrogeologic units, and 

about 5 percent of the water is recharge from infiltrating precipitation. The bedrock aquifer is recharged by 

downward leakage from the overlying unconsolidated

INTRODUCTION
surficial layer and by infiltrating precipitation on outcrop areas distant from the study area. The bedrock 

aquifer is not used as a municipal water supply but is 

used for private residential and industrial water supplies.

METHODS OF INVESTIGATION

Data were collected from a network of observation wells within the municipal well fields, the Cedar 

River, and the J-Avenue waterworks plant. The data 

include water-quality analyses, continuously measured 

ground-water levels in selected wells, and continuously 

monitored physical properties in selected observation 

wells and the Cedar River. The locations of sampling 

sites are shown in figure 2 and figure 3. Well construction information for the sampling and measurement 

sites is listed in table 1.

Well Construction and Nomenclature

Data were collected from small-diameter wells 

(0.14-inch outer-diameter tubing), 2-inch outer-diameter observation wells, and 4-inch outer-diameter observation wells. The observation wells are named 

according to a convention that includes the year the 

well was installed, the agency identifier, USGS, the 

local project identifier, CRM (Cedar Rapids Municipal), and a unique incremental number (for example, 

1993USGS CRM-1). Small-diameter well names also 

include the identifier SD (for example, 1996USGS 

CRM-SD-60). For convenience in this report, the year 

and agency identifier will not be included when referring to a site name, however, the map identification 

number listed in table 1 will be included with the site 

name so the reader can easily locate the well in figure 

2 and figure 3. The observation wells were surveyed 

using a combination of a Global Positioning System 

and conventional surveying techniques to determine 

location (latitude and longitude) and to establish vertical control referenced to sea level. Observation-well 

data are stored in the USGS Ground Water Storage 

Information (GWSI) database. The observation wells 

and measurement sites were assigned a unique 15-digit 

site-identification number in GWSI that is based on the 

latitude and longitude of the site (for example, the 

15-digit site-identification number for 1993USGS 

CRM-1 is 415949091405401). The first six digits designate the latitude (41°59'49") of the site, the next

seven digits designate the longitude (091°40'54") of 

the site, and the last two numbers (01) are sequential 

numbers to differentiate between individual sites at the 

same latitude and longitude.

Small-diameter wells were installed in the alluvial aquifer by drilling a pilot borehole with a 9-foot 

long, 1.25-inch outer-diameter solid-stem auger. A 

3-inch long, stainless-steel sandpoint attached to 

0.14-inch outer-diameter Teflon tubing was advanced 

inside a 0.875-inch outer-diameter drill rod driven to 

the desired depth with a portable hammer drill. Teflon 

tubing extending above ground surface was protected 

with 1-inch outer-diameter poly vinyl-chloride (PVC) 

pipe. Two-inch and 4-inch observation wells were 

installed by drilling boreholes with continuous-flight, 

hollow-stem augers. Boreholes for 2-inch wells were 

installed with 4.25-inch inner-diameter augers; boreholes for 4-inch wells were installed with 6.25-inch 

inner-diameter augers. Wells were completed with 

2-inch or 4-inch outer-diameter PVC casing with 2.5- 

foot or 5.0-foot long screened intervals above the bottom of the borehole. Aquifer material was allowed to 

collapse around the screened interval and the remaining annular space was sealed with bentonite and capped 

with cement and a protective cover. The observation 

wells at CRM-6 (map ID #5), CRM-7 (map ID #6), 

CRM-11 (map ID #9), and CRM-12 (map ID # 10) 

were installed in the bedrock aquifer using direct mudrotary drilling. Boreholes were drilled about 15 to 20 

ft into the bedrock aquifer at each location. These 

wells were completed with 4-inch outer-diameter PVC 

casing with a 5-foot long screened interval above the 

bottom of the borehole. The annular space around the 

screened interval was filled with a washed sand pack 

and sealed with about 5 ft of bentonite to the top of the 

bedrock surface. The remaining annular space was 

filled with a bentonite/cement grout and capped with 

cement and a protective cover.

Water Quality

Water-quality samples were collected from 

small-diameter wells, 2-inch and 4-inch diameter 

observation wells, the Cedar River at Edgewood Road 

(map ID # 31), and the J-Avenue Waterworks Plant 

(map ID # 30). Ground-water samples were collected 

with a stainless-steel submersible pump after pumping 

about three borehole volumes of water from 2-inch and 

4-inch observation wells and after pumping smallSELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
EXPLANATION

Extent of municipal well field Seminole Valley 

Road

Observation well or measurement 

site with map ID number (table 1)

Municipal well

Seminole 

well field

25, 26, 27,

28,29

Northwest 

well field

Base from U.S. Geological Survey digital data, 1:100,000,1991 

Universal Transverse Mercator projection, 

Zone 15

Figure 2. Sample collection and measurement sites in the Seminole and Northwest well fields, 

Cedar Rapids, Iowa, April 1996 through March 1999.

2000 FEET 

500 METERS

METHODS OF INVESTIGATION 5
31 /West well field

9

East well field

EXPLANATION

| | Extent of municipal well field U.S. Geological Survey 

stream-gaging station 

Observation well 05464500 or measurement 

site with map ID number (table 1)

Municipal well

Base from U.S. Geological Survey digital data, 1:100,000,1991 

Universal Transverse Mercator projection. 

Zone 15 500 1000 1500 METERS

Figure 3. Sample collection and measurement sites near the East and West well fields, Cedar Rapids, Iowa, 

April 1996 through March 1999.

SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
diameter wells for about 20 minutes with a peristaltic 

pump. Surface-water samples were collected from the 

Cedar River with a stainless-steel submersible pump 

that was extended into the river from the riverbank. 

Samples of untreated municipal water were collected 

from a tap at the J-Avenue Waterworks Plant (map ID 

# 30). Dissolved inorganic-constituent samples were 

collected through an inline 0.45-micrometer ((J,m) 

pore-size, cellulose-fiber filter. Pesticide and herbicide 

degradate samples were collected through an inline 

0.7-jl.m pore-size, glass-fiber filter. Dissolved organiccarbon samples were filtered in the field immediately 

after collection through a 0.45-(0,m silver-membrane 

filter.

Water samples were collected for analyses of 

common ions (calcium, chloride, iron, magnesium, 

manganese, potassium, silica, sodium, and sulfate); 

trace elements (boron, bromide, and fluoride); nutrients 

(ammonia as nitrogen (N), nitrite as N, nitrite plus 

nitrate as N, and orthophosphate as phosphorus); dissolved organic carbon; and selected pesticides. Water 

samples were analyzed by the USGS National WaterQuality Laboratory in Arvada, Colorado using procedures documented by Fishman and Friedman (1989). 

Some samples collected from June through August 

1998 were analyzed for selected pesticides and chloroacetanilide and triazine herbicide degradates by the 

USGS Organic Geochemistry Research Laboratory in 

Lawrence, Kansas using procedures documented by 

Zimmerman and Thurman (1999).

Field-replicate samples and field-blank samples 

were collected for quality control. A field-replicate 

sample or field-blank sample was collected approximately every 10 samples. Field-replicate samples are 

collected to assess precision of laboratory analytical 

methods and consistency of sample-collection and 

sample-handling procedures. Field-replicate samples 

were collected simultaneously with ground-water and 

surface-water samples. Field-blank samples consisted 

of organic-free deionized water that was passed 

through the pump and sampling equipment to evaluate 

the cleanliness of sampling equipment and sampling 

techniques. Quality-control sample analyses indicate 

minimal variability in laboratory analytical methods 

and that sample-collection and sample-handling techniques did not affect the water-quality samples.

Ground-Water Levels

Water levels in selected 2-inch and 4-inch observation wells were continuously measured with pressure 

transducers and data recorders. Data were recorded at 

hourly intervals. Barometric pressure was recorded at 

site CRM-15 (map ID # 12) in the Seminole Well Field. 

Water-levels measured with pressure transducers were 

corrected for changes in barometric pressure. The 

water levels measured by pressure transducers were 

verified about every two weeks by manually measuring 

water levels in each observation well to the nearest 0.01 

ft using either a calibrated steel tape or calibrated electric tape. Water levels were measured according to protocols documented in U.S. Office of Water-Data 

Coordination (1977).

Physical Properties

Dissolved oxygen, pH, specific conductance, 

and water temperature were continuously monitored 

with multiprobe instruments installed in selected 

4-inch diameter observation wells and in the Cedar 

River near the Seminole Well Field at site SW-2 (map 

ID # 32). The multiprobe instrument used to monitor 

physical properties in the Cedar River was installed in 

a 6-inch diameter pipe that extended from the river 

bank into the river. Measurements generally were 

recorded at 60-minute intervals and the data were 

retrieved at about monthly intervals. During winter 

months, data were retrieved from the Cedar River multiprobe less frequently because the instrument could 

not be retrieved when ice formed in the 6-inch diameter 

pipe. Measurements in the river were recorded at 

3-hour intervals during winter months. The multiprobes were calibrated each time data were retrieved by 

using specific conductance and pH standards obtained 

from the USGS NWQL. In addition to multiprobe 

measurements, water temperature also was continuously monitored in 2-inch diameter observation wells 

equipped with pressure transducers and data recorders 

used to continuously measure ground-water levels.

SELECTED HYDROLOGIC DATA

The types of data and the sampling and measurement period at each site are summarized in table 2. 

Water-quality analyses are listed in tables 3 through 9. 

Mean daily ground-water levels in observation wells

SELECTED HYDROLOGIC DATA
equipped with pressure transducers and data recorders 

are listed in table 10. Physical properties continuously 

monitored in selected observation wells and the Cedar 

River are listed in tables 11 through 14. All reported 

data are stored in the USGS National Water Information System database.

Water-Quality Data

Water-quality samples were collected from 

selected observation wells and the Cedar River at 

Edgewood Road (map ID # 31) from April 1996 to 

March 1999 to conduct periodic monitoring, to evaluate ground-water geochemistry, to assess the occurrence of pesticides and herbicide degradates in the 

alluvial aquifer, and to characterize water quality in 

shallow ground water near a wetland area in the Seminole Well Field. Samples collected from observation 

wells CRM-14 (map ID #11), CRM-15 (map ID #12), 

CRM-16 (map ID #13), CRM-17 (map ID #14), CRM18 (map ID #15), CRM-19 (map ID #16), CRM-SD-60 

(map ID #25), CRM-SD-61 (map ID #26), CRM-SD62 (map ID #27), CRM-SD-63 (map ID #28), and 

CRM-SD-64 (map ID #29) were used to evaluate 

ground-water geochemistry (samples collected in September 1996 and May 1997) and to assess the occurrence of pesticides and herbicide degradates (samples 

collected from June 1998 through August 1998) in the 

alluvial aquifer near the Seminole Well Field. Samples 

collected from observation wells CRM-22 (map ID 

#19), CRM-23 (map ID #20), CRM-24 (map ID #21), 

CRM-25 (map ID # 22), CRM-26 (map ID #23), and 

CRM-27 (map ID # 24) were collected to characterize 

water quality in shallow ground water near a wetland 

area in the Seminole Well Field. Samples collected 

from the remaining observation wells and the Cedar 

River at Edgewood Road (map ID #31) primarily were 

collected for periodic monitoring. Common-ion, traceelement, and nutrient concentrations in water samples 

collected from April 1996 through March 1999 are 

summarized in table 3. Pesticide concentrations in 

water samples collected from April 1996 through 

March 1999 are summarized in table 4. Common-ion 

and trace-element concentrations in water samples are 

listed in table 5. Nutrient and dissolved organic-carbon 

concentrations in water samples are listed in table 6. 

Pesticide concentrations in water samples are listed in 

table 7. Concentrations of ethanesulfonic-acid and 

oxanilic-acid degradates of acetanilide herbicides in

water samples collected from June 1998 to August 

1998 are listed in table 8 and table 9, respectively.

Ground-Water Levels

Mean daily ground-water levels in observation 

wells equipped with pressure tranducers and data 

recorders are listed in table 10. Data were not recorded 

for some time periods because of instrument malfunction or data recorders were removed during periods of 

flooding.

Physical Properties

Mean daily specific-conductance values are 

listed in table 11. Mean daily pH values are listed in 

table 12. Mean daily dissolved-oxygen concentrations 

are listed in table 13. Mean daily ground-water temperatures and the mean daily water temperature in the 

Cedar River are listed in table 14. Water temperatures 

measured at sites with multiprobe instruments and in 

observation wells equipped with pressure transducers 

and data recorders are listed in table 14. The mean 

daily specific conductance in ground water ranged 

between 149 microsiemens per centimeter (|J,S/cm) at 

CRM-25 (map ID #22) on April 2, 1998 and 

850 |j,S/cm at CRM-1 (map ID # 1) on January 22,1997. 

The mean daily specific conductance in the Cedar 

River at site SW-2 (map ID #32) ranged between 

202 |j,S/cm on February 23, 1997 and 651 |J,S/cm on 

January 1, 1999. The mean daily pH in ground water 

ranged between 6.5 at CRM-2 (map ID #2) on April 1- 

2, 1996 and 8.5 at CRM-2 (map ID #2) on June 10-12, 

1997. The mean daily pH in the Cedar River at site 

SW-2 (map ID #32) ranged between 7.3 on June 21, 

1998 and 9.3 on October 6, 1997 and October 10-11, 

1997. The mean daily dissolved-oxygen concentration 

in ground water ranged between 0 milligrams per liter 

(mg/L) at CRM-21 (map ID #18) in June, July, October, and November 1998 and 12.6 mg/L at CRM-21 on 

February 27, 1999. The mean daily dissolved-oxygen 

concentration in the Cedar River at site SW-2 (map ID 

#32) ranged between 1.7 mg/L on May 6, 1996 and 

17.4 mg/L on December 4, 1996.

New multiprobe instruments were purchased in 

the fall of 1997 to upgrade and replace older instruments. Data were collected with the older instruments 

at sampling sites CRM-1 (map ID #1), CRM-2 (map ID

SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
ff2), CRM-11 (map ID #9), CRM-12 (map ID #10) 

through July 1997 and in the Cedar River at site SW-2 

(map ID #32) until February 1998. All dissolvedoxygen measurements at sites CRM-1 (map ID #1) and 

CRM-11 (map ID #9) were rejected after data review 

because the multiprobe instruments at these sites 

exhibited large drift after calibration. The new multiprobe instruments were installed in February 1998 in 

the Northwest Well Field at sites CRM-20 (map ID 

#17) and CRM-21 (map ID #18), in the Seminole Well 

Field at sites CRM-22 (map ID #19) and CRM-23 (map 

ID #20), and in the Cedar River near the Seminole Well 

Field at site SW-2 (map ID #32).

REFERENCES CITED

Boyd, R.A., 1998, Characterizing ground-water flow in the 

municipal well fields of Cedar Rapids, Iowa, with 

selected environmental tracers: Journal of the American Water Resources Association, vol. 34, no. 3, 

pp. 507-518.

Boyd, R.A., 1999, Herbicides and herbicide degradates in 

shallow ground water and the Cedar River near a 

municipal well field, Cedar Rapids, Iowa: Proceedings 

of the U.S. Geological Survey Toxic Substances 

Hydrology Program 1999 Technical Meeting.

Fishman, M.J. and Friedman, L.C., 1989, Methods for determination of inorganic substances in water and fluvial 

sediments (3rd ed.): U.S. Geological Survey Techniques of Water-Resources Investigations, book 5, 

chapter Al, 545 p.

Hansen, R.E., 1970, Geology and ground-water resources of 

Linn County, Iowa: Iowa Geological Survey, WaterSupply Bulletin number 10, 66 p.

May, J.E., Gorman, J.G., Goodrich, R.D., Miller, V.E.,

Turco, M.J., and Linhart, S.M., 1999, Water resources 

data, Iowa Water Year 1998, Volume 1, Mississippi 

River Basin: U.S. Geological Survey Water-Data 

Report IA-98-1,374 p.

Schnoebelen, D.J. and Schulmeyer, P.M., 1996, Selected 

hydrogeologic data from the Cedar Rapids area, Benton 

and Linn Counties, Iowa, October 1992 through March 

1996: U.S. Geological Survey Open-File 

Report 96-471, 172 p.

Schulmeyer, P.M., 1995, Effect of the Cedar River on the 

quality of the ground-water supply for Cedar Rapids, 

Iowa: U.S. Geological Survey Water-Resources 

Investigations Report 94-4211, 68 p.

Schulmeyer, P.M. and Schnoebelen, D.J., 1998, Hydrogeology and water quality in the Cedar Rapids area, Iowa, 

1992-96: U.S. Geological Survey Water-Resources 

Investigations Report 97-4261, 77 p.

Squillace, P.J., Caldwell, J.P., Schulmeyer, P.M., and Harvey, 

C.A., 1996, Movement of agricultural chemicals 

between surface water and ground water, Lower Cedar 

River Basin, Iowa: U.S. Geological Survey WaterSupply Paper 2448, 59 p.

U.S. Office of Water-Data Coordination, 1977, National 

handbook of recommended methods for water-data 

acquisition: Reston, Virginia, Office of Water-Data 

Coordination, Geological Survey, U.S. Department of 

the Interior, chap. 2, p. 8-10.

Wahl, K.D. and Bunker, B.J., 1986, Hydrology and carbonate aquifers in southwestern Linn County and adjacent 

parts of Bemton, Iowa, and Johnson Counties, Iowa: 

Iowa Geological Survey, Water Supply Bulletin number 

15, 56 p.

Zimmerman, L.R. and Thurman, E.M., 1999, Method of 

analysis by the U.S. Geological Survey Organic 

Geochemistry Research Group-Determination of triazine and chloroacetanilide herbicides in water by solidphase extraction and capillary-column gas chromatography/mass spectrometry with selected ion monitoring: 

U.S. Geological Survey Open-File Report 98-634, 21 p.

REFERENCES CITED
(0

m

Table 1 . Information for observation wells and sampling sites near the Cedar Rapids, Iowa, municipal well fields, April 1996 t

[Map ID, number assigned to identify site locations in figure 2 and figure 3; N/A, not applicable]

CTED HYDROLOGI

O

I n

33 

0

S

H 

I

m

0

m

D

33 

33

^

o

(0

33

m

Map ID

1

2 

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Site name

1993USGS CRM-1

1993USGS CRM-2 

1993USGS CRM-3

1993USGS CRM-4

1993USGSCRM-6

1994USGS CRM-7

1994USGS CRM-9

1994USGSCRM-10

1993USGSCRM-11

1993USGSCRM-12

1996USGS CRM-14

1996USGSCRM-15

1996USGSCRM-16

1996USGSCRM-17

1996USGSCRM-18

1996USGSCRM-19

1997USGS CRM-20

1998USGS CRM-21

1998USGS CRM-22

1998USGSCRM-23

Station number

415949091405401

420033091420301 

415953091435001

415953091435301

415954091435301

420032091424701

420032091424901

420030091424601

420033091420302

415949091405402

420031091441802

420031091441801

420019091442502

420019091442501

420014091442701

420013091442801

415954091440301

415951091440501

420013091431001

420015091431301

Latitude

41°59'49"

42°00'33" 

41°59'53"

41°59'53"

41°59'54"

42°00'32"

42°00'32"

42°00'30"

42°00'33"

41°59'49"

42°00'31"

42°00'31"

42°00'19"

42°00'19"

42°00'14"

42°00'13"

41°59'54"

41°59'51"

42°00'13"

42°00'15"

Longitude

91°40'54"

91°42'03" 

91°43'50"

91°43'53"

91°43'53"

91°42'47"

91°42'49"

91°42'46"

91°42'03"

91°40'55"

91°44'18"

91°44'18"

91°44'25"

91 044' 25"

91°44'77"

91°44'28"

91°44'03"

91°44'05"

91°43'10"

91°43'13"

Land-surface 

elevation 

(feet above 

mean sea 

level)

721.26

719.52 

726.71

726.45

726.51

720.38

720.55

720.65

719.24

721.99

730

730

725

725

723

723

720

720

720

722

Total depth 

(feet below 

land 

surface)

42.5

42.5 

42.5

42.5

94.0

84.0

37.5

38.5

85.0

75.0

27.5

18.0

40.0

20.0

42.5

42.5

42.5

42.5

22.5

27.0
Table 1 . Information for observation wells and sampling sites near the Cedar Rapids, Iowa, municipal well fields, April 1996 

Map ID

21

22

23

24

25

26

27

28

29

30

31

32

Site name

1998USGS CRM-24

1998USGS CRM-25

1998USGS CRM-26

1998USGS CRM-27

1996USGS CRM-SD-60

1996USGS CRM-SD-61

1996USGS CRM-SD-62

1996USGS CRM-SD-63

1996USGS CRM-SD-64

J-Avenue Waterworks Plant

Cedar River at Edgewood Road

1996USGS SW-2

Station number

420014091431101

420012091432601

420018091430801

420009091432101

420012091442801

420012091442802

420012091442803

420012091442804

420012091442805

420002091403200

05464480

415953091435300

Latitude

42°00'14"

42°00'12"

42°00'18"

42°00'09"

42°00'12"

42°00'12"

42°00'12"

42°00'12"

42°00'12"

42°00'02"

42°00'42"

41°59'53"

Longitude

91°43'11"

91°43'26"

91°43'08"

91°43'21"

91°44'28"

91°44'28"

91°44'28"

91°44'28"

91°44'28"

91°40'32"

91°42'17"

91°43'53"

Land-surface 

elevation 

(feet above 

mean sea 

level)

720

725

722

722

720

720

720

720

720

745

720

726.5

Total depth 

(feet below 

land 

surface)

47.0

18.0

23.0

23.0

9.0

12.5

16.0

19.0

22.0

N/A

N/A

N/A

m
(0

m

Table 2. Types of data collected at sampling and measurement sites near the Cedar Rapids, Iowa, municipal well fields, April 19

March 1999

[C, common ions and trace elements; N, nutrients; P, pesticides, DO, dissolved oxygen; SC, specific conductance; T, water temperature; D, herbicide degradates

ECTED HYDR

O

O 

O

0

D

 n

30O

2

H

m

Om

D

30

30

 o

5

30m

Site name 

(with map ID from table 1)

1993USGS CRM-1 (1)

1993USGS CRM-2 (2)

1993USGS CRM-3 (3)

1993USGS CRM-4 (4)

1993USGS CRM-6 (5)

1994USGS CRM-7 (6)

1994USGS CRM-9 (7)

1994USGS CRM-1 0(8)

1993USGS CRM-1 1(9)

1993USGSCRM-12(10)

Type of waterquality samples

C,N,P

C,N,P

C,N,P

C, N,P

C,N,P

C,N,P

C,N,P

C,N,P

C,N,P

C,N,P

Number of 

water-quality 

samples

13

9

3

12

3

3

4

2

3

8

Measurement period for 

ground-water levels

April 1996-February 1999

April 1996-February 1999

January 1997-February 1999

January 1997- June 1998

January 1997-February 1999

January 1997-February 1999

January 1997-February 1999

~

April 1996-February 1999

April 1996-February 1999

Type of physical 

properties

DO, pH, SC

T

DO, pH, SC

T

T

T

T

T

T

-

DO, pH, SC

T

DO, pH, SC

T

A

A

A

A

Ja

Ja

Ja

Ja

Ja

~

A

A

A

A

1996USGSCRM-14(11) 

1996USGSCRM-15(12) 

1996USGSCRM-16(13) 

1996USGS CRM-17 (14) 

1996USGSCRM-18(15)

1996USGS CRM-19 (16) 

1997USGS CRM-20 (17) 

1998USGS CRM-21 (18) 

1998USGS CRM-22 (19) 

1998USGS CRM-23 (20)

C.N.P

C, D, N, P

C, D, N, P

C, D, N, P

C, D, N, P

C, D, N, P

C,N,P

C,N,P

C.N.P

C,N,P

1

5

5

5

5

5

2

1

2

2

January 1997-February 1999 

January 1997-February 1999 

November 1997-September 1998 

January 1997-February 1999

January 1997-February 1999

February 1998-February 1999 

February 1998-February 1999

T Ja

T Ja

T N

T Ja

T Ja

DO, pH, SC, T Fe

DO, pH, SC, T Fe

DO, pH, SC, T Fe

DO, pH, SC, T Fe
Table 2. Types of data collected at sampling and measurement sites near the Cedar Rapids, Iowa, municipal well fields, April 19

March 1999-Continued

Site name 

(with map ID from table 1 )

1998USGSCRM-24(21)

1998USGSCRM-25(22)

1998USGSCRM-26(23)

1998USGS CRM-27 (24)

1996USGSCRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J-Avenue Waterworks Plant (30)

Type of waterquality samples

C,N,P

C,N,P

C,N,P

C,N,P

C,N,P

C, D, N, P

C, D, N, P

C.N.P

C,D,N,P

C,N,P

Number of 

water-quality 

samples

2

2

2

2

1

4

5

2

6

17

Measurement period for 

ground-water levels

February 1998-February 1999

February 1998-February 1999

~

February 1998-February 1999

-

~

~

-

-

Type of physical 

properties 

T Fe

SC, T Fe

-

SC, T Fe

-

..

--

~

-

Cedar River at Edgewood Road (31) C, D, N, P 

1996USGSSW-2(32)

17

DO, pH, SC, T Ap
Table 3. Summary of common-ion, trace-element, and nutrient concentrations in water samples collected from the Cedar 

Rapids, Iowa, municipal well fields and Cedar River, April 1996 through March 1999

[mg/L, milligrams per liter, ug/L, micrograms per liter; <, less than]

Constituent

Calcium

Chloride

Magnesium

Potassium

Silica

Sodium

Sulfate

Boron

Bromide

Units

mg/L as Ca

mg/L as Cl

mg/L as Mg

mg/L as K

mg/L as SiC>2

mg/L as Na

mg/L as SO4

M-g/L as B

mg/L as Br

Sample 

medium

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Number of Mean 

samples concentration

Common ions

75

16

12

75

16

12

75

16

12

75

16

12

75

16

12

75

16

12

75

16

12

Trace elements

65

8

10

75

16

12

77

69

63

21

17

23

21

23

21

3.0

2.5

2.5

14

16

8.1

11

10

10

30

14

33

34

41

29

0.06

0.04

0.02

Minimum 

concentration

49

49

27

1.2

0.50

16

8.4

15

15

0.80

0.90

1.9

5.0

12

0.07

3.2

3.6

5.8

<0.10

3.1

19

20

21

22

<0.01

<0.01

<0.01

Maximum 

concentration

140

80

80

31

34

27

46

28

24

8.2

3.6

3.5

25

20

14

24

16

15

150

30

41

86

49

35

0.70

0.10

0.06

14 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 3. Summary of common-ion, trace-element, and nutrient concentrations in water samples collected from the 

Cedar Rapids, Iowa, municipal well fields and Cedar River, April 1996 through March 1999-Continued

Constituent Units

Sample 

medium

Number of 

samples

Mean 

concentration

Minimum 

concentration

Maximum 

concentration

Trace elements Continued

Fluoride

Iron

Manganese

mg/LasF

jig/L as Fe

jig/L as Mn

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

75

16

12

75

16

12

75

16

12

0.21

0.23

0.24

2,460

2,000

10

1,200

627

14

<0.10

0.10

0.19

<3.0

7.0

4.4

<1.0

. 2.0

<3.0

0.33

0.30

0.30

20,000

4,200

32

7,500

2,200

60

Nutrients and organic carbon

Nitrogen, ammonia

Nitrogen, nitrite

Nitrogen, nitrite 

plus nitrate

Organic carbon

Orthophosphate

mg/L as N

mg/LasN

mg/L as N

mg/L as C

mg/L as P

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

70

11

10

70

11

10

70

11

10

76

16

12

69

11

10

1.5

2.3

0.16

0.02

<0.01

0.03

1.6

0.04

5.5

2.4

1.5

2.9

0.06

0.01

0.06

<0.015

0.05

<0.015

<0.01

<0.01

0.01

<0.05

<0.05

0.05

0.50

0.40

2.1

<0.01

<0.01

<0.01

9.8

4.3

0.95

0.19

<0.01

0.09

10.2

0.08

11.0

6.4

2.9

4.4

0.40

0.05

0.15

TABLES 15
Table 4. Summary of pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well 

fields and Cedar River, April 1996 through March 1999

[All concentration in micrograms per liter; MRL, minimum reporting limit; --, not applicable]

Constituent

Acetochlor

Alachlor

Ametryn

Atrazine

Butachlor

Butylate

Bromacil

Carboxin

Cyanazine

Sample 

medium

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Number of 

samples

92

9

15

101

16

17

101

16

17

101

16

17

66

9

10

66

9

10

66

9

10

66

9

10

101

16

17

Number of 

concentrations 

greater than 

MRL

10

0

4

0

0

1

0

0

0

81

8

17

1

0

0

0

0

0

0

0

0

0

5

0

7

0

1

Minimum Maximum 

MRL concentration concentration

0.05 0.06 0.17

--

0.15 1.17

0.05

--

0.16

0.05

--

--

0.05 0.05 2.7

0.05 0.09

0.05 8.2

0.05 - 0.05

--

--

0.05

--

--

0.05

--

--

0.05

0.05 0.06

--

0.20/0.05 0.05 0.50

0.74

16 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 4. Summary of pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well 

fields and Cedar River, April 1996 through March 1999,-Continued

Constituent

Deethylatrazine

Deisopropylatrazine

Diphenamid

Hexazinone

Metolachlor

Metribuzin

Prometon

Prometryn

Propachlor

Propazine

Sample 

medium

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Number of 

samples

101

16

17

101

16

17

66

9

10

66

9

10

101

16

17

101

16

17

99

16

17

101

16

17

91

9

15

101

16

17

Number of 

concentrations 

greater than 

MRL MRL

70 0.05

0

16

32 0.05

0

10

0 0.05

0

0

2 0.05

0

0

58 0.05

1

15

6 0.05

0

2

0 0.05

0

1

0 0.05

0

0

0 0.05

0

0

0 0.05

0

0

Minimum Maximum 

concentration concentration

0.05 0.50

--

0.08 0.64

0.05 0.26

--

0.05 0.28

--

--

0.05 0.05

--

..

0.05 0.62

0.08

0.05 2.45

0.05 0.07

--

0.06 0.07

..

--

0.06

--

-

-

--

--

--

--

--

TABLES 17
Table 4. Summary of pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well 

fields and Cedar River, April 1996 through March 1999.--Continued

Constituent

Sicloate

Simazine

Simetryn

Terbacil

Terbutryn

Trifluralin

Vernolate

Sample 

medium

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Alluvium

Bedrock

Cedar River

Number of 

samples

66

9

10

101

16

17

66

9

10

66

9

10

25

0

5

66

9

10

66

9

10

Number of 

concentrations 

greater than 

MRL MRL

0 0.05

0

0

0 0.05

0

0

0 0.05

0

0

0 0.05

0

0

0 0.05

0

0

0 0.05

0

0

0 0.05

0

0

Minimum Maximum 

concentration concentration

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

..

--

--

18 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999

[Constituents listed with USGS parameter codes in parantheses; (ig/L, micrograms per her; mg/L, milligrams per liter; --, sample not analyzed for constituent; <, le

m 

to

Site name (with map 

ID from table 1)

Cedar River at Edgewood Road (31)

1993USGS CRM-1 (1)

Date 

(month, 

day, year)

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

Time 

(24-hour)

1415

1200

1220

1400

0915

0945

1400

1115

1400

1200

1205a

1215

1330

1125

1130a

0900

1200b

1040

1000

1100

1140

1330

1335a

1130

1130

1230

1030

Boron 

(01020) 

(\ig/L as B)

-

28

-

23

27

27

35

34

22

-

-

-

30

-

-

29

<16

32

-

21

-

42

49

28

27

24

30

Bromide 

(71870) 

(mg/L as Br)

<0.01

<0.01

0.02

0.01

0.03

<0.01

0.02

0.06

0.03

-

-

-

0.01

-

~

0.02

<0.01

0.06

0.04

0.09

0.37

0.02

0.03

0.30

0.02

0.13

0.04

Calcium 

(00915) 

(mg/L as Ca)

55

73

27

82

71

55

39

78

75

-

-

-

47

-

79

<0.02

80

62

70

80

130

130

77

68

61

63

Chloride 

(00940) 

(mg/L as Cl)

22

19

27

26

23

16

22

26

25

-

-

-

18

-

-

24

<0.10

25

25

23

26

24

24

24

25

21

22
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999--Continued

m

m 

0 

pjj Site name (with map

O ID from table 1)

< 1993USGS CRM-1 (l)-Continued

3)

0

0 

O

0 

§

§ 

 n

9

| 1993USGS CRM-2 (2)

H

m

0

m 

$

31

31

>"O 

D 

(0

> 

31m

>

1993USGSCRM-3(3)

1993USGS CRM-4 (4)

Date 

(month, 

day, year)

03-25-98 

08-19-98

11-16-98

03-03-99

08-26-96

12-11-96

05-30-97

08-20-97

11-06-97 

03-25-98 

08-19-98

11-17-98

03-03-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

Time 

(24-hour)

1315 

1250

0800

0830b

1020

1500

0840

1015 

1020b

1015

1330 

1050 

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

0900

0830

1240

Boron 

(01020) 

(ng/L as B)

35 

28

33

<16

35

-

28

56 

4.7

37

46 

42 

30

37

24

24

-

-

25

-

23

30

33

27

33

Bromide 

(71870) 

(mg/L as Br)

0.70 

0.05

0.05

<0.01

0.06

0.02

0.05

0.05 

<0.01

<0.02

0.21 

0.04 

0.04

0.05

0.03

0.04

0.03

0.04

0.03

0.02

0.03

0.04

0.06

0.04

0.02

0.05

Calcium 

(00915) 

(mg/L as Ca)

62 

67

69

0.71

66

49

130

93 

0.13

72

58 

64 

54

67

69

71

74

67

59

56

56

84

90

65

68

84

Chloride 

(00940) 

(mg/L as Cl)

31 

26

27

0.46

26

1.2

22

25 

<0.10

23

21

25 

22

22

23

24

22

21

20

18

25

25

23

22

19

20
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, muni

April 1996 through March 1999--Continued

DD

m

V) 

ro

Site name (with map 

ID from table 1)

1993USGS CRM-4 (4)~Continued

1993USGS CRM-6 (5)

1994USGS CRM-7 (6)

1994USGS CRM-9 (7)

1994USGSCRM-10(8)

1993USGSCRM-11 (9)

1993USGSCRM-12(10)

Date 

(month, 

day, year)

03-25-98

08-19-98

11-17-98

03-02-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

04-23-96

06-17-96

08-20-97

04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

Time 

(24-hour)

1200

1130

1000

1300

0930

0930

1200

1200

1200

0930

1300

1230

1235

1000

1345

1330

1130

1400

1100

0900

1030

1030

1035a

1230

1215

Boron 

(01020) 

(\ig/L as B)

34

48

--

24

-

47

~

~

-

-

-

20

-

-

--

23

22

21

-

49

-

--

46

48

Bromide 

(71870) 

(mg/L as Br)

0.05

0.03

-

0.04

0.02

0.02

0.03

0.02

-

<0.01

0.03

0.03

-

0.10

0.04

0.03

0.02

0.02

0.03

0.05

0.04

0.06

0.06

0.04

0.06

Calcium 

(00915) 

(mg/L as Ca)

89

58

-

84

59

60

55

73

~

71

120

120

-

120

140

110

52

49

54

80

78

74

74

84

80

Chloride 

(00940) 

(mg/L as Cl)

25

21

~

25

0.50

0.50

0.50

19

-

20

19

22

-

22

20

24

1.1

2.5

1.5

30

29

26

26

27

34
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, muni

April 1996 through March 1999-Continued

m

.ECTED HYDROLOGIC

O

£

 n

3

2

H

X

m

o 

m

0

3

 o 

o

>

3Jm

Site name (with map 

ID from table 1)

1993USGS CRM-12 (lO)-Continued 

1996USGSCRM-14(11)

1996USGSCRM-15(12)

1996USGS CRM-16 (13)

1996USGS CRM-17 (14)

1996USGSCRM-18(15)

Date 

(month, 

day, year)

06-25-97 

08-20-97

05-29-97

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1215 

1315

0900

0930

1000

1310

1450

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

1015

1400

0900

Boron 

(01020) 

(\iglL as B)

48 

44

25

26

30

-

._

-

40

20

-

-

33

22

-

-

~

29

36

-

-

__

Bromide 

(71870) 

(mg/L as Br)

0.03 

0.10

0.04

0.06

0.04

-

_

-

0.05

0.03

-

0.03

0.02

-

-

-

0.04

0.03

-

-

._

Calcium 

(00915) 

(mg/L as Ca)

78 

77

110

110

130

~

_

-

62

65

-

100

63

~

-

-

56

54

-

~

..

Chloride 

(00940) 

(mg/L as Cl)

34 

25

2.1

1.9

2.1

-

..

-

22

14

-

-

16

21

-

-

-

21

19

-

-

1996USGSCRM-19(16) 09-24-96 1300 39 0.05 49 24 
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munic

April 1996 through March 1999-Continued

DO

m

CO

Site name (with map 

ID from table 1)

1996USGS CRM-19 (16)-Continued

1997USGSCRM-20(17)

1998USGS CRM-21 (18)

1998USGSCRM-22(19)

1998USGSCRM-23(20)

1998USGSCRM-24(21)

1998USGS CRM-25 (22)

1998USGS CRM-26 (23)

1998USGS CRM-27 (24)

1996USGS CRM-SD-60 (25)

Date 

(month, 

day, year)

05-29-97

06-03-98

07-22-98

08-20-98

11-06-97

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

05-29-97

05-29-97

Time 

(24-hour)

1400

1120

1305

1100

1500b

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

1315

0945

1630

1610

Boron 

(01020) 

(\ig/L as B)

28

~

-

-

10

29

44

26

36

34

20

29

37

22

80

86

50

41

42

44

22

27

Bromide 

(71870) 

(mg/L as Br)

0.03

--

-

-

<0.01

0.04

0.03

0.04

0.05

0.05

0.05

0.04

0.04

0.04

0.03

0.03

0.04

0.03

0.04

0.03

0.02

0.02

Calcium 

(00915) 

(mg/L as Ca)

70

--

-

-

0.03

57

73

110

75

61

65

60

50

73

65

64

92

83

86

88

64

65

Chloride 

(00940) 

(mg/L as Cl)

22

-

-

-

<0.10

25

26

26

23

23

16

17

25

28

12

11

20

22

17

17

21

21
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munici

April 1996 through March 1999-Continued

.ECTED HYDROl

O 

O

O

|

 n

0

H

T

IE CEDAR

3J 

 o

IDS AREA

Site name (with map 

ID from table 1)

1996USGS CRM-SD-61 (26)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J-Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

06-03-98 

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98 

09-24-96

05-29-97

09-24-96 

05-29-97

06-03-98

07-22-98

08-20-98

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

Time 

(24-hour)

1345 

1100

1110

1445

1545

1315

1035

1055 

1430

1515

1415 

1415

1245

1125

1130a

1030

1500

1505a

1300

1320

1500

1300

1310

1315a

1515

Boron 

(01020) 

(ng/L as B)

:

-

40

27

~

46

36

40

32

-

~

~

-

-

-

65

-

40

78

102

97

39

Bromide 

(71870) 

(mg/L as Br)

-

0.06

0.03

-

0.04

0.09

0.03 

0.02

-

~

-

~

0.05

0.04

0.05

0.01

0.03

0.13

0.04

0.04

0.04

Calcium 

(00915) 

(mg/L as Ca)

:

-

62

63

-

52

70

53 

62

-

-

-

-

80

80

78

66

79

84

77

77

67

Chloride 

(00940) 

(mg/L as Cl)

;;

-

25

21

-

23

21

26 

21

~

-

-

-

23

24

25

23

24

29

22

23

22
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munic

April 1996 through March 1999-Continued

Site name (with map 

ID from table 1)

J-Avenue Waterworks Plant (30)~Continued

Date 

(month, 

day, year)

11-06-97

03-25-98

08-19-98

08-19-98

11-16-98

03-03-99

Time 

(24-hour)

1520a

0900

1430

1435a

1420

1430b

1100

1130

Boron 

(01020) 

(lig/L as B)

41

143

101

104

36

<16

46

81

Bromide 

(71870) 

(mg/L as Br)

0.03

0.09

0.05

0.04

0.04

<0.01

0.06

0.05

Calcium 

(00915) 

(mg/L as Ca)

68

87

85

85

72

<0.02

79

77

Chloride 

(00940) 

(mg/L as Cl)

21

30

27

27

21

<0.10

24

24
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munici

m

m0 

in Site name (with map 

2 ID from table 1)

^ Cedar River at Edgewood Road (31)

3)

0rO 

O

O

0

2 n 

3J

0

3,

H

m

o

m

p

3)

3)

TJ

6

0)

3)

>

1993USGS CRM-1 (1)

Date 

(month, 

day, year)

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

04-23-96

06-17-96

08-26-96

12-11-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

Time 

(24-hour)

1415

1200

1220

1400

0915

0945

1400

1115

1400

1200

1205a

1215

1330

1125

1130a

0900

1200b

1040

1000

1100

1140

1330

1335a

1130

1130

1230

1030

Magnesium 

(00925) 

(mg/L as Mg)

20

20

20

24

23

15

20

23

21

-

_

~

19

-

-

23

0.002C

23

17

20

26

43

43

27

23

18

22

Manganese 

(01056) 

(jig/L as Mn)

16

27

60

8.0

1.7

5.0

18

11

8.5

-

_

-

6.5

-

-

<3.0

<3.0

4.3

5,700

6,500

6,200

7,500

7,500

2,790

2,720

2,220

2,260

Potassium 

(00935) 

(mg/L as K)

3.0

2.2

3.0

2.1

2.1

3.5

2.6

2.3

1.9

-

_

~

3.2

--

--

2.0

<0.10

2.2

2.5

2.8

3.0

4.4

4.3

2.6

2.2

2.0

2.1

Silica 

(00955) 

(mg/L as SiO2)

0.070

9.8

1.3

13

5.9

12

1.5

9.7

9.9

-

_

-

8.2

-

-

14

<0.05

12

19

22

21

25

25

19

19

17

18
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munic

April 1996 through March 1999-Continued

Site name (with map 

ID from table 1)

1993USGS CRM-1 (l)-Continued

1993USGS CRM-2 (2)

1993USGS CRM-3 (3)

1993USGS CRM-4 (4)

Date 

(month, 

day, year)

03-25-98

08-19-98

11-16-98

11-16-98

03-03-99

08-26-96

12-11-96

05-30-97

08-20-97

11-06-97

03-25-98

08-19-98

11-17-98

03-03-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

Time 

(24-hour)

1315

1250

0800

0830b

1020

1500

0840

1015

1020b

1015

1330

1050

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

0900

0830

1240

Magnesium 

(00925) 

(mg/L as Mg)

18

21

21

0.22

21

15

42

31

0.011

22

19

21

19

21

24

20

21

20

24

17

15

21

29

19

16

25

Manganese 

(01056) 

(ng/L as Mn)

3,370

3,960

3,620

2.9C

3,070

53

2,500

1,590

<1.0

1,150

1,040

1,100

910

1,070

950

290

320

430

<1.0

<1.0

23

2.0

24

16

48

141

Potassium 

(00935) 

(mg/L as K)

3.6

3.6

3.7

<0.10

3.3

1.1

3.7

6.4

<0.10

3.6

3.9

4.0

3.0

5.1

2.5

3.2

3.3

3.2

2.1

8.2

6.7

2.2

2.8

2.1

3.6

3.0

Silica 

(00955) 

(mg/L as SiO2)

23

21

21

0.20

18

12

16

15

0.016

14

15

19

14

17

11

9.2

9.3

8.8

7.4

12

12

9.8

10

9.7

14

10
CO

m

Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munic

April 1996 through March 1999-Continued

ECTED h

O

3)

O

O 

O

O

§

g

 n

3)

O

H

m

o

m 

a

3)

3)

T3

O

CO

3)m

Site name (with map 

ID from table 1)

1993USGS CRM-4 (4)-Continued

1993USGSCRM-6(5)

1994USGS CRM-7 (6)

1994USGS CRM-9 (7)

1994USGSCRM-10(8)

1993USGSCRM-11(9)

1993USGSCRM-12(10)

Date 

(month, 

day, year)

03-25-98

08-19-98

11-17-98

03-02-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

04-23-96

06-17-96

08-20-97

04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

Time 

(24-hour)

1200

1130

1000

1300

0930

0930

1200

1200

1200

0930

1300

1230

1235

1000

1345

1330

1130

1400

1100

0900

1030

1030

1035a

1230

1215

Magnesium 

(00925) 

(mg/L as Mg)

28

17

-

22

22

23

23

22

_.

26

23

24

-

24

46

36

15

16

15

25

25

26

25

28

28

Manganese 

(01056) 

(tig/L as Mn)

368

305

~

438

3.0

3.0

2.0

2,200

1,700

1,600

1,400

-

1,600

100

170

55

140

56

680

720

890

860

830

616

Potassium 

(00935) 

(mg/L as K)

3.4

4.2

-

2.0

1.2

1.3

1.3

2.9

..

3.2

2.2

2.0

-

2.0

3.1

2.5

0.90

2.5

0.99

3.3

3.3

3.0

3.1

3.6

3.4

Silica 

(00955) 

(mg/L as SiO2)

9.4

12

-

7.5

13

14

13

15

14

20

21

--

20

11

10

12

13

12

18

18

18

18

20

19
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999--Continued

TABLES 2

Site name (with map 

ID from table 1)

1993USGS CRM-12 (lO)--Continued

1996USGSCRM-14(11)

1996USGSCRM-15(12)

1996USGSCRM-16(13)

1996USGS CRM-17 (14)

1996USGSCRM-18(15)

1996USGSCRM-19(16)

Date 

(month, 

day, year)

06-25-97

08-20-97

05-29-97

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96 

05-29-97 

06-03-98

Time 

(24-hour)

1215

1315

0900

0930

1000

1310

1450

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

1015

1400

0900

1300 

1400 

1120

Magnesium 

(00925) 

(mg/L as Mg)

27

24

15

8.4

10

-

~

-

18

14

~

-

~

26

17

-

-

-

18

17

-

-

-

15 

19

Manganese 

(01056) 

(ng/L as Mn)

664

612

91

1.0

<1.0

-

~

-

510

392

~

-

~

720

<1.0

~

-

~

410

410

~

~

-

140 

195

Potassium 

(00935) 

(mg/L as K)

3.0

2.9

1.1

0.80

0.85

~

~

-

1.5

1.6

--

-

-

5.1

4.5

--

-

--

1.4

1.3

~

-

~

4.2 

4.3

Silica 

(00955) 

(mg/L as SiO2)

17

18

22

24

22

-

-

~

15

7.4

-

--

~

16

10

-

-

~

11

12

-

~

-

11 

8.7
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999-Continued

m

ECTED h

O

3o

io

o

o

5

 n

$3

H

X

m

o

m

3D

3D

TJ

O

W

30

m

>

Site name (with map 

ID from table 1)

1996USGS CRM-19 (16) -Continued

1997USGSCRM-20(17)

1998USGSCRM-21(18)

1998USGSCRM-22(19)

1998USGS CRM-23 (20)

1998USGS CRM-24 (21)

1998USGS CRM-25 (22)

1998USGSCRM-26(23)

1998USGS CRM-27 (24)

1996USGS CRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

Date 

(month, 

day, year)

07-22-98

08-20-98

11-06-97

11-06-97

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

05-29-97

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1305

1100

1500b

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

1315

0945

1630

1610

1345

1100

1110

Magnesium 

(00925) 

(mg/L as Mg)

-

-

<0.10

31

24

16

30

20

17

16

21

31

12

12

22

22

19

20

19

15

--

-

__

Manganese 

(01056) 

(|j.g/L as Mn)

-

~

<1.0

380

389

<4.0

83

<3.0

56

23

362

292

19

2.7C

957

849

913

1,080

<1.0

163

-

-

Potassium 

(00935) 

(mg/L as K)

~

-

<0.10

2.7

2.3

1.0

3.0

1.5

1.9

1.8

1.8

1.6

2.1

1.8

3.5

2.8

3.7

3.5

2.0

2.1

-

-

__

Silica 

(00955) 

(mg/L as SiO2)

-

-

<0.10

5.4

5.0

12

11

8.6

12

10

12

6.3

14

12

15

13

14

13

6.3

10

-

-
Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, munic

April 1996 through March 1999--Continued

CD

m 

<n

CO

Site name (with map 

ID from table 1)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J-Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

09-24-96

05-29-97

06-03-98

07-22-98

07-22-98

08-20-98

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

Time 

(24-hour)

1445

1545

1315

1035

1055

1430

1515

1415

1415

1245

1125

1130a

1030

1500

1505a

1300

1320

1500

1300

1310

1315a

1515

1520a

0900

1430

1435a

Magnesium 

(00925) 

(mg/L as Mg)

18

17

--

-

-

18

19

16

17

-

-

~

-

24

23

24

20

26

27

25

25

19

19

30

26

26

Manganese 

(01056) 

(lig/L as Mn)

2,000

205

-

-

-

780

1,410

1,000

1,020

-

-

-

-

910

900

930

750

1,100

1,070

931

943

1,100

1,130

1,240

1,080

1,080

Potassium 

(00935) 

(mg/L as K)

4.6

3.0

--

-

~

3.3

4.8

3.5

3.2

-

-

-

-

2.4

2.5

2.9

2.9

2.9

3.0

2.6

2:6

3.2

3.1

3.5

2.7

2.8

Silica 

(00955) 

(mg/L as SiO2)

20

8.6

~

-

-

23

9.6

18

8.6

-

-

«

-

14

14

13

12

14

16

16

16

16

16

16

15

15
CO 

10

V) m

Table 5. Dissolved common-ion and trace-element concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999-Continued

m

m

O

X

o

33

OrO

O

0

o

 n

33 

O

Site name (with map

ID from table 1)

J-Avenue Waterworks Plant (30)--Continued

"Field-replicate sample.

''Field-blank sample

Date

(month,

day, year)

08-19-98

11-16-98

03-03-99

Time

(24-hour)

1420

1430b

1100

1130

Magnesium

(00925)

(mg/L as Mg)

22

<0.004

24

24

Manganese

(01056)

(ng/L as Mn)

703

<4.0

917

996

Potassium

(00935)

(mg/L as K)

2.9

<0.10

3.4

2.7

Silica

(00955)

(mg/L as SiO2)

16

<0.10

17

15

_^ cEstimated concentration less than the minimum reporting limit.

X

m

o

m

§j*

33

33

 o

6
Table 6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999

[Constituents listed with USGS parameter codes in parantheses; mg/L, milligrams per liter; , sample not analyzed for constituent; <, less than]

CD

m

(0

u 

u

Site name 

(with mapID from 

Table 1)

Cedar River at Edgewood Road (31)

1993USGSCRM-K1)

Date 

(month, 

day, year)

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

Time 

(24-hour)

1415

1200

1220

1400

0915

0945

1400

1115

1400

1200

1205a

1215

1330

1125

1130a

0900

1200b

1040

1000

1100

1140

1330

1335a

1130

1130

Nitrogen, 

nitrite 

(00613) 

(mg/L as N)

-

-

0.03

0.01

0.02

0.09

0.03

0.04

0.03

~

-

-

0.03

-

-

0.01

0.02

0.03

<0.01

-

<0.01

<0.01

<0.01

<0.01

<0.01

Nitrogen, 

nitrite plus 

nitrate 

(00631) 

(mg/L as N)

~

-

0.12

7.8

6.8

11.0

1.5

6.6

10.8

-

-

~

3.3

-

-

0.05

<0.05

7.2

<0.05

~

<0.05

<0.05

<0.05

<0.05

<0.05

Nitrogen, 

ammonia 

(00608) 

(mg/L as N)

-

-

0.22

0.22

<0.015

0.06

0.04

<0.02

0.04

-

-

-

0.08

~

-

0.95

<0.02

<0.02

7.6

--

7.4

8.5

8.4

4.6

4.4

Orthop

(00

(mg/L 

-

-

0

0

0

0

<0

0

0

-

-

-

0

-

-

0

<0

0

0

--

0

<0

<0

0

0
CO

m

Table 6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999~Continued

m

m 

O Site name

^ (with mapID from 

g Table 1)

P 1993USGS CRM-1 (D-Continued

O

O

o

a

g-n

g2

m 

o

m

§ 1993USGS CRM-2 (2)

3J

TJ

O

(0

3)

>

1993USGS CRM-3 (3)

1993USGS CRM-4 (4)

Date 

(month, 

day, year)

08-20-97

11-06-97

03-25-98

08-19-98

11-16-98

03-03-99

08-26-96

12-11-96

05-30-97

08-20-97

11-06-97

03-25-98

08-19-98

11-17-98

03-03-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

Time 

(24-hour)

1230

1030

1315

1250

0800

0830b

1020

1500

0840

1015

1020b

1015

1330

1050

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

Nitrogen, 

nitrite 

(00613) 

(mg/L as N)

0.03

<0.01

<0.01

<0.01

<0.01

0.01

<0.01

<0.01

<0.01

<0.01

<0.01

0.02

0.01

<0.01

0.01

0.02

0.05

0.01

-

-

<0.01

<0.01

<0.01

Nitrogen, 

nitrite plus 

nitrate 

(00631) 

(mg/L as N)

0.07

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.05

0.06

<0.05

0.09

0.05

<0.05

9.1

5.8

1.8

0.78

~

-

<0.05

2.3

<0.05

Nitrogen, 

ammonia 

(00608) 

(mg/L as N)

4.4

9.8

9.4

8.5

0.03

6.2

0.09

3.6

4.2

<0.015

3.2

<0.02

2.7

1.8

0.03

0.16

-

0.03

0.92

-

~

0.02

0.04

0.02

Orthop

(00

(mg/L 

0

0

0

<0

<0

0

<0

0

0

<0

0

0

0

0

0

0

0

0

~

-

0

0

0
Table 6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999--Continued

00

m 

u>

Site name 

(with mapID from 

Table 1)

1993USGS CRM-4 (4)-Continued

1993USGS CRM-6 (5)

1994USGS CRM-7 (6)

1994USGS CRM-9 (7)

1994USGS CRM-10 (8)

1993USGSCRM-11(9)

1993USGS CRM-12 (10)

Date 

(month, 

day, year)

06-25-97

08-20-97

11-06-97

03-25-98

08-19-98

11-17-98

03-02-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

04-23-96

06-17-96

08-20-97

04-23-96

06-17-96

Time 

(24-hour)

0900

0830

1240

1200

1130

1000

1300

0930

0930

1200

1200

1200

0930

1300

1230

1235

1000

1345

1330

1130

1400

1100

0900

1030

Nitrogen, 

nitrite 

(00613) 

(mg/L as N)

<0.01

0.11

0.03

<0.01

0.19

0.16

0.10

<0.01

<0.01

-

<0.01

<0.01

-

<0.01

-

<0.01

~

<0.01

<0.01

-

Nitrogen, 

nitrite plus 

nitrate 

(00631) 

(mg/L as N)

1.3

5.0

0.08

0.06

2.0

4.0

7.4

-

<0.05

<0.05

-

-

0.08

<0.05

-

<0.05

-

0.08

-

0.08

<0.05

-

Nitrogen, 

ammonia 

(00608) 

(mg/L as N)

0.02

0.04

<0.02

0.04

0.08

0.02

<0.02

-

0.32

0.33

-

2.6

0.98

--

1.1

-

0.03

--

0.05

0.07

-

Orthop

(00

(mg/

0

0

0

0

0

0

0

<0

<0

-

0

0

-

0

0

-

0

<0

-

-
(0

m

Table 6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999--Continued

ECTED HYDR

O

S

o 

o

0

 n

§

S

H

X

m

o

m

0

3J

3J

 o

O

(0

3)m

Site name Date 

(with mapID from (month, 

Table 1) day, year)

1993USGS CRM-12 (10)~Continued 08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

1996USGS CRM-14 (1 1) 05-29-97

1996USGS CRM-15 (12) 09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

1996USGSCRM-16(13) 09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

1996USGSCRM-17(14) 09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

1 996USGS CRM- 18(15) 09-24-96

05-29-97

Time 

(24-hour)

1030

1035a

1230

1215

1215

1315

0900

0930

1000

1310

1450

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

Nitrogen, 

nitrite 

(00613) 

(mg/L as N)

<0.01

<0.01

<0.01

<0.01

<0.01

<0.01

<0.01

0.01

<0.01

~

-

0.02

<0.01

~

-

-

0.02

0.02

-

~

-

0.02

<0.01

Nitrogen, 

nitrite plus 

nitrate 

(00631) 

(mg/L as N)

<0.05

<0.05

<0.05

<0.05

<0.05

0.06

0.54

0.58

0.74

-

-

0.06

<0.05

-

-

~

0.06

3.1

-

-

-

0.07

<0.05

Nitrogen, 

ammonia 

(00608) 

(mg/L as N)

3.6

3.7

4.3

3.7

3.6

3.0

<0.015

<0.015

<0.015

_

-

~

0.49

0.27

~

~

-

0.67

<0.015

--

-

-

0.14

0.59

Orthop

(00

(mg/L 

<0

<0

<0

<0

<0

0

0

0

0

-

-

0

0

~

-

~

0

0

-

-

-

0

0
Table 6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids, Iowa, munici

April 1996 through March 1999--Continued

Site name 

(with mapID from 

Table 1)

1996USGS CRM-18 (15)-Continued

1996USGS CRM-19 (16)

1997USGSCRM-20(17)

1998USGSCRM-21(18)

1998USGS CRM-22 (19)

1998USGS CRM-23 (20)

1998USGS CRM-24 (21)

1998USGS CRM-25 (22)

1998USGSCRM-26(23)

03

m

CO

Date 

(month, 

day, year)

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

11-06-98

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

Time 

(24-hour)

1015

1400

0900

1300

1400

1120

1305

1100

1500b

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

Nitrogen, 

nitrite 

(00613) 

(mg/L as N)

-

-

-

0.01

0.08

-

-

-

0.03

0.03

0.02

0.01

<0.01

<0.01

0.08

0.01

0.03

0.02

<0.01

0.02

<0.01

0.01

Nitrogen, 

nitrite plus 

nitrate 

(00631) 

(mg/L as N)

-

-

-

0.06

5.8

-

-

-

0.07

5.6

9.5

6.2

0.33

10.2

1.2

<0.05

1.2

6.7

3.9

5.4

<0.05

<0.05

Nitrogen, 

ammonia 

(00608) 

(mg/L as N)

-

-

-

0.83

<0.015

~

-

~

<0.02

<0.02

0.02

0.02

<0.02

<0.02

0.03

<0.02

0.03

<0.02

0.02

<0.02

0.03

<0.02

Orthop

(0

(mg/

-

-

~

0

<0

-

-

-

0

0

<0

0

0

0

0

0

0

<0

0

0

0

<0
w 

m

Table 6. Dissolved nutrient and organic-carbon concentrations in water samples collected from the Cedar Rapids, Iowa, municip

April 1996 through March 1999-Continued

ECTED HYDR

OrO

O

O

§g n

3D 

O

5

H

X

m 

o

m

3D

3D

TJ

o

w

3D

52

Site name 

(with mapID from 

Table 1)

1998USGS CRM-27 (24)

1996USGS CRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J-Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

11-16-98

03-02-99

05-29-97

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

09-24-96

05-29-97

06-03-98

07-22-98

07-22-99

08-20-98

04-22-96

06-17-96

08-26-96

Time 

(24-hour)

1315

0945

1630

1610

1345

1100

1110

1445

1545

1315

1035

1055

1430

1515

1415

1415

1245

1125

1130a

1030

1500

1505a

1300

1320

Nitrogen, 

nitrite 

(00613) 

(mg/L as N)

<0.01

0.02

0.01

0.16

._

-

-

0.02

0.06

-

-

-

0.02

<0.01

0.01

<0.01

-

-

-

-

-

-

<0.01

0.05

Nitrogen, 

nitrite plus 

nitrate 

(00631) 

(mg/L as N)

<0.05

<0.05

5.5

1.7

..

-

-

0.10

2.4

~

-

-

0.07

0.64

0.06

0.10

-

-

-

-

-

--

0.72

1.6

Nitrogen, 

ammonia 

(00608) 

(mg/L as N)

0.21

0.19

<0.015

0.07

..

-

-

0.50

<0.015

-

-

~

1.5

0.54

1.0

0.54

-

-

-

-

-

-

1.1

0.03

Orthop

(00

(mg/

0

0

0

<0

_

-

-

0

<0

-

-

-

0

0

0

0

-

-

-

-

-

-

0

0
o c ~0

"c o oo 8

o> ;= (§ d

*- « S pS» O o S *

« _

 C Q. °. ;« §5 s

Q- oS»§ rt>

s ~

c « ~ * 

o> c co «

O) O O «

2 E Sd

« E 2, » 

Z a E

.

ifsfs *% W k. CD S « .« Q d

 l|=t|

c" 

o>~ TZ « 

o js JS j

i_ O e

.* c s e>

z £

I ^

}Z ^

Q) ^ fl)

« § >r

Q £ 5K

*~" "O

E

« 2 Q) ** 

E oP

w "5. o>

Q) p ^

55 £ H

1.

OOONF- r* ri CS VO VO

fSfS-H'-H CSfS fS|^H^H

oooo oo ooo

^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^

V V V

r-o>o>n \ooo 0*0*0

*o co oo oo ON co ^o co ONCO^OIO ON « i csr~-oo

OOOO O -H OOO

oooo oo ooo

f^ f^ C^t f~5 C^t C^t C^t C^t C^t

O O O *O *o O O O *O

*O CO CO CO *O *o O^ ^ ^

ON ON ON ON ON ON 

III 1 II 

> i O *O O vo *O «-i en cs <s o cs

cs *o vo oo « i m

^H O O O -HO

1

_c

o

u

s

S^^X

i

ysp

1o

u

1

1

4

o ON en o r-

 i O <N -H

CS «-H ^H fO

OOOO

oooo

r-

-H o oo r-

 -< «o m oo ^00*0*0

oooo

t«H r-H r-H f^

OOOO

^^ ^^ ^^ ^^

o "o o o 

cs en o en

rf rf « i « i

OO OO ON ON ON ON 

ON vo en

oo ri en

O "HO

u"B.

1 "^

1

ii "i

2 3

13 13

E E eg ^

TABLES 39
£

m

m 

o

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999

[All concentrations in micrograms per liter; constituents listed with USGS parameter codes in parantheses; --, sample not analyzed for constituent; <, less than]

FED HYDROL

0 

O

o

I n

|

m

CEDAR

RAPIDS

3J

>

Date 

(month, 

Site name (with map ID from table 1 ) day, year)

Cedar River at Edgewood Road (3 1 ) 04-22-96

06-17-96

08-26-96 

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97 

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

1993USGS CRM-1 (1) 04-23-96

06-17-96

08-26-96

12-11-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

Time 

(24-hour)

1415

1200

1220 

1400

0915

0945

1400

1115 

1400

1200 

1205b

1215

1330

1125

1130b

0900

1200C

1040

1000

1100

1140

1330

1335b

1130

1130

1230

1030

Acetochlor 

(49260)

~

-

<0.05 

<0.05

0.18

1.17

0.03a

<0.05 

<0.05

0.16 

0.15

<0.05

0.03a

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Alachlor 

(46342)

<0.05

<0.05

<0.05 

<0.05

0.04a

0.16

<0.05

<0.05 

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Ametryn 

(38401)

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Atrazine 

(39632)

0.06

0.75

0.10 

0.07

0.16

8.16

0.14

0.08 

0.05

1.10 

1.06

0.23

0.15

0.14

0.17

0.07

<0.05

<0.05

<0.05

0.06

0.06

0.05

0.05

0.04a

0.05a

0.12

0.17

Butachl

(04026

-

-

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05 

<0.05

-

<0.05

~

-

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and 

March 1999-Continued

_ 1

FABLES 4

Date 

(month, 

Site name (with map ID from table 1 ) day, year)

1993USGSCRM-1 (1)~ Continued 03-25-98

08-19-98

11-16-98

03-03-99

1993USGS CRM-2 (2) 08-26-96

12-11-96

05-30-97

08-20-97

11-06-97

03-25-98

08-19-98

11-17-98

03-03-99

1993USGS CRM-3 (3) 04-22-96

06-18-96

08-27-96

1993USGS CRM-4 (4) 04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97 

03-25-98

Time 

(24-hour)

1315

1250

0800

0830C

1020

1500

0840

1015

1020C

1015

1330

1050

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

0900

0830

1240 

1200

Acetochlor 

(49260)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

~

~

<0.05

<0.05

<0.05

0.03a

<0.05

<0.05 

<0.05

Alachlor 

(46342)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05 

<0.05

Ametryn 

(38401)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05 

<0.05

Atrazine 

(39632)

0.04a

0.04a

0.03a

<0.05

0.05

<0.05

0.13

0.15

<0.05

0.30

0.42

0.10

0.13

0.12

0.06

0.05

0.08

0.09

0.06

1.40

0.13

0.06

0.07

0.33

0.32

0.08 

0.05

Butach

(04026

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.03

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05 

<0.05
to 

m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

.ECTED HYDROI

*

O

g

 A FROM

THE CEDAR

3)

2

>

m

Date 

(month, 

Site name (with map ID from table 1 ) day, year)

1 993USGS CRM-4 (4)-Continued 08- 1 9-98 

11-17-98

03-02-99

1993USGS CRM-6 (5) 04-22-96

06-18-96 

08-27-96

1994USGS CRM-7 (6) 04-22-96 

06-18-96 

08-27-96

1994USGS CRM-9 (7) 04-22-96

06-18-96

08-27-96

1994USGS CRM-10 (8) 04-22-96

06-18-96

1 993USGS CRM- 1 1 (9) 04-23-96

06-17-96

08-20-97

1993USGS CRM-12 (10) 04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

Time 

(24-hour)

1130 

1000

1300

0930

0930 

1200

1200 

1200 

0930

1300

1230

1235

1000

1345

1330

1130

1400

1100

0900

1030

1030

1035b

1230

1215

Acetochlor 

(49260)

<0.05 

<0.05

<0.05

-

<0.05

<0.05

~

--

-

<0.05

-

-

-

-

<0.05

-

~

<0.05

<0.05

<0.05

<0.05

Alachlor 

(46342)

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05 

<0.05

<0.05

<0.05

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Ametryn 

(38401)

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05 

<0.05

<0.05

<0.05

~

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Atrazine 

(39632)

0.26 

0.10

0.06

<0.05

<0.05 

<0.05

0.08 

0.09

<0.05

<0.05

-

<0.05

0.12

0.30

<0.05

<0.05

<0.05

<0.05

0.05

0.05

0.06

0.05

0.06

Butachl

(04026

<0.05 

<0.05

<0.05

-

<0.05

<0.05

-

~

-

<0.05

-

~

~

-

<0.05

~

-

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

Site name (with map ID from table 1)

1993USGS CRM-12 (lO)--Continued

1996USGSCRM-14(11)

1996USGSCRM-15(12)

1996USGSCRM-16(13)

1996USGSCRM-17(14)

1996USGSCRM-18(15)

1996USGSCRM-19(16)

Date 

(month, 

day, year)

06-25-97

08-20-97

05-29-97

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

Time 

(24-hour)

1215

1315

0900

0930

1000

1310

1450

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

1015

1400

0900

1300

1400

Acetochlor 

(49260)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0,017a

0.037a

<0.05

, <0.05

<0.05

<0.05

0.06

<0.05

<0.05

<0.05

0.05a

<0.05

<0.05

<0.05

<0.05

<0.05

0.10

Alachlor 

(46342)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Ametryn 

(38401)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Atrazine 

(39632)

0.05a

0.06

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.10

0.12

0.05

0.08

0.07

0.28

0.62

0.51

0.54

0.59

0.50

0.10

0.06

0.09

0.12

0.11

0.33

Butachl

(04026

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

--

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

.ECTED t

^-

a

30

o

5

0

o

1 n

3

s

H 

X

m

o

m

5

30

30

 o

§

5

m

Site name (with map ID from table 1)

1996USGS CRM-19 (16)-Continued

1997USGSCRM-20(17)

1998USGS CRM-21 (18)

1998USGS CRM-22 (19)

1998USGS CRM-23 (20)

1998USGSCRM-24(21)

1998USGS CRM-25 (22)

1998USGSCRM-26(23)

1998USGSCRM-27(24)

1996USGS CRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

Date 

(month, 

day, year)

06-03-98

07-22-98

08-20-98

11-06-97

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

05-29-97

05-29-97

06-03-98

Time 

(24-hour)

1120

1305

1100

1500C

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

1315

0945

1630

1610

1345

Acetochlor 

(49260)

<0.05

0.09

<0.05

<0.05

<0.05

0.01 a

0.03a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.06

0.06

0.17

Alachlor 

(46342)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Ametryn 

(38401)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.02a

<0.05

<0.05

<0.05

<0.05

Atrazine 

(39632)

0.22

1.39

<0.05

<0.05

0.09

0.07

0.08

0.07

0.08

0.12

0.15

0.08

0.04a

0.09

0.12

0.14

0.05

0.19

0.22

0.30

0.33

2.71

Butachl

(04026

-

~

<0.05

<0.05

<0.05

<0.05

<0.05

0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

Site name (with map ID from table 1)

1996USGS CRM-SD-61 (26)~Continued

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J-Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

Time 

(24-hour)

1100

1110

1445

1545

1315

1035

1055

1430

1515

1415

1415

1245

1125

1130b

1030

1500

1505b

1300

1320

1500

1300

1310

1315b

1515

1520b

0900

Acetochlor 

(49260)

<0.05

<0.05

<0.05

0.13

<0.05

<0.05

<0.05

<0.05

0.06

<0.05

0.09

0.07

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

0.03a

0.03a

<0.05

<0.05

<0.05

Alachlor 

(46342)

<0.05

<0.05

<0.05

0.03a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Ametryn 

(38401)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Atrazine 

(39632)

0.71

0.29

0.05

0.44

0.95

1.01

0.72

<0.05

0.15

0.05

0.32

0.87

0.48

0.47

0.38

<0.05

<0.05

0.15

0.29

0.11

0.06

0.12

0.12

0.40

0.37

0.12

Butachlo

(04026)

-

-

<0.05

<0.05

-

-

-

<0.05

<0.05

<0.05

<0.05

-

-

-

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999--Continued

m 

o

m

D

3C

o

3D 

O

O 

O

O

g

 n 

3D

O

H

m

o

m

g

3D

3D

 D

D 

V)

Site name (with map ID from table 1)

J- Avenue Waterworks Plant (30) Continued

Date

(month,

day, year)

03-25-98

08-19-98

11-16-98

03-03-99

Time

(24-hour)

1430

1435b

1420

1430b

1100

1130

Acetochlor

(49260)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Alachlor

(46342)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Ametryn

(38401)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Atrazine

(39632)

0.06

0.05

0.28

<0.05

0.15

0.06

Butachlo

(04026)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

3D

m
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

Date 

(month, 

Site name (with map ID from table 1) day, year)

Cedar River at Edgewood Road (3 1 ) 04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

1993USGSCRM-1 (1) 04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

Time 

(24-hour)

1415

1200

1220

1400

0915

0945

1400

1115

1400

1200

1205b

1215

1330

1125

1130b

0900

1200C

1040

1000

1100

1140

1330

1335b

1130

1130

1230

1030

1315

Carboxin 

(04027))

~

~

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

~

-

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

CyanazineCyanazine amide 

(04041) (50010)

<0.20

<0.20

<0.20

<0.20

0.09a

0.74

<0.20

<0.20

<0.20

<0.05 <0.05

<0.05 <0.05

<0.05 <0.05

<0.20

<0.05 <0.05

<0.05 <0.05

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.06a

<0.20

Deethyl- Deisopropy

atrazine atrazine 

(04040) (04038)

<0.05

0.16

0.08

0.09

0.16

0.64

0.12

0.13

0.13

0.21

0.20

0.15

0.16

0.13

0.17

0.13

<0.05

0.12

<0.05

<0.05

0.05

<0.05

<0.05

0.05 a

0.04a

0.10

0.10

0.07

<0.05

<0.05

<0.05

<0.05

0.09

0.14

<0.05

0.06

0.04a

0.12

0.11

<0.05

0.07

0.05

0.07

0.28

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.03 a

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999--Continued

m

ECTED HYDROl

O 

O

O 

O

TA FROM

H

IE CEDAR R>

r

2

w

30m

Date 

(month, 

Site name (with map ID from table 1 ) day, year)

1993USGS CRM-1 (l)-Continued 08-19-98 

11-16-98

03-03-99

1 993USGS CRM-2 (2) 08-26-96 

12-11-96

05-30-97

08-20-97 

11-06-97

03-25-98

08-19-98

11-17-98

03-03-99

1993USGS CRM-3 (3) 04-22-96

06-18-96

08-27-96

1 993USGS CRM-4 (4) 04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

08-19-98

Time 

(24-hour)

1250 

0800

0830C

1020

1500 

0840

1015

1020C 

1015 

1330

1050

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

0900

0830

1240

1200

1130

Carboxin 

(04027))

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05

0.06 

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

CyanazineCyanazine amide 

(04041) (50010)

<0.20 

<0.20

<0.20

<0.20

<0.20 

<0.20

0.08a

<0.20 

0.07a 

0.06a

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.50

<0.20

<0.20

<0.20

0.09a

0.07a

<0.20

<0.20

<0.20

Deethylatrazine 

(04040)

0.05a 

0.03a

<0.05

0.04a

<0.05 

0.06

0.08

<0.05 

0.11 

0.16

0.07

0.14

0.14

0.11

<0.05

<0.05

0.07

<0.05

0.21

0.08

0.06

0.07

0.10

0.21

0.06

0.05a

0.14

Deisopropy

atrazine 

(04038)

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05 

<0.05 

0.07

<0.05

0.06

0.22

<0.05

<0.05

<0.05

<0.05

<0.05

0.06

<0.05

<0.05

0.05 a

<0.05

<0.05

<0.05

<0.05

0.06
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

Site name (with map ID from table 1)

1993USGS CRM-4 (4)--Continued

1993USGS CRM-6 (5)

1994USGS CRM-7 (6)

1994USGS CRM-9 (7)

1994USGSCRM-10(8)

1993USGSCRM-1K9)

1993USGSCRM-12(10)

Date 

(month, 

day, year)

11-17-98

03-02-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

04-23-96

06-17-96

08-20-97

04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

Time 

(24-hour)

1000

1300

0930

0930

1200

1200

1200

0930

1300

1230

1235

1000

1345

1330

1130

1400

1100

0900

1030

1030

1035b

1230

1215

1215

1315

Carboxin 

(04027))

<0.05

<0.05

~

-

<0.05

-

<0.05

-

~

~

<0.05

-

-

-

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

CyanazineCyanazine amide 

(04041) (50010)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

--

<0.20

<0.20

<0.20

-.

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

Deethylatrazine 

(04040)

0.14

0.10

<0.05

<0.05

<0.05

<0.05

-

<0.05

<0.05

<0.05

~

<0.05

<0.05

0.06

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.05a

0.04a

0.05a

Deisopropyl

atrazine 

(04038)

0.17

<0.05

<0.05

<0.05

<0.05

<0.05

-

<0.05

<0.05

<0.05

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

.ECTED HYDROLOGIC

g

'A FROM 1

^^

m

o 

m

0

3)

TJ

o

V)

3)

Site name (with map ID from table 1)

1996USGSCRM-14(11) 

1996USGSCRM-15(12)

1996USGSCRM-16(13)

1996USGS CRM-17 (14)

1996USGSCRM-18(15)

1996USGSCRM-19(16)

Date 

(month, 

day, year)

05-29-97

09-24-96 

05-29-97

06-02-98

07-22-98 

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

0900

0930 

1000

1310

1450 

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

1015

1400

0900

1300

1400

1120

1305

1100

Carboxin 

(04027))

<0.05

<0.05 

<0.05

~

-

<0.05

<0.05

-

-

<0.05

<0.05

-

-

-

<0.05

<0.05

-

~

~

<0.05

<0.05

~

~

-

Cyanazine 

(04041)

<0.20

<0.20 

<0.20

<0.05

<0.05 

<0.05

<0.20

<0.20

<0.05

<0.05

<0.05

<0.20

0.1 5a

0.05

<0.05

<0.05

<0.20

<0.20

<0.05

<0.05

<0.05

<0.20

0.1 2a

<0.05

0.07

<0.05

Cyanazineamide 

(50010)

-

<0.05

<0.05 

<0.05

~

<0.05

<0.05

<0.05

-

0.08

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

~

<0.05

0.30

<0.05

Deethylatrazine 

(04040)

0.03a

<0.05 

<0.05

<0.05

<0.05 

<0.05

<0.05

0.10

0.07

0.16

0.13

0.06

0.23

0.18

0.18

0.17

0.14

0.08

0.08

<0.05

0.14

0.09

0.12

0.14

<0.05

0.22

Deisopropyl

atrazine 

(04038)

<0.05

<0.05 

<0.05

<0.05

<0.05 

<0.05

<0.05

0.04a

<0.05

<0.05

<0.05

<0.05

0.11

0.07

0.06

<0.05

0.05

<0.05

0.05

0.05

0.06

<0.05

0.05a

0.08

0.12

0.11
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

Site name (with map ID from table 1)

1997USGSCRM-20(17)

1998USGSCRM-2K18)

1998USGS CRM-22 (19)

1998USGS CRM-23 (20)

1998USGSCRM-24(21)

1998USGS CRM-25 (22)

1998USGS CRM-26 (23)

1998USGS CRM-27 (24)

1996USGS CRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

Date 

(month, 

day, year)

11-06-98

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

05-29-97

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1500C

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

1315

0945

1630

1610

1345

1100

1110

Carboxin 

(04027))

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

~

CyanazineCyanazine amide 

(04041) (50010)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.08a

0.1 Oa

0.16 0.31

<0.05 <0.05

<0.05 <0.05

Deethylatrazine 

(04040)

<0.05

0.16

0.11

0.09

0.10

0.12

0.07

0.11

0.08

0.09

0.26

0.50

0.07

0.06

0.07

0.09

0.16

0.17

0.44

0.20

0.13

Deisopropyl

atrazine 

(04038)

<0.05

0.06

0.03 a

0.03a

0.14

<0.05

0.07

<0.05

0.04a

<0.05

0.04a

<0.05

0.10

<0.05

0.12

<0.05

0.06

0.06

0.26

0.06

0.05

01

m 

tn

en
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

m 

o

m 

o

DC

o

8

5

O

O

§g n

3)

O

H

m

Om

D

3)

2

CD

C/5

3)m

>

Site name (with map ID from table 1 )

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J- Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

08-20-97

11-06-97

03-25-98

08-19-98

Time 

(24-hour)

1445

1545

1315

1035

1055

1430

1515

1415

1415

1245

1125

1130b

1030

1500

1505b

1300

1320

1500

1300

1310

1315b

1515

1520

0900

1430

1435b

1420

Carboxin 

(04027))

<0.05

<0.05

-

_

-

<0.05

<0.05

<0.05

<0.05

_

-

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Cyanazine 

(04041)

<0.20

0.1 2a

0.09

<0.05

<0.05

<0.20

0.06a

<0.20

0.08a

<0.05

<0.05

<0.05

<0.05

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.04a

0.04a

0.07a

0.08a

<0.20

<0.20

<0.20

<0.20

Cyanazineamide 

(50010)

~

-

0.23

<0.05

<0.05

~

-

~

~

0.19

<0.05

<0.05

<0.05

-

-

-

--

-

-

-

~

~

-

-

-

Deethylatrazine 

(04040)

<0.05

0.14

0.22

0.24

0.17

<0.05

0.10

<0.05

0.15

0.21

0.14

0.15

0.08

<0.05

<0.05

0.05

0.10

0.07

0.05

0.06

0.06

0.15

0.14

0.07

0.05

0.05a

0.13

Deisopropyl

atrazine 

(04038)

<0.05

0.06

0.12

0.09

0.06

<0.05

0.04a

<0.05

0.06

0.10

0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.04a

0.04a

0.03a

<0.05

<0.05

0.04a
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

Date Cyanazine- Deethyl- Deisopropy

(month, Time Carboxin Cyanazine amide atrazine atrazine 

Site name (with map ID from table 1) day, year) (24-hour) (04027)) (04041) (50010) (04040) (04038) 

J-Avenue Waterworks Plant (30)--Continued 08-19-98 1430C <0.05 <0.20 ~ <0.05 <0.05 

11-16-98 1100 <0.05 <0.20 -- 0.09 0.11 

03-03-99 1130 <0.05 <0.20 - 0.08 <0.05 
(0

m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

ECTED h

D

3D 

O

5

o

o 

a

:H

 n

3

2

H

X

m

o

m

p

3D

3D

TJ

D

(0

3D

m

Date 

(month, 

Site name (with map ID from table 1) day, year)

Cedar River at Edgewood Road (3 1 ) 04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

1993USGS CRM-1 (1) 04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

Time 

(24-hour)

1415

1200

1220

1400

0915

0945

1400

1115

1400

1200

1205b

1215

1330

1125

1130b

0900

1200C

1040

1000

1100

1140

1330

1335b

1130

1130

1230

1030

1315

Metolachlor 

(39415)

0.18

0.30

0.06

0.07

0.24

2.45

0.08

0.07

0.10

0.17

0.16

0.05

0.07

<0.05

<0.05

0.11

<0.05

0.41

0.09

0.11

0.07

<0.05

<0.05

0.07

0.07

0.22

0.14

O.Ola

Metribuzin 

(82630)

<0.05

<0.05

<0.05

<0.05

<0.05

0.07

0.06

0.05a

<0.05

<0.05

<0.05

<0.05

0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.05

<0.05

Prometon 

(04037)

<0.05

<0.05

0.06

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometry 

(04036)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Propach

(04024

-

_

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

CD

m 

<n 

tn 

01

Date 

(month, 

Site name (with map ID from table 1) day, year)

1 993USGS CRM- 1 ( 1 )~Continued 08- 1 9-98

11-16-98

11-16-98

03-03-99

1993USGS CRM-2 (2) 08-26-96

12-11-96

05-30-97

08-20-97

11-06-97

03-25-98

08-19-98

11-17-98

03-03-99

1993USGS CRM-3 (3) 04-22-96

06-18-96

08-27-96

1993USGS CRM-4 (4) 04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

08-19-98

Time 

(24-hour)

1250

0800

0830C

1020

1500

0840

1015

1020C

1015

1330

1050

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

0900

0830

1240

1200

1130

Metolachlor 

(39415)

0.05 a

0.02a

<0.05

0.02a

<0.05

0.07

0.08

0.04 a

0.10

0.12

0.02a

0.10

0.04a

0.04 a

<0.05

0.10

0.17

0.53

0.52

0.07

<0.05

0.05

0.31

0.20

0.06

0.02a

0.10

Metribuzin 

(82630)

0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.05

0.05 a

0.06

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.07

0.05 a

0.05

<0.05

Prometon 

(04037)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.05 a

<0.05

<0.05

0.03 a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.04 a

<0.05

<0.05

<0.05

Prometry 

(04036)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Propach

(04024

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

~

-

<0.05

-

~

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
0)

m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999--Continued

ECTED HYDROI

O 

O 

O

I n

3D 

O

2

H

m

CEDAR

RAPIDS AREA

Date 

(month, 

Site name (with map ID from table 1) day, year)

1993USGS CRM-4 (4) --Continued 1 1-17-98 

03-02-99

1993USGS CRM-6 (5) 04-22-96

06-18-96 

08-27-96

1 994USGS CRM-7 (6) 04-22-96 

06-18-96

08-27-96

1 994USGS CRM-9 (7) 04-22-96 

06-18-96

08-27-96

1 994USGS CRM- 1 0 (8) 04-22-96

06-18-96

1993USGS CRM-1 1 (9) 04-23-96

06-17-96

08-20-97

1993USGSCRM-12(10) 04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

Time 

(24-hour)

1000 

1300

0930

0930 

1200

1200 

1200

0930

1300 

1230 

1235 

1000

1345

1330

1130

1400

1100

0900

1030

1030

1035b

1230

1215

1215

1315

Metolachlor 

(39415)

0.05 

0.03 a

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.05 a

0.03 a

0.08

Metribuzin 

(82630)

<0.05 

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometon 

(04037)

<0.05 

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.03 a

0.06

Prometry 

(04036)

<0.05 

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Propach

(04024

<0.05 

<0.05

_

<0.05

_-

<0.05

<0.05

-

-

~

-

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

00

m

CO

en 

->l

Site name (with map ID from table 1 )

1996USGSCRM-14(11)

1996USGSCRM-15(12)

1996USGS CRM-16 (13)

1996USGSCRM-17(14)

1996USGS CRM-18 (15)

1996USGSCRM-19(16)

Date 

(month, 

day, year)

05-29-97

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

0900

0930

1000

1310

1450

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

1015

1400

0900

1300

1400

1120

1305

1100

Metolachlor 

(39415)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.18

0.58

<0.05

<0.05

<0.05

0.21

0.62

0.10

0.19

0.06

0.59

0.18

<0.05

0.18

0.13

0.06

0.51

0.11

0.23

0.15

Metribuzin 

(82630)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometon 

(04037)

<0.05

<0.05

0.04a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometry 

(04036)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Propach

(04024

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
(/>m 

m

3m 

a

x

o

3D 

O

5

o 

o

3

m

o 

m

3D 

3D

3D

m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, 

March 1999-Continued

Iowa, municipal well fields and C

Site name (with map ID from table 1 )

1997USGSCRM-20(17)

1998USGSCRM-21(18)

1998USGSCRM-22(19)

1998USGS CRM-23 (20)

1998USGSCRM-24(21)

1998USGSCRM-25(22)

1998USGS CRM-26 (23)

1998USGSCRM-27(24)

1996USGS CRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

Date 

(month, 

day, year)

11-06-98

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

05-29-97

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1500C

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

1315

0945

1630

1610

1345

1100

1110

Metolachlor 

(39415)

<0.05

0.08

0.60

0.45

0.03 a

0.20

0.03 a

0.02a

0.04a

0.03 a

<0.05

<0.05

0.05 a

0.02 a

0.03 a

0.02a

0.24

0.35

0.33

0.07

<0.05

Metribuzin 

(82630)

<0.05

0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometon 

(04037)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometry 

(04036)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Propach

(04024

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

CD

m

(0 

ui 

(O

Site name (with map ID from table 1)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J-Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

08-19-98

Time 

(24-hour)

1445

1545

1315

1035

1055

1430

1515

1415

1415

1245

1125

1130b

1030

1500

1505b

1300

1320

1500

1300

1310

1315b

1515

1520b

0900

1430

1435b

1420

Metolachlor 

(39415)

<0.05

0.42

0.11

0.16

0.08

<0.05

0.30

<0.05

0.36

0.14

0.08

0.08

0.08

0.08

0.08

0.17

0.18

0.07

0.12

0.15

0.14

0.16

0.15

0.07

0.03 a

0.04a

0.09

Metribuzin 

(82630)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Prometon 

(04037)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.04a

0.04a

<0.05

<0.05

<0.05

<0.05

Prometry 

(04036)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Propach

(0402

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

m

m

m

o

z 

o

3J 

O

5

o

o

§9

g

-n

H

m

o

m

§

S

3D

 o

O

Date

(month,

Site name (with map ID from table 1 ) day, year)

J- Avenue Waterworks Plant (30)-Continued 08- 1 9-98

11-16-98

03-03-99

Time Metolachlor Metribuzin Prometon Prometry Propach

(24-hour) (39415) (82630) (04037) (04036) (0402

1430C <0.05 <0.05 <0.05 <0.05 <0.05 

1100 0.04a <0.05 <0.05 ,0.05 <0.05 

1130 0.02a <0.05 <0.05 <0.05 <0.05 
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999--Continued

00

m

(/>

O)

Date 

(month, 

Site name (with map ID from table 1) day, year)

Cedar River at Edgewood Road (3 1 ) 04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

06-03-98

07-22-98

08-19-98

08-20-98

11-16-98

03-02-99

03-03-99

1993USGS CRM-1 (1) 04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

Time 

(24-hour)

1415

1200

1220

1400

0915

0945

1400

1115

1400

1200

1205b

1215

1330

1125

1130b

0900

1200C

1040

1000

1100

1140

1330

1335b

1130

1130

1230

1030

1315

Simetryn 

(04030)

-

~

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

~

-

<0.05

-

-

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Simazine 

(04035)

<0.05

<0.05

<0.05

<0.05

0.04a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.03a

0.03a

<0.05

<0.05

<0.05

Terbacil 

(04032)

-

~

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

~

-

-

<0.05

~

~

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Terbutryn 

(no code) 

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05 

-

-
(0m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

ECTED HYDROl

0 

O

O

g § n 

3) 

O

H

m

0

m

3) 

3)

 o

o

(0

31m

Date 

(month, 

Site name (with map ID from table 1 ) day, year)

1993USGS CRM-1 (l)-Continued 08-19-98 

11-16-98

03-03-99

1993USGS CRM-2 (2) 08-26-96 

12-11-96

05-30-97 

08-20-97

11-06-97

03-25-98

08-19-98

11-17-98

03-03-99

1993USGS CRM-3 (3) 04-22-96

06-18-96

08-27-96

1993USGS CRM-4 (4) 04-22-96

06-18-96

08-27-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

08-19-98

Time 

(24-hour)

1250 

0800

0830C

1020

1500 

0840

1015 

1020C 

1015

1330

1050

1530

0900

0915

1045

1030

1320

1000

1000

1240

1050

0830

0900

0830

1240

1200

1130

Simetryn 

(04030)

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05 

0.04a 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

<0.05

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Simazine 

(04035)

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

0.04a 

0.03a 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.03a

<0.05

<0.05

<0.05

0.03a

Terbacil 

(04032)

<0.05 

<0.05

<0.05

<0.05

<0.05 

<0.05

<0.05 

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

<0.05

~

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Terbutryn 

(no code) 

-
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

CO

m

CO

s

Site name (with map ID from table 1)

1993USGS CRM-4 (4)-Continued

1993USGS CRM-6 (5)

1994USGS CRM-7 (6)

1994USGS CRM-9 (7)

1994USGSCRM-10(8)

1993USGSCRM-11(9)

1993USGS CRM-12 (10)

Date 

(month, 

day, year)

11-17-98

03-02-99

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

08-27-96

04-22-96

06-18-96

04-23-96

06-17-96

08-20-97

04-23-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

Time 

(24-hour)

1000

1300

0930

0930

1200

1200

1200

0930

1300

1230

1235

1000

1345

1330

1130

1400

1100

0900

1030

1030

1035b

1230

1215

1215

1315

Simetryn 

(04030)

<0.05

<0.05

~

-

<0.05

-

-

<0.05

-

-

<0.05

-

-

~

-

<0.05

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Simazine 

(04035)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

<0.05

<0.05

<0.05

--

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Terbacil 

(04032)

<0.05

<0.05

-

-

<0.05

-

-

<0.05

-

-

<0.05

~

-

~

-

<0.05

~

-

<0i05

<0.05

<0.05

<0.05

<0.05

<0.05

Terbutryn 

(no code) 

-

-

..

-

-

..

..

-

-

-

-
2

m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999-Continued

ECTED h

.1- 

O

31

O

O

O 

O

§

 n

31

O

S

H

m

o

m

pg1

31

31

TJ

W

31

m

Site name (with map ID from table 1)

1996USGSCRM-14(11)

1996USGSCRM-15(12)

1996USGSCRM-16(13)

1996USGSCRM-17(14)

1996USGSCRM-18(15)

1996USGSCRM-19(16)

Date 

(month, 

day, year)

05-29-97

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-02-98

07-22-98

08-19-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

09-24-96

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

0900

0930

1000

1310

1450

0850

1030

1200

1115

1525

0955

1120

1115

1200

1600

1030

1400

1315

1015

1400

0900

1300

1400

1120

1305

1100

Simetryn 

(04030)

<0.05

<0.05

<0.05

-

<0.05

<0.05

~

_

~

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

Simazine 

(04035)

0.03 l a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.034a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.04a

<0.05

<0.05

<0.05

Terbacil 

(04032)

<0.05

<0.05

<0.05

~

<0.05

<0.05

-

_

-

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

-

<0.05

<0.05

-

-

.-

Terbutryn 

(no code)

-

-

-

<0.05

<0.05

<0.05

_

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05

-

-

<0.05

<0.05

<0.05
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, 

March 1999-Continued

municipal well fields and C

Site name (with map ID from table 1)

1997USGSCRM-20(17)

1998USGSCRM-21 (18)

1998USGSCRM-22(19)

1998USGS CRM-23 (20)

1998USGSCRM-24(21)

1998USGSCRM-25(22)

1998USGS CRM-26 (23)

1998USGS CRM-27 (24)

1996USGS CRM-SD-60 (25)

1996USGS CRM-SD-61 (26)

Date 

(month, 

day, year)

11-06-97

11-06-97

03-25-98

03-25-98

11-16-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

11-17-98

03-02-99

11-16-98

03-02-99

11-16-98

03-02-99

05-29-97

05-29-97

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1500C

1505

0945

0900

1450

1030

1530

1140

1415

1100

1100

0850

1215

1215

1315

0945

1630

1610

1345

1100

1110

Simetryn 

(04030)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

Simazine 

(04035)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.037a

<0.05

<0.05

<0.05

Terbacil 

(04032)

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

-

-

Terbutryn 

(no code) 

<0.05

<0.05

<0.05
O)

at

to m

Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and C

March 1999--Continued

.ECTED HYDROI

O 

O

1C DATA

FROM Th

m

CEDAR

3J

> 

TJ

0

to

>

3Jm

>

Site name (with map ID from table 1)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-63 (28)

1996USGS CRM-SD-64 (29)

J- Avenue Waterworks Plant (30)

Date 

(month, 

day, year)

09-24-96 

05-29-97

06-03-98

07-22-98 

08-20-98

09-24-96 

05-29-97

09-24-96 

05-29-97

06-03-98

07-22-98

08-20-98

04-22-96

06-17-96

08-26-96

12-11-96

05-30-97

06-25-97

08-20-97

11-06-97

03-25-98

08-19-98

Time 

(24-hour)

1445 

1545

1315

1035 

1055

1430 

1515

1415 

1415

1245

1125

1130b 

1030

1500

1505b

1300

1320

1500

1300

1310

1315b

1515

1520b

0900

1430

1435b

1420

Simetryn 

(04030)

<0.05 

<0.05

-

~~

<0.05 

<0.05

<0.05 

<0.05

-

-

-

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Simazine 

(04035)

<0.05 

0.037a

<0.05

<0.05 

<0.05

<0.05 

0.035a

<0.050 

0.039a

<0.05

<0.05

<0.05 

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

0.03a

0.03a

0.03a

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Terbacil 

(04032)

<0.05 

<0.05

-

~~

<0.05 

<0.05

<0.05 

<0.05

-

-

-

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

Terbutryn 

(no code)

<0.05

<0.05 

<0.05

-

-

<0.05

<0.05

<0.05 

<0.05

-

-

-

~

-

-

-

-

~

--

-
Table 7. Dissolved pesticide concentrations in water samples collected from the Cedar Rapids, Iowa, municipal well fields and 

March 1999-Continued

Site name (with map ID from table 1)

J- Avenue Waterworks Plant (30)--Continued

Date 

(month, 

day, year)

08-19-98

11-16-98

03-03-99

Time 

(24-hour)

1430C

1100

1130

Simetryn 

(04030)

<0.05

<0.05

<0.05

Simazine 

(04035)

<0.05

<0.05

<0.05

Terbacil 

(04032)

<0.05

<0.05

Terbutryn 

(no code)

-

-

-

aEstimated concentration less than minimum reporting limit 

bField-replicate sample 

cField-blank sample

03

m

(/>

o>
Table 8. Dissolved concentrations of ethanesulfonic-acid degradates of acetanilide herbicides and hydroxy-atrazine in water 

samples collected from the Seminole Well Field and Cedar River, Cedar Rapids, Iowa, June 1998 through August 1998

[All concentrations in micrograms per liter; constituents listed with USGS parameter codes in parantheses; ESA, ethanesulfonic acid]

Site name 

(with map ID from table 1)

Cedar River at Edgwood Road (31)

1996USGS CRM-15 (12)

1996USGSCRM-16(13)

1996USGS CRM-17 (14)

1996USGSCRM-18(15)

1996USGSCRM-19(16)

1996USGS CRM-SD-61 (26)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-64 (29)

Date 

(month, 

day, year)

06-03-98

07-22-98

08-20-98

06-02-98

07-22-98

08-19-98

06-02-98

07-22-98

08-19-98

06-02-98

07-22-98

08-19-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1200

1205a

1215

1125

1130a

1310

1450

0850

1115

1525

0955

1200

1600

1030

1015

1400

0900

1120

1305

1100

1345

1100

1110

1315

1100

1055

1245

1125

1130a

1030

Acetochlor 

ESA 

(61029)

1.47

1.50

1.08

0.90

1.05

<0.20

<0.20

<0.20

0.39

0.85

1.10

1.26

1.37

1.48

0.71

1.14

1.39

0.99

2.06

1.58

2.08

2.90

1.55

1.98

3.32

2.49

1.72

2.48

2.55

1.07

Alachlor 

ESA 

(50009)

1.38

1.37

1.96

2.13

2.28

<0.20

<0.20

<0.20

1.02

1.62

1.21

1.62

1.73

1.28

1.06

2.19

2.50

1.38

2.06

2.35

1.36

2.36

2.24

1.31

2.20

2.23

1.43

1.97

2.02

2.15

Metolachlor 

ESA 

(61043)

5.45

5.31

4.25

4.15

4.56

<0.20

0.38

0.37

2.27

3.92

3.81

4.83

4.51

4.14

3.09

5.64

6.49

4.24

6.36

5.48

5.48

6.84

5.85

5.16

6.51

6.47

5.27

5.64

5.80

4.75

Hydroxyatrazine 

(50355)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.21

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

aField-replicate sample 

68 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 9. Dissolved concentrations of oxanilic-acid degradates of acetanilide herbicides in water samples collected 

from the Seminole Well Field and Cedar River, Cedar Rapids, Iowa, June 1998 through August 1998

[All concentrations in micrograms per liter; constituents listed with USGS parameter codes in parantheses; OA.oxanilic acid]

Site name (with map 

ID from table 1)

Cedar River at Edgewood Road (31)

1996USGSCRM-15(12)

1996USGSCRM-16(13)

1996USGSCRM-17(14)

1996USGSCRM-18(15)

1996USGSCRM-19(16)

1996USGS CRM-SD-61 (26)

1996USGS CRM-SD-62 (27)

1996USGS CRM-SD-64 (29)

Date 

(month 

day, year)

06-03-98

07-22-98

08-20-98

06-02-98

07-22-98

08-19-98

06-02-98

07-22-98

08-19-98

06-02-98

07-22-98

08-19-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

06-03-98

07-22-98

08-20-98

Time 

(24-hour)

1200

1205a

1215

1125

1130a

1310

1450

0950

1115

1525

0955

1200

1600

1030

1015

1400

0900

1120

1305

1100

1345

1100

1110

1315

1035

1055

1245

1125

1130a

1030

Acetochlor 

OA 

(61030)

0.64

0.66

0.29

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.28

0.35

0.85

0.69

0.61

<0.20

<0.20

<0.20

0.66

1.17

0.20

1.66

1.08

0.26

1.18

1.75

0.67

1.04

1.34

1.41

<0.20

Alachlor 

OA 

(61031)

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.29

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

<0.20

0.20

<0.20

<0.20

0.31

0.29

<0.20

0.25

0.26

<0.20

Metolachlor 

OA 

(61044)

0.92

1.04

0.62

0.54

0.56

<0.20

<0.20

<0.20

0.45

0.76

0.82

1.22

1.25

0.87

0.77

0.89

0.81

0.78

1.17

0.69

1.16

1.43

0.88

1.19

1.7?.

1.04

1.20

1.40

1.46

0.59

aField-replicate sample

TABLES 69
Table 10a. Mean daily ground-water levels in observation well CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul Aug

1997

11.22

11.05

11.24

11.13

11.13

11.00

10.85

10.43

10.31

10.38

10.39

9.95

9.97

9.80

10.87

9.09

8.84

9.33

11.16

12.38

11.24

10.05

9.08

11.82 8.19

11.82 7.56

12.42 7.01

12.30 6.74

11.88 7.51

11.85 9.89

11.49 10.07

11.40 11.13

Sep

9.79

8.31

6.47

5.55

5.10

5.59

4.24

4.03

3.62

3.02

2.67

2.81

3.47

4.05

4.76

6.43

6.66

6.46

6.92

6.86

6.61

6.67

6.94

6.77

6.81

6.96

7.07

6.94

8.37

7.65

Oct

7.55

7.25

7.38

7.19

7.59

7.30

7.92

8.43

8.62

8.42

8.11

8.19

7.71

7.61

7.13

6.79

7.09

6.94

6.88

7.17

7.19

7.27

7.52

9.21

10.04

10.02

12.50

14.28

15.66

16.89

19.83

Nov

20.52

22.90

20.74

20.19

20.59

20.48

20.42

20.13

19.94

20.23

20.25

20.06

19.73

19.87

20.27

20.44

20.42

20.12

20.14

20.08

20.01

20.06

20.27

20.40

19.90

19.98

20.05

19.93

19.84

19.87

Dec

20.08

19.97

19.76

19.88

20.29

20.30

20.34

20.43

18.85

18.21

18.62

18.52

18.05

17.92

17.76

17.49

17.20

17.76

18.06

17.40

15.80

15.11

14.51

15.29

14.47

14.02

14.69

16.32

16.00

15.77

70 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10a. Mean daily ground-water levels in observation well CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-

14.53

14.85

14.71

15.03

15.54

17.23

17.58

17.89

18.25

19.42

19.76

20.26

20.36

20.32

20.39

20.42

20.31

20.31

20.27

20.38

19.78

19.67

19.59

19.75

--

24.27

24.34

24.53

24.51

24.72

Feb

24.94

25.40

26.13

25.11

24.80

25.77

25.30

24.61

24.30

24.26

24.26

23.85

23.76

23.72

23.45

23.66

25.32

23.92

23.89

23.81

23.59

23.62

23.74

23.51

23.00

24.21

23.04

19.71

~

--

_

Mar

18.98

18.44

18.31

18.63

17.62

17.87

17.80

17.13

17.18

16.81

17.79

19.05

20.01

18.93

18.05

19.33

20.19

20.45

20.64

20.85

21.07

21.62

22.60

22.91

21.39

19.72

20.40

19.06

16.52

17.66

20.21

Apr

17.10

13.19

8.44

4.86

2.51

1.01

3.00

2.52

1.80

1.92

0.34

0.13

1.74

4.33

6.97

5.40

2.02

1.26

0.44

2.37

3.10

5.48

6.52

4.85

2.62

3.63

8.41

8.09

11.08

12.70

May

13.44

13.26

11.73

11.89

12.82

11.52

11.28

11.72

10.54

9.44

9.56

11.74

11.47

11.29

11.59

10.90

10.15

9.39

9.16

9.94

10.22

10.52

10.47

10.08

9.56

9.15

10.67

11.74

12.12

12.91

13.26

Jun

1998

13.31

13.43

13.08

13.06

13.41

14.46

16.66

17.86

18.98

19.61

20.58

19.64

18.04

18.80

13.36

11.11

11.34

11.61

12.78

13.47

13.75

12.63

10.61

6.69

2.30

0.00

-0.01

-0.26

-0.37

0.09

Jul

0.24

0.10

-0.37

-0.51

0.51

1.88

2.62

3.12

5.46

6.60

5.90

5.59

4.81

3.47

3.38

3.55

3.44

3.48

3.19

1.98

1.46

0.88

0.72

0.92

1.02

0.88

0.79

1.03

1.01

1.26

2.80

Aug

2.57

2.20

1.58

1.55

1.60

0.81

0.28

0.65

0.66

0.48

0.93

1.39

1.83

2.55

2.93

1.92

1.90

2.55

2.18

3.63

3.32

2.51

2.66

3.43

4.27

4.20

5.03

5.60

5.89

6.34

6.84

Sep

7.08

7.06

6.73

6.71

6.91

7.24

6.80

7.37

7.16

7.54

7.60

7.89

7.97

7.29

6.62

5.97

5.35

4.78

4.22

4.04

3.63

3.83

3.82

3.62

3.80

3.66

3.97

3.99

5.76

7.82

_.

Oct

6.76

5.38

4.78

4.39

3.41

3.06

3.16

3.67

3.64

3.59

3.56

3.58

2.90

3.02

2.55

2.86

2.16

1.55

1.37

0.96

1.16

1.44

3.22

3.39

3.41

4.31

4.44

3.89

3.67

2.28

2.39

Nov

2.35

1.81

1.86

2.31

1.93

1.26

0.91

1.12

5.84

9.27

7.85

6.96

5.69

4.25

3.66

3.70

4.90

5.90

6.70

5.26

4.51

4.30

4.35

4.09

3.57

3.30

3.10

2.77

2.63

2.16

__

Dec

2.16

2.18

1.97

1.93

1.48

1.56

1.94

2.41

2.74

2.68

3.26

3.64

3.59

3.38

3.18

2.66

2.53

3.14

2.33

2.44

2.46

1.88

2.22

2.18

2.31

2.12

2.45

3.12

3.83

4.06

..

TABLES 71
Table 10a. Mean daily ground-water levels in observation well CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

5.72

5.85

6.32

6.22

6.37

6.35

6.71

7.68

7.92

7.95

7.94

8.33

7.84

7.44

7.23

8.26

8.28

7.08

6.96

6.73

6.99

6.49

6.21

6.04

5.85

5.56

5.68

5.31

5.24

5.53

Feb Mar Apr May Jun Jul

1999

5.13

4.91

7.20

5.47

5.10

5.04

4.77

4.53

4.38

4.60

5.67

4.38

4.53

4.79

4.79

5.44

5.82

5.58

5.60

5.83

5.20

5.18

4.90

4.81

4.90

5.07

5.34

4.90

--

--

--

Aug Sep Oct Nov Dec

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

..

--

--

72 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10b. Mean daily ground-water levels in observation well CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999

[Water levels measured as feet below land surface; , value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1997

--

--

--

--

--

..

--

--

--

--

--

5.34

5.34

5.48

5.43

5.22

5.25

5.25

5.27

5.29

5.32

5.51

5.79

5.44

5.41

5.86

5.76

5.97

Aug

5.71

5.45

5.24

5.37

5.79

5.73

5.74

5.30

5.26

5.18

5.34

5.01

5.21

5.20

4.74

5.58

5.21

5.51

5.12

5.30

5.38

5.61

5.59

5.32

5.21

5.32

5.26

5.35

5.35

5.59

6.24

Sep

6.27

6.30

6.18

6.01

5.47

6.18

6.12

6.24

5.79

5.48

5.41

5.32

3.62

3.38

3.18

3.38

3.33

3.37

3.41

3.54

3.50

3.32

3.92

5.09

5.42

5.04

5.35

5.29

4.62

5.26

Oct

5.16

5.56

5.32

5.31

5.37

5.03

5.08

5.23

5.53

5.68

5.41

5.35

5.18

5.92

6.69

6.81

7.12

6.77

6.84

7.43

7.54

7.45

7.70

7.86

7.53

6.11

3.68

4.04

3.89

4.35

3.40

Nov

3.45

2.87

4.00

4.00

4.41

4.52

5.01

5.64

5.69

6.10

6.16

6.05

6.50

--

--

--

--

--

--

7.53

7.04

7.05

7.08

7.28

7.34

7.23

7.26

7.55

7.57

7.69

Dec

8.39

8.63

9.45

9.68

9.38

9.20

8.14

8.12

8.62

8.55

8.39

6.29

5.07

4.79

4.89

4.90

4.80

5.39

5.20

5.06

4.62

4.89

4.52

4.74

5.18

4.94

4.86

4.47

4.75

4.65

TABLES 73
Table 10b. Mean daily ground-water levels in observation well CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

4.94

4.61

4.36

4.32

4.12

4.21

4.52

4.54

4.47

4.46

4.59

4.83

4.45

4.53

5.43

4.87

4.85

5.18

6.72

7.28

7.28

7.46

7.38

7.71

7.49

7.62

8.35

8.38

8.17

8.66

Feb

8.77

8.64

9.07

8.81

8.67

8.75

8.73

8.78

8.88

9.27

9.24

9.15

9.35

9.47

9.36

9.63

8.96

9.78

10.15

10.05

9.84

10.07

10.39

10.21

10.40

9.42

9.54

10.52

--

--

._

Mar

10.61

10.56

10.65

10.13

10.20

9.98

9.67

9.79

9.94

9.82

9.95

9.78

8.74

8.47

8.72

9.09

9.11

9.40

8.92

9.03

9.22

8.95

8.96

9.04

8.97

9.10

8.33

8.09

8.25

7.55

5.70

Apr

4.36

2.67

1.64

1.99

2.00

2.45

1.48

2.13

3.93

4.04

4.21

4.45

3.93

5.11

4.37

4.82

4.61

4.69

4.31

4.06

4.05

3.28

3.61

4.55

4.52

4.59

5.25

5.33

4.94

4.63

May

3.70

4.54

4.68

4.71

4.87

4.73

4.29

4.38

3.85

3.77

4.07

4.41

3.81

4.55

5.43

5.36

5.42

5.17

5.07

4.98

5.03

5.32

5.50

5.24

4.92

4.99

5.04

5.13

4.57

4.70

4.99

Jun

1998

4.89

5.04

4.20

3.60

3.11

2.82

2.84

2.50

2.73

2.50

2.10

2.23

1.91

-0.20

-0.75

0.69

0.99

1.65

1.75

1.38

0.82

-0.04

0.07

0.29

-0.84

-1.53

-1.23

-1.63

-1.03

-0.41

._

Jul

-0.55

-0.92

-1.68

-1.44

-0.28

0.59

1.67

2.22

2.38

2.58

2.84

2.86

3.10

3.76

3.92

4.16

4.11

4.27

4.57

4.50

4.41

4.11

4.25

4.59

4.87

4.64

4.24

4.33

4.21

4.31

4.79

Aug

4.07

3.94

3.50

3.55

4.04

3.90

3.66

3.91

3.85

3.77

4.05

4.31

3.76

3.22

3.08

3.09

2.94

3.28

3.54

3.55

3.46

2.95

3.49

3.55

3.11

3.04

3.00

2.83

2.86

2.98

3.10

Sep

2.47

2.75

3.57

3.05

2.97

3.12

3.13

3.29

3.53

2.90

2.23

2.24

3.31

3.71

3.31

3.56

3.34

3.39

3.91

3.93

3.29

3.11

2.83

2.60

3.06

3.17

2.68

2.58

4.19

5.00

__

Oct

5.43

5.17

5.11

5.30

5.44

5.37

5.44

5.87

5.23

5.02

5.02

5.24

5.11

4.87

4.88

4.98

4.96

4.60

4.88

4.60

4.52

4.30

4.55

4.78

4.52

4.63

4.72

4.87

5.42

4.24

5.10

Nov

5.11

4.83

5.08

5.53

5.51

5.76

5.71

5.70

5.35

5.03

5.68

5.87

5.50

5.70

5.46

5.51

5.37

5.73

5.51

5.63

5.65

6.03

5.89

5.90

6.04

5.31

5.00

-

-

-

Dec

-

-

-

-

~

-

-

-

~

-

-

-

-

-

2.93

2.48

2.58

3.12

4.18

4.51

4.03

3.29

3.52

3.53

3.39

3.26

3.32

3.20

3.39

3.27

74 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10b. Mean daily ground-water levels in observation well CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

3.47

3.40

3.66

3.35

3.52

3.66

3.69

4.15

4.10

4.11

4.37

4.35

4.18

4.19

4.52

4.03

4.18

4.28

4.51

4.79

4.45

4.59

4.23

4.48

4.57

3.36

3.39

3.18

3.13

3.32

Feb Mar Apr May Jun Jul

1999

3.08

3.29

2.27

3.45

2.88

2.43

2.90

2.90

2.34

2.31

1.55

2.27

2.43

2.29

2.64

2.43

2.18

2.17

2.21

2.71

2.43

2.56

2.33

2.28

2.32

2.49

2.28

2.61

--

--

-

Aug Sep Oct Nov Dec

..

--

--

--

--

--

--

--

--

--

..

--

--

..

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

..

TABLES 75
Table 10c. Mean daily ground-water levels in observation well CRM-3 (map ID #3), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

14.37

14.65

15.20

15.38

15.11

15.10

15.18

15.35

15.38

15.44

15.54

15.63

15.70

15.74

15.81

15.90

15.94

16.09

15.42

13.45

9.73

6.86

5.71

12.30 5.50

12.56 6.19

12.72 7.00

12.96 7.62

13.03 7.97

13.41

13.76

14.03

Mar

7.71

7.24

7.02

6.51

6.09

5.81

6.04

6.22

7.23

8.02

7.55

6.52

5.77

5.01

4.25

3.37

3.08

4.16

5.30

5.76

5.53

5.68

5.41

4.94

4.57

4.10

3.60

3.28

4.36

4.99

5.21

Apr

5.19

5.38

6.07

6.54

6.36

6.77

7.05

6.97

6.70

6.53

6.67

7.04

7.29

7.41

7.38

7.41

7.55

7.81

8.06

8.19

8.25

8.36

8.47

8.47

8.61

8.66

8.70

8.85

8.88

8.44

_.

May

8.62

7.94

7.24

6.57

6.27

6.18

6.16

6.09

6.19

6.21

6.33

6.54

6.73

6.94

7.27

7.63

7.91

8.24

7.67

8.06

8.14

8.27

8.34

8.45

8.51

8.54

8.55

8.44

8.28

8.39

8.39

Jun

1997

8.49

8.68

8.73

8.70

8.84

8.98

9.06

8.78

9.03

8.96

9.12

8.97

9.02

9.25

9.08

8.89

9.02

9.11

9.34

9.16

9.14

8.87

8.14

7.94

7.12

6.11

6.16

6.44

6.75

6.64

Jul

7.01

6.97

7.16

7.33

7.69

8.17

8.37

8.62

8.56

8.69

8.61

8.68

8.79

8.86

8.73

8.49

8.17

7.94

7.91

8.21

8.47

8.35

8.40

8.47

9.20

8.96

8.92

8.74

9.04

9.09

8.88

Aug

9.49

9.70

9.97

10.74

10.16

10.08

10.09

10.25

10.17

10.55

10.64

10.69

10.60

10.20

9.28

10.43

10.48

10.43

10.47

10.49

10.74

10.73

10.57

10.53

10.76

10.81

10.88

10.86

11.12

11.22

10.83

Sep

10.66

10.36

10.22

10.95

11.24

11.12

11.14

11.16

11.22

11.33

11.26

11.37

11.45

11.53

11.28

10.97

11.05

10.96

10.96

10.83

10.58

10.98

10.90

10.99

10.90

10.85

10.66

10.53

9.33

10.93

Oct

11.37

11.44

11.22

11.21

11.20

11.40

11.44

11.29

11.55

11.66

12.73

12.45

13.03

13.67

13.71

13.85

14.65

15.41

15.68

15.68

15.33

14.76

14.50

14.53

14.46

14.27

14.85

15.03

15.36

15.20

13.10

Nov

12.69

11.21

13.14

13.94

13.81

13.46

13.57

13.67

13.54

13.64

13.69

13.60

13.56

13.64

13.70

13.39

13.92

14.32

14.45

14.40

14.39

14.59

14.85

14.64

14.76

14.69

14.48

14.65

14.59

14.48

Dec

14.56

14.58

14.63

14.77

14.78

15.06

15.32

15.26

15.48

15.41

15.43

15.34

15.34

15.28

14.68

14.66

14.84

14.99

15.13

15.11

15.27

15.21

15.40

14.96

15.11

15.16

15.07

13.85

14.24

14.10

14.62

76 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10c. Mean daily ground-water levels in observation well CRM-3 (map ID #3), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

14.83

14.99

14.99

14.80

14.78

14.91

15.02

15.00

15.28

15.47

15.44

15.47

14.68

14.99

14.72

14.67

14.42

14.54

14.63

14.58

14.67

14.86

14.79

14.95

14.87

15.08

15.00

14.97

14.86

14.85

14.85

Feb

14.74

15.01

14.86

15.16

15.26

15.33

15.27

15.28

15.27

15.29

15.11

15.35

15.51

15.88

15.88

15.73

14.60

15.70

15.94

15.82

15.60

14.80

13.60

12.65

11.48

9.15

8.98

10.04

--

--

..

Mar

9.46

9.07

9.04

9.16

9.25

9.36

9.40

9.21

9.55

8.91

8.53

8.82

9.39

9.36

9.36

9.78

10.32

10.36

10.16

10.13

10.00

9.75

9.56

9.26

8.83

8.46

7.13

6.51

6.92

5.74

2.20

Apr

2.57

3.46

3.35

3.62

3.83

3.85

1.80

2.64

5.19

5.83

5.76

5.31

4.36

6.03

5.08

5.57

6.00

6.05

5.75

5.36

5.39

5.51

5.48

5.47

5.20

5.51

6.04

6.35

7.02

7.12

May

7.37

7.46

7.44

7.49

7.59

7.70

7.47

7.63

7.75

7.88

7.83

8.02

8.04

8.04

8.09

8.28

8.31

8.29

8.21

8.40

8.37

8.22

8.22

8.12

8.00

7.65

7.19

6.97

6.70

6.02

6.07

Jun Jul

1998

6.27

6.55

7.14

7.22

7.48

7.66

7.69

7.78

7.48

6.83

5.37

5.46

4.98

1.97

1.63

3.64

4.69

5.27

5.18

4.92

4.45

3.65

--

--

..

--

--

-

..

--

Aug

--

--

--

--

--

--

--

--

--

--

--

--

--

10.09

10.12

10.22

9.83

10.15

10.11

10.06

10.23

10.18

10.09

9.84

9.78

10.18

10.00

9.69

9.77

9.82

9.84

Sep

9.58

9.65

9.49

9.77

10.01

9.76

9.73

10.05

10.09

10.20

10.17

9.98

9.95

9.68

9.93

10.11

10.24

10.17

10.01

9.80

10.01

10.24

10.40

10.15

10.07

9.88

9.97

10.30

9.97

9.82

Oct

10.22

10.48

10.41

10.31

9.52

9.19

9.36

9.36

9.62

9.67

9.63

9.70

9.81

9.69

9.44

9.43

7.86

7.72

7.18

6.94

7.14

7.30

8.06

8.76

9.07

9.30

9.26

9.30

8.34

8.27

8.13

Nov

8.30

8.37

8.48

8.73

8.95

8.80

8.92

9.44

9.36

6.08

8.28

8.57

8.81

8.28

8.71

7.87

9.03

8.53

8.77

9.14

9.36

8.90

9.16

9.44

9.07

9.27

9.49

9.52

8.76

9.08

Dec

9.62

9.36

--

--

9.33

9.39

9.48

9.46

9.11

8.76

9.10

9.46

9.47

9.35

9.56

9.63

9.56

8.82

9.47

9.40

9.14

7.77

8.59

8.60

9.00

8.86

8.86

8.87

8.91

9.28

9.54

TABLES 77
Table 10c. Mean daily ground-water levels in observation well CRM-3 (map ID #3), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

9.37

9.46

9.50

9.30

9.47

9.51

9.18

9.67

9.44

9.51

9.29

9.48

9.31

9.51

9.23

9.26

8.28

8.52

9.39

9.33

9.27

8.83

9.09

9.35

8.74

9.13

9.24

9.23

8.58

8.47

9.10

Feb Mar Apr May Jun Jul

1999

9.17

9.07

7.14

8.62

8.64

8.64

8.59

8.55

8.39

8.17

6.82

7.78

7.04

7.66

7.81

7.70

7.72

7.74

7.97

7.71

7.25

7.97

8.42

8.51

8.70

8.67

8.20

8.60

--

--

-

Aug Sep Oct Nov Dec

--

-

..

..

--

--

--

--

--

-

-

-

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

78 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10d. Mean daily ground-water levels in observation well CRM-4 (map ID #4), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through June 1998

[Water levels measured as feet below land surface; , value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

14.28

14.68

15.27

15.37

14.90

14.92

15.07

15.12

15.24

15.45

15.56

15.56

15.66

15.76

15.84

15.85

15.98

16.11

15.42

13.16

8.96

6.11

5.00

11.80 4.94

12.14 5.62

12.44 6.45

12.75 7.05

12.71 7.42

13.20

13.72

14.00

Mar

7.05

6.60

6.35

5.80

5.30

4.92

5.33

5.68

6.75

7.55

6.91

5.76

4.78

4.11

3.17

2.36

2.22

3.33

4.55

5.00

4.75

4.83

4.61

4.08

3.68

3.25

2.75

2.91

3.54

4.26

4.45

Apr

4.40

4.61

5.34

5.76

6.12

6.26

6.30

6.11

5.86

5.71

5.94

6.19

6.49

6.60

6.57

6.65

6.76

6.99

7.22

7.43

7.52

7.62

7.71

7.78

7.88

7.91

7.91

7.91

7.93

7.93

..

May

7.78

7.12

6.15

5.66

5.29

5.13

5.19

5.18

5.22

5.29

5.36

5.55

5.73

5.97

6.31

6.66

6.89

7.64

6.66

7.13

7.07

7.27

7.49

7.63

7.68

7.76

7.72

7.57

7.41

7.40

7.45

Jun

1997

7.52

7.52

7.76

7.98

8.16

8.24

8.12

8.48

8.86

8.67

8.21

8.24

8.27

8.15

8.09

8.00

8.14

8.20

8.41

8.29

8.15

7.63

6.63

6.67

5.69

4.96

4.79

4.78

5.45

5.27

__

Jul

5.88

5.89

5.93

6.12

6.45

6.66

7.18

7.15

7.56

7.83

7.66

7.30

7.29

7.27

7.18

6.69

6.37

6.28

6.22

6.54

6.66

6.78

6.86

7.07

8.32

8.57

8.44

8.34

8.20

8.33

7.97

Aug

7.82

8.10

8.52

9.30

8.60

8.36

8.38

8.52

8.65

8.65

8.65

8.80

8.76

7.82

6.67

8.42

9.35

10.16

9.46

8.81

9.72

10.23

9.73

8.85

9.54

9.09

9.36

9.09

9.64

9.95

10.47

Sep

10.23

9.82

9.58

10.51

10.10

9.39

9.52

9.79

9.80

9.65

9.65

9.65

9.65

9.65

9.65

8.22

9.27

9.16

9.07

10.02

9.77

10.17

10.14

9.68

9.08

8.68

7.86

6.83

9.36

8.97

Oct

10.63

10.19

7.56

9.50

9.35

9.99

10.34

9.60

10.83

11.32

11.80

10.22

11.42

13.57

13.52

13.58

14.60

14.75

14.74

15.46

15.00

14.34

13.23

13.30

13.85

12.75

14.04

13.38

14.28

13.17

._

Nov

--

--

--

13.15

13.62

13.17

13.32

13.17

12.62

13.24

13.33

12.68

11.87

12.43

12.77

13.01

13.57

13.59

13.65

12.94

12.53

12.95

14.20

14.09

12.50

12.66

11.30

12.60

13.24

12.93

__

Dec

13.89

13.62

13.22

13.65

12.78

13.31

14.11

13.59

14.03

13.37

14.67

14.58

13.74

14.28

12.76

13.02

12.98

13.45

13.53

14.60

14.05

13.27

13.90

11.82

13.37

13.27

13.10

10.13

9.95

11.60

14.05

TABLES 79
Table 10d. Mean daily ground-water levels in observation well CRM-4 (map ID #4), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through June 1998-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

13.13

12.95

13.44

13.33

12.68

13.30

13.55

11.74

12.51

14.66

14.61

13.95

14.02

13.81

12.79

13.38

12.72

13.54

13.63

12.83

12.70

13.21

12.52

13.20

12.55

13.93

15.07

14.83

14.95

14.96

14.86

Feb

14.75

14.42

13.97

14.33

14.84

14.82

15.17

15.23

15.34

15.33

15.28

15.45

15.68

15.48

16.23

16.15

16.12

16.19

16.29

16.25

15.88

15.20

13.91

12.52

11.55

10.76

10.21

9.72

--

--

--

Mar

9.11

8.84

8.72

8.70

8.00

8.16

8.79

9.13

9.04

9.06

9.24

8.93

8.95

8.92

9.14

9.13

9.83

10.26

10.37

10.01

9.63

9.52

8.98

8.25

8.56

7.98

7.39

6.92

6.97

6.64

3.81

Apr

3.18

2.81

2.58

2.10

2.83

3.39

3.15

3.82

4.89

4.84

4.94

5.12

5.16

5.49

5.49

5.52

5.19

4.91

5.23

5.03

4.42

4.34

4.97

5.12

5.24

5.41

5.00

5.33

6.31

6.92

--

May

6.92

7.02

7.21

7.32

7.34

7.44

7.40

7.55

7.63

7.60

7.73

7.63

7.72

7.91

7.92

7.52

7.32

7.94

8.15

8.02

8.17

8.16

8.14

8.14

8.01

7.61

7.19

7.05

6.80

6.42

6.23

Jun Jul

1998

6.47

6.81

7.20

7.37

7.25

6.74

6.76

7.31

7.53

7.03

6.24

5.44

4.10

2.81

2.20

3.10

4.11

4.44

4.20

3.99

3.74

2.58

--

--

..

--

--

--

--

--

--

Aug Sep Oct Nov Dec

--

--

--

..

--

--

--

--

--

--

--

..

--

--

--

--

--

..

--

--

--

--

--

--

..

--

--

--

..

80 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10e. Mean daily ground-water levels in observation well CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; , value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

5.97

5.93

6.29

6.55

6.33

6.15

6.02

6.43

6.13

6.09

6.30

6.36

6.33

6.48

6.17

6.59

6.42

6.43

5.66

4.53

1.92

0.43

0.24

4.68 0.16

4.81 -0.04

4.77 -0.03

4.95 0.27

5.47 0.78

5.29

5.31

5.40

Mar

0.47

0.24

0.03

-0.62

-1.26

-1.47

-1.36

-1.30

-0.07

0.35

-0.34

-1.49

-1.85

-2.43

-2.63

-2.99

-2.32

-2.59

-2.30

-1.93

-2.19

-2.08

-2.00

-2.09

-2.15

-2.16

-2.18

-2.90

-2.10

-2.06

-1.87

Apr

-1.89

-1.84

-1.89

-1.66

-2.61

-1.92

-0.84

-1.17

-1.55

-1.62

-1.57

-1.44

-1.16

-0.96

-1.11

-0.82

-0.88

-1.17

-1.02

-0.90

-0.78

-0.70

-0.61

-0.59

-0.19

-0.13

-0.31

-0.23

-0.25

-1.32

__

May

-0.37

-1.07

-1.23

-1.33

-1.51

-1.51

-1.65

-1.72

-1.57

-1.68

-1.79

-1.79

-1.79

-1.91

-1.64

-1.42

-1.40

-1.07

-0.88

-0.33

-0.44

-0.40

-0.52

-0.57

-0.55

-0.49

-0.35

-0.71

-0.97

-0.92

-0.96

Jun

1997

-1.06

-1.05

-0.70

-0.56

-0.56

-0.46

-0.48

-0.41

-0.27

-0.26

-0.38

-0.41

-0.31

-0.09

-0.33

-0.35

-0.11

-0.08

0.13

0.17

0.07

-0.01

-0.20

-0.10

-0.20

-1.24

-1.84

-2.10

-2.04

-2.08

Jul

-2.00

-2.02

-2.09

-1.93

-1.61

-1.42

-1.05

-1.08

-0.67

-0.48

-0.53

-0.63

-0.76

-0.65

-0.53

-0.76

-0.89

-0.77

-0.41

-0.01

0.23

0.34

0.29

0.43

0.60

0.59

0.69

1.09

1.33

1.25

1.22

Aug

1.09

1.16

1.33

1.98

1.98

1.83

1.86

1.67

1.60

2.09

2.40

1.93

1.75

1.14

0.52

0.98

1.18

1.32

1.06

1.04

0.99

1.04

1.03

1.00

0.93

0.99

0.93

0.95

1.10

1.14

1.30

Sep

1.20

0.78

0.61

1.00

0.87

0.93

0.95

0.95

0.89

0.86

0.77

0.75

0.74

0.77

0.72

0.46

0.64

0.43

0.27

0.31

0.18

0.18

0.23

0.04

-0.12

-0.15

-0.37

-0.54

-0.95

-0.14

Oct

0.04

0.27

0.14

0.46

0.56

0.64

0.62

0.64

0.88

0.95

1.21

0.99

1.34

1.95

2.02

2.09

2.70

2.90

3.31

3.68

3.51

3.07

2.80

2.74

2.67

2.63

2.75

3.10

3.21

3.04

2.11

Nov

1.85

1.29

1.96

2.25

2.38

2.24

2.21

1.91

1.75

1.84

1.79

1.70

1.54

1.66

1.86

1.77

1.87

1.75

1.71

1.81

1.90

1.87

1.94

2.06

1.80

1.79

1.65

1.79

1.79

1.78

Dec

1.81

1.78

1.69

1.72

1.89

1.94

1.95

2.00

1.88

1.94

2.16

2.16

1.99

1.90

1.82

1.83

1.86

1.84

1.91

2.14

1.95

1.92

1.94

1.60

1.81

1.93

1.81

1.13

1.28

1.35

1.87

TABLES 81
Table 10e. Mean daily ground-water levels in observation well CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

1.77

1.66

1.66

1.66

1.73

1.62

1.66

1.39

1.54

1.66

1.68

1.67

1.52

1.44

1.28

1.14

1.16

1.12

1.12

1.17

1.21

1.20

1.25

1.18

1.26

1.22

1.29

1.13

1.26

1.24

1.23

Feb

1.05

1.41

1.58

1.38

1.27

1.30

1.34

1.39

1.47

1.55

1.23

1.52

1.61

1.66

1.74

1.58

1.02

1.47

1.75

1.71

1.46

1.20

0.78

0.27

-0.13

-1.10

-1.22

-0.81

~

-

_

Mar

-0.85

-0.89

-1.00

-1.01

-0.91

-0.97

-1.08

-1.44

-1.06

-1.68

-1.79

-1.83

-1.40

-1.39

-1.52

-1.22

-1.21

-1.30

-1.32

-1.50

-1.66

-1.79

-1.81

-1.80

-1.71

-1.72

-2.01

-2.08

-1.94

-2.27

-2.70

Apr

-2.31

-1.82

-1.85

-1.73

-1.79

-1.82

-2.67

-2.61

-1.96

-1.94

-1.90

-1.97

-2.38

-1.76

-2.12

-1.92

-1.87

-1.84

-1.87

-1.79

-1.90

-1.85

-1.86

-1.75

-1.98

-1.96

-1.73

-1.76

-1.91

-1.71

..

May

-1.74

-1.75

-1.69

-1.68

-1.69

-1.72

-1.87

-1.69

-1.82

-1.87

-1.75

-1.72

-1.82

-1.74

-1.68

-1.72

-1.70

-1.74

-1.73

-1.84

-1.78

-1.71

-1.71

-1.72

-1.78

-1.79

-1.77

-1.74

-1.77

-1.94

-1.90

Jun

1998

-1.87

-1.90

-1.81

-1.76

-1.87

-1.78

-1.74

-1.86

-1.76

-1.82

-2.16

-1.90

-1.76

-2.52

-2.43

-1.93

-1.83

-1.84

-1.84

-1.84

-1.87

-1.96

~

~

-0.18

-1.22

-1.83

-2.10

-2.05

-2.08

_

Jul

-2.00

-2.02

-2.09

-1.94

-1.62

-1.43

-1.05

-1.09

-0.68

-0.48

-0.53

-0.63

-0.76

-0.65

-0.53

-0.75

-0.89

-0.78

-0.41

-0.02

0.23

0.34

0.29

0.43

0.59

0.59

0.68

1.09

1.33

1.25

1.22

Aug

1.09

1.16

1.33

1.98

1.99

1.83

1.86

1.68

1.60

2.09

2.40

-

-

-1.77

-1.77

-1.75

-1.89

-1.70

-1.61

-1.62

-1.67

-1.82

-1.96

-2.25

-2.10

-2.05

-2.04

-2.07

-2.10

-2.15

-1.99

Sep

-2.05

-2.04

-2.44

-2.21

-2.12

-2.17

-2.34

-2.28

-2.13

-2.17

-2.28

-2.24

-2.15

-2.65

-2.37

-2.10

-2.21

-2.15

-2.38

-2.50

-2.58

-2.22

-2.05

-2.20

-2.27

-2.61

-2.47

-2.21

-2.31

-2.60

..

Oct

-2.13

-2.28

-2.37

-2.11

-2.38

-2.53

-2.54

-2.19

-2.33

-2.52

-2.57

-2.34

-2.35

-2.41

-2.39

-2.25

-2.80

-2.76

-2.49

-2.58

-2.79

-3.16

-2.52

-2.24

-2.46

-2.32

-2.48

-2.33

-2.68

-2.61

-2.28

Nov

-2.29

-2.67

-2.68

-2.38

-2.53

-2.56

-2.52

-2.16

-2.11

-4.09

-2.73

-2.29

-2.39

-2.81

-2.57

-2.99

-2.25

-2.66

-2.60

-2.43

-2.11

-2.59

-2.46

-2.05

-2.53

-2.34

-2.14

-1.74

-2.65

-2.51

..

Dec

-1.78

-1.96

-

-

-2.07

-2.04

-2.08

-1.98

-2.09

-2.54

-2.09

-1.96

-1.96

-1.95

-1.93

-2.14

-2.13

-2.30

-2.08

-2.05

-2.07

-2.95

-2.56

-2.66

-2.21

-2.29

-2.30

-2.39

-2.39

-2.37

-2.05

82 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10e. Mean daily ground-water levels in observation well CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-2.00

-1.94

-1.94

-1.98

-1.91

-1.90

-2.13

-1.99

-1.90

-1.84

-1.96

-1.81

-1.92

-1.90

-1.90

-1.82

-2.23

-2.12

-1.79

-1.76

-1.89

-2.07

-1.92

-1.91

-2.21

-1.87

-1.86

-1.88

-2.37

-2.48

-1.89

Feb Mar Apr May Jun Jul

1999

.1.82

.1.87

-2.50

-1.85

.1.89

.1.89

-1.80

.1.81

.1.92

.1.94

-2.30

.1.87

-2.32

.1.82

.1.79

.1.79

.1.84

-1.83

.1.99

.1.97

-2.59

-2.03

.1.92

.1.90

.1.96

-1.88

-2.13

.1.96

--

-

-

Aug Sep Oct Nov Dec

-

~

~

--

..

--

-

~

~

-

--

~

-

-

-

--

--

..

-

~

-

~

-

-

..

-

--

-

..

-

-

TABLES 83
Table 10f. Mean daily ground-water levels in observation well CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured in feet below land surface; --, value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

2.89

2.98

2.89

2.92

2.84

2.83

2.88

2.86

2.90

3.04

3.11

2.95

2.97

3.01

3.09

2.98

3.02

2.84

2.03

1.67

0.91

0.35

-0.14

2.99 0.06

2.88 0.86

2.90 1.50

2.97 1.67

2.85 1.79

2.83

2.98

2.97

Mar

1.58

1.59

1.41

1.24

1.09

0.88

1.18

0.07

0.96

2.01

2.02

1.62

1.19

0.79

0.20

-0.55

-0.85

-0.01

0.95

1.25

1.18

1.27

1.16

0.67

0.31

-0.11

-0.58

-0.54

0.13

0.79

0.97

Apr

0.96

1.00

1.54

1.77

1.93

2.04

2.17

2.05

1.94

1.85

1.96

2.05

2.28

2.38

2.31

2.39

2.40

2.46

2.62

2.67

2.72

2.73

-

2.66

2.75

2.71

2.70

2.81

2.82

2.67

__

May

--

--

2.21

1.93

1.62

1.70

1.61

1.48

1.65

1.62

1.65

1.79

1.92

2.02

2.24

2.36

2.47

2.47

2.27

2.55

--

2.49

2.60

2.68

2.67

2.71

2.76

2.66

2.50

2.71

2.69

Jun

1997

2.58

--

--

2.72

2.71

2.77

2.71

2.91

2.81

2.85

2.77

2.81

2.86

2.78

2.77

2.83

2.82

2.83

2.83

2.88

2.77

2.72

2.57

2.07

1.84

1.79

1.58

1.51

1.72

1.68

Jul

1.98

2.11

1.98

2.23

2.39

2.54

2.63

2.55

2.77

--

2.84

2.67

2.61

2.63

2.70

2.51

2.63

2.74

2.72

2.86

2.95

2.97

3.00

3.05

3.11

3.30

3.17

--

3.35

3.21

3.17

Aug

3.08

3.10

3.06

3.23

3.40

3.43

3.43

3.21

3.24

3.32

3.39

3.23

3.37

--

5.90

6.32

6.26

6.49

6.32

--

--

-

--

-

--

--

3.11

3.16

--

3.22

3.66

Sep

3.58

-

--

3.26

3.15

3.21

3.12

3.20

3.28

3.23

3.12

3.13

3.12

3.26

3.19

3.11

3.26

3.18

3.20

3.41

3.35

3.32

3.42

3.26

3.28

3.16

3.10

3.01

2.72

--

Oct

3.24

3.20

3.01

3.24

3.28

3.15

3.18

3.22

3.38

3.36

3.29

3.03

3.04

3.19

3.10

2.98

3.07

2.94

2.97

3.26

3.29

3.20

3.14

3.18

3.19

3.12

3.00

3.07

3.01

3.06

2.55

Nov

2.59

2.37

2.90

3.06

3.26

3.29

3.29

3.13

3.00

3.27

3.14

3.06

3.05

-

3.21

3.24

3.20

3.07

3.12

3.20

3.05

3.06

3.08

3.10

3.01

2.98

2.91

3.11

3.14

3.10

Dec

3.01

2.97

3.06

3.09

3.01

2.91

2.90

2.99

2.96

3.01

3.07

--

2.81

2.69

2.65

2.87

2.90

3.05

2.94

3.14

2.95

3.00

2.89

2.79

2.98

2.98

2.93

2.62

2.73

2.78

84 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10f. Mean daily ground-water levels in observation well CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-

2.96

2.88

2.85

-

-

-

-

2.91

2.85

2.91

2.85

3.04

2.93

2.79

2.89

2.82

2.71

2.68

2.69

2.78

2.74

2.78

2.71

2.81

-

2.75

2.80

2.82

2.65

2.79

Feb

2.66

2.79

2.96

2.84

2.70

2.72

2.66

2.67

2.72

2.82

2.58

2.59

2.70

2.80

2.74

2.76

2.39

2.67

2.86

2.75

2.55

2.50

~

2.54

2.49

2.11

2.10

2.39

-

--

_

Mar

2.51

2.56

2.59

--

2.74

2.73

2.60

2.46

2.76

2.66

2.37

1.93

1.62

2.69

2.75

2.83

2.65

2.64

2.49

2.50

2.53

2.47

--

2.55

2.30

2.21

1.93

1.95

2.01

1.63

0.21

Apr

-0.47

-0.88

-1.18

-0.79

-0.66

-0.58

-0.82

-0.28

0.68

1.00

0.99

0.85

0.67

~

1.09

1.33

1.34

1.40

1.05

0.86

0.90

1.06

0.93

1.10

1.07

1.33

1.87

2.08

-

2.17

..

May

2.14

2.20

2.36

2.42

2.46

2.48

2.27

2.57

2.40

2.40

2.46

2.48

2.73

2.76

2.61

2.93

3.07

2.62

2.94

3.86

2.85

3.51

2.82

2.67

2.51

2.46

2.34

2.36

2.12

1.98

2.04

Jun

1998

2.05

2.18

2.35

2.41

2.49

2.72

2.75

2.56

2.52

2.27

1.65

1.31

0.74

-0.74

-1.45

-0.44

0.46

0.75

0.70

0.52

0.20

-0.73

-1.35

-1.60

-2.44

-2.71

-2.48

-2.43

-2.13

-1.60

Jul

-1.44

-1.68

-2.29

-2.08

-1.08

0.02

0.78

1.00

1.21

1.55

1.92

1.98

2.05

2.15

2.29

2.50

-

2.50

2.61

2.57

2.58

2.49

2.61

-

2.96

2.86

2.62

2.62

2.62

2.74

3.00

Aug

3.10

3.07

2.90

2.92

3.09

2.89

2.74

2.88

2.83

-

2.84

2.98

2.87

~

2.60

2.67

2.55

2.77

2.91

2.91

2.83

2.49

2.62

2.57

2.57

2.62

2.60

2.48

2.49

2.59

2.67

Sep

2.55

-

2.50

2.51

2.54

2.56

2.59

2.76

2.88

2.81

2.66

2.63

2.69

2.60

~

3.03

2.92

2.91

2.99

3.05

2.86

3.13

3.03

2.93

3.08

3.02

2.95

-

2.94

2.93

Oct

2.89

2.87

2.95

2.95

2.81

2.91

2.74

2.73

2.67

2.68

2.68

2.71

2.70

2.72

2.82

2.84

2.50

2.40

2.35

2.16

2.08

2.42

2.59

2.61

2.53

2.61

2.63

2.81

2.05

2.31

2.41

Nov

2.47

2.35

2.37

2.58

2.52

2.55

2.75

2.96

3.22

1.38

-

2.67

2.70

2.20

2.57

1.98

2.67

2.27

2.46

2.53

2.86

2.43

2.47

2.88

2.44

2.67

2.78

3.05

2.10

2.33

Dec

2.94

2.84

-

2.93

2.46

2.33

2.62

2.57

2.59

2.72

2.80

2.70

2.71

2.82

2.90

2.84

3.26

1.99

2.74

-

-

2.23

2.57

2.58

2.44

2.33

2.32

2.28

2.38

2.51

TABLES 85
Table 10f. Mean daily ground-water levels in observation well CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-

2.63

2.70

2.63

2.73

2.78

2.67

2.68

2.69

2.74

2.57

2.78

2.70

2.68

2.66

2.73

2.42

2.59

2.89

2.84

2.57

2.36

2.45

2.56

2.57

2.62

2.63

2.62

2.56

2.55

2.59

Feb Mar Apr May Jun Jul

1999

2.64

2.38

1.99

2.46

2.40

2.49

2.33

2.31

2.34

2.06

1.84

2.49

2.25

2.34

2.34

2.50

2.51

2.52

2.36

2.43

2.39

2.44

2.52

2.58

2.56

2.51

2.27

2.50

--

--

-

Aug Sep Oct Nov Dec

--

--

--

--

..

--

-

..

--

--

--

--

-

--

--

--

--

--

-

--

--

--

--

--

--

-

--

--

-

--

-

86 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10g. Mean daily ground-water levels in observation well CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

3.04

2.99

2.99

2.94

3.05

3.06

3.09

3.10

3.07

3.03

2.96

3.04

2.99

2.99

3.01

3.10

3.02

2.88

2.02

1.77

0.98

0.18

0.04

3.04 0.31

2.89 1.01

2.93 1.57

3.00 1.84

3.12 1.96

3.07

2.96

3.03

Mar

1.66

1.49

1.59

1.32

1.04

1.10

1.26

0.02

1.00

2.25

2.10

1.62

1.23

0.97

0.30

-0.34

-0.63

0.08

1.14

1.38

1.18

1.31

1.17

0.85

0.50

-0.12

-0.51

-0.53

0.42

1.07

1.13

Apr

1.05

1.22

1.60

1.97

2.05

2.23

2.21

2.19

2.08

1.97

2.07

2.43

2.46

2.37

2.47

2.48

2.51

2.64

2.65

2.69

2.68

2.78

2.82

2.87

2.91

2.92

2.89

2.85

2.83

2.80

_.

May

2.79

2.52

2.46

1.99

1.84

1.64

1.68

1.77

1.70

1.78

1.86

2.03

2.20

2.34

2.52

2.57

2.59

2.47

2.67

2.79

2.83

2.86

2.85

2.81

2.84

2.86

2.87

2.84

2.89

2.84

2.87

Jun

1997

2.92

2.91

2.91

2.92

2.89

2.92

2.99

2.90

2.97

2.95

2.97

2.89

2.94

3.04

2.97

2.92

3.00

2.99

3.03

3.01

2.93

2.98

2.82

2.61

2.15

1.76

1.74

1.92

2.19

2.08

Jul

2.43

2.42

2.55

2.66

2.74

2.84

2.85

2.94

2.87

2.90

2.88

2.91

2.93

2.98

2.91

2.91

2.82

2.77

2.80

2.86

2.93

2.87

2.90

2.89

2.98

3.00

3.01

3.03

3.05

3.00

2.96

Aug

2.89

2.92

2.98

2.97

3.06

3.06

3.06

3.01

3.11

3.03

3.03

3.07

3.05

3.06

3.03

3.09

2.96

3.04

3.05

3.13

3.05

3.00

3.00

3.12

3.06

3.15

3.10

3.14

3.08

3.12

3.29

Sep

3.25

3.31

3.27

3.06

3.08

3.19

3.13

3.20

3.24

3.24

3.13

3.11

3.06

3.07

3.16

3.22

3.25

3.17

3.22

3.15

3.15

3.08

3.13

3.13

3.21

3.16

3.10

3.14

3.16

3.22

Oct

3.07

3.22

3.21

3.23

3.26

3.17

3.11

3.23

3.16

3.16

3.15

3.15

3.10

3.03

3.07

3.05

2.97

2.93

2.98

3.06

3.08

3.04

3.09

3.14

3.04

3.10

2.98

3.08

3.03

3.02

2.98

Nov

2.98

2.96

3.04

3.00

3.05

3.12

3.08

2.99

3.00

3.05

2.96

3.00

3.00

3.07

3.10

3.13

3.04

3.02

3.05

3.12

3.09

3.06

2.97

3.02

3.03

3.06

3.01

3.06

3.06

3.07

Dec

2.94

2.97

2.99

2.99

3.04

3.02

2.94

2.96

2.88

2.99

2.96

2.96

2.92

2.77

2.79

2.89

2.97

2.96

2.98

3.01

2.95

3.00

2.99

2.89

2.92

2.98

2.95

2.87

2.85

2.92

TABLES 87
Table 10g. Mean daily ground-water levels in observation well CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

3.15

3.08

2.99

2.90

3.00

3.04

2.88

2.98

2.96

3.01

3.02

3.28

3.07

2.92

3.15

2.97

3.04

3.05

2.92

2.93

3.00

2.86

3.00

2.88

3.03

2.93

3.03

2.94

2.89

2.97

Feb

2.75

2.92

2.95

2.97

3.08

3.06

2.98

2.96

2.89

2.95

2.62

2.85

2.86

3.01

2.93

2.80

1.84

2.71

3.05

2.89

2.90

2.76

2.73

2.90

2.67

1.23

1.37

2.71

--

~

..

Mar

2.91

2.86

2.96

2.82

2.73

2.76

2.81

2.63

2.95

2.98

2.63

2.21

1.79

2.80

3.03

3.02

2.87

2.94

2.78

2.89

2.88

2.86

2.76

2.57

2.66

2.63

1.91

1.80

2.11

1.15

-1.08

Apr

-1.02

-0.71

-1.03

-0.96

-0.59

-0.42

-1.86

-1.16

0.71

1.10

1.10

0.90

0.06

1.66

0.69

1.22

1.48

1.48

1.36

1.03

1.08

1.09

1.15

1.29

0.98

1.17

1.76

1.92

2.11

2.38

May

2.53

2.62

2.67

2.67

2.79

2.81

2.38

2.71

2.68

2.71

2.68

2.75

--

2.78

2.74

2.92

2.94

2.79

3.10

3.61

3.04

3.27

2.93

2.77

2.71

2.66

2.48

2.49

2.24

1.97

2.17

Jun

1998

2.16

2.29

2.60

2.58

2.75

2.67

2.65

2.69

2.71

2.53

1.52

1.38

0.96

-1.60

-2.03

-0.30

0.53

1.08

1.04

0.80

0.32

-0.50

-1.25

-1.42

-2.21

-2.53

-2.16

-2.45

-1.91

-1.42

Jul

-1.23

-1.51

-2.12

-1.95

-1.00

0.12

0.82

1.31

1.53

1.72

1.89

2.08

2.19

2.41

2.62

2.73

2.75

2.66

2.78

2.78

2.77

2.80

2.90

2.79

2.86

2.92

2.90

2.77

2.94

2.95

3.05

Aug

3.27

3.03

3.14

3.12

2.97

2.92

2.92

2.87

2.85

2.93

2.86

2.91

2.92

2.92

2.86

3.01

2.87

2.82

2.91

2.93

2.92

2.78

3.02

3.04

2.93

3.04

2.98

2.85

2.93

3.05

2.98

Sep

2.92

2.91

2.98

2.93

2.97

2.87

2.96

2.99

2.97

3.00

3.07

2.94

2.90

3.04

2.97

2.93

3.03

3.03

3.17

3.20

3.05

3.00

3.03

2.94

3.15

3.25

3.11

3.04

2.93

2.96

Oct

3.01

2.99

3.05

2.95

2.96

2.83

2.88

2.92

2.80

2.89

2.89

2.80

2.83

2.83

2.69

2.77

2.71

2.48

2.35

2.35

2.31

2.45

2.61

2.54

2.63

2.66

2.75

2.74

2.82

2.25

2.42

Nov

2.30

2.57

2.54

2.54

2.56

2.81

2.91

2.71

2.56

1.84

2.66

2.63

2.56

2.66

2.61

2.34

2.68

2.63

2.70

2.69

2.62

2.83

2.76

2.68

2.87

2.72

2.77

2.75

2.44

2.71

Dec

2.75

2.87

3.01

2.92

2.83

3.00

2.77

2.75

3.03

3.11

3.02

2.75

2.89

2.98

2.80

2.97

2.97

2.39

3.02

3.04

2.60

2.61

3.00

2.99

2.56

2.47

2.55

2.50

2.49

2.67

88 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10g. Mean daily ground-water levels in observation well CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

2.87

2.89

2.86

2.73

2.96

3.02

2.90

2.83

2.77

2.69

3.03

2.99

2.89

2.68

2.79

2.02

2.21

2.82

2.86

2.83

2.36

2.61

2.76

2.93

2.84

2.79

2.81

2.99

2.99

2.79

Feb Mar Apr May Jun Jul

1999

2.84

2.77

1.30

2.53

2.63

2.58

2.78

2.74

2.46

2.16

1.45

2.47

2.53

2.29

2.67

2.53

2.45

2.46

2.57

2.58

2.74

2.66

2.66

2.66

2.77

2.77

2.25

2.69

--

..

--

Aug Sep Oct Nov Dec

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 89
Table 10h. Mean daily ground-water levels in observation well CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999

[Water levels measured as feet below land surface; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1997

-

-

--

--

--

-

..

--

--

--

--

..

..

--

4.34

4.30

4.32

4.27

4.32

4.34

4.34

4.40

4.41

4.44

4.36

4.45

4.41

4.55

4.63

4.64

4.78

Aug

4.79

4.72

4.55

4.64

4.71

4.72

4.73

4.64

4.56

4.54

4.58

4.43

4.51

4.28

4.16

4.35

4.32

4.37

4.23

4.53

4.58

4.74

4.67

4.39

4.34

4.30

4.23

4.21

4.20

4.37

4.65

Sep

4.61

4.51

4.40

4.26

4.02

4.51

4.53

4.56

4.29

4.26

4.20

4.26

3.19

2.86

2.61

2.63

2.81

2.83

2.93

3.06

2.94

2.92

3.38

3.99

4.27

4.31

4.13

4.10

4.00

4.29

Oct

4.26

4.40

4.28

4.41

4.43

4.37

4.42

4.41

4.59

4.55

4.56

4.44

4.48

4.86

5.58

5.77

5.84

5.82

5.93

6.13

6.22

6.31

6.43

6.55

6.66

5.64

4.08

4.39

4.35

4.32

4.03

Nov

4.04

3.89

4.27

4.39

4.42

4.39

4.68

5.32

5.41

5.65

5.69

5.64

5.70

--

--

--

--

--

--

6.67

6.61

6.66

6.78

6.77

6.67

6.75

6.62

6.73

6.72

6.85

Dec

7.51

7.73

7.95

8.12

8.14

8.08

7.17

6.85

7.08

7.07

7.13

5.86

5.02

4.80

4.63

4.61

4.59

4.69

4.85

4.78

4.61

4.61

4.60

4.44

4.57

4.52

4.40

4.18

4.21

4.16

90 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10h. Mean daily ground-water levels in observation well CRM-11 (map ID #9), West Well Field, Cedar Rapids, 

Iowa, July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

3.86

3.79

3.65

3.55

3.56

3.53

3.49

3.57

3.67

3.65

3.68

3.78

3.70

3.87

4.56

4.38

4.70

4.97

5.76

6.12

6.31

6.35

6.46

6.43

6.52

6.50

6.62

6.85

6.95

6.97

Feb

7.13

7.22

7.33

7.38

7.42

7.45

7.46

7.48

7.50

7.51

7.70

7.74

7.88

8.03

8.01

8.06

8.37

8.34

8.37

8.51

8.67

8.70

8.78

8.94

8.93

9.19

9.19

8.92

~

~

Mar

8.85

8.85

8.86

8.91

8.78

8.62

8.48

8.46

8.51

8.42

8.39

8.14

7.48

7.23

7.41

7.53

7.51

7.56

7.65

7.84

7.95

7.75

7.65

7.54

7.39

7.29

7.13

7.02

6.87

6.90

6.23

Apr

3.98

1.67

0.79

0.65

0.66

0.73

1.24

1.63

1.77

1.98

1.97

1.97

2.26

2.16

2.36

2.34

2.24

2.25

2.09

1.85

1.90

1.53

1.73

2.09

2.47

2.69

2.74

2.87

3.01

2.77

__

May

2.19

2.85

2.97

3.02

3.09

3.05

3.03

3.03

3.10

3.08

2.99

3.03

3.14

3.30

3.55

3.69

3.65

3.60

3.61

3.58

3.51

3.39

3.44

3.30

3.26

3.21

3.14

3.03

2.88

2.91

2.92

Jun

1998

2.96

3.12

2.90

2.57

2.52

2.21

2.13

2.07

2.06

2.05

2.09

1.70

1.19

0.77

0.04

0.17

0.44

0.65

0.60

0.33

0.25

-0.25

-0.56

-0.88

-1.91

-2.32

-2.20

-2.15

-1.97

-1.49

Jul

-1.08

-1.35

-1.85

-1.75

-0.90

-0.07

0.48

'1.02

1.24

1.36

1.53

1.59

1.68

2.03

2.17

2.27

2.28

2.28

2.31

2.26

2.14

2.17

2.40

2.49

2.58

2.57

2.51

2.47

2.59

2.66

2.67

Aug

2.29

2.31

2.33

2.40

2.59

2.72

2.51

2.48

2.38

2.54

2.73

2.70

2.41

2.18

2.17

2.23

2.14

2.18

2.28

2.32

2.35

2.20

2.25

2.34

2.37

2.43

2.41

2.30

2.34

2.43

2.41

Sep

2.09

2.11

2.61

2.45

2.43

2.37

2.45

2.56

2.66

2.54

2.43

2.41

2.90

2.94

3.03

3.09

3.10

3.11

3.08

3.12

3.20

2.86

2.78

2.87

2.91

2.94

2.97

2.90

3.46

3.99

Oct

4.13

4.19

4.33

4.29

4.04

4.25

4.47

4.46

4.08

4.06

4.05

4.06

4.05

4.03

3.95

4.06

3.78

3.70

3.67

3.50

3.48

3.42

3.51

3.63

3.63

3.70

3.80

3.87

3.84

3.40

3.72

Nov

3.70

3.62

3.67

3.79

3.81

3.88

3.83

3.86

3.87

4.21

4.07

4.01

3.88

3.96

3.91

4.04

3.99

3.93

3.99

4.04

4.04

4.11

4.21

4.08

4.16

3.98

3.71

3.57

3.68

3.67

Dec

3.68

3.59

3.61

3.12

2.42

2.29

2.37

2.41

2.45

2.44

2.46

2.49

2.55

2.57

2.56

2.52

2.51

3.00

3.27

3.30

3.10

2.76

2.82

2.80

2.73

2.48

2.43

2.43

2.62

2.57

TABLES 91
Table 10h. Mean daily ground-water levels in observation well CRM-11 (map ID #9), West Well Field, Cedar Rapids, 

Iowa, July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

2.54

2.54

2.53

2.40

2.48

2.58

2.85

2.90

2.95

2.96

3.00

3.05

2.98

2.99

3.16

3.31

3.43

3.38

3.33

3.36

3.43

3.30

3.29

3.23

3.13

2.78

2.66

2.55

2.53

2.54

Feb Mar Apr May Jun Jul

1999

2.50

2.56

2.94

3.20

2.71

2.60

2.52

2.59

2.56

2.43

2.20

2.25

2.26

2.15

2.19

2.22

2.26

2.29

2.35

2.38

2.36

2.34

2.41

2.41

2.48

2.43

2.59

2.53

--

--

--

Aug Sep Oct Nov Dec

--

--

--

--

--

--

-

..

-

--

--

-

-

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

92 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10i. Mean daily ground-water levels in observation well CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa, 

July 1997 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1997

--

..

--

--

--

--

--

--

-

--

..

--

--

--

15.40

14.80

14.38

13.85

13.38

12.93

12.59

12.54

12.31

12.16

11.93

12.29

12.28

12.21

12.04

11.71

11.67

Aug

11.70

11.59

11.65

11.65

11.53

11.46

11.33

11.04

10.78

11.02

11.00

10.58

10.57

10.01

9.50

9.43

9.30

9.78

11.48

12.31

11.63

10.61

9.53

8.67

8.02

7.21

6.96

7.87

10.22

10.44

11.39

Sep

10.02

9.03

7.02

5.91

5.41

5.86

4.54

4.30

3.92

3.32

2.75

3.04

3.99

4.58

5.14

6.31

6.75

6.65

7.19

7.00

6.72

6.92

7.05

6.93

6.79

7.09

7.14

6.98

6.58

8.02

Oct

7.95

7.58

7.37

7.40

7.78

7.66

8.50

8.83

9.10

8.70

8.51

7.97

7.77

7.68

7.20

7.01

7.17

7.17

7.07

7.25

7.27

7.41

7.86

9.51

10.44

10.24

12.58

14.42

15.92

17.06

17.96

Nov

19.05

19.76

20.94

21.97

22.71

23.08

23.66

23.98

23.79

23.72

23.66

23.65

24.13

24.66

25.18

25.34

25.67

25.09

25.91

25.87

25.95

26.08

25.67

24.23

23.26

23.60

23.67

23.58

23.44

23.28

Dec

23.44

22.73

21.61

21.60

21.51

21.31

21.29

20.93

19.82

18.86

19.25

19.07

18.61

18.49

18.02

17.71

17.41

17.92

18.42

17.49

16.05

15.20

14.76

14.86

14.54

13.99

14.78

15.06

15.42

15.05

TABLES 93
Table 10i. Mean daily ground-water levels in observation well CRM-12 (map ID #10), East Well Field, Cedar Rapids, 

Iowa, July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

14.79

15.11

14.85

15.25

15.72

17.42

17.41

17.95

18.56

19.97

21.18

22.17

22.60

22.36

22.78

23.20

23.52

24.71

25.79

25.42

25.10

25.16

25.18

25.39

25.38

25.53

25.60

25.81

25.81

26.03

Feb

25.91

26.65

27.34

26.34

26.07

27.08

26.68

25.97

25.69

25.58

25.08

25.20

25.12

25.03

24.87

24.72

24.32

24.73

25.13

25.13

24.98

25.01

25.08

24.88

24.17

22.31

21.69

21.59

--

--

Mar

21.15

20.55

20.45

20.79

19.71

19.97

19.92

18.98

19.16

19.07

20.18

21.34

21.89

21.06

20.31

21.41

22.04

22.33

22.47

22.60

22.77

23.25

24.09

24.39

23.15

21.78

21.15

19.64

17.71

17.15

17.43

Apr

16.33

15.16

10.57

6.96

4.60

2.87

0.93

0.84

3.49

3.84

2.42

1.59

1.29

6.34

7.26

6.68

3.97

3.07

2.50

4.43

4.99

7.43

8.69

6.81

3.78

4.85

10.16

9.77

11.92

12.90

May

14.02

13.85

12.05

12.19

13.08

11.96

11.41

12.12

11.02

9.68

9.99

12.12

11.89

11.79

11.99

11.38

10.36

9.64

9.52

10.24

10.65

10.88

10.86

10.46

9.84

9.47

11.20

12.11

12.42

12.37

13.09

Jun

1998

13.27

13.19

13.42

13.38

13.86

14.96

16.89

18.22

19.58

20.24

19.80

20.06

18.59

15.67

11.35

11.33

11.83

11.95

13.18

14.09

14.30

12.91

11.14

7.31

2.99

0.60

0.66

0.21

0.17

0.60

.-

Jul

0.69

0.51

0.04

-0.25

0.82

2.27

2.80

3.41

5.78

6.82

6.21

5.98

5.18

3.87

3.73

3.80

3.75

3.84

3.35

2.34

1.71

1.07

0.91

1.12

1.23

1.08

1.00

1.22

1.17

1.41

2.98

Aug

2.79

2.42

1.81

1.72

1.66

1.00

0.56

0.89

0.90

0.73

1.12

1.55

2.20

2.96

3.39

2.30

2.30

2.87

2.53

3.91

3.49

2.80

2.97

3.94

4.62

4.52

5.36

6.11

6.36

6.71

7.08

Sep

7.32

7.37

7.10

6.98

7.16

7.52

7.06

7.58

7.35

7.74

7.96

8.42

8.45

7.69

6.90

6.29

5.59

4.95

4.58

4.43

4.08

4.13

4.17

4.12

4.24

4.25

4.37

4.39

6.03

8.05

Oct

7.01

5.62

4.99

4.70

3.78

3.33

3.37

3.85

3.91

3.92

3.88

3.81

3.10

3.31

2.89

3.15

2.44

1.86

1.56

1.27

1.44

2.13

3.46

3.53

3.61

4.59

4.74

4.32

4.09

2.56

2.72

Nov

2.70

2.19

2.16

2.64

2.16

1.48

1.23

1.36

5.59

6.96

8.15

7.21

6.04

4.62

4.09

3.58

5.28

6.32

7.02

5.49

4.83

4.66

4.70

4.47

4.08

3.73

3.43

3.02

2.26

2.40

Dec

2.54

2.62

2.47

2.34

1.95

2.13

2.29

2.77

3.06

3.14

3.46

3.86

3.77

3.54

3.39

2.93

2.84

2.30

2.73

2.81

2.84

2.63

2.74

2.75

2.71

2.53

2.84

3.37

4.03

4.47

94 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10i. Mean daily ground-water levels in observation well CRM-12 (map ID #10), East Well Field, Cedar Rapids, 

Iowa, July 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

6.18

6.32

6.53

6.58

6.65

6.62

7.15

7.79

8.06

8.20

8.45

8.56

8.14

7.68

7.46

7.31

7.69

7.67

7.37

7.00

6.82

6.73

6.78

6.48

6.28

6.10

6.05

5.75

5.77

5.86

Feb Mar Apr May Jun Jul

1999

5.65

5.45

5.63

5.83

5.61

5.60

5.28

5.03

4.90

4.88

4.67

4.86

4.95

5.21

5.28

5.94

6.53

6.32

6.26

6.20

5.83

5.53

5.40

5.36

5.45

5.69

5.24

5.09

--

--

--

Aug Sep Oct Nov Dec

--

..

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

-

--

--

--

--

-

--

--

-

--

..

--

--

TABLES 95
Table 10j. Mean daily ground-water levels in observation well CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; , value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

12.13

12.21

12.20

12.23

12.27

12.42

12.63

12.72

12.86

12.97

13.05

13.16

13.25

13.51

13.62

13.71

13.69

13.50

13.72

13.51

13.27

12.35

11.30

11.05 10.27

11.05 8.94

11.04 7.97

11.05 7.38

11.23 6.86

11.24

11.52

12.14

Mar

6.58

6.51

6.38

6.14

5.92

5.60

5.32

5.06

4.99

4.90

5.09

4.99

4.69

4.48

4.01

3.63

3.01

2.29

2.27

2.35

2.53

2.45

2.59

2.75

2.91

2.72

2.61

3.38

2.03

1.84

1.82

Apr

1.87

1.95

2.12

2.29

4.07

3.67

3.10

3.21

3.43

3.70

3.92

3.92

4.15

4.20

4.29

4.41

4.61

4.85

4.91

5.14

5.39

5.63

5.92

6.35

6.48

6.54

6.55

6.39

6.52

7.76

..

May

6.56

6.70

6.62

6.65

6.28

6.10

5.70

5.48

5.03

4.63

4.23

4.16

4.17

4.38

4.34

4.29

4.39

4.97

4.38

4.08

3.94

4.05

4.27

4.21

4.44

4.78

5.00

5.21

--

5.64

5.83

Jun

1997

6.05

--

6.06

6.04

5.87

5.84

6.16

6.06

6.23

6.37

6.60

6.78

7.08

7.55

7.87

8.05

8.05

8.23

8.33

8.29

8.33

8.37

8.20

8.10

8.03

7.67

7.26

6.93

6.40

6.06

..

Jul

5.82

5.63

5.73

5.76

5.81

5.94

6.06

6.35

6.35

6.52

6.61

6.84

6.94

7.16

7.14

7.34

7.51

7.64

7.57

7.45

7.39

7.14

7.02

6.90

6.93

6.83

7.12

7.04

7.07

7.00

7.00

Aug

7.22

7.45

7.68

7.55

7.46

7.50

7.71

8.07

8.22

8.04

7.83

8.21

8.00

8.11

8.07

8.14

8.10

7.74

8.03

8.08

8.12

7.99

8.10

8.38

8.52

8.65

8.79

8.91

9.04

9.12

9.18

Sep

9.22

8.95

8.96

9.22

9.39

9.58

9.74

9.83

9.91

10.08

10.15

10.25

10.34

10.30

10.64

10.77

10.93

11.06

11.24

11.11

11.37

11.20

11.35

11.60

11.83

11.99

12.02

12.12

12.15

12.25

Oct

12.06

12.30

12.33

12.30

12.26

12.35

12.27

12.29

11.99

12.19

12.04

12.24

12.28

11.98

12.21

12.08

11.84

11.71

11.56

10.95

10.63

10.47

10.48

10.28

9.92

9.94

9.79

9.73

9.64

9.47

9.29

Nov

9.19

9.00

9.03

8.91

8.55

8.89

8.65

8.67

8.93

8.73

8.79

9.09

9.29

--

--

--

--

--

--

--

10.49

10.42

10.13

10.08

10.19

10.15

10.08

10.03

10.00

9.98

Dec

9.77

9.81

9.73

9.62

9.64

9.78

9.80

9.89

10.04

10.25

10.18

10.45

11.05

11.17

11.48

11.61

11.73

11.74

11.82

11.51

11.81

12.01

12.14

12.20

12.30

12.48

12.67

12.88

13.07

13.19

13.09

96 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10j. Mean daily ground-water levels in observation well CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

13.47

13.62

13.65

13.69

13.87

13.86

13.77

13.83

13.74

13.31

13.24

13.32

13.06

12.90

12.88

12.79

12.71

12.61

12.63

12.69

12.73

12.76

12.88

12.89

12.93

12.83

12.86

12.88

12.87

12.84

12.86

Feb

12.88

12.61

12.40

12.53

12.73

12.71

12.85

12.87

12.92

12.95

13.01

12.99

12.99

12.80

13.04

13.08

13.10

13.15

13.17

13.20

13.09

13.00

12.92

12.75

12.63

12.37

12.13

11.91

-

-

_

Mar

11.60

11.30

11.00

10.62

9.99

9.76

9.77

9.84

9.60

9.32

9.10

9.18

9.61

9.70

9.84

9.81

9.96

10.16

10.23

10.26

10.24

10.32

10.22

10.07

10.43

10.46

10.41

10.34

10.30

10.16

9.89

Apr

9.29

7.97

6.09

3.96

3.00

2.51

2.01

1.79

1.82

1.76

1.84

2.06

2.16

2.35

2.30

2.24

2.19

2.33

2.82

3.01

2.90

2.91

3.30

3.51

3.69

3.85

3.76

3.99

4.48

4.93

_

May

5.22

5.50

5.76

6.04

6.30

6.57

6.83

7.06

7.27

7.44

7.68

7.89

8.04

8.29

8.51

8.44

8.53

8.97

9.17

9.27

9.47

9.65

9.82

9.99

10.15

10.28

10.41

10.49

10.47

10.39

10.32

Jun

1998

10.25

-

9.93

9.72

9.39

8.92

8.79

8.94

9.08

9.05

8.97

8.87

8.50

7.62

5.56

3.93

3.01

2.57

2.33

2.23

2.20

2.16

1.87

1.41

-0.26

-0.68

-0.43

-0.41

-0.21

0.03

_

Jul

0.16

0.10

-0.11

-0.28

-0.08

--

-

6.35

6.35

-

2.37

3.12

3.68

4.14

4.56

4.82

5.30

5.75

6.03

6.32

6.58

6.83

6.94

6.93

7.04

7.34

7.78

7.99

8.13

8.18

8.29

Aug

8.66

8.66

9.18

9.37

9.38

9.68

9.84

9.76

9.81

10.02

9.87

9.81

9.91

10.24

10.32

10.33

10.41

10.11

~

10.06

10.08

10.38

10.53

10.59

10.61

10.51

10.64

10.76

10.79

10.78

10.67

Sep

10.89

10.88

10.83

10.64

10.45

10.37

10.19

9.73

9.48

9.51

9.76

9.94

10.03

10.15

10.13

10.12

10.49

10.89

11.17

11.38

11.52

11.31

11.36

11.53

11.41

11.23

10.93

10.60

10.44

10.16

..

Oct

9.66

9.63

9.69

9.56

9.70

9.65

9.33

9.16

9.17

9.32

9.37

9.25

9.37

9.69

9.90

10.05

10.22

10.16

10.02

10.17

10.06

9.81

10.04

9.74

9.81

9.76

10.02

10.04

10.03

9.76

9.53

Nov

9.55

9.83

9.68

9.54

9.55

9.71

9.90

9.65

9.94

9.99

9.60

9.57

9.75

9.94

9.87

9.88

9.74

9.85

9.81

9.62

9.71

9.98

9.84

9.82

10.13

10.16

10.21

10.30

10.41

10.35

Dec

10.25

10.63

10.72

10.81

10.95

11.02

10.79

10.80

11.16

11.37

11.42

11.29

11.42

11.55

11.52

11.88

11.97

12.18

12.00

12.01

12.02

12.12

12.51

12.47

12.45

12.58

12.72

12.69

12.48

12.32

12.08

TABLES 97
Table 10j. Mean daily ground-water levels in observation well CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

12.11

12.43

12.33

12.01

12.09

12.20

12.14

12.08

11.85

11.82

12.00

11.96

11.63

11.55

11.81

11.78

11.72

11.68

11.65

11.61

11.61

11.60

11.59

11.38

11.36

11.34

11.51

11.19

11.39

11.33

11.16

Feb Mar Apr May Jun Jul

1999

11.44

11.47

11.37

11.02

11.17

11.14

11.16

11.12

10.91

11.01

10.94

10.77

10.70

10.59

10.66

10.48

10.35

10.27

10.08

9.92

9.99

9.92

9.89

9.90

9.81

9.91

9.87

9.73

--

--

, -

Aug Sep Oct Nov Dec

--

-

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

-

-

-

-

--

-

--

-

--

-

--

98 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10k. Mean daily ground-water levels in observation well CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; -, value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

18.58

18.48

18.45

19.24

19.52

19.60

19.68

20.30

20.11

20.41

20.76

20.59

20.73

20.70

20.77

20.60

20.26

20.11

19.70

15.69

11.86

8.47

5.31

17.12 4.10

16.93 5.06

16.92 5.50

17.86 7.23

18.26 8.24

18.69

19.09

18.65

Mar

7.81

7.64

7.14

6.70

6.16

5.74

5.84

6.12

6.84

7.17

7.10

5.99

5.34

4.70

4.14

2.67

2.37

3.49

4.63

4.60

4.12

5.19

5.53

4.97

4.58

4.15

3.07

2.00

3.04

3.97

4.04

Apr

4.15

4.10

4.82

5.26

4.84

5.40

6.28

6.92

6.75

6.14

6.64

6.90

7.51

7.78

7.82

7.75

7.88

8.06

8.31

8.68

9.02

9.41

9.30

9.47

9.55

10.03

10.36

10.46

9.51

8.28

May

8.83

9.48

9.15

7.21

6.11

6.15

6.12

5.92

5.26

5.90

5.58

5.36

5.49

5.77

6.61

7.46

8.04

7.20

6.46

6.79

6.92

7.13

7.54

7.49

8.17

9.19

9.60

9.97

9.94

9.35

9.08

Jun

1997

8.91

8.68

8.26

8.11

7.85

7.85

8.34

9.28

9.61

10.04

10.25

10.32

11.67

11.41

11.54

11.36

11.44

11.08

10.67

10.41

10.10

10.00

9.84

8.37

6.35

5.16

5.48

5.89

6.33

6.30

Jul

6.82

6.72

7.16

7.81

8.33

8.84

9.42

9.68

9.33

9.34

10.34

9.93

9.35

9.37

10.06

10.63

10.42

9.97

8.99

8.64

8.54

8.74

8.81

9.00

9.42

9.98

10.29

9.94

9.40

9.19

9.33

Aug

9.55

10.29

10.36

10.91

10.91

10.97

10.33

10.37

10.15

10.36

10.35

10.29

10.39

9.99

9.69

10.10

10.27

10.26

10.33

10.42

11.35

10.96

10.98

10.96

11.49

12.11

12.41

11.50

11.48

11.30

10.82

Sep

10.78

11.47

11.91

12.11

12.24

12.37

12.54

12.62

12.70

13.27

13.58

13.79

13.98

14.18

14.18

14.01

14.21

14.13

14.14

14.11

14.16

14.51

14.39

14.61

14.63

14.61

14.47

14.48

14.21

14.61

Oct

14.62

14.29

14.12

14.40

14.36

14.48

14.56

14.40

14.40

14.2?

14.49

14.26

14.36

14.14

14.31

13.40

11.93

11.42

11.20

10.74

10.68

10.90

10.74

10.98

11.32

11.31

11.16

10.59

10.59

10.26

9.85

Nov

9.89

9.68

10.23

10.90

10.98

10.59

10.99

11.81

12.19

13.14

13.64

13.92

13.72

13.91

14.28

14.48

--

--

--

--

11.65

11.22

11.15

11.29

11.62

11.96

11.82

11.41

10.94

10.99

Dec

11.26

11.19

11.10

12.39

13.58

14.18

13.82

14.38

14.86

15.16

15.53

15.58

15.75

15.91

15.57

15.38

15.33

15.41

15.64

15.48

15.69

15.68

16.07

15.76

16.08

16.40

16.69

16.49

16.65

16.73

17.03

TABLES 99
Table 10k. Mean daily ground-water levels in observation well CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

17.24

17.35

17.19

16.54

16.11

16.15

15.96

15.69

15.64

15.66

15.39

15.11

14.74

14.66

14.72

15.46

15.87

16.42

16.49

16.40

16.55

16.88

16.61

16.27

15.81

15.99

15.69

15.50

15.39

15.46

15.32

Feb

15.37

15.46

15.29

15.46

15.63

15.64

15.58

15.67

15.65

15.57

15.64

15.66

15.68

15.94

15.87

15.82

16.26

16.95

16.93

15.99

16.01

15.44

14.53

14.17

13.70

13.38

12.94

12.34

--

--

_.

Mar

11.83

11.48

11.28

11.58

11.30

11.56

11.68

11.64

11.75

11.94

12.22

12.80

12.96

13.15

13.49

13.71

13.82

13.83

14.01

14.13

14.11

14.08

14.01

13.62

13.16

12.74

12.50

12.33

12.13

11.60

7.03

Apr

3.96

2.25

1.97

2.16

2.52

2.38

2.46

2.96

3.47

3.87

3.76

3.74

3.91

4.07

4.19

4.15

4.99

5.22

5.13

4.81

5.24

5.34

5.42

5.45

5.81

6.15

6.47

6.99

7.70

7.95

May

8.55

9.03

9.53

9.96

10.40

10.91

11.47

11.74

12.28

12.70

12.84

13.14

13.53

13.56

13.49

13.77

13.88

13.97

13.95

14.23

14.24

14.15

14.31

14.31

14.26

13.84

12.99

12.27

11.89

11.50

11.16

Jun

1998

10.48

10.16

10.21

10.11

10.26

9.97

9.80

9.87

9.64

9.50

8.85

6.36

4.76

3.56

2.13

2.50

3.06

3.41

3.31

3.65

4.28

3.21

1.98

1.34

0.22

0.02

0.38

0.36

0.82

1.46

Jul

2.04

1.58

0.89

1.17

2.36

3.62

4.42

5.22

4.93

5.64

6.37

6.80

7.11

7.52

8.04

8.59

8.53

8.23

8.40

8.65

8.85

9.27

9.52

9.48

9.55

9.94

10.48

10.95

11.67

11.99

11.89

Aug

12.11

12.18

12.59

12.79

12.71

12.70

12.50

12.29

12.24

12.31

12.09

12.02

12.23

12.29

12.28

12.26

12.37

12.42

12.32

12.35

12.40

12.39

12.64

12.82

12.98

13.31

13.01

12.76

12.85

13.00

12.99

Sep

12.63

11.82

10.99

10.81

10.75

10.46

10.50

10.61

10.72

10.98

11.19

11.09

11.54

12.02

12.57

12.82

13.18

13.24

13.21

13.35

13.65

13.19

11.60

10.64

10.19

10.04

9.98

10.47

10.69

10.95

Oct

11.06

11.25

11.33

11.32

11.24

11.28

11.47

11.55

12.05

12.28

12.47

12.50

12.83

12.94

12.52

12.51

12.26

12.06

11.41

10.84

10.28

10.26

10.30

10.20

10.38

10.42

10.52

10.43

10.21

10.70

10.70

Nov

10.72

10.97

10.94

10.90

11.10

11.10

11.04

11.00

10.46

10.48

10.56

10.45

10.35

10.24

10.27

10.11

10.47

10.41

10.67

10.88

11.01

11.05

11.32

11.23

11.03

11.09

11.29

11.39

11.72

11.81

Dec

11.90

11.97

12.06

11.94

12.02

11.99

12.28

12.28

12.42

12.61

12.55

12.48

12.53

12.57

12.63

13.57

13.98

13.97

14.02

13.49

13.29

13.26

13.10

13.14

13.05

12.87

12.62

12.45

12.31

12.48

12.44

100 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10k. Mean daily ground-water levels in observation well CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

12.39

12.14

12.29

12.38

12.34

12.45

12.63

12.57

12.47

12.46

12.43

12.54

12.79

12.68

12.53

12.58

12.55

12.46

12.50

13.07

12.80

12.56

12.42

12.70

12.85

12.57

12.42

12.46

12.71

12.63

12.30

Feb Mar Apr May Jun Jul

1999

12.22

11.81

12.28

12.25

12.20

12.53

11.82

11.62

12.19

12.54

12.84

12.72

12.95

12.45

12.22

12.57

12.53

12.55

12.76

12.12

12.03

11.72

11.63

11.67

11.79

11.48

11.29

11.07

--

-

--

Aug Sep Oct Nov Dec

--

--

--

--

--

--

--

--

--

--

--

..

--

-

--

--

-

--

--

--

--

--

--

--

--

--

--

--

-

TABLES 101
Table 101. Mean daily ground-water levels in observation well CRM-17 (map ID #14), Seminole Well Field, Cedar Rapids, 

Iowa, November 1997 through September 1998.

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

1997

11.80

11.66

11.87

12.95

13.75

14.37

13.94

14.46

15.19

15.30

15.57

15.51

15.61

15.74

15.44

15.31

15.26

15.33

15.56

15.43

12.12 15.71

11.71 15.56

11.67 15.97

11.50 16.22

12.37 16.13

12.64 16.24

12.73 16.64

12.12 17.15

11.66 17.28

11.66 17.09

16.64

102 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10l. Mean daily ground-water levels in observation well CRM-17 (map ID #14), Seminole Well Field, Cedar Rapids, 

Iowa, November 1997 through September 1998-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

16.93

17.27

17.09

16.45

16.11

16.06

15.86

16.03

15.87

15.91

15.65

15.30

13.15

14.89

14.92

15.54

15.85

16.20

16.20

16.28

16.40

16.61

16.52

16.15

15.76

15.79

15.66

15.73

15.42

15.50

15.37

Feb

15.71

15.66

15.28

15.69

15.44

15.57

15.62

15.64

15.62

15.48

15.92

15.57

15.55

15.88

15.81

15.94

16.30

16.96

16.63

15.85

15.83

15.30

14.50

14.14

13.98

13.35

13.01

12.96

--

--

--

Mar

12.25

11.71

11.60

11.88

12.00

12.25

12.12

12.35

11.79

7.53

8.79

9.22

13.18

10.94

10.21

11.76

13.97

14.02

14.15

14.10

14.08

14.04

14.23

14.01

13.54

13.41

13.13

12.76

12.86

12.21

6.82

Apr

4.44

2.72

2.48

2.96

3.15

3.17

2.73

3.38

4.41

4.51

4.42

4.72

4.89

5.04

5.19

5.07

5.63

5.94

5.66

5.46

5.86

6.14

5.92

6.00

6.63

6.83

6.39

6.91

7.96

8.45

--

May

9.48

10.05

10.24

10.71

11.23

11.76

12.56

12.38

12.81

13.14

13.35

13.82

13.80

13.91

14.00

14.33

14.36

14.23

14.31

14.48

14.49

14.43

14.59

14.62

14.62

14.22

13.44

12.81

12.51

12.23

11.92

Jun

1998

11.40

11.03

10.86

10.82

10.81

10.86

10.64

10.64

10.26

10.18

9.75

7.28

5.52

4.07

2.83

3.38

3.62

4.33

4.12

4.47

4.91

3.58

2.56

2.12

0.99

0.82

1.31

1.11

1.73

2.23

--

Jul

2.56

2.25

1.55

1.93

3.14

4.22

5.07

5.83

5.40

6.12

6.99

7.22

7.54

7.92

8.34

9.03

8.97

8.77

8.93

9.27

9.53

9.86

10.14

10.57

10.39

10.71

11.11

11.73

12.21

12.58

11.73

Aug

11.07

12.83

13.06

13.28

13.61

13.52

13.14

13.13

13.06

12.88

13.11

12.62

13.10

12.97

13.11

13.06

13.20

13.51

13.26

13.15

13.13

13.20

13.50

13.83

13.74

13.88

13.67

13.56

13.58

13.54

13.77

Sep Oct

13.29

12.69

12.25

11.63

11.55

11.37

11.39

11.66

11.77

12.02

11.93

11.94

12.29

12.88

13.20

13.56

13.56

13.41

13.62

13.65

13.77

13.67

11.92

11.04

10.57

10.55

10.18

--

--

--

-

Nov Dec

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 103
Table 10m. Mean daily ground-water levels in observation well CRM-18 (map ID #15), Seminole Well Field, Cedar 

Rapids, Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; , value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

17.02

15.52

16.52

16.47

16.14

17.18

18.10

16.63

17.50

15.96

15.77

17.33

17.81

17.32

16.77

17.16

17.52

18.44

15.20

13.62

9.93

2.18

2.63

15.17 3.11

14.03 2.70

13.82 5.27

14.09 5.96

16.50 5.66

16.02

15.89

18.50

Mar

5.93

3.44

4.37

3.10

0.27

2.57

0.93

-0.55

1.06

2.38

0.97

0.80

0.31

-0.68

-1.59

-2.25

-2.35

-1.92

1.49

3.63

4.49

2.55

0.74

2.00

2.02

1.04

2.14

3.54

2.43

1.61

0.72

Apr

-0.17

1.28

2.12

4.95

8.55

7.37

2.52

4.87

4.19

3.84

5.32

5.47

6.12

6.17

6.31

5.84

6.27

6.68

6.34

6.52

6.85

6.95

4.59

4.97

5.15

7.72

8.20

7.07

5.19

8.63

__

May

5.09

8.18

6.51

2.71

1.64

1.63

3.38

4.18

3.97

4.21

3.77

4.13

4.72

5.57

5.66

5.84

6.04

6.00

4.17

5.98

6.42

6.55

6.82

6.36

6.71

7.27

7.18

7.41

-

7.33

7.40

Jun

1997

7.72

6.35

4.91

4.70

4.35

4.22

5.07

4.75

5.05

5.21

5.49

5.64

5.90

6.59

8.92

6.80

6.40

7.93

7.45

8.07

6.42

6.82

7.13

6.17

4.90

2.62

3.08

4.37

4.56

4.38

Jul

4.94

3.87

5.25

5.87

6.12

6.60

6.88

7.57

7.09

7.11

7.25

7.52

7.16

7.48

7.44

7.51

7.30

7.04

6.61

6.62

6.86

6.65

6.72

6.64

7.04

6.99

7.67

7.19

7.21

6.76

6.64

Aug

6.71

6.98

7.44

7.33

7.59

7.71

7.64

7.75

8.24

7.70

7.62

7.88

7.62

8.07

8.25

8.11

7.96

7.70

8.02

8.19

8.25

8.06

8.17

8.42

8.39

8.65

8.67

8.35

7.72

6.58

6.20

Sep

6.07

6.28

6.21

6.18

6.64

6.89

6.92

6.97

6.91

7.13

7.25

7.32

7.34

7.31

7.53

7.58

7.57

7.42

7.43

7.17

7.24

7.44

7.46

7.68

7.79

7.76

7.68

7.87

8.20

7.89

Oct

7.65

7.77

7.90

8.00

7.99

7.99

7.94

8.02

7.82

7.66

7.99

8.23

8.21

7.64

7.42

7.09

6.71

6.64

6.87

6.45

6.50

6.77

6.82

7.15

7.18

7.35

6.90

6.80

6.78

6.73

6.99

Nov

6.99

7.18

6.95

6.92

6.82

6.67

6.91

7.26

7.37

7.47

7.64

8.00

8.10

-

-

-

-

-

-

~

7.32

7.08

6.81

6.95

7.39

7.53

7.56

7.22

6.98

7.25

Dec

7.17

7.26

7.40

7.85

8.49

8.95

8.76

9.08

9.30

9.36

9.16

9.22

9.62

9.56

9.48

9.43

9.48

9.55

9.59

9.24

9.52

9.93

10.04

10.06

10.01

10.29

10.42

10.55

10.45

10.54

104 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10m. Mean daily ground-water levels in observation well CRM-18 (map ID #15), Seminole Well Field, Cedar 

Rapids, Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-

10.65

10.49

10.26

10.29

10.12

10.00

10.11

10.14

9.68

9.49

9.57

8.97

9.17

9.39

9.46

9.68

9.72

9.80

10.07

10.27

10.38

10.54

10.42

10.38

10.24

10.14

9.98

10.00

9.99

9.95

Feb

9.96

9.80

9.58

9.75

9.96

9.99

10.16

10.20

10.27

10.24

10.24

10.17

10.31

10.24

10.56

10.56

10.81

10.70

10.64

10.32

9.73

8.97

8.24

7.67

7.52

7.40

6.94

6.24

-

-

_

Mar

5.94

5.79

5.70

5.84

5.51

5.69

5.90

6.05

5.97

5.85

6.25

6.35

6.64

6.67

6.82

6.95

7.39

7.49

7.42

7.22

7.05

6.99

6.95

6.64

6.62

6.32

6.23

6.10

5.92

5.80

1.74

Apr

0.16

-0.91

-1.08

-1.16

-0.73

-0.35

0.39

0.83

0.95

0.98

1.03

1.29

1.50

0.88

6.05

3.48

0.55

0.62

0.56

0.33

0.12

0.29

1.44

2.67

6.30

6.02

4.31

4.84

5.10

5.54

May

6.74

6.70

6.34

6.62

6.87

7.41

9.91

7.82

8.23

8.36

8.44

9.16

8.78

8.89

9.07

8.98

9.07

8.88

9.00

9.03

9.09

8.91

8.96

8.99

8.95

8.42

7.50

6.88

6.64

8.70

7.60

Jun

1998

7.42

6.84

-

4.34

4.16

3.96

4.09

3.96

3.66

3.36

7.23

2.68

-0.28

7.84

5.77

0.57

-0.27

0.70

-0.01

-0.03

-0.38

-1.36

-

-

4.91

2.63

3.08

4.38

4.58

4.40

Jul

4.96

3.88

5.27

5.87

6.12

6.61

6.89

7.59

7.09

7.11

7.25

7.53

7.17

7.50

7.44

7.51

-

4.36

4.32

4.63

4.88

-

5.12

5.41

5.76

5.67

5.89

6.02

6.24

6.25

6.67

Aug

6.68

6.70

6.81

6.81

6.98

6.53

6.20

6.25

6.22

5.94

6.16

6.63

6.52

6.56

6.68

6.59

6.77

6.67

6.98

-

6.95

7.11

8.22

8.84

8.51

8.23

8.08

8.11

8.07

7.99

7.91

Sep

6.85

5.82

6.25

5.58

5.59

5.66

5.78

5.70

5.97

5.97

6.05

6.22

6.18

6.49

6.41

6.72

6.64

6.77

6.83

6.72

7.04

7.04

6.43

5.96

5.56

5.70

5.53

5.50

5.63

5.71

Oct

6.02

5.80

5.89

5.87

5.43

5.51

5.58

6.99

7.72

7.65

7.97

8.41

8.45

7.82

7.02

6.77

6.94

5.57

5.37

4.69

4.25

3.51

4.40

4.75

4.56

4.72

4.77

4.84

4.59

5.08

5.30

Nov

5.02

4.79

4.99

5.57

5.71

5.70

5.47

5.63

6.87

16.93

4.97

4.93

4.46

4.96

4.64

6.36

4.51

5.41

4.98

5.17

5.63

5.74

6.08

5.83

5.47

5.54

5.72

5.92

8.93

7.01

Dec

6.44

6.34

6.29

5.92

7.22

6.15

6.27

6.48

6.49

5.98

6.56

6.63

6.76

6.84

7.45

8.98

9.39

13.16

9.26

7.58

7.35

5.96

6.55

6.54

6.88

6.35

6.35

6.75

7.24

6.39

TABLES 105
Table 10m. Mean daily ground-water levels in observation well CRM-18 (map ID #15), Seminole Well Field, Cedar 

Rapids, Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

--

6.98

6.60

6.77

6.70

6.62

6.69

6.65

6.92

6.91

8.25

6.78

6.99

6.88

8.22

7.57

11.76

10.64

8.02

9.03

9.14

10.28

8.42

6.70

6.58

6.76

7.25

6.74

6.23

6.02

6.60

Feb Mar Apr May Jun Jul

1999

6.36

7.12

14.83

8.46

8.26

8.28

6.16

5.95

7.42

10.07

14.37

8.76

8.35

8.72

8.73

8.66

8.89

8.95

8.79

8.89

8.20

8.78

8.89

9.06

9.00

9.34

12.76

10.60

-

-

-

Aug Sep Oct Nov Dec

..

--

--

--

--

--

..

-

--

--

--

--

--

--

--

-

--

--

--

--

--

..

--

--

--

--

--

-

--

106 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10n. Mean daily ground-water levels in observation well CRM-19 (map ID #16), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Water levels measured as feet below land surface; , value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

19.87

19.80

19.65

19.62

19.39

19.60

19.88

19.56

20.12

20.55

20.70

20.90

21.17

21.34

21.56

21.13

21.60

21.65

18.84

15.77

11.25

6.10

3.97

16.73 3.64

16.51 4.86

17.12 6.24

17.63 7.02

17.76 7.51

18.41

19.32

19.52

Mar

7.28

6.39

6.12

5.29

4.28

4.52

3.35

2.75

3.56

4.38

4.02

3.19

2.26

1.32

-0.01

-0.33

-0.40

0.37

3.29

5.43

5.08

4.84

4.75

4.27

3.78

3.27

3.00

1.79

3.62

4.07

4.38

Apr

4.18

4.63

5.26

6.23

6.59

6.77

5.33

6.14

5.60

5.12

6.27

7.13

7.06

7.11

7.02

6.92

7.36

7.86

8.20

8.37

8.43

8.67

6.05

5.72

6.26

8.88

9.34

8.66

6.28

6.15

..

May

6.30

8.12

7.12

3.40

2.96

2.56

4.79

5.51

5.31

5.43

5.82

5.96

6.12

6.60

6.76

7.03

7.68

5.79

5.08

7.31

7.54

7.80

7.92

8.26

8.49

8.31

8.38

8.22

~

7.93

8.02

Jun

1997

8.42

6.86

5.28

5.28

5.70

5.76

5.66

5.44

5.80

5.81

6.01

6.16

6.33

6.56

8.65

6.50

7.35

8.93

8.44

9.02

7.23

6.94

7.21

6.65

5.31

3.52

3.84

5.06

5.80

5.76

..

Jul

6.10

5.14

6.48

6.51

6.81

7.31

7.76

8.29

8.06

8.19

8.21

8.22

8.34

8.31

9.53

7.95

7.75

7.47

7.07

7.30

7.51

7.49

7.57

7.57

8.19

8.60

8.45

8.09

8.36

7.45

7.40

Aug

7.60

7.80

8.07

8.26

8.74

8.85

8.86

8.64

8.91

8.70

8.80

8.63

8.67

8.91

8.85

9.07

8.85

8.91

8.84

9.14

8.86

8.90

9.03

9.24

8.97

9.30

9.16

9.12

8.35

7.20

7.16

Sep

6.99

7.07

6.81

6.91

7.14

7.45

7.31

7.43

7.43

7.37

-

-

-

--

-

-

8.22

8.08

8.06

7.94

7.95

8.17

8.37

8.31

8.62

8.23

8.35

8.47

8.53

8.52

_.

Oct

8.21

8.54

8.55

8.75

8.81

8.34

8.30

8.64

8.67

8.47

8.79

8.92

8.78

8.64

7.94

7.51

7.68

7.40

7.63

7.82

7.92

7.94

7.96

8.31

8.06

8.37

7.69

7.89

7.67

7.94

7.80

Nov

7.78

7.86

8.00

7.82

8.19

7.98

8.28

8.19

8.08

8.45

8.59

8.85

9.09

-

--

-

-

-

--

-

8.32

8.05

7.78

8.07

8.44

8.32

8.51

8.34

8.14

8.34

Dec

7.94

7.95

8.57

8.92

9.20

9.29

9.08

9.74

9.87

9.81

9.64

9.72

9.70

9.52

9.64

9.82

9.77

10.02

9.74

9.94

9.77

10.24

9.94

10.28

10.43

10.64

10.49

10.29

10.25

10.41

TABLES 107
Table 10n. Mean daily ground-water levels in observation well CRM-19 (map ID #16), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-

10.84

10.32

10.03

10.16

9.72

9.84

10.26

10.26

9.63

9.57

9.59

9.24

9.37

9.54

9.79

9.83

9.44

9.47

9.81

10.09

10.02

10.38

10.02

10.36

9.88

9.92

10.04

10.01

9.74

10.02

Feb

9.96

9.79

10.01

9.77

9.64

9.71

9.83

9.90

10.08

10.38

10.20

9.97

10.33

10.24

10.53

10.74

10.60

10.64

10.68

9.98

8.67

7.96

--

-

4.29

5.68

6.42

6.76

-

-

Mar

6.47

5.63

5.25

4.45

3.09

3.99

2.39

1.76

2.72

3.45

2.99

2.45

1.38

0.44

-0.29

-0.89

-1.06

-0.29

2.71

4.51

4.62

-

-

5.98

5.87

5.70

5.34

5.21

5.09

4.77

1.24

Apr

-0.10

-0.99

-1.25

-0.90

-0.68

-0.17

0.08

0.65

1.24

1.08

1.20

1.58

1.53

2.18

2.19

2.70

1.88

1.90

1.60

1.54

1.26

1.49

2.83

4.85

5.05

5.37

5.84

6.20

6.39

7.16

May

7.41

7.69

8.08

8.24

8.37

8.60

8.62

8.95

8.66

8.74

9.22

9.42

9.07

9.26

9.69

9.54

9.61

9.67

9.65

9.51

9.79

10.20

10.34

10.19

9.52

9.03

8.42

8.19

7.61

7.52

7.40

Jun

1998

7.35

6.38

-

5.55

5.30

5.35

5.51

5.41

5.57

4.71

4.02

2.49

1.51

0.38

-0.37

0.58

1.38

1.93

1.67

1.54

1.04

-0.29

~

-

4.66

2.53

3.06

4.32

4.75

4.68

Jul

5.27

4.39

5.45

5.79

6.08

6.69

6.84

7.48

6.96

6.91

7.16

7.47

7.38

7.46

-

7.35

6.92

6.60

6.53

6.73

6.98

6.88

6.97

6.88

7.31

7.48

7.57

7.13

8.07

7.09

6.75

Aug Sep

6.52

7.05

7.51

7.33

7.87

7.56

7.79

7.78

8.15

7.75

7.52

8.06

7.71

-

-

~

-

-

-

-

-

-

-

..

-

--

--

-

-

-

_.

Oct Nov Dec

-

..

-

-

~

-

-

--

..

-

-

--

-

-

~

-

..

-

-

-

-

-

-

--

-

-

-

-

-

-

108 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10n. Mean daily ground-water levels in observation well CRM-19 (map ID #16), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

6.68

6.84

6.79

6.78

6.43

6.84

6.74

6.64

6.85

6.79

6.81

7.10

6.96

6.86

6.83

6.89

6.20

6.26

8.03

9.36

8.06

6.71

6.79

6.55

6.48

6.74

6.69

6.61

6.20

6.02

6.45

Feb Mar Apr May Jun Jul

1999

6.49

6.51

5.93

8.57

8.51

8.25

6.40

5.97

7.35

8.57

7.74

8.29

8.03

8.34

8.67

8.48

8.35

8.36

8.39

8.61

8.13

8.64

8.64

8.82

8.92

9.17

8.88

9.21

--

-

--

Aug Sep Oct Nov Dec

--

--

--

--

--

..

-

--

--

--

--

--

--

..

--

..

-

-

--

--

--

--

-

--

--

--

--

..

TABLES 109
Table 10o. Mean daily ground-water levels in observation well CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb Mar

2.60

3.15

3.56

3.57

3.73

3.70

3.84

6.78

4.17

4.10

3.81

2.99

1.68

2.79

2.34

2.15

2.07

2.39

1.88 2.34

2.94 2.58

4.22 2.27

3.89 2.14

2.81 2.09

2.37 2.68

4.09 4.00

10.69 5.33

9.82 7.80

4.28 7.17

5.37

8.82

9.78

Apr May

4.75

--

-

--

1.48

1.86

4.44

1.23

1.49

1.43

1.62

3.74

2.35

2.57

3.18

2.64

2.63

2.49

2.66

2.76

2.66

1.80

1.69

1.51

1.90

1.50

1.00

0.87

1.57

3.66

2.79

Jun Jul

1998

2.94

3.84

1.68

1.03

1.14

1.19

1.30

1.31

1.11

0.95

5.67

2.62

-0.80

5.98

4.53

0.18

-1.48

0.56

-0.08

-0.51

-1.72

-2.75

~

..

~

..

~

-

-

-

Aug

--

--

~

~

~

-

-

~

~

-

--

~

3.17

2.97

3.33

3.17

2.86

2.98

3.08

3.08

3.20

3.19

3.44

4.23

3.12

3.01

3.12

3.36

3.36

2.98

2.98

Sep

2.99

3.30

4.45

2.32

2.56

2.39

2.62

3.11

3.36

3.44

3.60

3.49

3.10

3.93

3.06

3.34

3.39

3.32

3.17

3.14

3.49

3.62

3.99

3.78

3.83

4.51

3.59

3.58

3.17

3.04

__

Oct

3.76

3.61

3.53

3.33

3.32

3.15

2.34

3.45

3.46

3.38

2.79

2.76

3.15

3.42

3.39

3.31

3.30

1.97

1.50

1.49

1.74

2.33

2.72

2.78

2.66

2.79

2.54

2.20

1.27

1.34

1.58

Nov

1.62

2.22

2.52

2.97

2.96

3.10

3.30

2.41

4.21

10.07

1.94

3.07

2.94

3.83

3.59

5.02

3.14

4.00

2.98

3.10

3.54

3.46

3.71

3.63

3.73

3.86

3.83

3.68

7.02

4.53

..

Dec

4.14

4.24

~

~

6.08

3.86

2.29

2.29

2.33

2.20

2.62

3.64

3.86

4.00

4.00

4.01

4.05

8.05

4.23

4.31

3.85

3.23

3.88

3.95

3.75

3.55

4.00

4.65

5.04

3.99

4.27

110 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10o. Mean daily ground-water levels in observation well CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

4.32

5.24

4.53

4.33

4.22

4.24

4.35

4.26

4.49

4.44

6.53

4.82

4.54

4.43

6.31

5.55

9.50

8.34

4.69

4.49

6.66

8.70

6.86

4.39

4.54

4.64

5.52

4.54

4.56

4.54

4.56

Feb Mar Apr May Jun Jul

1999

4.64

6.19

11.81

4.26

4.31

4.10

4.68

4.83

3.92

5.54

8.92

3.65

3.58

3.59

4.29

3.59

3.83

3.88

3.72

3.89

3.89

3.98

4.14

4.28

4.19

5.09

8.94

6.73

--

--

--

Aug Sep Oct Nov Dec

--

..

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

TABLES 111
Table 10p. Mean daily ground-water levels in observation well CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999

[Water levels measures as feet below land surface; --, value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr

1.61 -2.05

3.25

3.63

3.56

3.74

3.72

3.83

4.39

4.13

4.03

3.74

3.19

1.49

1.60

0.99

0.80

1.04

1.25

1.15

1.78

3.82 1.66

3.82 1.41

2.91 1.37

1.82 2.27

1.98 3.18

1.93 3.50

1.81 3.26

1.88 2.56

1.11

1.11

-1.33

May

~

~

-

~

-0.51

-0.38

-0.01

-0.31

-0.28

-0.20

0.01

1.86

1.74

1.90

2.21

2.25

2.35

-

~

-

-

-

-

-

-

-

-

-

~

~

0.15

Jun Jul

1998

0.24

0.62

0.22

-0.74

-0.51

-0.34

-0.24

-0.20

-0.27

-0.56

0.10

-0.66

-1.87

-2.73

-3.33

-2.47

-2.16

-1.36

-1.53

-2.54

-3.51

-4.46

--

..

-

--

-

-

--

Aug Sep Oct

2.75

-

-

-

-

--

~

-

-

-

-

~

-

..

--

~

2.71

2.75

2.73

2.60

2.94

3.16

2.86

2.95

2.90

2.73

2.82

2.95

2.96

Nov

-

--

--

-

~

-

-

~

-

-

-

-

2.46

2.81

2.70

2.88

2.74

2.96

2.82

2.94

2.95

3.19

3.23

3.21

3.49

3.40

3.50

3.38

3.87

3.65

Dec

3.52

3.79

4.06

3.91

4.35

3.09

1.35

1.21

1.06

0.89

1.45

3.11

3.35

3.51

3.66

3.76

3.85

4.19

3.94

3.97

3.72

3.10

3.57

3.69

3.66

3.58

3.69

3.77

3.87

3.87

4.08

112 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10p. Mean daily ground-water levels in observation well CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

4.10

4.31

4.21

4.13

4.12

4.15

4.07

4.30

4.41

4.41

4.69

4.57

4.47

4.45

4.59

4.55

4.63

4.57

4.37

4.44

4.87

4.85

4.76

4.43

4.40

4.49

4.65

4.53

4.43

4.43

4.53

Feb Mar Apr May Jun Jul

1999

4.56

4.82

4.55

4.21

4.23

4.13

4.40

4.38

4.01

4.01

3.68

3.60

3.49

3.69

3.94

3.70

3.68

3.70

3.84

3.86

3.84

3.98

4.H

4.17

4.32

4.62

4.92

4.88

--

--

Aug Sep Oct Nov Dec

..

..

-

--

--

--

--

..

--

-

--

..

..

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 113
Table 10q. Mean daily ground-water levels in observation well CRM-24 (map ID #21), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar

1.36

1.43

3.81

4.30

4.39

4.31

4.15

4.14

4.93

4.75

4.44

4.14

3.24

2.49

2.91

1.69

0.77

1.10

1.63

1.39

2.03

4.52 1.67

4.48 1.43

3.23 1.47

1.59 2.50

2.45 3.63

2.64 4.11

1.69 4.10

3.21

2.13

3.61

Apr May

0.92

-0.99

..

--

-0.02

0.03

0.33

0.37

0.43

0.36

0.79

2.82

3.02

3.28

3.35

3.40

3.44

3.47

3.62

3.57

3.74

1.97

1.08

0.93

0.99

0.79

0.54

0.93

2.40

2.12

1.82

Jun Jul

1998

2.00

2.47

1.99

0.32

0.25

0.37

0.52

0.48

0.46

0.13

1.77

0.48

-0.47

-0.20

-1.94

-1.69

-0.47

-0.21

-0.43

-1.97

-2.69

-3.82

-

~

~

--

~

-

~

..

..

Aug

-

-

~

-

~

~

~

-

-

-

3.11

3.35

3.24

3.31

3.48

3.41

3.24

2.87

3.33

3.36

3.28

3.25

3.17

3.12

3.48

3.28

3.41

3.52

3.49

3.39

3.35

Sep

3.24

3.35

3.44

3.44

1.31

1.41

1.41

1.79

3.49

3.42

3.52

3.76

3.55

3.17

3.26

3.33

3.20

3.35

3.05

1.44

2.85

3.76

3.92

4.12

3.99

3.88

4.03

3.67

3.86

3.80

Oct

3.85

3.64

3.65

3.57

3.22

3.69

3.61

1.78

3.51

3.51

3.60

2.49

1.90

2.92

3.56

3.61

3.20

2.62

2.41

1.45

1.28

1.26

2.11

2.54

2.51

2.70

2.63

1.87

0.77

0.40

0.57

Nov

0.39

0.25

2.24

3.02

3.16

3.40

3.41

3.22

1.03

2.63

0.70

1.54

3.08

3.10

3.11

3.49

3.30

3.19

3.56

3.85

3.52

3.62

3.90

4.07

3.74

4.11

4.28

3.70

3.89

4.38

Dec

4.63

-

~

-

4.41

2.91

1.16

1.17

1.10

0.76

1.82

3.96

4.21

4.38

4.41

4.30

4.39

4.91

4.66

4.78

4.39

3.41

4.19

4.25

4.25

4.07

4.14

4.23

4.51

4.49

4.83

114 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10q. Mean daily ground-water levels in observation well CRM-24 (map ID #21), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

4.92

4.80

4.82

4.95

5.01

4.94

5.00

4.99

5.37

5.42

5.44

5.27

5.46

5.33

5.48

5.43

5.93

5.89

5.61

5.57

5.51

5.70

5.57

5.37

5.45

5.57

5.62

5.63

5.43

5.38

5.66

Feb Mar Apr May Jun Jul

1999

5.59

5.48

6.36

5.37

5.16

5.27

5.14

5.14

5.01

5.01

5.17

4.88

4.62

4.98

4.88

4.99

5.08

5.09

4.84

5.11

4.88

5.18

5.29

5.44

5.44

5.75

6.07

5.90

..

--

--

Aug Sep Oct Nov Dec

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

..

--

TABLES 115
Table 10r. Mean daily ground-water levels in observation well CRM-25 (map ID #22), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999

[Water levels measured as feet below land surface; --, value not measured or recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

-

-

-

-

..

-

-

..

..

..

--

..

..

5.36

5.47

5.51

5.37

5.57

5.50

5.65

5.82

5.96

6.07

6.15

6.18

5.69

5.70

6.05

..

_

Mar

5.85

5.71

5.72

5.79

5.79

5.83

5.89

6.01

5.96

6.01

5.85

5.86

4.77

4.28

4.41

4.54

4.61

4.70

4.82

4.95

5.06

5.19

5.22

5.21

5.36

5.47

5.24

4.52

4.09

3.36

0.89

Apr

0.35

-0.18

-0.39

-0.18

0.11

0.35

0.08

0.76

1.73

1.87

1.87

1.89

1.77

2.13

1.97

2.05

2.08

2.07

1.98

1.75

1.61

1.72

1.82

1.85

1.98

2.11

2.32

2.43

2.53

2.68

..

May

2.93

2.99

2.98

3.12

3.26

3.31

3.47

3.49

3.65

3.74

3.81

3.98

4.07

4.21

4.29

4.36

4.43

4.46

4.46

4.43

4.43

4.39

4.44

4.40

4.47

4.52

4.50

4.23

3.81

3.20

3.03

Jun

1998

3.04

3.16

3.31

3.44

3.56

3.66

3.78

3.87

3.76

3.75

2.87

2.36

1.56

0.15

-0.38

0.46

1.12

1.51

1.41

1.24

0.88

0.08

-0.61

-0.97

-1.85

-2.01

-1.69

-1.65

-1.34

-0.89

..

Jul

-0.64

-1.05

-1.44

-1.35

-0.39

0.70

1.32

1.69

1.87

2.04

2.21

2.35

2.44

2.53

2.66

2.81

3.10

3.40

3.55

3.73

3.87

3.97

4.04

4.14

4.25

4.35

4.46

4.45

4.43

4.41

4.51

Aug

4.61

4.66

4.74

4.75

4.71

4.50

4.28

4.44

4.53

4.59

4.67

4.76

4.79

4.85

4.90

4.95

4.75

4.65

4.76

4.83

4.83

4.85

4.96

5.10

5.06

4.99

4.95

4.71

4.68

4.71

4.72

Sep

4.76

4.81

5.00

5.00

5.06

5.12

5.16

5.14

5.18

5.25

5.37

5.48

5.53

5.38

5.20

5.24

5.31

5.40

5.47

5.48

5.50

5.47

5.49

5.51

5.49

5.57

5.54

5.50

5.43

5.40

Oct

5.36

5.35

5.35

5.30

4.89

4.85

4.92

4.96

4.89

4.93

5.02

5.09

5.12

5.17

5.04

5.11

4.98

4.60

4.03

3.28

3.01

3.08

3.26

3.48

3.74

3.97

4.11

4.25

4.25

4.18

4.12

Nov

4.11

4.04

4.05

4.18

4.25

4.37

4.47

4.53

4.46

3.58

4.28

4.18

4.13

4.27

4.24

4.26

4.26

4.31

4.32

4.30

4.34

4.38

4.45

4.48

4.59

4.71

4.79

4.84

5.04

5.05

Dec

5.04

5.17

5.25

5.29

5.49

5.42

5.24

5.11

5.10

5.01

4.90

4.89

5.02

5.16

5.26

5.39

5.47

5.54

5.65

5.71

5.73

5.49

5.53

5.60

5.69

5.69

5.78

5.81

5.81

5.81

5.85

116 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 10r. Mean daily ground-water levels in observation well CRM-25 (map ID #22), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

5.93

6.06

6.04

6.05

6.07

6.15

6.11

6.07

6.06

6.07

6.11

6.08

6.08

6.03

6.08

6.09

5.86

5.91

6.10

6.06

6.11

6.08

6.05

5.95

5.95

5.93

6.01

5.96

5.99

6.00

5.97

Feb Mar Apr May Jim Jul

1999

5.97

5.96

5.52

5.73

5.71

5.73

5.70

5.72

5.65

5.67

5.19

5.05

4.97

4.97

5.03

5.02

5.08

5.12

5.10

5.12

5.14

5.16

5.24

5.30

5.33

5.36

5.40

5.43

--

--

--

Aug Sep Oct Nov Dec

-

..

--

-

--

--

--

--

--

--

..

--

--

..

--

..

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 117
Table 10s. Mean daily ground-water levels In observation well CRM-27 (map ID #24), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999

[Water levels measured as feet below land surface; , value not measured or recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

-

-

~

-

-

-

~

-

~

-

~

--

~

2.45

2.44

2.94

3.20

3.03

3.20

4.28

4.66

4.58

4.57

4.39

4.70

4.99

4.85

4.50

-

-

..

Mar

3.32

4.20

4.42

4.19

4.32

4.29

4.38

5.02

4.73

3.95

3.61

3.47

2.40

2.55

2.71

3.38

3.85

4.11

3.80

3.95

4.06

4.03

3.94

3.89

4.00

4.29

4.01

3.10

2.27

2.26

-0.20

Apr

-1.23

-2.57

-2.75

-2.48

-2.29

-1.70

-0.98

-0.38

-0.02

-0.16

-0.18

0.29

0.71

0.80

1.02

0.90

0.21

0.25

-0.11

-0.60

-0.51

-0.37

-0.32

0.00

0.67

0.71

0.80

1.04

1.25

0.96

..

May

1.47

1.55

1 .41

1.68

1.95

2.06

2.92

2.83

2.70

2.90

2.88

3.54

3.18

3.25

3.63

3.46

3.59

2.79

2.58

2.60

2.63

3.36

3.43

2.75

3.37

3.41

3.11

2.62

1.26

1.15

1.08

Jun

1998

1.10

1.47

1.36

2.36

2.56

2.73

2.92

2.89

2.97

2.50

1.81

0.71

-0.59

-1.22

-1.99

-1.39

-0.94

-0.13

-0.34

-0.74

-1.55

-2.57

-3.20

-3.32

-4.11

-4.30

-3.88

-4.24

-3.68

-3.22

..

Jul

-3.11

-3.46

-4.06

-3.87

-2.92

-1.50

-0.55

-0.16

0.18

0.59

0.86

1.00

1.05

1.29

1.69

2.14

2.46

2.69

3.04

3.09

3.14

3.08

3.25

3.32

3.54

3.56

3.17

2.51

2.48

2.93

3.50

Aug

3.57

3.74

3.75

3.76

3.78

3.42

3.31

3.40

3.43

3.43

3.45

3.64

3.67

3.65

3.61

3.74

3.47

3.55

3.69

3.73

3.66

3.52

4.00

4.15

3.24

3.00

2.89

2.60

2.63

2.80

2.77

Sep

3.29

3.63

3.91

3.74

3.62

3.69

3.81

3.79

3.79

3.88

3.94

3.99

3.97

3.91

3.72

3.69

3.76

3.88

4.08

4.10

3.89

3.67

3.16

3.15

3.45

3.46

3.25

3.13

3.20

3.19

Oct

3.04

3.10

3.11

3.09

2.94

2.91

3.64

2.52

2.73

3.64

3.78

3.74

3.74

3.62

3.50

3.79

3.66

2.68

1.83

0.99

0.80

0.99

1.57

2.09

2.40

2.60

2.69

2.77

2.93

2.35

2.21

Nov

2.03

2.02

2.24

2.38

2.58

2.67

2.69

2.82

1.98

2.38

1.44

1.27

1.68

1.87

1.76

1.94

1.76

1.99

1.91

1.92

1.95

2.27

2.55

3.00

3.30

3.18

3.29

3.48

3.74

3.63

..

Dec

3.50

3.84

4.04

4.08

4.21

3.63

2.43

2.61

2.19

1.90

2.22

3.46

3.77

3.83

3.98

4.15

4.28

4.59

4.27

4.29

4.11

3.33

3.77

3.89

4.00

4.03

4.15

4.22

4.30

4.32

4.49

118 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 1Os. Mean daily ground-water levels in observation well CRM-27 (map ID #24), Seminole Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

4.49

4.78

4.76

4.53

4.69

4.38

3.34

3.79

3.58

3.53

3.76

3.73

3.42

3.45

3.70

3.74

3.85

3.81

3.50

3.60

3.78

3.75

3.67

3.37

3.16

3.40

3.62

3.37

3.15

3.13

3.32

Feb Mar Apr May Jun Jul

1999

3.56

3.62

3.70

3.08

3.17

3.11

3.29

3.24

2.92

2.95

2.82

2.41

2.05

2.41

2.74

2.69

2.58

2.60

2.63

2.54

2.31

2.64

2.83

2.88

2.90

2.70

3.27

3.37

--

-

--

Aug Sep Oct Nov Dec

..

--

--

--

..

-

-

-

--

-

--

--

--

--

--

--

--

..

--

--

--

--

--

..

--

--

--

--

--

-

-

TABLES 119
Table 11 a. Mean daily specific conductance in ground water at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, 

Iowa, April 1996 through June 1997

[All values in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb Mar Apr May Jun

1996

643 517

641 518

630 519

596 521

569 521

547 521

533 521

529 522

530

527

517

515

515

514

514

514

514

514

515

515

514

513

514

515

515

515

515

514 -- 577

515 -- 580

516 -- 582

._

Jul

582

583

584

585

586

587

588

589

588

589

592

594

591

592

591

585

584

593

595

593

593

594

594

595

596

598

636

602

603

601

603

Aug

604

603

605

609

612

603

594

597

606

611

615

616

617

615

589

614

614

618

659

629

631

635

607

631

631

--

--

--

--

-

Sep

--

--

--

-

--

--

--

--

--

-

--

--

--

607

603

592

592

592

593

593

595

597

598

598

598

597

597

--

--

--

Oct Nov Dec

--

--

611

611

611

611

611

611

612

563

619

618

618

619

620

570

560

565

570

581

590

595

599

612

615

621

640

654

651

633

120 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11a. Mean daily specific conductance in ground water at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, 

Iowa, April 1996 through June 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

664

682

659

670

680

688

698

701

706

688

670

660

666

689

749

811

811

759

629

705

828

850

798

626

697

821

833

814

812

813

831

Feb

786

695

621

618

618

618

656

740

754

761

722

720

717

714

712

707

668

646

644

645

644

639

628

619

617

617

619

621

--

--

--

Mar

622

623

624

626

629

631

633

635

638

642

641

641

641

642

642

643

647

649

648

645

645

651

648

649

647

645

644

643

641

--

--

Apr May Jun

1997

604

589

573

568

552

539

536

525

513

517

520

521

..

-

--

--

--

--

--

..

-

--

610

610

610

608

614

633

626

619

611

Jul Aug Sep Oct Nov Dec

--

--

--

--

..

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

..

--

-

--

-

--

TABLES 121
Table 11 b. Mean daily specific conductance in ground water at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, 

Iowa, April 1996 through June 1997

[All values listed in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1996

503 505

502 505

500 503

500 503

500 502

501 502

501 501

502 501

501

500

502

502

502

502

502

502

503

502

502

503

504

496

--

506

517

512

506

505

505

505

563

Aug

563

564

565

566

566

566

564

565

565

565

565

565

565

564

564

564

564

564

564

563

563

563

563

563

564

564

564

564

540

496

498

Sep

498

494

493

493

494

495

496

497

497

498

498

499

496

488

486

484

482

480

474

471

471

470

467

467

466

465

465

464

465

469

Oct

470

471

471

472

473

473

474

474

473

474

475

474

475

475

475

476

476

474

469

470

471

469

468

467

467

466

465

467

468

469

466

Nov

469

469

469

470

472

474

475

476

474

473

475

477

478

479

480

478

477

478

481

481

481

482

482

483

484

490

489

488

490

492

_.

Dec

493

492

493

500

502

500

501

504

509

513

494

516

515

516

518

521

522

524

525

526

527

527

538

540

542

545

542

524

480

502

479

122 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 b. Mean daily specific conductance in ground water at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, 

Iowa, April 1996 through July 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

477

Aril

477

497

506

509

517

528

522

484

479

480

481

482

484

482

483

485

485

484

487

486

486

488

493

491

536

538

539

541

543

Feb

545

547

548

549

550

552

544

530

490

490

490

490

490

490

489

490

490

490

504

527

533

543

552

553

514

509

508

509

--

--

--

Mar

508

508

509

509

508

509

509

509

533

513

514

514

514

515

516

517

531

540

623

546

586

650

673

681

689

687

673

661

580

-

-

Apr

--

--

--

--

552

552

554

556

560

559

562

563

566

566

567

568

569

572

574

579

581

582

583

584

585

586

588

590

592

597

-

May Jun

1997

600 594

604 593

606 593

610 591

613 588

616 586

618 584

620 582

622 580

576

-

--

--

--

--

--

--

..

--

--

-

649

649

652

653

654

656

657

661

673

Jul Aug Sep Oct Nov Dec

--

--

--

--

--

_.

--

--

--

--

-

--

--

--

--

--

-

--

--

--

--

--

--

--

--

-

--

-

-

--

--

TABLES 123
Table 11 c. Mean daily specific conductance in ground water at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, 

Iowa, April 1996 through June 1997

[All values listed in microsiemens per centimeter at 25 degress Centigrade; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb Mar Apr May Jun

1996

324 321

327 323

326 324

325 323

322 324

325 325

322 326

321 326

329

328

329

323

327

320

321

330

331

331

330

331

329

327

310

316

308

310

314

316 -- 349

319 -- 349

320 -- 349

_

Jul

349

350

351

352

352

352

352

351

350

350

350

350

350

349

349

352

350

349

349

350

351

351

351

351

351

351

350

350

351

355

359

Aug

359

361

363

365

367

369

373

374

373

373

372

371

370

370

370

370

370

370

370

370

370

370

370

370

370

354

370

372

372

372

372

Sep

372

372

372

372

371

371

371

371

371

371

371

371

365

357

357

357

357

357

357

357

357

358

358

358

358

358

358

358

358

358

Oct

358

359

359

359

359

359

359

359

358

358

359

359

359

359

359

359

359

359

358

358

358

358

358

358

358

358

358

358

358

358

357

Nov

357

357

359

358

360

358

357

357

357

357

357

357

356

357

356

355

355

355

355

355

354

355

355

355

355

355

355

355

356

358

Dec

360

362

364

354

374

376

378

379

381

381

382

383

384

384

385

385

386

386

387

387

388

388

389

394

399

404

408

410

411

413

396

124 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 c. Mean daily specific conductance in ground water at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, 

Iowa, April 1996 through June 1997--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

411

409

404

401

404

409

415

419

425

427

427

423

421

421

430

414

419

419

416

414

416

415

414

416

416

425

452

456

457

459

462

Feb

466

472

477

480

484

485

476

470

461

459

456

451

449

448

447

448

450

450

453

462

463

464

461

453

445

440

438

438

--

--

--

Mar

438

438

437

437

435

430

425

422

418

416

416

415

414

415

415

416

417

417

415

414

412

412

413

414

417

416

413

412

410

--

--

Apr

--

--

--

--

406

404

414

403

402

402

402

402

401

401

401

401

401

401

402

403

403

404

404

404

405

405

406

406

407

408

--

May

409

410

411

412

413

414

416

416

418

--

--

--

--

--

-

--

--

-

-

--

--

-

432

436

438

438

438

438

438

437

438

Jun Jul Aug Sep

1997

438

435

429

428

427

423

419

417

413

409

408

408

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

Oct Nov Dec

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

TABLES 125
Table 11 d. Mean daily specific conductance in ground water at site CRM-12 (map ID #10), East Well Field, Cedar Rapids 

Iowa, April 1996 through July 1997

[All values in microsiemens per centimeter at 25 degrees Centigrade; -, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr

665

664

658

655

656

655

654

653

651

650

652

655

657

654

661

665

667

668

668

667

664

661

634

662

662

662

662

661

661

660

May Jun Jul

1996

660 -- 645

659 -- 644

657 -- 641

655 -- 639

657 - 638

660 -- 635

656 -- 632

654 -- 629

627

626

627

628

630

631

631

633

635

634

632

632

632

631

631

631

630

630

629

649 628

648 627

647 629

632

Aug

631

631

631

630

630

630

631

632

633

632

631

631

630

630

630

630

630

630

629

627

626

625

624

624

624

621

625

625

626

627

627

Sep

627

627

627

627

627

627

628

628

629

629

629

630

598

614

613

613

613

613

613

613

614

615

615

615

615

616

616

616

617

617

Oct

617

617

617

618

622

619

618

619

623

632

627

626

626

629

631

633

634

632

630

624

623

622

619

617

616

616

616

616

616

621

630

Nov

631

632

632

632

632

632

632

633

633

634

636

635

634

634

634

634

635

635

643

637

669

662

661

662

651

694

695

695

692

673

Dec

659

657

645

654

678

666

668

669

668

683

648

701

698

698

701

703

705

706

705

705

706

706

706

706

701

701

731

761

711

786

778

126 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 d. Mean daily specific conductance in ground water at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, 

Iowa, April 1996 through July 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

774

791

788

783

783

780

769

754

753

751

720

694

675

664

658

654

652

648

645

643

651

658

664

655

698

788

802

794

789

775

754

Feb

740

730

724

713

709

699

696

688

682

679

679

683

688

691

695

697

697

698

695

691

686

678

674

669

666

663

667

672

-

-

--

Mar

673

673

673

673

672

669

667

665

664

658

660

661

661

662

661

661

661

662

662

665

669

672

673

675

678

681

685

688

687

--

--

Apr

-

-

--

--

685

688

691

693

696

698

700

703

704

704

702

702

703

703

703

703

711

713

712

713

713

713

713

713

713

712

-

May

712

710

709

707

708

709

710

711

713

--

--

--

--

--

--

--

--

--

--

--

--

--

631

630

630

631

630

630

630

624

682

Jun Jul Aug Sep

1997

670 673

632 677

656 678

678 676

675 676

670 677

655 678

654 678

667 677

636 676

646

666

665

661

662

663

659

659

662

663

665

664

669

675

650

678

676

673

671

671

--

Oct Nov Dec

--

-

-

--

-

--

--

..

-

--

--

..

--

..

-

..

..

-

..

..

..

--

--

..

-

-

..

..

--

--

TABLES 127
Table 11 e. Mean daily specific conductance in ground water at site CRM-20 (map ID #17), Northwest Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; , value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

-

--

--

--

-

--

--

--

..

519

516

514

511

508

504

500

495

490

485

481

478

475

490

502

503

501

498

496

..

_

Mar

495

493

490

486

483

479

477

475

474

462

446

443

441

439

437

435

431

425

422

424

432

442

470

490

492

493

494

497

504

516

516

Apr

550

634

552

565

508

480

479

479

475

475

481

488

493

488

483

485

490

492

490

484

474

473

474

474

474

474

475

478

481

481

__

May

478

483

490

533

542

550

560

562

556

551

548

548

549

550

549

550

551

550

548

547

546

545

545

543

540

524

510

501

492

489

490

Jun

1998

491

490

478

481

481

480

483

488

493

497

498

503

521

529

547

565

516

445

452

477

489

477

463

462

453

433

421

413

407

399

Jul

399

401

405

414

430

434

424

416

416

427

443

458

461

451

444

437

439

465

491

496

496

495

492

477

459

442

427

426

431

430

428

Aug Sep

426

425

423

420

417

413

410

408

403

401

395

392

389

388

388

383

--

--

--

--

--

--

429

426

429

429

426

422

419

419

Oct

420

420

419

418

417

417

421

424

426

424

420

420

423

428

431

432

437

446

456

463

460

454

460

484

490

499

398

400

510

510

504

Nov

505

503

499

--

493

490

479

473

481

493

498'

504

506

508

510

512

515

518

520

523

527

530

537

539

538

535

531

528

525

525

Dec

526

528

531

533

536

539

541

543

545

546

546

545

543

542

540

539

540

542

540

539

538

537

536

535

536

536

536

536

535

534

532

128 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11e. Mean daily specific conductance in ground water at site CRM-20 (map ID #17), Northwest Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

531

530

530

532

536

550

556

566

577

578

577

578

582

586

588

589

587

585

583

581

581

568

551

550

547

543

539

537

561

584

584

Feb

586

589

589

587

584

582

582

578

574

569

566

566

565

563

557

549

539

529

523

519

517

515

513

511

507

504

499

494

--

--

--

Mar

477

460

462

470

479

485

489

494

498

502

506

511

516

519

522

517

503

492

491

498

505

509

515

520

520

535

538

540

539

537

537

Apr May Jun Jul Aug Sep Oct Nov Dec

1999

-

..

..

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

-

TABLES 129
Table 11f. Mean daily specific conductance in ground water at site CRM-21 (map ID #18), Northwest Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

-

--

--

--

-

-

--

-

-

577

577

578

578

579

580

581

581

582

583

583

590

600

600

591

593

600

606

611

-

--

_

Mar

612

606

585

569

562

574

585

583

579

594

609

592

590

597

596

594

593

595

599

602

604

602

603

602

588

582

582

571

568

575

492

Apr

369

395

419

451

480

499

510

520

528

536

542

544

551

519

526

525

526

527

529

531

532

532

530

525

517

507

499

495

499

514

._

May

541

546

578

606

593

577

569

569

573

575

575

574

577

579

576

574

574

576

575

571

569

570

573

575

576

597

691

739

755

685

604

Jun

1998

574

562

579

612

620

637

647

647

645

642

638

645

689

678

664

653

643

632

622

614

602

597

579

527

342

364

365

386

426

444

._

Jul

508

510

379

401

413

414

416

422

439

446

442

437

432

419

470

544

515

516

467

467

472

474

474

567

700

726

733

732

736

746

754

Aug Sep

758

760

759

757

746

736

724

722

720

702

693

692

695

693

689

684

--

--

--

--

--

-

682

690

695

695

698

703

699

702

Oct

706

704

696

695

704

715

726

739

767

111

788

787

780

771

760

741

122

706

693

707

743

783

756

712

703

689

686

715

733

729

744

Nov

725

741

776

779

792

798

728

658

619

596

596

631

688

688

688

726

690

607

573

561

557

555

581

600

595

591

591

602

621

640

Dec

655

669

681

692

700

704

702

698

692

687

683

679

672

664

659

659

666

678

693

685

676

674

670

669

666

665

665

668

669

668

665

130 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 f. Mean daily specific conductance in ground water at site CRM-21 (map ID #18), Northwest Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

664

664

664

666

672

683

686

686

687

690

696

704

710

714

719

722

723

725

726

726

722

694

657

650

643

638

634

631

659

681

680

Feb

680

679

679

679

680

680

681

681

682

682

683

683

680

676

682

690

696

710

706

660

618

576

543

523

506

494

488

485

--

--

-

Mar Apr May Jun

1999

480

469

472

467

469

477

506

560

614

642

652

650

638

629

629

635

643

654

667

677

679

678

677

677

676

691

712

713

711

710

708

Jul Aug Sep Oct Nov Dec

--

--

--

--

..

..

--

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 131
Table 11 g. Mean daily specific conductance in ground water at site CRM-22 (map ID #19), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; -, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

-

--

--

-

--

--

..

--

577

577

578

578

579

580

581

581

582

583

583

590

600

600

591

593

600

606

611

--

--

_

Mar

612

606

585

569

562

574

585

583

579

594

609

592

590

597

596

594

593

595

599

602

604

602

603

602

588

582

582

571

568

575

492

Apr

369

395

419

451

480

499

510

520

528

536

542

544

551

523

562

561

563

565

564

560

561

562

561

546

550

553

557

559

560

562

_.

May Jun

1998

563 476

564 477

564

561

544

545

547

548

547

545

543

538

537

538

528

531

520

506

498

489

484

483

485

487

487

489

486

484

473

473

470

Jul Aug Sep Oct

454

463

473

475

471

463

456

456

451

456

464

475

477

482

489

485

487

498

513

528

543

557

476 563

468 565

460 567

457 564

465 561

463 558

459 555

454 554

553

Nov

548

529

528

540

556

563

569

571

571

570

570

571

572

579

590

600

612

619

620

614

599

584

545

583

582

584

585

586

587

587

..

Dec

588

588

588

586

583

576

573

572

572

571

570

560

545

533

527

525

526

529

536

538

545

547

551

557

566

576

582

583

584

583

582

132 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 g. Mean daily specific conductance in ground water at site CRM-22 (map ID #19), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

581

579

578

580

587

596

604

613

620

624

625

627

629

634

638

640

639

636

633

630

627

627

627

626

622

617

611

607

605

603

601

Feb

601

605

606

603

599

596

597

599

593

587

584

581

581

581

577

572

564

554

544

535

531

532

529

522

514

505

499

499

--

--

--

Mar

518

517

526

533

537

540

543

546

549

553

558

563

566

570

565

545

530

531

536

545

542

541

541

543

545

546

559

567

574

574

573

Apr May Jun Jul Aug Sep Oct Nov Dec

1999

--

--

..

..

--

--

--

--

..

--

--

-

--

--

--

--

--

--

--

--

--

--

..

--

--

--

--

--

--

TABLES 133
Table 11 h. Mean daily specific conductance in ground water at site CRM-23 (map ID #20), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

--

--

-

--

--

--

..

453

453

451

449

447

446

445

444

448

454

446

442

446

479

505

506

504

503

504

..

--

_

Mar

504

493

493

496

500

502

500

494

483

487

494

494

495

504

511

512

511

510

510

--

-

--

--

515

514

509

499

492

492

492

501

Apr

516

522

526

522

516

508

497

487

482

475

478

485

491

489

484

484

484

487

491

494

501

504

500

496

497

496

497

500

499

500

._

May

500

500

501

505

516

519

519

516

515

517

519

501

504

507

509

505

503

504

505

504

504

512

514

524

525

527

531

532

516

502

496

Jun

1998

494

495

508

513

509

506

508

510

510

521

500

506

505

500

494

492

489

489

489

497

507

513

518

520

438

403

406

424

468

479

_.

Jul

476

432

418

418

426

423

420

421

428

427

427

430

437

443

448

447

445

444

443

462

450

452

454

462

482

501

516

530

541

554

567

Aug Sep

573

570

565

561

557

552

547

544

545

540

532

535

543

550

551

545

--

--

--

--

--

--

524

524

523

524

522

518

514

511

Oct

509

509

512

516

520

512

511

525

515

521

534

547

552

555

567

574

580

579

581

533

518

521

518

515

517

522

525

529

530

534

534

Nov

536

538

538

544

550

555

561

560

559

557

554

549

513

485

469

463

457

458

457

455

454

455

462

471

477

485

491

493

494

498

Dec

506

514

524

533

540

546

549

551

551

550

550

538

533

543

557

573

587

603

614

617

626

640

654

667

680

689

694

693

693

689

682

134 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 h. Mean daily specific conductance in ground water at site CRM-23 (map ID #20), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

675

669

663

658

654

654

669

703

726

746

750

732

702

676

653

633

616

604

596

590

584

576

567

561

554

547

541

535

531

528

523

Feb

520

518

516

515

514

514

513

513

512

511

509

507

505

504

505

506

505

505

503

501

499

495

492

489

484

478

471

464

--

--

--

Mar Apr May Jun Jul Aug Sep

1999

459

455

450

447

445

443

443

442

439

434

429

425

422

420

419

419

420

420

420

426

442

462

470

470

469

469

462

459

459

459

466

Oct Nov Dec

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

-

--

--

--

--

TABLES 135
Table 11 i. Mean daily specific conductance in ground water at site CRM-25 (map ID #22), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through February 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

--

--

-

--

..

--

--

..

--

..

..

361

361

362

361

359

358

352

342

332

324

329

412

501

506

506

-

--

Mar

521

522

521

527

532

539

543

547

534

531

529

541

455

315

111

262

260

268

275

286

291

378

491

468

463

461

460

460

454

450

321

Apr

176

149

167

302

363

361

407

422

443

449

454

457

457

456

456

457

455

457

460

459

460

462

462

463

465

466

469

468

467

468

May

470

471

472

473

472

469

468

466

465

463

461

458

456

455

453

453

454

454

454

455

457

458

460

460

460

460

459

459

448

439

442

Jun

1998

443

447

449

452

454

458

464

467

461

463

457

453

378

312

304

389

448

483

503

511

520

497

474

476

464

469

494

500

509

512

_.

Jul

513

514

508

515

510

523

535

538

540

542

537

535

536

537

536

534

533

531

529

528

527

527

527

528

529

529

530

530

530

531

532

Aug

533

533

533

532

530

525

517

512

508

504

503

503

503

504

503

506

503

497

496

491

488

488

489

488

489

485

484

491

479

474

471

Sep

470

473

476

482

484

485

490

496

500

501

503

504

503

502

495

486

482

479

478

477

479

481

481

480

484

489

494

497

492

496

Oct

505

509

506

505

497

497

505

499

493

497

501

503

502

501

497

497

493

488

481

475

479

479

484

493

497

499

496

497

496

497

502

Nov

499

492

493

495

496

498

498

497

492

493

486

483

482

483

484

483

461

483

484

485

486

485

487

490

490

491

490

489

488

488

Dec

488

488

483

480

477

481

471

465

462

462

461

469

476

481

482

483

484

482

478

485

483

480

477

479

477

476

471

468

467

470

471

136 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 i. Mean daily specific conductance in ground water at site CRM-25 (map ID #22), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

469

465

464

464

464

462

453

442

444

437

431

378

330

347

351

325

347

319

315

329

328

341

350

329

310

326

316

289

339

313

320

Feb

326

337

339

309

346

321

334

336

332

357

396

410

383

363

345

327

322

322

319

311

319

330

319

387

431

430

425

428

-

--

--

Mar Apr May Jun Jul Aug Sep Oct Nov Dec

1999

--

--

--

--

..

--

..

--

--

--

--

--

--

--

--

--

--

..

--

--

..

--

-

--

..

--

--

--

--

--

TABLES 137
Table 11 j. Mean daily specific conductance in ground water at site CRM-27 (map ID #24), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

--

--

--

..

..

--

..

--

..

-

-

--

421

422

423

424

425

424

423

421

418

419

419

419

418

415

416

..

--

_

Mar

424

416

413

410

407

406

405

402

399

399

400

405

385

372

365

361

353

344

337

331

326

320

312

303

304

305

316

313

309

302

302

Apr

292

274

293

308

310

321

332

331

325

323

323

323

323

322

320

319

318

318

317

318

318

316

315

314

315

314

314

314

314

314

_.

May

315

315

315

314

314

314

317

319

318

322

328

331

333

337

340

345

349

344

340

339

339

346

353

351

358

361

362

363

356

362

364

Jun

1998

366

368

371

383

396

395

394

401

408

423

425

433

433

411

349

389

373

380

413

436

438

438

438

438

445

364

304

307

318

335

Jul

396

383

385

390

366

370

371

377

398

418

428

434

435

421

409

404

403

405

408

412

418

423

429

436

443

447

452

458

464

467

467

Aug

470

479

485

488

489

490

486

478

483

486

489

490

492

492

479

474

475

475

472

471

471

471

471

471

507

554

563

558

572

562

562

Sep

529

520

518

502

493

486

482

481

479

475

471

470

467

473

472

471

471

470

469

468

465

489

544

564

552

562

558

582

544

526

..

Oct

513

504

495

493

485

488

470

509

500

478

452

447

442

450

439

432

425

501

429

426

424

426

422

415

414

418

423

429

432

429

426

Nov

422

424

441

444

437

431

425

420

447

468

471

481

483

481

484

474

488

486

470

458

449

444

441

452

458

450

427

411

406

405

Dec

407

408

409

411

412

455

524

495

514

523

514

470

458

451

429

415

410

408

406

406

433

474

425

419

424

431

440

444

447

453

462

138 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11 j. Mean daily specific conductance in ground water at site CRM-27 (map ID #24), Seminole Well Field, Cedar 

Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

474

482

488

493

493

494

496

495

491

490

489

489

490

491

492

493

494

495

494

494

494

493

491

491

490

489

486

484

483

481

479

Feb

477

475

473

471

474

475

472

468

464

469

462

437

440

445

444

442

441

441

441

441

447

447

445

442

441

460

464

450

--

--

--

Mar Apr May Jun Jul Aug Sep Oct Nov Dec

1999

435

--

--

--

--

--

--

--

--

--

..

..

-

--

--

--

--

--

--

--

--

--

--

--

..

..

--

--

--

..

..

TABLES 139
Table 11k. Mean daily specific conducatnce in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999

[All values in microsiemens per centimeter at 25 degrees Centigrade; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb Mar Apr May Jun

1996

394 425

367 410

347 413

363 418

392 409

419 406

440

458

472

484

494

505

508

507

503

498

471

458

458

464

462

432

382

377

420

443

439

426 -- 588

423 -- 590

439 - 551

_

Jul

558

579

579

582

572

544

530

512

494

472

440

441

458

428

411

393

407

404

424

407

414

421

420

425

391

388

412

402

365

367

365

Aug

364

362

363

374

386

367

347

339

343

343

355

359

351

338

339

344

350

362

374

376

375

356

364

371

353

384

404

408

397

380

372

Sep

370

369

368

358

348

343

346

352

362

373

387

379

382

390

381

361

350

357

352

356

364

365

361

367

367

378

392

414

408

420

Oct

432

453

479

510

525

549

560

572

583

594

621

637

645

638

625

619

599

584

549

542

550

561

541

533

564

581

604

617

622

--

503

Nov

479

483

490

501

507

512

503

493

492

493

496

497

499

499

501

509

506

511

498

487

478

477

488

491

487

493

505

511

508

501

Dec

496

499

--

579

570

560

549

549

553

545

534

526

519

513

497

493

500

512

525

540

544

547

560

564

568

573

584

586

577

573

564

140 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11k. Mean daily specific conducatnce in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

560

549

533

507

498

477

447

400

384

421

458

489

514

530

539

545

552

558

562

560

557

523

473

501

504

484

488

500

499

507

519

Feb

519

499

505

492

472

465

465

466

478

488

494

497

503

512

524

530

531

485

235

270

233

208

202

220

259

297

324

343

--

--

~

Mar Apr

325

327

--

--

471

471

451

476

478

485

486

489

498

509

507

511

513

514

515

514

508

502

486

471

452

432

420

405

391

388

._

May

404

408

417

437

455

470

484

484

486

490

496

502

506

504

501

495

483

471

442

456

436

458

460

454

454

459

466

475

492

511

510

Jun

1997

493

487

466

447

436

428

424

416

415

422

416

418

385

371

341

315

343

366

346

344

335

341

340

290

314

301

334

353

371

336

Jul

375

366

350

368

384

390

386

382

374

365

465

512

510

512

515

511

459

483

500

514

522

524

530

522

517

511

504

500

477

464

431

Aug

445

465

473

464

429

398

371

374

381

383

389

409

414

403

391

371

353

359

369

371

366

356

344

342

339

340

351

340

320

329

323

Sep

294

336

394

385

357

352

353

381

397

380

317

304

282

305

294

288

285

280

334

346

351

344

352

364

358

332

285

261

274

257

Oct

296

351

347

348

346

345

355

385

391

398

394

395

400

410

421

448

451

461

475

487

492

500

507

511

510

504

495

512

532

516

515

Nov

516

512

507

505

502

502

504

505

505

499

490

509

514

499

488

478

484

487

472

475

474

473

465

462

465

467

470

473

478

475

Dec

469

470

474

481

479

492

474

473

472

470

480

490

490

481

479

--

497

496

495

497

495

491

492

494

510

503

500

503

500

499

504

TABLES 141
Table 11k. Mean daily specific conducatnce in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

515

514

500

478

476

464

486

483

478

495

514

525

530

541

543

541

541

544

537

528

525

520

515

514

510

512

511

502

491

486

481

Feb

475

468

455

456

459

461

452

449

449

--

--

--

--

--

443

460

467

442

396

408

408

382

398

417

428

448

454

463

--

--

..

Mar

475

487

492

495

503

504

505

497

488

489

490

498

502

498

506

510

509

501

483

480

481

480

501

518

508

504

496

484

480

475

378

Apr

371

392

417

437

449

458

465

472

476

476

476

482

487

468

439

424

412

419

418

415

412

416

417

422

427

429

428

429

432

435

May

436

436

440

484

515

522

519

516

513

505

484

458

453

443

443

442

438

432

429

432

437

429

436

442

454

478

525

530

527

535

532

Jun

1998

533

552

558

566

542

543

545

538

508

470

482

445

373

355

380

416

414

442

404

411

374

361

380

369

373

386

405

405

423

417

__

Jul

400

378

371

388

420

435

486

510

539

537

556

557

564

549

526

525

521

522

502

465

455

449

457

415

387

391

391

330

314

318

314

Aug Sep

315

319

328

327

320

332

330

400

424

432

457

464

478

475

466

512

--

-

--

--

--

420

425

440

447

453

432

416

416

Oct

429

442

463

494

477

452

453

478

507

522

534

543

548

546

521

523

508

436

466

475

455

500

540

574

584

588

589

587

581

561

564

Nov

570

576

570

574

576

577

575

575

577

569

554

547

550

559

565

570

573

579

581

578

577

582

586

586

587

584

584

583

584

586

Dec

580

583

583

583

584

579

571

567

564

565

565

568

566

570

566

566

566

572

576

572

580

606

628

635

637

641

633

630

629

645

649

142 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 11k. Mean daily specific conducatnce in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

651

642

634

628

626

622

618

616

614

614

608

600

593

586

586

586

584

583

588

594

588

577

574

571

586

573

564

562

560

566

564

Feb

557

544

516

501

504

511

508

504

507

496

494

477

485

497

511

523

528

535

540

536

536

540

542

543

549

556

563

568

.

--

--

Mar

--

579

571

517

517

536

555

558

561

563

572

583

575

574

579

578

579

578

580

576

535

521

524

534

541

543

549

554

555

558

556

Apr May Jun Jul Aug Sep Oct Nov Dec

1999

--

..

..

--

..

--

--

--

--

--

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

-

TABLES 143
Table 12a. Mean daily pH in ground water at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, April 1996 

through June 1997

[All values in standard units; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun

1996

7.8 7.6

7.8 7.6

7.8 7.7

7.9 7.7

7.9 7.7

7.9 7.7

7.9 7.7

7.9 7.7

7.9

7.9

7.9

7.9

7.9

7.8

7.8

7.8

7.8

7.8

7.8

7.7

7.7

7.7

7.6

7.6

7.6

7.6

7.6

7.6 -- 7.5

7.6 -- 7.5

7.6 - 7.6

..

Jul

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.6

7.7

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.8

7.8

7.8

7.8

7.7

7.7

7.7

7.6

7.5

Aug

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.8

7.8

7.8

7.8

7.7

7.7

7.8

7.8

7.7

7.7

7.7

--

--

--

--

--

Sep

--

--

--

-

--

--

--

--

--

--

--

--

--

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.7

--

--

--

Oct Nov Dec

--

--

--

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.3

7.3

7.2

7.2

7.2

7.2

7.3

7.3

7.5

7.4

7.4

7.2

144 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12a. Mean daily pH in ground water at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, April 1996 

through June 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.0

7.0

7.1

7.1

7.2

7.2

7.2

7.3

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.4

7.4

7.3

7.2

7.3

7.4

7.4

7.4

7.2

7.3

7.5

7.5

7.5

7.5

7.5

7.5

Feb

7.5

7.4

7.3

7.3

7.3

7.3

7.0

7.1

7.1

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.1

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.2

--

--

--

Mar

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.5

7.5

7.5

7.5

--

--

Apr May Jun Jul

1997

7.3

7.3

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

--

--

--

..

--

--

--

--

--

--

6.7

6.7

6.8

6.8

6.9

7.2

7.1

7.2

7.3

Aug Sep Oct Nov Dec

--

--

..

--

-

--

--

..

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

TABLES 145
Table 12b. Mean daily pH in ground water at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, April 1996 

through July 1997

[All values in standard units; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1996

6.5 6.7

6.5 6.7

6.6 6.7

6.6 6.7

6.6 6.7

6.6 6.7

6.6 6.7

6.6 6.7

6.6

6.6

6.6

6.6

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.6

6.6

6.6

6,6

6.7

6.7

7.3

Aug

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.7

7.7

Sep

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.5

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

Oct

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.6

Nov

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

Dec

7.8

7.9

7.9

7.6

7.4

7.4

7.4

7.4

7.4

7.5

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.4

146 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12b. Mean daily pH in ground water at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, April 1996 

through July 1997--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

Feb

7.6

7.6

7.6

7.6

7.6

7.6

7.5

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.5

7.5

7.5

7.6

7.6

7.6

7.6

--

--

--

Mar

7.6

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.6

7.7

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.7

--

--

Apr

--

--

--

--

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

--

May

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

--

--

--

--

--

--

--

--

--

--

~

--

--

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.7

8.0

Jun Jul

1997

8.1 7.1

8.2 7.1

8.2 7.1

8.3 7.1

8.3 7.1

8.3 7.1

8.4 7.1

8.4 7.2

8.4 7.2

8.5 7.2

8.5

8.5

--

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.1

7.1

7.1

--

Aug Sep Oct Nov Dec

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

TABLES 147
Table 12c. Mean daily pH in ground water at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, April 1996 

through June 1997

[All values in standard units; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun

1996

7.8 7.8

7.8 7.8

7.8 7.8

7.8 7.8

7.7 7.8

7.8 7.8

7.7 7.8

7.7 7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

-

7.7

7.7

7.7

7.7

7.7 -- 7.9

7.8 -- 7.9

7.7 -- 7.9

Jul

7.9

8.0

8.0

8.0

8.0

8.0

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

7.9

7.3

Aug

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

Sep

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.4

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

Oct

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.5

7.4

Nov

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

Dec

7.6

7.6

7.6

7.5

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.5

148 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12c. Mean daily pH in ground water at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, April 1996 

through June 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.7

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.6

7.7

7.6

Feb

7.6

7.7

7.7

7.7

7.7

7.7

7.4

7.2

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

--

--

-

Mar

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

--

--

Apr

--

--

--

--

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

-

May

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.7

--

--

--

--

--

--

-

--

--

--

--

--

--

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

Jun Jul

1997

7.4

7.6

7.8

7.6

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

..

--

--

--

..

--

-

-

..

--

--

--

..

--

--

--

--

--

Aug Sep Oct Nov Dec

--

..

--

--

--

..

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

TABLES 149
Table 12d. Mean daily pH in ground water at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa, April 1996 

through July 1997

[All values in standard units; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun

1996

7.5 7.8

7.5 7.8

7.6 7.8

7.6 7.8

7.6 7.8

7.6 7.8

7.6 7.8

7.6 7.8

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7 -- 7.1

7.8 -- 7.1

7.8 -- 7.1

__

Jul

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.2

Aug

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

Sep

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.3

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

Oct

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.3

7.1

Nov

7.1

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.3

7.3

7.3

7.3

7.5

7.3

7.3

7.3

7.3

7.3

Dec

7.3

7.4

7.1

7.0

7.3

7.4

7.4

7.5

7.6

7.6

7.3

7.4

7.4

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.7

7.5

7.4

150 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12d. Mean daily pH in ground water at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa, April 1996 

through July 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.6

7.6

7.6

7.6

7.6

7.6

7.6

Feb

7.6

7.7

7.7

7.7

7.7

7.7

7.4

7.2

7.3

7.3

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

--

--

--

Mar

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

-

--

Apr

-

-

--

-

6.7

6.7

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.8

6.8

6.8

6.7

6.8

6.8

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.7

6.7

--

May

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

--

--

--

--

--

--

--

--

--

--

-

--

--

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.7

Jun Jul Aug Sep Oct

1997

6.7 6.8

6.8 6.9

6.8 6.9

6.8 6.9

6.8 6.9

6.8 6.9

6.8 6.9

6.8 6.9

6.8 6.9

6.8 6.9

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

--

Nov Dec

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

..

--

--

..

--

--

--

--

--

--

--

--

TABLES 151
Table 12e. Mean daily pH in ground water at site CRM-20 (map ID #17), Northwest Well Field, Cedar Rapids, 

February 1998 through March 1999

[All values in standard units; , value not measured, not recorded, or rejected after data review]

Iowa,

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

-

--

--

-

--

--

--

--

--

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.5

7.5

7.5

7.5

7.4

--

-

_

Mar

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.6

7.6

7.6

7.6

7.5

7.5

7.5

7.6

7.6

7.5

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

Apr

7.3

7.3

7.3

7.2

7.2

7.2

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.3

7.3

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

._

May

7.2

7.2

7.2

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.2

7.2

7.1

7.1

7.1

7.1

Jun

1998

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

Jul

7.3

7.3

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.1

7.1

7.1

7.1

Aug Sep

7,

7,

7,

,2

,2

.2

7.2

7.

7.

7,

7.

7.

7.

7.

7.

7.

7.

7.

7.

--

-

--

-

--

--

--

--

--

--

--

--

-

--

.2

.2

,2

.2

,3

,3

.3

,3

,3

.3

.3

,3

-

--

--

--

--

-

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

Oct

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

Nov

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.4

7.3

7.3

7.3

7.3

7.3

7.3

7.3

Dec

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.2

7.2

7.2

7.2

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

152 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12e. Mean daily pH in ground water at site CRM-20 (map ID #17), Northwest Well Field, Cedar Rapids, Iowa, 

February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.1

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

Feb

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

--

--

--

Mar Apr May Jun Jul

1999

7.5

7.5

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.6

7.7

7.7

7.7

7.7

7.7

Aug Sep Oct Nov Dec

--

..

--

--

--

--

--

--

--

--

-

-

--

--

-

-

-

-

--

-

--

--

-

--

--

--

--

--

-

--

--

TABLES 153
Table 12f. Mean daily pH in ground water at site CRM-21 (map ID #18), Northwest Well Field, Cedar Rapids, 

February 1998 through March 1999

[All values in standard units; --, value not measured, not recorded, or rejected after data review]

Iowa,

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

-

--

--

--

-

--

-

-

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.7

7.7

7.7

7.7

7.7

--

--

_

Mar

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

Apr

7.7

7.7

7.7

7.8

7.8

7.9

7.9

7.9

7.9

7.9

8.0

8.0

8.0

7.6

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

._

May

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.1

7.1

7.1

7.1

7.1

Jun

1998

7.2

7.2

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.6

7.6

7.6

7.6

7.7

7.6

_.

Jul

7.5

7.5

7.6

7.6

7.6

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.2

7.2

7.2

7.3

7.3

7.2

7.2

7.2

7.1

7.0

6.9

6.9

6.9

6.9

6.9

6.9

Aug Sep

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

--

-

--

--

--

--

7.0

6.9

6.9

6.9

6.9

6.9

7.0

7.0

._

Oct

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

6.9

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

Nov

7.0

7.0

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

7.0

6.9

6.9

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

6.9

6.9

6.9

6.9

6.9

6.9

6.9

__

Dec

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

154 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12f. Mean daily pH in ground water at site CRM-21 (map ID #18), Northwest Well Field, Cedar Rapids, Iowa, 

February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

Feb

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.2

7.2

7.2

7.3

7.3

--

--

--

Mar Apr May Jun Jul Aug Sep

1999

7.2

6.9

7.1

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.2

7.2

7.2

7.2

7.2

7.2

Oct Nov Dec

--

..

--

--

--

--

--

-

--

--

--

-

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

..

TABLES 155
Table 12g. Mean daily pH in ground water at site CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through March 1999

[All values in standard units; , value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

--

--

--

-

--

--

--

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.7

7.7

7.7

7.7

7.7

--

--

Mar

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

Apr

7.7

7.7

7.7

7.8

7.8

7.9

7.9

7.9

7.9

7.9

8.0

8.0

8.0

7.9

7.7

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

8.1

8.1

8.0

7.9

7.8

7.7

7.6

..

May Jun Jul

1998

7.6 7.3

7.6 7.3

7.6

7.5

7.5

7.5

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.3

7.3

Aug Sep Oct

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3 7.5

7.3 7.6

7.3 7.6

7.3 7.6

7.3 7.6

7.3 7.6

7.3 7.6

7.3 7.6

7.6

Nov

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6-

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.6

7.6

Dec

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.6

7.5

7.5

7.5

7.4

156 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12g. Mean daily pH in ground water at site CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

7.6

7.6

7.6

7.6

7.6

7.6

7.7

7.7

7.7

7.7

Feb

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

-

--

--

Mar Apr May Jun Jul

1999

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.0

7.9

7.9

7.9

7.9

7.9

Aug Sep Oct Nov Dec

--

-

--

--

-

--

--

-

--

--

--

--

--

--

--

--

--

-

..

--

--

--

--

-

..

-

--

--

--

--

TABLES 157
Table 12h. Mean daily pH in ground water at site CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through March 1999

[All values in standard units; , value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

--

--

--

--

--

--

--

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.2

7.1

7.1

7.1

7.1

7.1

7.1

-

--

_

Mar

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

--

--

--

--

7.1

7.0

7.0

7.0

7.0

7.0

7.0

7.0

Apr

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

..

May

7.1

7.1

7.1

7.1

7.0

7.0

7.0

7.1

7.1

7.1

7.0

7.0

7.0

7.0

7.0

6.9

6.9

6.9

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

6.9

7.0

7.0

Jun

1998

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

6.9

6.9

6.9

6.9

6.9

6.9

7.3

7.6

7.6

7.7

7.7

7.7

..

Jul

7.6

7.7

7.7

7.6

7.6

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.2

7.2

7.1

7.1

7.0

7.0

7.0

Aug Sep

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

6.9

6.9

6.9

-

..

--

--

--

--

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

Oct

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.6

6.6

6.7

6.7

6.6

6.6

6.6

6.6

6.7

6.7

6.7

6.7

6.7

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

Nov

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.9

6.8

6.8

6.8

6.8

6.8

Dec

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.9

6.9

6.9

6.9

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

158 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12h. Mean daily pH in ground water at site CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

6.7

6.7

6.7

6.8

6.8

6.8

6.8

6.7

6.7

6.7

6.7

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

Feb

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.9

6.9

6.9

6.9

6.9

--

--

--

Mar Apr May Jun Jul

1999

6.9

6.9

6.9

6.9

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.9

6.9

6.9

6.9

6.9

6.9

Aug Sep Oct Nov Dec

--

-

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

TABLES 159
Table 12i. Mean daily pH in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar Rapids, Iowa, October 

1996 through March 1999

[All values in standard units; --, value not measured, not recorded, or rejected after data review]

Day Jan Feb Mar Apr May Jun Jul

1996

1

2

3

4

5

6

7

g

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Aug Sep Oct

8.5

8.6

8.7

8.7

8.7

8.6

8.4

8.4

8.3

8.3

8.3

8.3

8.2

8.2

8.2

8.1

8.0

8.1

8.2

8.1

8.0

7.9

7.9

8.0

8.0

7.9

8.0

8.0

8.0

8.0

8.0

Nov Dec

8.1

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.1

8.1

8.1

8.0

8.1

8.1

8.1

8.0

8.0

8.0

8.0

8.0

8.0

160 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12i. Mean daily pH in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar Rapids, Iowa, April 

1996 through March 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

8.0

8.0

8.0

8.0

8.0

8.0

8.0

7.9

7.9

7.9

7.9

7.9

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

Feb

8.2

8.2

8.2

8.3

8.3

8.3

8.3

8.3

8.4

8.4

8.4

8.5

8.5

8.5

8.6

8.6

8.6

8.6

8.7

8.6

8.6

8.6

8.7

8.6

8.6

8.6

8.7

8.7

--

--

Mar Apr May Jun

1997

8.8 - - 8.7

8.8 - -- 8.8

8.7

8.6

8.7 - 8.8

8.9 - 8.7

9.0 -- 8.5

8.9 -- 8.4

8.8 -- 8.4

9.3 -- 8.3

8.3

9.1

8.9

8.8

8.9

8.6

8.8

9.0

8.9

9.0

9.0

9.1

8.9

8.8

8.8 8.8

8.8 8.7

8.8 8.8

8.7 8.6

8.8 8.6

8.7 8.7

8.8

Jul

8.7

8.7

8.8

8.7

8.8

8.9

9.0

9.1

9.1

9.1

8.8

8.5

8.3

8.4

8.5

8.4

8.1

8.1

8.2

8.2

8.3

8.4

8.4

8.4

8.5

8.6

8.7

8.7

8.8

8.7

8.5

Aug

8.5

8.6

8.8

8.9

8.7

8.6

8.7

8.6

8.5

8.4

8.4

8.4

8.4

8.4

8.5

8.6

8.5

8.6

8.5

8.5

8.6

8.7

8.6

8.7

8.6

8.5

8.5

8.4

8.4

8.4

8.6

Sep

8.5

8.5

8.7

8.9

9.0

9.1

9.0

8.8

8.9

8.9

9.0

9.1

9.1

9.1

9.0

9.0

9.1

9.0

8.9

9.0

9.0

8.8

8.9

8.8

8.7

8.8

8.9

9.0

9.0

8.9

Oct

9.0

9.0

9.0

9.1

9.1

9.3

9.2

9.1

9.2

-9.3

9.3

9.1

9.2

9.0

8.9

9.0

9.0

9.1

9.2

9.1

9.0

8.9

8.8

8.8

8.7

8.6

8.5

8.5

8.5

8.6

8.8

Nov

8.9

9.0

9.0

9.1

9.1

9.1

9.2

9.2

9.1

9.0

8.9

8.8

8.8

8.7

8.6

8.7

8.7

8.5

8.5

8.5

8.6

8.5

8.6

8.6

8.7

8.7

8.0

8.8

8.8

8.8

Dec

8.7

8.6

8.6

8.5

8.3

8.2

8.2

8.1

8.2

8.1

8.2

8.1

8.2

8.1

8.1

8.2

8.3

8.3

8.2

8.3

8.3

8.2

8.3

8.3

8.2

8.2

8.3

8.2

8.2

8.2

8.2

TABLES 161
Table 12i. Mean daily pH in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar Rapids, Iowa, April 

1996 through March 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

8.2

8.1

8.2

8.2

--

--

--

--

8.1

8.1

--

8.0

--

-

--

--

7.9

--

7.8

7.8

--

--

-

7.8

--

7.8

--

-

7.9

7.8

7.9

Feb Mar

7.9 8.2

8.3

8.0 8.3

8.3

8.3

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

7.7 8.4

8.3

8.3

8.3

8.3

8.2

8.0 8.2

8.1 8.1

8.1 8.1

8.1 8.1

8.2 8.1

8.1

8.1

7.8

Apr

7.7

7.7

7.8

7.9

7.9

7.9

7.9

7.9

8.0

8.0

8.0

8.0

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.3

8.3

8.3

May

8.3

8.3

8.3

8.4

8.4

8.4

8.3

8.4

8.4

8.4

8.3

8.3

8.2

8.2

8.2

8.3

8.2

8.2

8.1

8.1

8.2

8.2

8.3

8.2

8.3

8.3

8.0

7.9

7.9

7.8

7.8

Jun

1998

7.8

7.9

8.0

8.1

8.2

8.2

8.3

8.3

8.2

8.0

7.9

7.7

7.5

7.5

7.4

7.5

7.6

7.7

7.6

7.4

7.3

7.5

7.7

7.7

7.7

7.7

7.7

7.7

7.8

7.8

Jul

7.8

7.8

7.8

7.8

7.9

7.9

8.0

8.0

8.0

8.1

8.1

8.2

8.3

8.3

8.4

8.5

8.6

8.6

8.4

8.4

8.3

8.3

8.4

8.3

8.2

8.3

8.3

8.3

8.3

8.3

8.3

Aug Sep

8.3

8.3

8.3

8.2

8.0

8.0

7.9

8.1

8.2

8.2

8.3

8.4

8.5

8.3

8.2

8.2

--

--

--

--

--

--

8.5

8.4

8.3

8.3

8.2

8.1

8.0

7.9

_.

Oct

7.9

7.9

8.0

8.1

7.9

7.9

8.0

8.1

8.2

8.2

8.2

8.3

8.3

8.3

8.3

8.4

8.3

8.0

8.0

8.0

8.0

8.1

8.2

8.2

8.1

8.1

8.1

8.1

8.1

8.1

8.1

Nov

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.2

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

Dec

8.2

8.3

8.3

8.3

8.3

8.3

8.3

8.4

8.4

8.4

8.4

8.4

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.2

8.2

8.1

8.2

8.1

8.1

8.1

8.1

8.1

1 62 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 12i. Mean daily pH in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar Rapids, Iowa, April 

1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

8.0

8.0

8.0

7.9

7.9

7.9

7.9

7.8

7.8

7.8

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.9

7.9

7.9

7.9

8.0

8.0

Feb

8.0

8.0

8.0

8.0

8.0

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

--

--

--

Mar Apr May Jun Jul

1999

--

8.1

8.1

8.0

8.0

8.0

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

8.2

8.1

8.0

8.1

8.1

8.1

8.2

8.3

8.5

8.5

8.5

8.5

8.5

Aug Sep Oct Nov Dec

--

--

--

--

--

-

--

--

--

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

..

--

--

--

TABLES 163
Table 13a. Mean daily dissolved-oxygen concentration in ground water at site CRM-2 (map ID #2), West Well Field, Cedar 

Rapids, Iowa, April 1996 through June 1997

[Dissoved oxygen in milligrams per liter; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1996

8.4 8.1

8.3 8.0

8.3 8.0

8.3 7.7

8.2 7.7

8.2 7.8

8.2 8.0

8.1 8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.2

82

8.3

8.3

8.3

8.3

8.7

9.3

--

82

7.5

7.5

8.8

9.3

7.9

8.1

..

Aug Sep Oct Nov Dec

--

--

--

..

3.9

4.7

4.7

4.7

4.7

4.7

4.1

3.0

4.5

4.6

4.8

4.8

4.8

4.7

4.7

4.7

4.7

4.8

4.8

4.8

4.8

4.8

4.7

4.8

4.7

4.1

2.2

164 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13a. Mean daily dissolved-oxygen concentration in ground water at site CRM-2 (map ID #2), West Well Field, 

Cedar Rapids, Iowa, April 1996 through June 1997-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

2.0

2.6

2.6

3.5

3.8

3.8

3.9

3.9

3.8

3.8

3.1

3.1

3.3

3.7

3.8

3.8

3.8

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.0

3.8

3.8

4.0

4.0

3.9

Feb

3.9

4.0

3.9

3.9

3.9

3.9

3.0

2.6

1.9

1.9

2.0

2.2

2.3

2.3

2.4

2.3

2.4

2.3

2.3

2.5

3.1

3.8

4.2

4.2

2.6

2.5

2.7

2.6

--

--

--

Mar

2.4

2.3

2.2

2.1

1.9

1.9

1.9

1.8

2.3

2.1

2.7

3.3

3.5

3.1

2.7

2.4

2.9

3.9

3.3

4.2

4.2

4.2

4.3

4.3

4.3

4.3

4.3

4.3

4.3

--

--

Apr

--

-

--

--

0.6

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

--

May Jun Jul

1997

1.0 1.1

1.0 1.1

1.0 1.1

1.0 1.1

1.0 1.1

1.0 1.1

1.0 1.1

1.0 1.1

1.0 1.1

1.1

1.1

1.1

--

--

--

--

--

--

--

--

--

--

1.1

1.2

1.1

1.1

1.1

1.1

1.1

1.2

1.1

Aug Sep Oct Nov Dec

--

--

..

--

--

--

--

--

-

--

-

-

--

--

--

--

--

--

--

--

--

--

..

--

--

--

--

--

-

--

--

TABLES 165
Table 13b. Mean daily dissolved-oxygen concentration in ground water at site CRM-12 (map ID #10), East Well Field, 

Cedar Rapids, Iowa, April 1996 through July 1997

[Dissolved oxygen in milligrams per liter; , value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb Mar Apr May Jun

1996

2.7 2.8

2.7 2.8

2.7 2.8

2.7 2.8

2.7 2.9

2.7 2.9

2.7 2.9

2.7 3.0

2.7

2.7

2.7

2.7

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

3.0

2.7

2.4

2.7

2.8

2.8

2.7 -- 1.9

2.7 -- 3.2

2.8 -- 4.0

_

Jul

4.1

4.2

4.2

4.2

4.2

4.2

4.2

4.2

4.1

4.1

4.0

4.0

4.0

3.9

3.9

3.9

3.9

3.9

3.9

3.9

3.8

3.8

3.7

3.7

3.7

3.7

3.6

3.7

3.7

2.8

1.9

Aug

3.6

4.0

4.0

4.0

4.0

4.0

3.9

3.9

3.9

3.9

3.8

3.7

3.7

3.6

3.5

3.5

3.5

3.4

3.4

3.4

3.4

3.5

3.5

3.5

3.5

3.3

3.5

4.3

4.2

4.0

3.9

Sep

3.7

3.6

3.6

3.5

3.5

3.4

3.3

3.3

3.3

3.3

3.2

3.2

3.8

1.5

1.6

2.5

3.1

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.2

3.2

3.2

3.2

3.2

._

Oct

3.2

3.2

3.2

3.2

3.2

3.2

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.2

3.2

3.2

3.2

3.2

3.3

3.3

3.3

3.3

3.3

3.3

3.3

1.4

Nov

1.5

2.0

2.8

2.9

3.0

3.0

3.1

3.1

3.2

3.2

3.2

3.1

3.1

3.1

3.1

3.3

3.3

3.3

3.4

3.4

3.5

3.4

3.4

3.4

3.3

3.4

3.4

3.3

3.3

3.4

Dec

3.4

3.3

3.0

2.1

1.8

2.2

3.1

3.4

3.5

3.6

3.8

2.2

3.2

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.4

3.5

3.5

3.4

3.7

3.1

166 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13b. Mean daily dissolved-oxygen concentration in ground water at site CRM-12 (map ID #10), East Well Field, 

Cedar Rapids, Iowa, April 1996 through July 1997--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

1.2

2.6

3.5

3.5

3.6

3.9

3.9

3.8

3.7

3.7

3.6

3.6

3.6

3.7

3.6

3.7

3.7

3.7

3.7

3.7

3.6

3.7

3.7

3.6

3.7

3.9

3.9

3.9

3.8

3.8

3.8

Feb

3.8

3.8

3.8

3.7

3.8

3.8

4.8

2.6

3.8

3.8

3.8

3.7

3.7

3.8

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.0

4.0

4.0

4.0

4.0

4.1

-

-

-

Mar

4.1

4.1

4.1

4.1

4.1

4.0

4.1

4.1

4.0

4.0

4.0

4.0

4.0

3.9

3.9

3.9

4.0

4.2

4.2

4.2

4.2

4.2

4.2

4.3

4.2

4.3

4.3

4.3

4.2

--

--

Apr

--

--

--

--

3.3

3.9

4.0

4.1

4.1

4.2

4.1

4.1

4.1

4.1

4.2

4.2

4.4

4.4

4.5

4.5

4.6

4.5

4.6

4.5

4.5

4.5

4.5

4.5

4.5

4.5

--

May

4.5

4.5

4.5

4.4

4.4

4.4

4.5

4.5

4.6

-

--

--

--

--

--

--

--

--

--

--

--

--

3.2

3.9

4.0

4.1

4.0

4.0

4.0

3.7

3.8

Jun Jul Aug Sep Oct

1997

4.0 4.6

3.9 4.6

3.9 4.6

3.9 4.6

3.9 4.8

4.1 4.7

4.3 4.7

4.5 4.7

4.6 4.8

4.6 4.8

4.6

4.7

5.3

3.9

4.7

4.7

4.7

4.7

4.7

4.8

4.8

4.8

4.9

5.0

4.7

4.3

4.6

4.6

4.6

4.6

--

Nov Dec

..

--

..

--

..

--

--

--

..

--

..

--

--

--

--

--

--

--

--

--

..

--

--

--

--

..

--

--

--

-

TABLES 167
Table 13c. Mean daily dissolved-oxygen concentration in ground water at site CRM-20 (map ID #17), Northwest Well 

Field, Cedar Rapids, Iowa, February 1998 through March 1999

[Dissolved oxygen in milligrams per liter, , value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

--

--

--

--

--

--

--

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.2

0.2

0.2

0.2

0.2

0.1

--

--

..

Mar

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Apr

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

-.

May

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Jun

1998

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Jul

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Aug Sep

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

--

--

--

--

--

--

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Oct

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Nov

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Dec

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.2

0.3

0.5

0.7

0.9

168 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13c. Mean daily dissolved-oxygen concentration in ground water at site CRM-20 (map ID #17), Northwest Well 

Field, Cedar Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

1.3

2.0

2.8

3.5

3.9

5.2

6.3

7.0

7.3

7.3

7.4

7.4

7.3

6.8

7.1

7.3

7.3

7.1

7.3

7.1

6.8

6.2

5.9

5.8

5.8

6.0

6.1

6.0

6.2

6.4

6.4

Feb

6.4

6.4

6.5

6.6

6.6

6.6

6.6

6.7

6.9

7.2

7.6

7.9

8.0

7.9

7.8

7.8

7.9

8.0

8.0

7.7

7.5

7.4

7.2

7.1

7.0

7.0

6.8

6.7

--

--

-

Mar Apr May Jun Jul

1999

6.8

7.2

7.5

7.7

7.9

8.1

8.3

8.5

8.6

8.6

8.3

8.0

7.9

7.7

7.6

7.6

7.5

7.7

8.0

8.3

8.8

8.8

8.3

7.8

7.3

6.9

6.3

5.8

5.1

4.9

4.8

Aug Sep Oct Nov Dec

-

--

--

--

--

-

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

-

--

-

--

TABLES 169
Table 13d. Mean daily dissolved-oxygen concentration in ground water at site CRM-21 (map ID #18), Northwest Well 

Field, Cedar Rapids, Iowa, February 1998 through March 1999

[Dissolved oxygen in milligrams per liter; --, value not measured, not recorded, or rejected after data review]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

--

--

--

--

--

--

--

--

0.8

0.7

0.6

0.5

0.6

0.5

0.5

0.5

0.5

0.4

0.3

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

--

--

_

Mar

0.1

0.1

0.1

0.3

0.2

0.1

0.1

0.1

0.1

0.2

0.1

0.2

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.3

0.2

0.2

0.2

0.1

0.1

0.1

3.5

Apr

7.9

8.3

8.6

9.0

9.3

9.3

9.0

8.7

8.4

8.6

9.1

9.2

8.8

9.8

11.5

10.9

10.0

8.8

7.4

6.0

4.4

2.7

1.3

0.5

0.2

0.1

0.1

0.1

0.1

0.8

May

4.1

4.8

3.7

1.7

3.1

4.4

4.6

4.9

5.3

5.5

5.5

5.5

5.2

4.5

3.4

2.5

2.0

1.9

1.7

1.5

1.1

0.7

0.4

0.2

0.2

0.4

1.4

2.2

2.1

1.1

0.2

Jun

1998

0.1

0.1

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

1.0

6.0

5.7

5.5

5.5

5.5

3.7

._

Jul

0.6

1.2

6.0

5.8

4.1

2.1

0.7

0.1

0.0

0.0

0.0

0.0

0.1

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.3

0.6

0.7

0.7

0.9

0.7

0.5

Aug Sep

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

--

--

--

--

--

-

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

-_

Oct

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.3

0.6

0.8

0.3

0.0

0.0

0.1

0.1

0.1

Nov

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.3

0.4

0.4

0.3

0.2

0.2

..

Dec

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.4

0.8

1.2

1.7

2.2

2.6

2.9

3.0

2.8

2.3

1.8

1.5

1.4

1.3

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.5

170 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13d. Mean daily dissolved-oxygen concentration in ground water at site CRM-21 (map ID #18), Northwest Well 

Field, Cedar Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

0.5

0.5

0.4

0.4

0.4

0.7

1.1

1.3

1.4

1.4

1.4

1.4

1.3

1.3

1.6

1.8

1.9

2.1

2.3

2.1

1.7

1.2

0.9

0.7

0.5

0.4

0.3

0.3

0.3

0.2

0.2

Feb

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

1.7

4.8

7.0

8.8

10.2

11.2

11.9

12.4

12.6

12.5

--

--

--

Mar Apr May Jun Jul

1999

12.1

11.9

11.5

11.0

9.5

7.3

4.3

2.7

2.4

2.1

2.0

2.5

2.8

3.0

2.9

2.7

2.4

1.9

1.5

1.2

1.0

0.9

0.8

0.8

0.8

0.8

0.6

0.6

0.6

0.6

0.5

Aug Sep Oct Nov Dec

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

..

--

--

--

--

--

--

..

..

--

--

--

--

--

--

TABLES 171
Table 13e. Mean daily dissolved-oxygen concentration in ground water at site CRM-22 (map ID #19), Seminole Well 

Field, Cedar Rapids, Iowa, February 1998 through March 1999

[Dissolved oxygen in milligrams per liter; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

--

--

-

--

--

--

--

0.8

0.7

0.6

0.5

0.6

0.5

0.5

0.5

0.5

0.4

0.3

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

--

--

_

Mar

0.1

0.1

0.1

0.3

0.2

0.1

0.1

0.1

0.1

0.2

0.1

0.2

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.3

0.2

0.2

0.2

0.1

0.1

0.1

3.5

Apr

7.9

8.3

8.6

9.0

9.3

9.3

9.0

8.7

8.4

8.6

9.1

9.2

8.8

6.8

3.2

2.3

1.5

1.0

1.0

1.2

0.5

0.4

0.5

9.5

9.1

7.0

4.9

3.6

2.4

1.2

._

May

0.4

0.1 ,

0.1

0.3

0.4

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.7

0.5

0.1

0.1

0.1

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.1

0.0

Jun Jul

1998

0.0

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

--

--

--

--

-.

--

--

Aug Sep Oct

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1 0.1

0.1 0.0

0.0 0,0

0.0 0.0

0.0 0.0

0.0 0.0

0.0 0.0

0.0 0.0

0.0

Nov

0.0

0.1

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.8

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Dec

0.1

0.1

0.1

0.1

0.1

0.0

0.0

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.0

0.0

0.1

0.5

1.5

1.6

2.2

172 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13e. Mean daily dissolved-oxygen concentration in ground water at site CRM-22 (map ID #19), Seminole Well 

Field, Cedar Rapids, Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

2.8

3.3

3.7

4.0

4.3

4.6

4.7

5.3

6.0

6.6

7.3

7.2

7.2

7.4

7.3

6.9

6.5

6.4

6.3

6.3

6.3

6.3

6.2

6.2

6.2

6.3

6.4

6.3

6.5

6.5

6.5

Feb

6.6

6.6

6.7

6.7

6.8

6.8

6.8

6.8

6.9

7.0

7.2

7.3

7.5

7.5

7.5

7.4

6.9

6.7

6.4

6.3

6.1

5.8

5.8

6.0

6.4

6.9

7.3

8.0

--

-

--

Mar Apr May Jun Jul

1999

8.6

8.0

8.3

8.5

8.6

8.7

8.8

8.9

8.9

8.9

8.7

8.4

8.2

8.1

7.9

7.7

7.7

7.9

8.0

7.6

7.5

7.5

7.4

7.4

7.2

7.2

7.5

7.4

6.7

6.5

6.4

Aug Sep Oct Nov Dec

..

--

--

--

-

--

--

--

-

--

--

--

--

--

--

--

..

--

--

--

--

-

-

--

--

--

--

--

TABLES 173
Table 13f. Mean daily dissolved-oxygen concentration in ground water at site CRM-23 (map ID #20), Seminole Well Field, 

Cedar Rapids, Iowa, February 1998 through March 1999

[Dissolved oxygen in milligrams per liter; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

--

--

--

--

--

--

--

0.4

0.2

0.4

0.6

0.5

0.4

0.3

0.3

0.3

0.2

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

--

--

..

Mar

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.0

0.1

0.1

0.1

0.1

0.1

0.1

0.2

--

--

--

--

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

Apr

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

May

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Jun

1998

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

3.7

6.0

5.8

5.7

5.9

4.7

Jul

1.8

5.0

5.8

3.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Aug Sep

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

..

--

--

--

--

--

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Oct

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Nov

0.1

0.1

0.1

0.2

0.2

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.3

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.2

0.2

0.2

0.2

Dec

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.4

0.3

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.3

0.3

0.2

0.2

0.2

0.2

0.2

0.2

0.3

174 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13f. Mean daily dissolved-oxygen concentration in ground water at site CRM-23 (map ID #20), Seminole Well Field, 

Cedar Rapids, Iowa, February 1998 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

0.4

0.3

0.2

0.2

0.2

0.2

0.2

0.2

0.4

0.3

0.2

0.2

0.2

0.2

0.2

0.2

0.1

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

Feb

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

--

--

--

Mar Apr May Jun Jul

1999

0.2

0.4

0.2

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

0.1

Aug Sep Oct Nov Dec

-

..

--

--

--

--

..

--

..

--

--

--

--

--

--

--

--

--

--

--

--

-

--

-

-

--

TABLES 175
Table 13g. Mean daily dissolved-oxygen concentration in the Cedar River at site SW-2 (map ID #32), Seminole Well 

Field, Cedar Rapids, Iowa, April 1996 through March 1999

[Dissolved oxygen in milligrams per liter; --, value not measured, not recorded, or rejected after data review]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr

10.9

10.7

10.2

10.0

10.3

10.2

10.4

10.4

10.3

9.9

9.7

9.1

9.7

10.1

11.4

12.3

12.3

10.8

10.6

10.2

11.8

12.0

12.3

11.2

8.9

8.9

9.8

8.7

7.3

8.5

_

May Jun Jul

1996

7.6 - 7.0

5.6 -- 7.3

3.8 -- 7.3

2.4 -- 7.5

2.1 -- 8.3

1.7 -- 8.9

9.3

9.2

9.3

10.2

10.9

10.3

10.6

10.2

10.4

9.9

7.7

8.9

8.7

7.5

7.8

8.6

10.0

10.7

10.6

10.9

9.8

7.7 10.1

7.6 11.2

6.8 11.8

12.6

Aug

--

--

-

9.8

11.4

--

-

--

10.7

9.7

9.8

10.7

10.8

10.8

10.5

10.8

10.9

8.9

8.4

10.0

--

9.9

--

--

--

--

--

-

--

--

11.3

Sep

10.5

11.1

--

--

9.4

7.1

6.2

5.4

5.8

6.7

8.4

11.3

--

--

--

--

-

12.7

11.7

10.4

10.0

10.5

8.1

8.5

7.1

6.3

8.1

9.2

8.9

9.7

Oct

8.7

7.2

7.3

7.3

7.7

7.5

6.7

8.2

7.8

8.5

9.4

9.1

8.3

7.1

7.0

7.1

5.6

6.5

7.5

9.3

9.6

9.3

10.7

8.7

8.5

8.8

9.0

10.0

12.0

12.0

12.2

Nov

13.2

13.7

13.6

12.8

12.1

11.5

11.4

11.7

12.3

13.1

14.0

14.6

14.7

14.7

14.8

13.1

11.5

12.4

13.0

13.1

13.7

14.0

13.9

13.8

14.5

14.6

15.1

14.8

14.5

14.3

Dec

14.2

14.3

15.5

17.4

17.1

17.0

16.8

16.7

16.7

16.8

16.7

16.3

16.1

16.1

15.9

16.1

16.5

16.5

16.4

16.2

15.6

15.3

15.4

15.6

15.5

15.3

15.2

14.8

14.6

14.4

14.4

176 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13g. Mean daily dissolved-oxygen concentration in the Cedar River at site SW-2 (map ID #32), Seminole Well 

Field, Cedar Rapids, Iowa, April 1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

14.4

14.2

14.3

14.1

14.2

14.3

14.4

13.9

13.5

13.3

13.3

13.5

13.3

13.2

13.2

13.1

13.1

13.0

12.8

12.8

12.8

12.8

13.2

13.0

12.8

12.8

12.5

12.3

12.1

12.1

12.0

Feb

12.0

12.3

12.3

12.5

12.7

12.5

12.2

12.3

12.5

12.5

12.7

12.7

12.8

12.9

12.9

12.8

12.9

13.2

14.1

14.1

14.1

13.5

12.7

11.9

11.4

11.4

12.1

12.6

--

--

__

Mar Apr

13.2

13.5

13.6

--

9.8

10.1

11.3

11.8

12.2

12.4

12.7

13.0

12.7

12.1

11.6

11.5

11.6

11.5

11.5

11.2

11.1

11.2

11.0

11.1

11.5

11.2

11.2

11.3

11.5

9.1

__

May

9.7

8.6

8.7

9.0

8.9

8.8

8.3

8.1

8.3

8.7

8.7

9.0

9.3

9.5

10.3

10.4

10.2

9.8

9.1

9.5

10.0

11.0

12.2

11.1

9.9

9.5

10.2

9.5

9.6

9.9

10.0

Jun

1997

10.4

11.1

10.9

11.6

10.5

10.2

11.2

11.3

11.5

11.6

11.0

10.4

11.8

12.5

11.7

8.2

7.8

7.9

7.9

7.7

6.4

6.3

5.2

5.4

5.8

5.9

6.1

6.1

6.3

6.2

_.

Jul

6.4

6.1

6.5

7.1

7.5

7.7

7.9

7.9

7.7

7.9

8.5

8.2

7.2

7.3

8.0

7.0

5.8

5.9

6.2

6.3

6.4

6.2

6.4

7.0

7.6

7.5

6.9

7.5

8.2

7.9

7.2

Aug

7.4

7.9

7.7

7.7

8.6

8.2

9.4

10.5

10.1

9.6

8.1

7.3

8.5

8.3

9.7

9.9

8.1

8.2

8.2

9.0

10.1

10.3

9.5

9.0

7.8

7.7

7.6

8.7

8.0

7.5

7.9

Sep

7.6

7.4

9.7

10.9

10.7

11.2

9.2

6.9

7.8

9.1

9.8

9.8

7.9

9.2

10.3

9.2

9.4

9.3

7.4

7.8

8.9

8.0

8.9

9.1

9.9

8.8

8.4

7.7

8.0

8.9

Oct

8.4

8.2

7.1

7.0

8.3

9.0

9.5

8.6

9.3

9.3

8.9

6.5

6.4

7.7

7.7

8.0

7.8

7.8

8.1

8.5

8.8

9.2

8.8

8.1

8.2

9.4

10.7

11.2

11.1

10.4

9.9

Nov

9.6

10.0

10.7

11.1

11.2

11.0

10.7

10.3

10.2

10.7

11.4

13.3

14.6

14.6

14.9

15.7

15.9

15.7

15.5

15.0

14.6

14.7

15.4

15.9

15.4

14.4

14.2

13.8

13.0

12.8

Dec

13.4

13.4

13.4

13.1

13.6

14.1

14.0

14.0

13.8

13.5

13.2

13.4

13.7

13.7

13.7

--

14.4

14.1

13.8

13.6

14.0

14.2

14.0

13.8

14.1

14.0

13.7

13.2

12.5

12.0

12.7

TABLES 177
Table 13g. Mean daily dissolved-oxygen concentration in the Cedar River at site SW-2 (map ID #32), Seminole Well 

Field, Cedar Rapids, Iowa, April 1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

13.4

13.3

12.9

12.7

12.8

12.7

12.9

13.1

13.4

13.6

13.8

13.6

13.4

13.5

13.1

12.9

12.7

12.5

12.4

12.2

12.2

11.9

11.7

11.4

11.3

11.5

11.7

11.9

12.1

12.4

12.5

Feb

12.6

12.8

12.8

12.9

13.1

13.2

13.3

13.3

13.2

--

--

--

--

-

12.1

11.4

11.3

11.4

11.3

11.4

11.5

11.7

7.3

3.6

3.3

2.9

3.1

3.5

--

-

..

Mar

3.5

3.5

3.3

3.5

3.6

3.5

3.3

2.9

3.1

3.3

3.5

3.9

3.7

3.1

3.1

3.1

2.7

2.6

3.0

3.2

3.4

3.5

3.8

4.4

4.2

4.3

4.5

4.7

4.7

4.8

7.0

Apr

8.0

9.0

9.2

9.0

8.7

8.2

7.4

6.8

6.5

6.7

6.6

6.3

5.9

6.0

5.8

5.9

6.4

6.5

6.7

6.9

7.1

7.0

6.9

6.6

6.2

6.1

6.2

5.9

5.4

5.0

May

4.7

4.6

4.6

4.5

4.4

4.3

4.2

4.4

4.5

4.5

4.3

4.1

4.4

4.3

4.1

4.3

4.3

4.2

4.2

4.2

4.0

3.8

3.7

3.8

4.0

4.4

4.9

4.9

5.3

5.2

5.3

Jun

1998

5.1

4.7

4.7

4.5

4.4

4.5

4.4

4.2

4.1

5.0

5.2

6.3

7.4

8.0

8.7

8.2

7.5

6.9

7.2

7.4

8.0

9.1

9.4

9.4

10.3

10.5

10.2

10.3

9.9

9.3

Jul Aug Sep

9.2 3.3

9.7 3.1

10.1 2.9

10.0 3.0

8.9 3.0

7.4 3.2

6.5 3.4

6.2 3.5

6.0

5.7

5.4

5.1

4.9

4.7

4.4

4.3

4.0

3.8

3.6

3.6

3.6

3.6

3.6 - 3.1

3.3 -- 2.9

3.4 - 2.8

3.3 -- 2.8

3,2 - 3.1

3.2 -- 3.2

3.2 -- 3.0

3.3 -- 3.1

3.4

Oct

3.2

3.0

2.8

2.9

2.8

3.1

3.3

3.5

3.5

3.3

3.3

3.3

3.2

3.1

3.0

3.1

3.2

4.5

4.8

5.3

5.3

4.0

4.5

4.0

3.8

3.7

3.6

3.5

3.4

4.1

4.4

Nov

4.5

4.3

4.1

3.9

3.7

3.6

3.6

3.3

3.0

2.3

3.5

3.9

3.7

3.5

3.8

3.5

3.8

3.5

3.5

3.5

3.4

3.0

3.5

3.9

3.6

3.7

3.7

3.6

3.4

3.7

Dec

3.9

3.6

3.5

3.6

3.4

3.4

3.6

3.6

3.7

3.8

3.6

3.5

3.4

3.4

3.4

3.2

3.2

3.1

4.0

4.1

4.4

5.3

4.7

4.6

4.7

4.8

4.6

4.5

4.3

4.3

4.0

178 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 13g. Mean daily dissolved-oxygen concentration in the Cedar River at site SW-2 (map ID #32), Seminole Well 

Field, Cedar Rapids, Iowa, April 1996 through March 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

4.2

3.8

3.9

4.2

4.0

4.0

4.3

4.0

4.2

4.0

3.8

3.8

4.2

4.2

3.8

3.8

3.6

3.7

4.0

4.0

3.8

3.7

3.9

4.3

4.6

4.3

4.0

4.4

4.7

4.7

4.5

Feb

4.1

4.1

4.1

4.9

4.7

4.7

4.6

4.6

5.0

4.7

4.7

5.2

5.6

5.1

4.7

4.9

5.0

5.0

5.0

5.1

5.2

4.9

4.6

4.5

4.4

4.2

3.9

4.0

--

--

--

Mar Apr May Jun Jul

1999

4.0

4.1

4.4

4.3

4.2

4.5

4.7

4.2

4.0

4.4

4.3

4.4

4.3

4.3

4.2

3.9

4.1

4.6

4.9

5.0

5.0

4.9

4.7

4.8

4.9

4.6

4.6

4.4

4.7

4.7

4.3

Aug Sep Oct Nov Dec

--

--

--

--

--

--

--

..

-

--

-

-

--

--

--

--

--

--

..

-

-

--

--

--

..

--

--

--

-

--

--

TABLES 179
Table 14a. Mean daily ground-water temperature at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun

1996

4.6 2.8

4.4 2.8

4.2 2.9

4.0 3.0

3.8 3.1

3.7 3.0

3.5 3.0

3.3 3.1

3.2

3.1

3.0

2.9

2.8

2.7

2.7

2.6

2.7

2.7

2.7

2.8

2.8

2.7

3.4

2.8

2.8

2.7

2.7

2.7 - 3.8

2.6 -- 3.8

2.7 -- 3.9

Jul

3.9

4.0

4.0

4.1

4.1

4.2

4.3

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.8

4.6

4.5

4.5

4.5

4.6

4.6

4.7

4.7

4.8

4.8

4.8

4.8

4.9

4.9

5.2

5.1

Aug

5.2

5.3

5.4

5.4

5.5

5.6

5.5

5.4

5.3

5.2

5.2

5.2

5.2

5.2

5.2

5.3

5.3

5.4

5.4

5.4

5.5

5.5

5.5

5.6

5.6

--

--

-

--

--

Sep

--

--

--

--

--

--

-

--

--

--

--

-

--

6.6

6.7

6.7

6.8

6.9

7.0

7.0

7.1

7.1

7.2

7.2

7.3

7.3

7.4

--

--

--

Oct Nov Dec

--

--

--

13.2

13.2

13.2

13.3

13.4

13.6

13.7

13.2

13.8

13.9

13.9

14.0

14.1

14.4

14.6

14.6

14.7

14.7

14.8

14.8

14.8

14.8

14.8

14.7

14.7

14.7

14.7

14.9

180 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14a. Mean daily ground-water temperature at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

15.1

15.1

15.0

15.0

15.0

15.0

14.9

14.9

14.8

14.8

14.8

14.8

14.7

14.7

14.6

14.6

14.5

14.4

14.3

14.2

14.1

14.1

14.1

14.0

13.9

13.9

14.0

14.1

14.1

14.1

14.1

Feb

14.0

14.0

14.0

13.9

13.8

13.8

13.5

13.3

12.9

12.5

12.4

12.7

12.9

13.1

13.3

13.5

13.5

13.6

13.8

13.9

13.9

14.0

14.0

14.0

14.0

14.0

14.0

13.9

--

--

Mar

13.9

13.9

13.8

13.8

13.7

13.7

13.7

13.6

13.6

13.6

13.5

13.5

13.5

13.4

13.4

13.3

13.3

13.2

13.2

13.1

12.9

12.7

12.5

12.4

12.3

12.2

12.1

12.0

11.9

--

..

Apr May Jun Jul

1997

7.8

7.5

7.2

7.0

6.9

6.7

6.6

6.5

6.5

6.6

6.8

6.9

--

--

--

--

--

--

--

--

--

--

9.9

9.7 -- 8.2

9.6 -- 8.2

9.4 -- 8.3

9.3 -- 8.3

9.1 -- 8.2

8.8 -- 8.2

8.6 -- 8.2

8.2 -- 8.2

Aug

8.2

8.2

8.2

8.2

8.2

8.1

8.1

8.1

8.1

8.1

8.1

8.1

8.0

8.0

8.1

8.4

8.4

8.4

8.7

8.7

8.6

8.4

8.4

8.3

8.2

8.2

8.2

8.3

8.5

8.4

8.5

Sep

8.5

8.5

8.4

8.4

8.5

8.5

8.5

8.5

8.5

8.6

8.6

8.6

8.7

8.7

8.8

8.8

8.8

8.7

8.8

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.6

8.6

8.7

Oct

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.6

8.6

8.6

8.6

8.6

8.6

8.6

8.6

8.6

8.7

8.7

8.7

8.9

9.0

9.0

9.4

9.6

10.0

10.2

10.5

Nov

10.7

10.8

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

11.0

11.0

11.0

11.0

11.0

11.0

Dec

11.0

11.0

11.0

11.0

11.0

11.0

11.1

11.1

11.1

11.1

11.1

11.2

11.2

11.3

11.3

11.4

11.5

11.6

11.8

11.9

11.9

11.9

11.9

11.9

11.9

11.9

11.9

11.9

12.0

12.1

12.1

TABLES 181
Table 14a. Mean daily ground-water temperature at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

12.2

12.2

12.3

12.4

12.4

12.5

12.6

12.6

12.7

12.8

12.7

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.1

11.9

11.8

11.8

11.7

11.7

Feb

11.6

11.6

11.4

11.2

11.2

11.1

11.0

10.9

10.9

10.8

10.7

10.6

10.6

10.5

10.5

10.4

10.4

10.4

10.4

10.4

10.3

10.3

10.2

10.2

10.1

10.1

10.2

10.4

--

--

Mar

10.6

10.7

10.9

10.9

10.8

10.9

10.9

10.8

10.8

10.7

10.5

10.1

9.7

9.5

9.3

9.2

8.9

8.7

8.6

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

Apr

8.6

8.6

8.5

8.4

8.6

8.7

8.7

8.7

8.6

8.6

8.6

8.6

8.5

8.5

8.6

8.5

8.5

8.5

8.5

8.5

8.5

8.4

8.4

8.4

8.4

8.3

8.3

8.3

8.2

8.1

May

8.1

8.0

7.9

7.8

7.7

7.6

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.2

7.2

7.1

7.1

7.0

7.0

6.9

6.9

6.9

6.8

Jun

1998

6.8

6.7

6.7

6.6

6.6

6.5

6.5

6.4

6.4

6.3

6.2

6.2

6.2

6.2

6.2

6.3

6.3

6.4

6.4

6.5

6.4

6.4

6.4

6.4

6.6

6.8

6.8

6.9

7.0

7.0

Jul

7.0

7.0

7.1

7.1

7.2

7.2

7.1

7.0

7.0

6.9

6.8

6.8

6.8

6.8

6.8

6.9

6.9

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.2

7.2

7.2

Aug

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.4

7.4

7.5

7.5

7.6

7.5

7.6

7.6

7.7

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.9

7.9

8.0

Sep

8.1

8.1

8.1

8.2

8.2

8.3

8.3

8.3

8.4

8.4

8.5

8.5

8.6

8.6

8.6

8.5

8.5

8.5

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

8.4

Oct

8.2

8.2

8.1

8.1

8.1

8.2

8 0 .z

8.2

8.2

8.3

8.3

8.3

8.3

8.4

8.4

8.4

8.5

8.5

8.5

8.6

8.6

8.7

8.8

8.8

8.9

8.9

9.0

9.0

9.0

9.1

9.2

Nov

9.2

9.2

9.2

9.2

9.2

9.3

9.3

9.3

9.4

9.4

9.4

9.4

9.5

9.5

9.5

9.6

9.6

9.5

9.5

9.5

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

Dec

9.4

9.4

9.4

9.4

9.4

9.5

9.5

9.5

9.5

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.8

9.8

9.8

9.8

182 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14a. Mean daily ground-water temperature at site CRM-1 (map ID #1), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.8

9.7

9.7

9.7

9.7

9.7

9.7

9.6

9.6

9.6

9.6

9.5

9.5

9.5

9.5

9.5

9.4

9.4

9.4

9.4

9.4

9.4

Feb Mar Apr May Jun Jul

1999

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

--

--

--

Aug Sep Oct Nov Dec

--

--

--

-

--

--

--

--

--

--

--

..

..

--

--

--

--

--

-

..

--

--

--

--

--

--

--

--

--

--

TABLES 183
Table 14b. Mean daily ground-water temperature at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun Jul

1996

15.1 16.7

15.2 16.7

15.3 16.7

15.3 16.7

15.4 16.6

15.5 16.6

15.6 16.5

15.6 16.5

15.6

15.6

15.6

15.6

15.6

15.7

15.7

15.8

15.8

15.8

15.9

15.9

15.9

15.9

16.1

16.2

16.3

16.3

16.4

16.5

16.6

14.1

Aug

14.1

14.0

14.0

13.9

13.9

13.8

13.8

13.7

13.6

13.5

13.4

13.3

13.2

13.2

13.2

13.1

13.1

13.1

13.1

13.1

13.1

13.0

13.0

13.0

13.0

13.0

13.0

12.9

12.8

12.1

11.9

Sep

11.8

11.7

11.6

11.6

11.5

11.5

11.4

11.4

11.3

11.3

11.2

11.2

11.2

11.1

11.1

11.1

11.0

11.0

11.0

11.0

10.9

11.0

11.1

11.1

11.1

11.1

11.1

11.1

11.2

11.2

Oct

11.3

11.4

11.5

11.6

11.5

11.5

11.5

11.5

11.6

11.7

11.7

11.7

11.8

11.8

11.8

11.7

11.7

11.7

11.7

11.7

11.7

11.7

11.8

11.8

11.8

11.9

11.9

12.0

12.0

12.0

12.1

Nov

12.1

12.2

12.2

12.2

12.3

12.3

12.3

12.3

12.4

12.4

12.5

12.5

12.5

12.5

12.5

12.6

12.7

12.7

12.7

12.7

12.8

12.8

12.9

12.9

13.0

12.9

12.9

12.9

12.9

12.9

Dec

12.9

13.0

12.9

13.0

12.9

12.9

12.9

12.9

12.9

12.9

12.8

12.9

12.9

12.9

12.9

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.1

13.1

13.2

13.2

13.2

13.3

184 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14b. Mean daily ground-water temperature at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

13.4

13.5

13.5

13.6

13.5

13.5

13.5

13.5

13.5

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.6

13.7

13.7

13.7

Feb

13.7

13.7

13.7

13.6

13.6

13.6

13.6

13.6

13.5

13.5

13.5

13.5

13.4

13.4

13.4

13.3

13.3

13.3

13.3

13.3

13.2

13.2

13.2

13.2

13.0

13.0

13.0

13.0

--

--

Mar

13.0

13.0

13.0

13.0

12.9

12.9

12.9

12.9

12.8

12.6

12.7

12.6

12.5

12.5

12.4

12.2

12.0

12.1

12.3

12.2

12.6

12.7

12.7

12.6

12.6

12.7

12.7

12.7

12.3

--

..

Apr

--

--

--

--

12.4

12.4

12.5

12.5

12.4

12.4

12.4

12.4

12.4

12.4

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.2

12.2

May

12.2

12.2

12.2

12.2

12.2

12.2

12.2

12.1

12.1

--

--

--

--

--

-

-

-

--

--

--

--

--

11.9

11.9

11.9

11.9

11.9

11.9

11.9

11.9

11.9

Jun

1997

11.9

11.8

11.8

11.8

11.9

11.9

11.9

11.9

11.9

11.9

11.9

11.9

--

--

--

-

-

--

--

--

--

--

--

--

--

--

--

--

--

--

Jul

--

-

-

-

--

--

--

--

--

--

--

-

-

--

11.0

11.0

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.8

10.8

10.8

10.7

Aug

10.7

10.6

10.6

10.5

10.5

10.5

10.5

10.5

10.5

10.6

10.8

11.0

11.3

11.6

12.0

12.5

13.0

13.5

14.0

14.2

15.0

15.6

16.3

16.9

17.4

17.8

18.2

18.6

18.9

19.1

19.3

Sep

19.5

19.7

19.8

19.9

19.9

20.0

20.1

20.2

20.2

20.2

20.3

20.3

20.3

20.4

20.5

20.5

20.6

20.6

20.7

20.7

20.8

20.9

20.9

20.9

20.9

20.8

20.9

20.9

20.9

21.0

Oct

21.0

21.1

21.1

21.1

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.2

21.3

21.3

21.4

21.5

21.5

21.6

21.6

21.7

21.8

21.9

21.9

22.0

Nov

22.0

22.1

22.1

22.1

22.1

21.7

22.1

22.3

22.5

22.5

22.6

22.7

22.8

--

-

--

--

--

--

22.9

22.9

22.9

22.9

22.9

22.9

22.9

22.8

22.8

22.8

22.8

Dec

22.8

22.7

22.7

22.7

22.8

22.8

22.8

22.8

22.8

22.8

22.8

22.8

22.1

22.6

22.6

22.6

22.6

22.5

22.5

22.4

22.4

22.4

22.4

22.4

22.3

22.3

22.3

22.2

22.2

22.2

22.2

TABLES 185
Table 14b. Mean daily ground-water temperature at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

22.1

22.1

22.1

22.1

22.0

22.0

22.0

21.9

21.9

21.9

21.8

21.8

21.8

21.8

21.7

21.7

21.7

21.6

21.6

21.6

21.6

21.6

21.6

21.6

21.5

21.5

21.5

21.4

21.4

21.4

21.4

Feb

21.3

21.3

21.3

21.3

21.3

21.2

21.2

21.2

21.2

21.1

21.1

21.1

21.0

21.0

20.9

20.9

20.9

20.8

20.8

20.7

20.7

20.7

20.6

20.6

20.5

20.5

20.4

20.4

--

--

Mar

20.3

20.3

20.3

20.2

20.2

20.1

20.1

20.0

20.0

20.0

19.9

19.9

19.8

19.8

19.8

19.7

19.7

19.6

19.6

19.6

19.5

19.5

19.5

19.4

19.4

19.4

19.3

19.3

19.3

19.3

19.3

Apr

19.2

19.0

18.7

18.3

17.9

17.5

17.4

17.3

17.2

17.2

17.1

17.0

17.0

17.0

17.0

17.0

17.0

17.0

16.9

16.9

16.8

16.8

16.7

16.6

16.5

16.3

16.1

15.8

15.6

15.3

May

14.9

14.6

14.2

13.8

13.4

13.0

12.6

12.3

12.0

11.7

11.3

11.0

10.6

10.2

9.9

9.6

9.2

8.8

8.4

8.1

7.7

7.4

7.1

6.8

6.5

6.3

6.0

5.8

5.6

5.4

5.2

Jun

1998

5.0

4.8

4.7

4.5

4.5

4.4

4.3

4.2

4.2

4.1

4.1

4.1

4.0

4.0

4.0

4.0

3.9

3.9

3.9

3.9

3.9

4.0

4.0

4.0

4.0

4.1

4.1

4.1

4.2

4.2

Jul

4.3

4.2

4.3

4.3

4.4

4.5

4.5

4.5

4.6

4.6

4.7

4.8

4.9

5.0

5.1

5.3

5.6

5.9

6.2

6.4

6.7

7.0

7.3

7.6

7.9

8.3

8.7

9.0

9.4

9.7

10.1

Aug

10.3

10.6

10.8

11.0

11.3

11.5

11.8

12.1

12.5

12.8

13.2

13.6

13.9

14.3

14.6

14.9

15.1

15.3

15.4

15.7

15.9

16.1

16.4

16.6

16.9

17.1

17.3

17.5

17.7

17.8

18.0

Sep

18.0

18.1

18.2

18.4

18.5

18.7

18.8

19.0

19.1

19.2

19.2

19.3

19.4

19.5

19.7

19.9

20.0

20.2

20.3

20.4

20.6

20.7

20.7

20.8

20.9

21.0

21.1

21.3

21.5

21.6

Oct

21.9

22.1

22.4

22.6

22.9

23.1

23.3

23.5

23.6

23.7

23.8

23.9

24.0

24.1

24.1

24.2

24.2

24.2

24.2

24.3

24.3

24.3

24.4

24.4

24.4

24.4

24.4

24.4

24.4

24.4

24.3

Nov

24.3

24.3

24.3

24.3

24.3

24.3

24.3

24.3

24.3

24.3

24.3

24.2

24.2

24.2

24.1

24.1

24.1

24.0

24.0

23.9

23.9

23.8

23.8

23.7

23.6

23.6

23.5

--

-

--

Dec

--

--

--

--

-

--

--

-

--

--

--

--

--

--

21.8

21.8

21.7

21.6

21.6

21.6

21.5

21.4

21.3

21.2

21.1

20.9

20.8

20.7

20.6

20.5

20.3

186 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14b. Mean daily ground-water temperature at site CRM-2 (map ID #2), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

20.2

20.1

20.0

19.8

19.7

19.6

19.4

19.3

19.1

18.9

18.7

18.5

18.2

18.0

17.8

17.6

17.4

17.1

17.0

16.7

16.6

16.4

16.2

16.1

16.0

15.8

15.7

15.6

15.6

15.5

15.4

Feb Mar Apr May Jun Jul

1999

15.3

15.3

15.2

15.1

15.0

15.0

14.9

14.8

14.8

14.7

14.6

14.6

14.6

14.5

14.5

14.4

14.4

14.3

14.3

14.2

14.2

14.1

14.1

14.1

14.0

13.9

13.9

13.8

--

--

--

Aug Sep Oct Nov Dec

--

--

--

--

--

..

--

--

--

--

..

--

--

--

--

--

..

--

--

--

--

--

--

--

--

..

--

-

--

--

--

TABLES 187
Table 14c. Mean daily ground-water temperature at site CRM-3 (map ID #3), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; , value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 10.8

25 10.8

26 10.8

27 10.8

28 10.8

29 10.8

30 10.8

31 10.8

Feb

10.8

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.8

10.8

10.8

10.8

11.0

11.0

11.0

10.8

10.8

10.8

10.8

10.8

--

--

_

Mar

10.8

10.8

10.8

10.8

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.4

10.4

10.4

10.4

Apr

10.3

10.3

10.3

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

9.9

9.9

9.9

9.9

9.9

9.9

9.9

__

May

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.7

9.7

9.7

9.7

9.7

9.7

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.5

9.5

9.5

Jun

1997

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.3

9.4

9.4

9.3

9.3

9.3

9.2

9.2

9.2

_.

Jul

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.0

8.9

8.9

8.9

8.9

8.9

8.9

8.9

8.9

Aug

8.9

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.7

8.7

8.7

8.7

8.6

8.6

8.6

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.8

8.7

8.7

8.7

8.8

Sep

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.9

8.9

8.9

8.9

8.9

8.9

8.9

8.9

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.1

9.1

9.1

9.1

9.1

9.2

Oct

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.3

9.3

9.3

9.3

9.4

9.4

9.4

9.5

9.5

9.5

9.6

9.6

9.6

9.7

9.7

9.7

9.7

9.7

9.8

9.8

9.8

9.8

9.8

Nov

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.9

9.9

9.9

9.9

9.9

10.0

10.0

10.0

10.0

10.1

10.1

10.1

10.1

10.1

10.1

Dec

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

188 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14c. Mean daily ground-water temperature at site CRM-3 (map ID #3), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.5

10.5

10.5

10.5

10.5

10.5

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.3

10.4

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.2

10.2

10.2

Feb

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

10.1

10.1

10.1

10.1

--

--

..

Mar

10.1

10.1

10.0

10.0

10.0

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.7

9.7

9.7

9.7

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

Apr

9.6

9.7

9.7

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

May

9.5

9.5

9.6

9.5

9.7

9.9

10.0

10.0

10.0

10.0

10.0

10.0

9.9

10.0

10.1

10.0

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.2

10.2

10.2

10.1

10.1

10.0

10.0

10.0

Jun

1998

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.0

10.0

9.9

9.9

9.6

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.2

9.2

9.2

--

--

--

--

--

--

--

--

Jul Aug

-

--

--

--

--

--

--

--

--

--

-

--

--

16.0

16.2

16.5

16.9

17.3

17.5

17.9

18.1

18.4

18.8

19.1

19.4

19.7

19.7

19.8

19.9

20.2

19.8

Sep

20.0

20.2

20.2

20.3

20.3

20.5

20.5

20.5

20.7

20.7

20.8

20.8

20.9

20.9

20.9

21.0

20.9

21.0

21.0

21.0

21.1

21.2

21.2

21.2

21.2

21.1

21.2

21.4

21.7

21.9

Oct

22.1

22.3

22.6

22.7

22.8

22.8

22.8

22.8

22.8

22.8

22.7

22.7

22.7

22.7

22.7

22.7

22.8

22.9

22.9

22.9

22.9

22.8

22.8

23.0

22.7

22.7

22.8

22.9

23.0

23.1

23.2

Nov

23.2

23.3

23.3

23.4

23.4

23.4

23.5

23.5

23.5

23.5

23.5

23.5

23.6

23.6

23.7

23.7

23.7

23.7

23.7

23.7

23.7

23.6

23.6

23.6

23.6

23.5

23.5

23.4

23.3

23.3

Dec

23.2

23.2

--

--

23.1

23.0

23.0

22.9

22.9

22.8

22.8

22.8

22.7

22.7

22.6

22.6

22.6

22.5

22.5

22.5

22.4

22.4

22.3

22.3

22.2

22.2

22.1

22.1

22.1

22.0

22.0

TABLES 189
Table 14c. Mean daily ground-water temperature at site CRM-3 (map ID #3J, Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

22.0

21.9

21.9

21.9

21.8

21.8

21.8

21.7

21.7

21.7

21.7

21.7

21.7

21.6

21.6

21.6

21.6

21.6

21.6

21.5

21.5

21.5

21.5

21.5

21.4

21.4

21.5

21.4

21.4

21.4

21.3

Feb Mar Apr May Jun Jul

1999

21.3

21.3

21.3

21.2

21.2

21.2

21.2

21.2

21.1

21.1

21.0

21.0

21.0

20.9

20.9

20.9

20.8

20.8

20.8

20.7

20.7

20.7

20.6

20.6

20.6

20.6

20.5

20.5

--

--

--

Aug Sep Oct Nov Dec

..

--

--

-

--

-

--

--

..

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

190 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14d. Mean daily ground-water temperature at site CRM-4 (map ID #4), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through June 1998

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 9.4

25 9.6

26 9.8

27 9.9

28 9.9

29 9.9

30 10.0

31 10.0

Feb

10.0

10.0

10.1

10.1

10.0

10.1

10.0

10.1

10.0

10.0

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

--

--

_.

Mar

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.7

9.8

9.7

9.7

9.7

9.6

9.5

9.5

9.4

9.3

9.2

9.2

9.1

9.1

9.1

9.0

9.0

8.9

8.9

8.8

8.8

8.7

8.6

8.6

Apr

8.5

8.5

8.5

8.5

8.4

8.4

8.4

8.4

8.4

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.2

8.2

8.2

8.2

8.2

8.2

8.1

8.1

8.1

8.0

8.0

8.0

8.0

May

8.0

7.9

7.8

7.8

7.7

7.7

7.6

7.6

7.5

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.5

7.2

6.9

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

6.9

6.9

6.9

Jun

1997

6.8

6.8

6.8

6.7

6.7

6.6

6.6

6.6

6.5

6.5

6.5

6.4

6.4

6.4

6.3

6.3

6.3

6.3

6.2

6.1

6.1

6.1

6.0

6.0

6.5

7.1

7.6

8.0

8.3

8.6

Jul

8.9

9.2

9.5

9.9

10.2

10.4

10.7

11.0

11.3

11.6

12.0

12.4

12.8

13.3

13.8

14.3

14.9

15.8

16.6

16.9

17.2

17.4

17.7

17.9

18.7

19.7

19.9

20.1

20.3

20.9

22.5

Aug

22.8

22.9

23.1

24.0

24.7

24.7

24.8

24.8

24.9

24.9

25.1

25.2

25.2

25.2

25.2

25.2

25.1

25.0

25.0

24.9

24.8

24.8

24.7

24.7

24.7

24.7

24.7

24.8

24.7

24.8

24.8

Sep

24.8

24.8

24.8

24.8

24.8

24.7

24.7

24.6

24.5

24.4

24.3

24.2

24.1

23.9

23.7

23.6

23.4

23.3

23.3

23.3

23.2

23.2

23.2

23.2

23.2

23.2

23.2

23.2

23.2

23.2

Oct

23.1

23.0

22.8

22.7

22.6

22.6

22.5

22.4

22.3

22.2

21.9

21.7

21.4

21.1

20.7

20.1

19.3

18.4

17.3

16.1

15.0

14.2

13.4

12.7

12.2

11.8

11.4

10.9

10.5

10.2

10.1

Nov

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

10.3

Dec

10.4

10.4

10.4

10.4

10.4

10.5

10.5

10.5

10.5

10.6

10.6

10.6

10.6

10.6

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.6

10.6

TABLES 191
Table 14d. Mean daily ground-water temperature at site CRM-4 (map ID #4), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through June T998--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.5

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.1

10.1

10.1

10.1

Feb

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.7

9.7

9.6

9.6

9.7

9.6

9.6

--

-

--

Mar

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.5

9.5

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.2

9.2

9.3

Apr

9.3

9.3

9.2

9.2

9.2

9.2

9.2

9.2

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.0

9.0

9.0

9.0

9.0

8.9

8.9

8.9

8.9

8.9

8.9

8.8

8.8

--

May

8.8

8.8

8.7

8.7

8.7

8.7

8.6

8.6

8.6

8.5

8.5

8.4

8.4

8.3

8.3

8.3

8.2

8.2

8.1

8.1

8.1

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

8.0

Jun Jul

1998

8.0

8.1

8.1

8.1

8.2

8.2

8.2

8.3

8.3

8.4

8.5

8.6

8.7

8.9

9.1

9.2

9.4

9.5

9.8

10.0

10.3

10.6

--

--

--

--

--

--

-

--

--

Aug Sep Oct Nov Dec

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

192 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14e. Mean daily ground-water temperature at site CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; , value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 10.2

25 10.3

26 10.3

27 10.3

28 10.4

29 10.4

30 10.4

31 10.4

Feb

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

--

--

..

Mar

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.4

10.4

10.4

10.4

10.3

10.3

10.3

10.3

10.4

10.3

10.2

10.2

10.2

10.1

10.1

10.2

10.2

10.3

10.2

10.2

10.2

10.2

10.1

Apr

10.1

10.1

10.0

9.9

9.8

9.8

9.8

9.7

9.7

9.7

9.7

9.6

9.6

9.6

9.6

9.6

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.4

9.4

9.4

9.3

9.3

9.3

9.3

May

9.3

9.3

9.2

9.2

9.3

9.3

9.3

9.4

9.4

9.3

9.4

9.3

9.3

9.2

9.0

8.9

8.9

8.7

8.4

8.3

8.3

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.1

Jun

1997

8.1

8.1

8.0

7.9

7.8

7.8

7.8

7.8

7.8

7.8

7.8

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.6

7.6

7.7

7.8

8.6

9.8

10.5

11.1

11.4

11.6

Jul

11.8

12.0

12.3

12.5

12.6

12.8

12.8

12.9

13.0

13.2

13.4

13.6

13.8

14.1

14.3

14.6

15.0

15.7

16.4

16.6

16.7

16.9

17.0

17.1

17.8

19.8

20.4

20.8

21.0

21.4

23.0

Aug

24.0

24.3

24.5

25.1

26.0

26.3

26.3

26.4

26.4

26.4

26.5

26.5

26.6

26.6

26.6

26.6

26.6

26.6

26.6

26.5

26.5

26.4

26.4

26.3

26.3

26.2

26.2

26.1

26.1

26.0

26.0

Sep

25.9

25.8

25.7

--

25.3

25.1

25.0

24.9

24.7

24.6

24.4

24.3

24.1

24.0

23.8

23.6

23.5

23.5

23.5

23.6

23.6

23.6

23.7

23.6

23.6

23.6

23.6

23.5

23.5

23.5

Oct

23.5

23.5

23.4

23.3

23.2

23.1

23.1

23.0

22.9

22.8

22.5

22.1

21.6

21.0

20.2

19.3

18.4

17.2

16.0

14.7

13.7

12.9

12.3

11.7

11.3

11.0

10.7

10.4

10.0

9.8

9.7

Nov

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.8

9.8

9.8

9.8

9.8

9.9

9.9

9.9

9.9

9.9

9.9

10.0

10.0

10.0

10.0

10.0

10.1

10.1

10.1

10.1

10.1

Dec

10.1

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

10.3

10.3

10.3

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10;2

10.2

10.1

10.1

10.1

10.1

TABLES 193
Table 14e. Mean daily ground-water temperature at site CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

9.9

9.9

9.9

9.9

9.9

9.9

Feb

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

--

--

Mar

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.9

9.9

9.9

9.9

9.9

9.9

10.0

Apr

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

9.9

9.9

9.9

9.9

May

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.7

9.7

9.7

9.7

9.6

9.6

9.6

9.6

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

Jun

1998

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.7

9.7

9.8

9.8

9.9

10.0

10.0

10.0

10.1

10.1

10.1

10.2

10.3

10.3

--

--

8.5

9.8

10.5

11.1

11.4

11.6

Jul

11.8

12.0

12.3

12.5

12.6

12.8

12.8

12.9

13.0

13.2

13.4

13.6

13.8

14.1

14.3

14.6

15.0

15.7

16.4

16.6

16.7

16.9

17.0

17.1

17.8

19.8

20.4

20.8

21.0

21.4

23.0

Aug

24.0

24.3

24.5

25.1

26.0

26.3

26.3

26.4

26.4

26.4

26.5

--

--

22.3

22.7

22.8

22.9

23.0

23.1

23.2

23.0

22.8

22.8

23.1

23.3

23.4

23.2

23.0

22.9

23.0

22.7

Sep

22.4

22.3

22.5

22.7

22.7

22.7

23.0

23.2

23.3

23.4

23.4

23.7

23.8

24.0

23.9

23.7

23.5

23.2

23.3

23.9

24.2

24.4

24.3

24.3

24.3

24.4

24.5

24.4

24.4

24.6

Oct

24.6

24.6

24.6

24.4

24.2

24.1

24.0

23.9

23.7

23.7

23.6

23.5

23.3

22.9

22.7

22.3

21.8

21.6

21.1

20.7

20.7

20.5

20.4

20.3

20.4

20.3

20.2

20.0

19.8

19.8

19.6

Nov

19.4

19.4

19.3

19.3

19.3

19.3

19.2

19.0

18.6

18.7

18.7

18.5

18.2

18.1

17.9

17.7

17.4

17.2

17.1

17.0

16.8

16.7

16.6

16.4

16.2

16.1

16.0

15.8

15.7

15.6

._

Dec

15.4

15.3

--

--

15.1

15.0

14.9

14.9

14.8

14.7

14.6

14.4

14.3

14.2

14.1

13.9

13.8

13.7

13.5

13.4

13.3

13.0

12.8

12.7

12.6

12.4

12.2

12.1

11.9

11.7

11.5

194 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14e. Mean daily ground-water temperature at site CRM-6 (map ID #5), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

11.4

11.3

11.1

10.9

10.8

10.7

10.4

10.3

10.2

10.1

10.0

10.0

9.9

9.8

9.8

9.7

9.7

9.6

9.4

9.4

9.4

9.3

9.3

9.2

9.0

9.0

9.0

8.9

8.8

8.8

8.7

Feb Mar Apr May Jun Jul

1999

8.8

8.8

8.8

8.6

8.6

8.5

8.5

8.4

8.3

8.3

8.3

8.2

8.1

8.1

8.2

8.1

8.1

8.0

7.9

7.9

7.7

7.7

7.7

7.6

7.6

7.5

7.5

7.5

--

--

--

Aug Sep Oct Nov Dec

--

--

-

--

--

..

--

--

--

--

--

--

--

-

-

-

--

-

-

--

--

--

-

-

--

--

--

--

--

TABLES 195
Table 14f. Mean daily ground-water temperature at site CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 10.9

25 10.9

26 10.9

27 10.9

28 10.9

29 10.9

30 10.9

31 10.9

Feb

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

11.0

11.0

10.9

10.9

10.9

11.0

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

10.9

-

-

..

Mar

10.9

10.9

10.9

10.9

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

Apr

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.5

10.5

10.5

10.5

10.5

10.5

10.5

May

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

Jun

1997

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

..

Jul

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.1

10.2

10.1

10.1

10.1

10.2

10.2

10.1

10.2

10.1

10.2

10.2

Aug

10.2

10.2

10.1

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

--

--

--

--

--

--

--

10.2

10.2

10.2

10.2

10.2

Sep

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

Oct

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.4

10.3

10.4

10.4

10.4

10.4

10.4

Nov

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

..

Dec

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.6

10.6

196 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14f. Mean daily ground-water temperature at site CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.6

10.6

10.6

10.6

--

--

--

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.7

10.7

Feb

10.7

10.7

10.7

10,7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

--

--

__

Mar

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

Apr

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

_

May

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.5

10.6

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

Jun

1998

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

._

Jul

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

Aug

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

Sep

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

._

Oct

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.5

10.5

10.5

Nov

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.6

10.6

Dec

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

-

--

10.6

10.6

10.6

10.6

10.7

10.6

10.7

10.7

10.7

10.7

TABLES 197
Table 14f. Mean daily ground-water temperature at site CRM-7 (map ID #6), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999--Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.8

10.8

10.8

10.8

10.8

10.8

10.8

Feb Mar Apr May Jun Jul

1999

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

10.8

--

--

--

Aug Sep Oct Nov Dec

--

--

--

-

--

--

--

--

--

--

--

--

..

--

--

--

--

..

-

--

--

--

--

--

..

--

--

--

--

--

--

198 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14g. Mean daily ground-water temperature at site CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 10.2

25 10.2

26 10.2

27 10.2

28 10.2

29 10.2

30 10.2

31 10.2

Feb

10.2

10.2

10.2

10.2

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

9.9

9.9

9.9

9.9

9.9

9.9

9.9

-

--

Mar

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.6

9.6

9.6

9.6

9.6

9.6

Apr

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

May

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

Jun

1997

9.3

9.3

9.3

9.4

9.4

9.4

9.4

9.4

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

Jul

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.4

9.3

9.3

9.4

9.4

9.4

9.4

9.4

9.4

9.4

Aug

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.5

9.4

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

9.5

Sep

9.5

9.5

9.5

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.7

9.7

9.7

9.7

9.7

9.7

Oct

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.7

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.9

9.9

9.9

Nov

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.1

10.1

10.1

Dec

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.2

10.2

12.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

10.3

10.3

10.3

TABLES 199
Table 14g. Mean daily ground-water temperature at site CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

Feb

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

--

--

_

Mar

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.3

10.3

10.4

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

Apr

10.3

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

10.3

10.3

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

May

10.2

10.2

10.2

10.2

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

9.9

9.9

9.9

10.0

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

Jun

1998

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.9

9.9

9.9

9.9

9.8

9.8

9.8

9.8

9.8

9.7

9.8

__

Jul

9.8

9.8

9.7

9.7

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

Aug

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

9.8

Sep

9.8

9.8

9.8

9.9

9.8

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

9.9

10.0

10.0

10.0

10.0

Oct

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

Nov

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.3

10.4

Dec

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.4

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.5

10.6

200 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14g. Mean daily ground-water temperature at site CRM-9 (map ID #7), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.7

10.7

10.7

10.7

10.7

10.7

Feb Mar Apr May Jun Jut

1999

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

--

--

--

Aug Sep Oct Nov Dec

-

-

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

-

..

--

--

--

-

--

--

--

--

--

--

--

--

TABLES 201
Table 14h. Mean daily ground-water temperature at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr

16.3

16.3

16.3

16.3

16.3

16.3

16.3

16.3

16.3

16.3

16.2

16.2

16.2

16.2

16.2

16.2

16.2

16.1

16.1

16.1

16.1

16.1

15.9

16.0

16.0

15.9

15.9

15.7

15.6

15.5

May Jun Jul

1996

15.3 - 11.1

15.1 -- 11.1

15.0 - 11.1

15.0 -- 11.1

14.9 -- 11.1

14.9 -- 11.1

15.0 - 11.1

15.0 -- 11.1

11.1

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.3

11.3

11.3

11.3

11.1 11.3

11.1 11.3

11.1 11.4

11.3

Aug

11.3

11.3

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.4

11.3

11.3

11.3

11.3

11.2

11.2

11.2

Sep

11.2

11.1

11.1

11.0

11.0

11.0

10.9

10.9

10.9

10.8

10.8

10.8

10.7

10.7

10.7

10.6

10.6

10.6

10.6

10.6

10.6

10.6

10.7

10.7

10.7

10.7

10.7

10.7

10.7

10.7

Oct

10.8

10.8

10.9

10.9

10.9

10.9

10.9

10.9

11.0

11.0

11.1

11.1

11.1

11.1

11.1

11.1

11.1

11.1

11.1

11.1

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

Nov

10.9

10.9

10.9

10.8

10.8

10.8

10.7

10.6

10.6

10.4

10.3

10.2

10.1

10.0

9.9

9.8

9.8

9.8

9.8

9.8

9.7

9.7

9.6

9.6

9.6

9.5

9.4

9.3

9.1

9.0

Dec

9.0

8.9

8.8

8.9

8.8

8.7

8.7

8.7

8.6

8.6

8.6

8.6

8.6

8.6

8.6

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.6

8.5

8.5

8.5

8.5

8.5

8.6

8.6

8.8

202 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14h. Mean daily ground-water temperature at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

8.6

8.6

8.6

8.7

8.7

8.7

8.7

8.7

8.7

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.8

8.9

8.9

8.9

8.9

8.9

8.9

9.0

9.0

9.0

9.0

9.0

9.1

9.1

Feb

9.1

9.1

9.1

9.1

9.1

9.1

9.2

9.1

9.1

9.2

9.2

9.2

9.2

9.2

9.3

9.3

9.3

9.3

9.3

9.3

9.4

9.4

9.4

9.4

9.4

9.4

9.5

9.5

--

--

Mar

9.5

9.5

9.5

9.6

9.6

9.6

9.6

9.6

9.6

9.7

9.7

9.7

9.7

9.8

9.8

9.8

9.8

9.8

9.8

9.9

9.9

9.9

9.9

9.9

10.0

10.0

10.0

10.1

10.1

--

Apr

__

--

--

--

10.3

10.3

10.4

10.4

10.4

10.5

10.5

10.5

10.6

10.6

10.6

10.6

10.6

10.7

10.7

10.7

10.7

10.7

10.8

10.8

10.8

10.8

10.8

10.8

10.9

10.9

May

10.9

10.9

10.9

10.9

11.0

11.0

11.0

11.0

11.0

--

--

--

--

--

--

--

--

--

--

--

-

--

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

11.2

Jun

1997

11.3

11.3

11.3

11.3

11.3

11.4

11.4

11.4

11.5

11.5

11.5

11.5

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

Jul

--

--

--

--

--

--

--

-

--

--

--

--

--

11.4

11.6

11.5

11.5

11.5

11.5

11.6

11.6

11.3

11.3

11.3

11.2

11.1

11.2

11.2

11.1

10.9

Aug

10.9

10.8

10.8

10.7

10.7

10.6

10.7

10.6

10.6

10.5

10.6

10.7

10.8

10.9

11.2

11.5

11.6

12.0

12.3

12.7

13.0

13.4

14.0

14.2

14.7

14.9

15.2

15.5

15.9

16.2

16.6

Sep

16.7

16.8

17.1

17.3

17.5

17.6

17.8

17.8

17.9

18.0

18.0

18.0

18.0

18.1

18.2

18.3

18.4

18.7

18.5

18.7

18.7

18.8

18.9

19.0

19.1

19.1

19.0

19.1

19.1

19.1

Oct

19.1

19.2

19.1

19.2

19.6

19.2

19.3

19.6

19.4

19.4

19.4

19.4

19.4

19.4

19.5

19.4

19.5

19.5

19.6

19.7

19.7

19.8

19.9

19.9

20.0

20.0

20.1

20.2

20.2

20.3

20.4

Nov

20.4

20.5

20.5

20.6

20.6

20.7

20.8

20.9

20.9

21.0

21.1

21.1

21.2

--

--

--

--

--

--

21.7

21.7

21.7

21.7

21.7

21.7

21.7

21.7

21.8

21.8

21.8

Dec

21.8

21.9

22.0

22.0

22.1

22.1

22.1

22.1

22.1

22.1

22.1

22.0

22.1

22.1

22.2

22.2

22.2

22.2

22.2

22.2

22.2

22.2

22.3

22.3

22.3

22.3

22.3

22.3

22.3

22.3

22.3

TABLES 203
Table 14h. Mean daily ground-water temperature at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

22.3

22.3

22.2

22.2

22.2

22.2

22.1

22.1

22.1

22.1

22.1

22.0

22.0

22.0

22.0

22.0

21.9

21.9

21.9

21.8

21.8

21.7

21.7

21.7

21.7

21.7

21.7

21.6

21.6

21.6

21.6

Feb

21.5

21.5

21.5

21.5

21.5

21.5

21.5

21.5

21.5

21.4

21.4

21.4

21.4

21.3

21.3

21.3

21.3

21.2

21.2

21.2

21.2

21.1

21.1

21.1

21.0

21.0

21.0

20.9

--

--

__

Mar

20.9

20.9

20.8

20.8

20.8

20.7

20.7

20.7

20.6

20.6

20.5

20.5

20.5

20.5

20.4

20.4

20.3

20.3

20.3

20.2

20.2

20.2

20.1

20.1

20.1

20.0

20.0

20.0

19.9

19.9

19.9

Apr

19.9

19.9

19.6

19.2

18.9

18.6

18.4

18.3

18.3

18.2

18.1

18.1

18.2

18.2

18.2

18.2

18.2

18.2

18.2

18.2

18.2

18.1

18.0

17.9

17.7

17.7

17.5

17.2

17.0

16.7

May

16.5

16.1

15.7

15.3

14.8

14.4

14.0

13.7

13.4

13.0

12.6

12.1

11.7

11.2

10.8

10.4

10.0

9.5

9.2

8.8

8.4

8.1

7.7

7.4

7.1

6.8

6.5

6.2

6.0

5.8

5.6

Jun

1998

5.4

5.2

5.0

4.8

4.6

4.5

4.5

4.4

4.4

4.3

4.3

4.3

4.2

4.2

4.1

4.1

4.1

4.0

4.1

4.1

4.0

4.0

4.0

3.9

4.0

4.0

4.0

4.1

4.1

4.1

Jul

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.2

4.2

4.3

4.3

4.4

4.5

4.6

4.7

4.8

5.0

5.2

5.4

5.6

5.8

6.0

6.3

6.6

6.9

7.2

7.5

7.8

8.1

Aug

8.4

8.6

8.8

9.0

9.3

9.5

9.7

9.9

10.1

10.4

10.7

11.0

11.3

11.6

11.9

12.1

12.3

12.5

12.7

12.9

13.1

13.3

13.6

13.8

14.0

14.2

14.3

14.6

14.7

14.8

15.0

Sep

15.1

15.3

15.5

15.6

15.8

15.9

16.1

16.2

16.4

16.5

16.6

16.7

16.9

17.1

17.3

17.3

17.6

17.7

17.8

17.9

18.1

18.2

18.3

18.4

18.6

18.7

18.9

19.0

19.3

19.5

Oct

19.7

20.0

20.3

20.4

20.7

20.9

21.2

21.3

21.5

21.6

21.8

21.9

22.1

22.2

22.3

22.6

22.5

22.7

22.8

22.9

23.0

23.1

23.3

23.4

23.4

23.5

23.6

23.7

23.8

23.8

23.9

Nov

24.0

24.0

24.1

24.1

24.2

24.2

24.3

24.3

24.3

24.4

24.4

24.4

24.4

24.3

24.3

24.3

24.3

24.3

24.2

24.2

24.2

24.1

24.1

24.0

24.0

23.9

23.8

23.8

23.7

23.6

Dec

23.5

23.4

23.3

23.2

23.1

23.0

22.9

22.9

22.8

22.7

22.7

22.6

22.5

22.5

22.4

22.3

22.2

22.2

22.1

22.0

21.9

21.8

21.7

21.5

21.4

21.3

21.2

21.0

20.9

20.8

20.6

204 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14h. Mean daily ground-water temperature at site CRM-11 (map ID #9), West Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

20.5

20.4

20.3

20.1

20.0

19.9

19.7

19.6

19.4

19.2

19.0

18.8

18.6

18.4

18.2

18.1

17.9

17.7

17.5

17.3

17.2

17.0

16.9

16.7

16.6

16.5

16.4

16.3

16.2

16.1

16.0

Feb Mar Apr May Jun Jul

1999

15.9

15.8

15.8

15.7

15.6

15.5

15.5

15.4

15.3

15.3

15.2

15.2

15.1

15.1

15.0

15.0

14.9

14.9

14.8

14.8

14.7

14.7

14.6

14.6

14.5

14.5

14.4

14.4

-

-

Aug Sep Oct Nov Dec

..

--

--

--

-

-

-

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

..

--

-

-

TABLES 205
Table 14i. Mean daily ground-water temperature at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr May Jun

1996

11.2 10.1

11.1 10.1

11.1 10.1

11.0 9.8

11.0 9.7

11.0 9.7

10.9 9.6

10.9 9.5

10.8

10.7

10.7

10.6

10.6

10.6

10.5

10.5

10.5

10.4

10.4

10.4

10.4

10.3

10.1

10.3

10.2

10.2

10.2

10.2 - 8.7

10.1 -- 8.7

10.2 -- 8.7

Jul

8.7

8.5

8.5

8.5

8.4

8.4

8.4

8.4

8.4

8.4

8.5

8.5

8.5

8.6

8.6

8.6

8.7

8.6

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.5

Aug

8.5

8.5

8.5

8.5

8.5

8.6

8.7

8.6

8.7

8.7

8.7

8.7

8.6

8.6

8.6

8.5

8.5

8.5

8.6

8.5

8.5

8.6

8.6

8.6

8.6

8.6

8.7

8.7

8.8

8.8

8.8

Sep

8.8

8.8

8.8

8.8

8.8

8.7

8.7

8.6

8.6

8.6

8.6

8.6

8.7

8.6

8.6

8.6

8.6

8.6

8.5

8.5

8.6

8.6

8.6

8.6

8.5

8.5

8.6

8.6

8.6

8.6

Oct

8.6

8.6

8.6

8.6

8.7

8.6

8.6

8.6

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.8

8.8

8.8

8.8

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.8

Nov

8.8

8.8

8.8

8.8

8.9

8.9

8.9

8.9

8.9

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.0

9.1

9.1

9.1

9.1

9.1

9.1

9.2

9.2

9.2

9.2

9.2

Dec

9.3

9.3

9.3

9.3

9.4

9.4

9.4

9.4

9.4

9.4

9.3

9.5

9.5

9.5

9.5

9.5

9.5

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.6

9.7

9.7

9.7

9.7

9.7

9.8

206 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14i. Mean daily ground-water temperature at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

9.9

9.9

10.0

10.0

10.1

10.1

10.1

10.1

10.0

10.0

9.9

9.9

9.9

9.9

9.9

10.0

10.0

10.0

10.0

10.0

10.1

10.2

10.3

10.4

10.5

10.7

10.8

10.9

10.9

11.0

11.0

Feb

11.0

11.0

11.0

11.0

11.1

11.1

11.1

11.0

11.1

11.1

11.1

11.1

11.1

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.1

11.1

11.1

11.1

--

--

.-

Mar

11.1

11.1

11.1

11.2

11.2

11.2

11.2

11.2

11.2

11.3

11.3

11.4

11.4

11.5

11.5

11.5

11.5

11.6

11.6

11.6

11.6

11.6

11.6

11.5

11.5

11.5

11.5

11.5

11.5

11.5

11.5

Apr

11.5

11.6

11.5

11.5

11.5

11.4

11.4

11.4

11.4

11.4

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

11.3

May

11.3

11.3

11.3

11.2

11.2

11.2

11.2

11.2

11.2

--

--

--

--

--

--

--

--

--

-

-

-

--

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

Jun

1997

11.0

10.9

10.9

10.9

10.9

10.8

10.8

10.8

10.8

10.6

10.6

10.7

10.7

10.7

10.7

10.7

10.8

10.8

10.7

10.5

10.4

10.4

10.3

10.2

10.4

10.2

10.2

10.2

10.2

10.1

Jul

10.1

10.1

10.1

10.0

10.0

10.0

10.0

10.0

10.0

10.0

--

-

--

--

7.6

7.7

7.8

7.8

7.8

7.8

7.8

7.7

7.6

7.6

7.5

7.4

7.4

7.3

7.2

7.2

7.1

Aug

7.0

6.9

6.9

6.8

6.8

6.7

6.7

6.6

6.6

6.6

6.5

6.5

6.5

6.5

6.5

6.4

6.4

6.4

6.4

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.7

6.8

6.9

Sep

7.0

7.1

7.1

7.2

7.2

7.3

7.4

7.4

7.4

7.4

7.5

7.5

7.4

7.4

7.3

7.3

7.2

7.1

7.1

7.1

7.1

7.1

7.1

7.0

7.0

7.0

7.0

7.0

7.0

7.0

Oct

7.0

7.0

7.1

7.1

7.0

7.0

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.4

7.5

7.7

7.8

7.9

8.0

Nov

8.1

8.2

8.3

8.3

8.4

8.4

8.5

8.5

8.6

8.6

8.6

8.6

8.6

8.6

8.7

8.7

8.8

8.9

9.0

9.2

9.5

9.7

9.8

9.7

9.6

9.5

9.5

9.5

9.5

9.6

Dec

9.8

9.9

9.9

10.0

10.0

10.1

10.2

10.3

10.3

10.3

10.3

10.3

10.4

10.5

10.7

10.9

11.2

11.4

11.7

11.9

11.9

11.8

11.6

11.6

11.6

11.5

11.4

11.5

11.7

11.9

12.1

TABLES 207
Table 14i. Mean daily ground-water temperature at site CRM-12 (map ID#10), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

12.2

12.4

12.4

12.6

12.6

12.7

12.9

13.0

13.1

13.1

13.1

13.2

13.4

13.5

13.5

13.4

13.4

13.2

13.1

12.9

12.8

12.6

12.4

12.3

12.1

12.1

12.1

12.1

12.0

12.0

12.0

Feb

11.9

11.9

11.6

11.4

11.4

11.3

11.1

10.9

10.9

10.8

10.8

10.8

10.7

10.7

10.7

10.7

10.8

10.8

10.8

10.7

10.7

10.6

10.6

10.5

10.4

10.4

10.5

10.6

--

--

_

Mar

10.7

10.8

10.9

10.9

10.9

10.9

10.9

10.8

10.8

10.7

10.6

10.3

9.9

9.6

9.4

9.1

8.8

8.6

8.4

8.4

8.4

8.4

8.5

8.5

8.5

8.5

8.5

8.5

8.5

8.4

8.4

Apr

8.4

8.3

8.1

8.0

8.0

8.1

8.1

8.2

8.3

8.3

8.3

8.3

8.2

8.2

8.2

8.1

8.1

8.2

8.2

8.2

8.1

8.2

8.2

8.2

8.2

8.2

8.1

8.0

7.8

7.7

May

7.7

7.7

7.7

7.6

7.6

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.2

7.1

7.1

7.0

6.9

6.9

6.8

6.8

Jun

1998

6.7

6.7

6.6

6.6

6.5

6.5

6.5

6.2

6.2

6.1

6.1

6.3

6.3

6.3

6.3

6.3

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.5

6.5

6.6

6.6

6.7

6.7

6.7

Jul

6.7

6.7

6.8

6.8

6.8

6.8

6.7

6.7

6.7

6.7

6.8

6.8

6.8

6.8

6.9

6.9

6.9

6.9

6.9

6.9

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.1

7.0

Aug

7.0

7.0

7.0

7.0

7.0

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.4

7.4

7.5

7.6

7.6

Sep

7.7

7.7

7.7

7.8

7.8

7.9

7.9

8.0

8.0

8.0

8.1

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.2

8.3

8.2

Oct

8.1

8.0

8.0

8.0

8.0

8.0

8.0

8.1

8.1

8.1

8.1

8.2

8.2

8.2

8.2

8.3

8.3

8.3

8.4

8.4

8.4

8.5

8.6

8.6

8.7

8.7

8.8

8.8

8.8

8.8

8.9

Nov

8.9

9.0

9.0

9.0

9.0

9.0

9.0

9.1

9.2

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.2

9.2

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.0

9.0

9.0

9.1

9.0

Dec

9.1

9.1

9.1

9.1

9.1

9.1

9.1

9.2

9.2

9.2

9.2

9.2

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.5

208 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 141. Mean daily ground-water temperature at site CRM-12 (map ID #10), East Well Field, Cedar Rapids, Iowa, April 

1996 through February 1999

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

9.5

9.5

9.5

9.5

9.5

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.4

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.3

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

Feb Mar Apr May Jun Jul

1999

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.1

9.1

9.1

9.1

9.1

9.1

9.1

--

--

-

Aug Sep Oct Nov Dec

--

..

--

--

..

--

--

..

--

--

--

--

--

-

..

..

--

--

--

--

--

--

--

--

--

--

--

-

--

-

--

TABLES 209
Table 14j. Mean daily ground-water temperature at site CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 9.4

25 9.4

26 9.4

27 9.4

28 9.3

29 9.2

30 9.1

31 9.1

Feb

9.0

9.0

9.0

9.0

9.0

8.9

8.9

8.9

8.9

8.9

8.8

8.8

8.7

8.7

8.7

8.7

8.6

7.6

6.3

6.9

7.6

7.7

7.7

7.9

7.8

7.5

7.3

7.2

--

--

_

Mar

7.0

7.0

6.9

6.8

6.8

6.8

6.7

6.7

6.6

6.6

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.5

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.5

6.5

6.5

6.6

6.6

6.6

Apr

6.6

6.5

6.5

6.5

6.5

6.6

6.5

6.5

6.5

6.6

6.6

6.6

6.5

6.5

6.5

6.5

6.5

6.4

6.4

6.4

6.4

6.3

6.3

6.3

6.3

6.3

6.3

6.3

6.4

6.3

_

May

6.3

6.3

6.4

6.4

6.4

6.4

6.4

6.5

6.5

6.6

6.6

6.6

6.7

6.7

6.7

6.8

6.8

6.9

6.9

6.9

7.0

7.0

7.1

7.1

7.2

7.3

7.3

7.4

7.5

7.5

7.6

Jun

1997

7.7

7.8

7.8

7.8

7.9

7.9

8.0

8.0

8.0

8.1

8.1

8.2

8.2

8.3

8.3

8.4

8.4

8.5

8.5

8.5

8.6

8.6

8.6

8.6

8.7

8.7

8.7

8.7

8.7

8.7

..

Jul

8.7

8.8

8.8

8.8

8.9

8.9

9.0

9.0

9.0

9.1

9.1

9.2

9.2

9.3

9.4

9.4

9.4

9.4

9.5

9.5

9.5

9.6

9.6

9.6

9.7

9.7

9.7

9.8

9.8

9.9

9.9

Aug

9.9

10.0

10.0

10.1

10.1

10.1

10.2

10.2

10.3

10.3

10.4

10.4

10.4

10.5

10.5

10.5

10.6

10.6

10.7

10.7

10.7

10.8

10.8

10.8

10.9

10.9

11.0

11.0

11.1

11.1

11.1

Sep

11.2

11.2

11.2

11.3

11.3

11.4

11.4

11.4

11.4

11.5

11.5

11.5

11.6

11.6

11.6

11.7

11.7

11.7

11.8

11.8

11.8

11.8

11.8

11.8

11.9

11.9

11.9

11.9

11.9

11.9

_

Oct

11.9

11.9

11.9

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

11.9

11.9

11.9

11.9

11.9

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

Nov

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.0

12.1

12.1

12.0

--

--

--

--

--

--

--

11.9

11.9

11.9

11.9

11.8

11.8

11.8

11.7

11.7

11.7

..

Dec

11.7

11.6

11.6

11.6

11.6

11.5

11.5

11.4

11.4

11.3

11.3

11.2

11.2

11.1

11.1

11.0

11.0

10.9

10.9

10.9

10.9

10.8

10.8

10.7

10.7

10.7

10.6

10.6

10.6

10.5

10.5

210 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14j. Mean daily ground-water temperature at site CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.5

10.4

10.4

10.4

10.4

10.3

10.3

10.3

10.3

10.3

10.2

10.2

10.1

10.1

10.1

10.0

10.0

9.9

9.9

9.9

9.8

9.8

9.8

9.7

9.7

9.7

9.6

9.6

9.5

9.5

9.5

Feb

9.4

9.4

9.4

9.3

9.3

9.3

9.3

9.2

9.2

9.1

9.1

9.1

9.1

9.0

9.0

8.9

8.9

8.9

8.9

8.8

8.8

8.8

8.7

8.7

8.7

8.7

8.7

8.6

--

--

_

Mar

8.6

8.6

8.6

8.6

8.6

8.6

8.5

8.4

8.4

8.4

8.3

8.3

8.2

8.2

8.1

8.2

8.1

8.1

8.1

8.0

8.0

8.0

7.9

7.9

7.9

7.9

7.9

7.9

7.8

7.8

7.8

Apr

7.7

7.6

7.6

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.7

7.6

7.6

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.5

7.5

7.5

7.5

7.5

May

7.5

7.6

7.6

7.6

7.7

7.7

7.8

7.8

7.9

7.9

7.9

8.0

8.1

8.1

8.2

8.2

8.3

8.3

8.3

8.4

8.4

8.5

8.5

8.6

8.6

8.7

8.7

8.7

8.8

8.8

8.8

Jim

1998

8.9

8.9

8.9

8.9

9.0

9.0

9.0

9.1

9.1

9.1

9.2

9.2

9.3

9.3

9.3

9.3

9.4

9.4

9.4

9.4

9.5

9.5

9.6

9.6

9.6

9.7

9.7

9.7

9.7

9.8

Jul

9.9

10.0

10.0

10.1

10.1

--

--

9.0

9.0

--

10.7

10.8

10.8

10.9

11.0

11.1

11.2

11.3

11.4

11.5

11.5

11.7

11.7

11.8

11.8

11.9

11.9

12.0

12.0

12.0

12.0

Aug

12.1

12.1

12.2

12.2

12.2

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.3

12.4

12.4

12.4

12.4

12.4

12.5

12.5

12.5

12.5

12.5

12.5

12.5

12.5

12.5

12.6

12.6

12.6

12.6

Sep

12.6

12.6

12.6

12.6

12.6

12.7

12.7

12.7

12.7

12.7

12.8

12.8

12.8

12.9

12.9

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

13.0

..

Oct

13.0

13.1

13.1

13.1

13.1

13.2

13.2

13.2

13.2

13.2

13.2

13.2

13.3

13.2

13.2

13.3

13.2

13.2

13.2

13.1

13.1

13.1

13.0

13.0

13.0

13.0

13.0

13.0

12.9

12.9

12.9

Nov

12.9

12.9

12.9

12.9

12.8

12.8

12.8

12.8

12.7

12.7

12.7

12.7

12.6

12.6

12.6

12.6

12.5

12.5

12.5

12.5

12.4

12.4

12.3

12.3

12.3

12.2

12.2

12.2

12.1

12.1

_.

Dec

12.0

12.0

11.9

11.9

11.8

11.8

11.8

11.7

11.6

11.6

11.6

11.5

11.5

11.5

11.5

11.4

11.4

11.4

11.4

11.3

11.3

11.3

11.3

11.3

11.2

11.2

11.2

11.2

11.2

11.1

11.1

TABLES 211
Table 14). Mean daily ground-water temperature at site CRM-15 (map ID #12), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

11.1

11.1

11.0

11.0

11.0

11.0

10.9

10.9

10.9

10.9

10.8

10.8

10.7

10.7

10.6

10.6

10.5

10.5

10.4

10.4

10.3

10.3

10.2

10.2

10.1

10.1

10.0

10.0

9.9

9.9

9.9

Feb Mar Apr May Jun Jul

1999

9.8

9.8

9.7

9.7

9.6

9.6

9.5

9.4

9.4

9.3

9.3

9.2

9.2

9.1

9.1

9.0

8.9

8.8

8.8

8.8

8.7

8.7

8.7

8.6

8.6

8.5

8.5

8.4

--

--

--

Aug Sep Oct Nov Dec

..

--

-

--

--

--

--

--

-

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

-

--

-

--

--

212 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14k. Mean daily ground-water temperature at site CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 8.3

25 8.5

26 8.7

27 8.6

28 8.7

29 8.8

30 8.9

31 9.2

Feb

9.3

9.5

9.6

9.7

9.7

9.8

9.9

9.9

9.9

9.8

9.8

9.7

9.6

9.6

9.5

9.4

9.3

9.2

9.3

9.0

7.8

6.5

5.8

5.5

5.4

5.3

4.9

4.4

--

--

_

Mar

4.0

3.7

3.4

3.1

3.0

2.9

2.8

2.7

2.6

2.5

2.4

2.3

2.1

1.9

1.8

1.7

1.7

1.6

1.6

1.6

1.6

1.5

1.4

1.3

1.3

1.3

1.3

1.3

1.4

1.4

1.5

Apr

1.5

1.6

1.6

1.7

1.7

1.7

1.7

1.7

1.8

2.0

2.2

2.4

2.4

2.5

2.5

2.5

2.5

2.5

2.6

2.6

2.7

2.7

2.8

2.9

2.9

3.0

3.0

3.0

3.0

3.1

_

May

3.1

3.2

3.1

3.0

2.9

2.8

2.7

2.7

2.8

2.8

2.8

2.8

2.9

2.9

3.0

3.0

3.0

3.0

3.0

3.1

3.2

3.2

3.2

3.3

3.2

3.2

3.1

3.1

3.1

3.2

3.2

Jun

1997

3.2

3.3

3.3

3.4

3.4

3.5

3.5

3.5

3.5

3.5

3.5

3.6

3.6

3.7

3.7

3.7

3.7

3.8

3.8

3.9

4.0

4.0

4.0

4.0

3.9

3.9

3.8

3.8

3.8

3.8

__

Jul

3.8

3.8

3.8

3.8

3.8

3.8

3.9

3.9

4.0

4.1

4.2

4.2

4.3

4.4

4.5

4.6

4.6

4.6

4.6

4.6

4.7

4.7

4.8

4.9

4.9

5.0

5.0

5.0

5.1

5.1

5.2

Aug

5.2

5.3

5.3

5.3

5.3

5.3

5.4

5.4

5.5

5.6

5.6

5.7

5.8

5.9

5.9

6.0

6.1

6.2

6.2

6.3

6.4

6.4

6.5

6.6

6.6

6.7

6.7

6.7

6.7

6.7

6.7

Sep

6.7

6.7

6.6

6.6

6.5

6.5

6.4

6.3

6.2

6.1

6.1

6.1

6.1

6.1

6.2

6.2

6.3

6.5

6.7

7.0

7.4

7.8

8.1

8.5

8.7

9.0

9.2

9.3

9.4

9.4

..

Oct

9.4

9.3

9.3

9.2

9.1

9.1

9.1

9.2

9.2

9.3

9.5

9.7

9.9

10.2

10.5

10.5

10.5

10.7

10.7

10.8

10.9

11.0

11.2

11.2

11.3

11.4

11.4

11.5

11.5

11.5

11.5

Nov

11.6

11.6

11.6

11.6

11.6

11.7

11.7

11.6

11.9

12.1

12.2

12.3

12.4

12.5

12.7

13.0

--

--

--

-

13.2

13.2

13.3

13.3

13.3

13.3

13.3

13.3

13.3

13.3

Dec

13.3

13.2

13.2

13.4

13.5

13.5

13.4

13.6

13.8

14.0

14.1

14.2

14.4

14.4

14.4

14.5

14.5

14.6

14.7

14.8

14.9

15.0

15.1

15.3

15.5

15.7

15.8

15.9

16.0

16.0

16.1

TABLES 213
Table 14k. Mean daily ground-water temperature at site CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

16.2

16.3

16.3

16.1

16.0

16.1

16.0

16.0

15.8

15.7

15.5

15.2

15.0

14.8

14.7

14.8

14.9

14.9

14.9

14.9

15.0

15.0

14.9

14.7

14.5

14.4

14.2

14.1

13.8

13.6

13.5

Feb

13.3

13.2

13.2

13.1

13.1

13.1

13.1

13.1

13.2

13.2

13.3

13.3

13.4

13.5

13.5

13.6

13.7

13.9

13.8

13.7

13.6

13.5

13.4

13.3

13.3

13.3

13.3

13.3

-

-

..

Mar

13.3

13.3

13.3

13.3

13.2

13.1

13.0

12.9

12.8

12.7

12.5

12.4

12.2

12.1

12.0

11.8

11.7

11.5

11.3

11.2

11.0

10.8

10.6

10.4

10.2

10.0

9.8

9.5

9.3

9.1

8.5

Apr

8.0

7.9

7.9

7.9

7.9

7.9

8.0

8.1

8.2

8.3

8.3

8.4

8.4

8.5

8.6

8.6

8.6

8.6

8.5

8.5

8.3

8.2

8.1

8.0

7.9

7.8

7.7

7.7

7.6

7.6

May

7.5

7.5

7.5

7.5

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.4

7.3

7.3

7.3

7.3

7.2

7.2

7.2

7.2

7.1

7.1

7.1

7.0

7.0

6.9

6.9

6.8

6.8

6.7

Jun

1998

6.6

6.6

6.6

6.6

6.6

6.6

6.6

6.7

6.7

6.7

6.8

6.7

6.7

6.6

6.7

6.7

6.8

6.8

6.8

6.8

6.8

6.8

6.8

6.9

6.9

7.0

7.0

7.1

7.1

7.2

Jul

7.2

7.2

7.3

7.3

7.4

7.4

7.3

7.3

7.2

7.3

7.2

7.2

7.1

7.1

7.1

7.1

7.1

7.2

7.2

7.2

7.2

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

7.3

Aug

7.3

7.3

7.2

7.2

7.2

7.2

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.1

7.2

7.4

8.2

8.3

8.3

8.3

8.3

8.4

8.5

8.6

8.7

8.8

8.9

9.0

9.1

9.2

9.3

Sep

9.5

9.3

9.3

9.6

10.1

10.2

10.4

10.7

10.9

11.0

11.2

11.3

11.5

11.8

9.8

8.6

8.7

8.8

8.8

8.9

8.9

8.9

8.8

8.9

8.9

8.9

9.0

9.0

9.0

9.1

Oct

9.1

9.1

9.1

9.2

9.3

9.4

9.5

9.5

9.6

9.6

9.6

9.7

9.7

9.8

9.9

10.0

10.1

10.2

10.4

10.6

11.0

11.5

11.9

12.1

12.3

12.5

12.7

12.8

13.0

13.1

13.3

Nov

13.5

13.6

13.8

14.0

14.2

14.3

14.5

14.6

14.6

14.7

14.9

15.1

15.2

15.4

15.6

15.7

15.9

16.0

16.2

16.3

16.4

16.5

16.7

16.8

17.0

17.2

17.3

17.4

17.6

17.7

Dec

17.9

18.1

18.2

18.4

18.5

18.6

18.7

18.9

19.0

19.1

19.2

19.3

19.4

19.4

19.5

19.5

19.6

19.6

19.6

19.6

19.6

19.6

19.6

19.6

19.6

19.6

19.6

19.6

19.7

19.7

19.7

214 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14k. Mean daily ground-water temperature at site CRM-16 (map ID #13), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

19.7

19.8

19.8

19.8

19.8

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.9

19.8

19.8

19.8

19.8

19.8

19.7

19.7

19.7

19.7

Feb Mar Apr May Jun Jul

1999

19.6

19.6

19.6

19.5

19.5

19.4

19.4

19.4

19.3

19.3

19.3

19.3

19.3

19.3

19.4

19.4

19.4

19.4

19.4

19.3

19.2

19.1

19.0

18.9

18.8

18.7

18.5

18.4

--

--

..

Aug Sep Oct Nov Dec

--

--

--

--

--

--

--

..

--

--

--

--

-

..

--

--

--

--

--

--

--

..

--

-

--

--

--

--

--

--

TABLES 215
Table 141. Mean daily ground-water temperature at site CRM-17 (map ID #14), Seminole Well Field, Cedar Rapids, Iowa, 

November 1997 through September 1998

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan Feb Mar Apr May Jun Jul

1997

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Aug Sep Oct Nov Dec

15.9

15.9

15.8

15.7

15.7

15.5

15.4

15.1

14.8

14.5

14.3

14.1

14.1

14.2

14.4

14.6

14.8

14.9

15.0

15.1

16.0 15.1

16.0 15.0

16.1 14.9

16.1 14.9

16.0 14.7

16.0 14.7

16.0 14.7

16.0 14.7

16.0 14.7

15.9 14.7

14.6

216 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 141. Mean daily ground-water temperature at site CRM-17 (map ID #14), Seminole Well Field, Cedar Rapids, Iowa, 

November 1997 through September 1998-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

14.5

14.5

14.5

14.6

14.6

14.6

14.7

14.7

14.7

14.7

14.7

14.7

14.7

14.6

14.5

14.3

14.2

13.8

13.6

13.5

13.3

13.3

13.3

13.5

13.6

13.7

13.8

13.7

13.7

13.6

13.5

Feb

13.3

13.2

13.0

12.8

12.7

12.5

12.4

12.2

12.1

11.9

11.7

11.6

11.5

11.4

11.2

11.1

11.0

10.9

10.9

11.0

10.9

11.1

11.2

11.3

11.2

11.1

11.1

11.2

--

--

--

Mar

11.4

11.6

11.7

11.7

11.7

11.5

11.2

10.9

10.4

10.1

9.8

9.6

9.5

9.5

9.5

9.5

9.5

9.6

9.6

9.6

9.6

9.6

9.6

9.5

9.5

9.4

9.4

9.3

9.1

9.3

10.1

Apr

11.0

10.9

11.1

11.3

11.4

11.4

11.3

11.2

11.2

11.1

11.1

11.0

11.0

11.0

10.9

10.9

10.9

10.9

10.6

9.9

9.3

10.0

10.9

11.2

11.2

11.6

12.3

13.3

14.1

14.4

--

May

13.9

13.3

12.9

12.6

12.6

12.8

13.0

13.2

13.3

13.4

13.6

13.8

13.8

13.6

13.4

13.2

12.9

12.5

12.1

11.8

11.5

11.2

11.1

11.0

10.9

10.8

10.6

10.2

9.8

9.3

8.9

Jun

1998

8.6

8.9

10.7

14.7

17.4

18.6

19.0

18.7

17.9

16.8

15.5

14.7

17.5

18.8

18.5

18.3

18.2

18.1

18.0

17.9

18.1

18.6

18.8

18.9

19.0

19.0

19.1

19.2

19.3

19.5

--

Jul

19.8

20.1

20.3

20.4

20.7

21.1

21.8

22.6

23.0

23.2

23.3

23.0

22.6

22.2

22.0

21.7

21.2

20.4

19.8

19.2

18.6

18.1

17.6

17.2

16.8

16.5

16.3

16.2

15.9

15.7

15.6

Aug

15.5

15.4

15.2

15.0

14.7

14.4

14.0

13.7

13.5

13.2

13.0

12.8

12.7

12.6

12.5

12.5

12.6

12.5

12.5

12.6

12.7

12.8

13.0

13.1

13.3

13.5

13.7

13.9

14.2

14.4

14.6

Sep

14.8

14.9

14.5

14.5

14.4

14.4

14.5

14.5

14.6

14.7

14.8

14.9

15.3

15.6

15.8

16.0

16.1

16.2

16.3

16.4

16.4

16.3

15.8

15.6

15.6

15.6

15.7

--

--

--

--

Oct Nov Dec

--

--

--

--

..

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

..

--

--

TABLES 217
Table 14m. Mean daily ground-water temperature at site CRM-18 (map ID #15), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 9.3

25 10.5

26 10.8

27 10.9

28 10.8

29 10.5

30 10.2

31 10.0

Feb

9.9

9.8

9.7

9.9

10.3

10.5

10.7

10.8

10.8

10.8

10.8

10.7

10.7

10.8

10.8

10.6

10.4

10.1

10.5

11.4

11.2

9.6

9.4

10.9

11.6

11.4

10.5

9.6

--

--

..

Mar

8.7

7.7

6.9

6.4

6.4

6.3

6.2

6.5

6.8

7.1

7.5

7.9

8.0

8.0

7.8

7.6

7.4

7.2

7.2

7.4

7.2

6.3

5.4

4.7

4.3

3.7

2.4

2.3

1.9

1.7

1.6

Apr

1.7

1.9

2.0

2.1

2.2

2.4

2.7

3.0

3.5

4.1

4.4

4.6

4.7

4.8

4.8

4.9

4.9

4.9

4.8

4.8

4.8

4.8

4.8

4.8

4.8

4.7

4.7

4.8

4.7

4.6

May

4.6

4.7

4.7

4.9

4.9

4.9

4.9

5.0

4.9

4.8

4.8

4.8

5.1

5.9

7.2

7.8

7.9

7.7

7.6

7.4

6.9

6.7

6.6

6.3

6.1

5.9

5.9

5.9

6.2

6.2

6.2

Jun

1997

6.2

6.1

6.2

6.3

6.3

6.3

6.3

6.3

6.3

6.2

5.9

5.5

5.0

4.3

3.7

3.5

3.1

3.1

3.1

3.2

3.2

3.1

3.0

3.0

3.0

3.5

3.7

4.4

5.2

5.7

Jul

6.2

6.3

6.9

7.7

9.0

10.0

10.3

10.1

9.6

9.1

8.5

7.9

7.7

7.7

7.6

7.0

6.1

5.5

5.3

5.3

5.3

5.4

5.5

5.6

5.7

5.8

6.1

6.6

7.0

7.4

7.9

Aug

8.5

9.0

9.5

10.1

10.7

11.6

12.3

12.7

13.1

13.5

13.8

13.9

14.0

14.1

14.2

14.3

14.3

14.4

14.4

14.4

14.7

15.3

15.8

16.4

16.9

17.6

18.2

18.6

18.6

19.1

19.9

Sep

20.7

21.4

22.4

23.1

23.6

23.9

24.3

24.4

24.3

24.0

23.8

23.7

23.7

23.6

23.6

23.6

23.6

23.6

23.6

23.5

23.4

23.4

23.3

23.2

23.1

23.0

22.9

22.9

22.9

22.8

Oct

22.8

22.8

22.8

22.9

22.9

23.0

23.0

23.0

23.1

23.1

23.1

23.1

23.0

23.0

23.0

22.9

22.9

22.8

22.7

22.4

22.2

22.0

21.8

21.7

21.5

21.4

21.3

21.2

21.1

21.0

21.0

Nov

20.9

20.9

20.8

20.8

20.8

20.7

20.7

20.6

20.6

20.5

20.4

20.3

20.2

--

--

--

--

--

--

--

20.0

19.9

19.9

19.9

19.9

19.8

19.7

19.6

19.5

19.4

__

Dec

19.2

19.1

19.0

18.8

18.5

18.1

17.7

17.2

16.6

16.1

15.8

15.4

15.1

14.9

14.8

14.5

14.2

13.9

13.5

13.1

12.7

12.1

11.5

10.9

10.5

10.0

9.4

8.8

8.2

7.7

7.2

218 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14m. Mean daily ground-water temperature at site CRM-18 (map ID #15), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

6.7

6.3

6.0

5.6

5.3

5.0

4.7

4.5

4.3

4.2

4.1

4.0

3.9

3.8

3.6

3.1

2.6

2.4

2.2

2.1

2.1

2.0

2.0

1.9

1.8

1.8

1.7

1.6

1.6

1.5

1.4

Feb

1.3

1.2

1.2

1.1

1.0

1.0

1.0

1.0

0.9

0.9

0.9

0.9

0.9

1.0

1.0

0.9

0.9

0.9

0.9

0.9

0.8

0.8

0.8

0.8

0.7

0.7

0.7

0.7

--

--

_

Mar

0.8

0.8

0.9

0.9

0.9

0.9

0.9

0.9

0.9

0.8

0.8

0.8

0.8

0.8

0.8

0.9

0.9

0.9

1.1

1.2

1.2

1.2

1.3

1.2

1.2

1.1

1.0

1.0

1.0

1.0

0.8

Apr

0.9

1.0

1.1

1.1

1.1

1.1

1.1

1.2

1.2

1.2

1.2

1.2

1.2

1.2

1.3

1.3

1.3

1.3

1.3

1.4

1.4

1.4

1.5

1.6

1.5

1.4

1.6

1.9

2.7

4.0

May

5.8

6.4

6.2

5.6

4.8

4.3

4.0

3.7

3.5

3.1

2.7

2.3

2.2

2.0

1.9

1.9

1.9

2.0

2.1

2.3

2.5

2.7

2.9

3.3

3.7

4.1

4.6

5.2

5.7

6.2

6.6

Jun

1998

7.0

7.2

7.8

9.0

10.1

10.8

11.3

11.8

12.2

12.8

13.4

13.9

13.9

13.9

13.9

13.9

13.8

13.8

13.7

13.6

13.6

13.6

--

--

3.0

3.5

3.7

4.4

5.2

5.7

Jul

6.2

6.3

6.9

7.7

9.0

10.0

10.3

10.1

9.6

9.1

8.5

7.9

7.7

7.7

7.6

7.0

--

14.9

15.0

15.1

15.2

15.1

15.4

15.5

15.5

15.6

15.6

15.7

15.7

15.7

15.7

Aug

15.7

15.7

15.7

15.8

15.8

15.8

15.9

16.0

16.2

16.4

16.6

16.8

16.9

17.1

17.3

17.5

17.7

17.8

17.9

17.8

18.1

18.2

18.1

18.5

19.2

20.0

20.9

21.7

22.1

22.2

22.3

Sep

22.4

22.8

23.1

23.1

23.1

23.0

23.0

23.1

23.2

23.3

23.4

23.5

23.6

23.7

23.7

23.8

23.9

24.1

24.3

24.5

24.6

24.7

24.8

24.9

24.9

24.9

24.8

24.8

24.8

24.8

Oct

24.7

24.7

24.7

24.6

24.6

24.6

24.5

24.4

24.2

24.0

24.0

24.1

24.1

24.1

24.0

24.0

24.0

23.9

23.8

23.8

23.7

23.6

23.5

23.5

23.4

23.3

23.2

23.1

23.1

23.0

22.9

Nov

22.8

22.7

22.6

22.4

22.3

22.1

21.8

21.6

21.4

21.2

21.0

20.8

20.6

20.4

20.1

19.9

19.7

19.4

19.1

18.8

18.6

18.5

18.3

18.1

17.9

17.7

17.6

17.5

17.3

17.1

Dec

17.0

16.9

16.8

16.7

16.6

16.6

16.5

16.4

16.3

16.1

16.0

15.9

15.7

15.6

15.5

15.6

16.1

16.6

16.8

16.8

16.6

16.4

16.2

15.9

15.6

15.2

14.7

14.0

13.3

12.5

11.6

TABLES 219
Table 14m. Mean daily ground-water temperature at site CRM-18 (map ID #15), Seminole Well Field, Cedar Rapids, 

Iowa, January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.8

10.2

9.6

9.2

8.8

8.6

8.5

8.4

8.4

8.4

8.4

8.5

8.6

8.6

8.7

8.8

8.8

8.8

8.8

8.8

8.9

9.0

9.0

9.0

8.9

8.9

8.9

8.9

8.9

8.9

8.8

Feb Mar Apr May Jun Jul

1999

8.7

8.5

8.2

8.4

8.8

8

0 .8

88

8.7

8.5

8.3

7.6

6.9

6.4

6.0

5.8

5.7

5.5

5.3

5.1

4.9

4.6

4.5

4.4

4.4

4.4

4.4

4.4

4.4

--

--

--

Aug Sep Oct Nov Dec

--

--

--

--

..

--

--

--

--

--

--

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

220 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14n. Mean daily ground-water temperature at site CRM-19 (map ID #16), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24 -0.2

25 -0.1

26 -0.1

27 -0.1

28 -0.1

29 -0.1

30 -0.1

31 -0.1

Feb

-0.1

-0.1

-0.1

-0.1

-0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.1

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.3

-

-

_

Mar

0.3

0.3

0.3

0.2

0.2

0.2

0.2

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.3

0.3

0.3

0.2

0.3

0.2

0.3

0.3

Apr

0.3

0.4

0.5

0.5

0.5

0.7

0.8

0.9

1.2

1.3

1.5

1.5

1.7

2.0

2.3

2.1

2.3

2.7

3.0

3.3

3.7

4.1

4.4

4.4

4.3

4.2

4.3

4.4

4.5

4.4

..

May

4.3

4.2

4.2

4.2

4.2

4.3

4.3

4.3

4.5

4.7

4.9

5.2

5.4

5.7

6.1

6.6

7.0

7.3

7.5

7.7

7.9

8.2

8.4

8.6

8.8

9.1

9.4

9.7

9.8

9.8

10.0

Jun

1997

10.2

10.4

10.5

10.5

10.5

10.4

10.4

10.4

10.3

10.3

10.3

10.3

10.3

10.3

9.9

10.3

10.4

10.3

10.7

10.9

11.3

11.4

11.3

11.6

11.9

12.4

12.7

13.0

13.6

14.2

Jul

14.7

15.3

15.3

16.0

16.6

17.2

17.8

18.2

18.7

19.1

19.4

19.7

20.0

20.2

20.1

20.4

20.8

21.0

21.2

21.3

21.5

21.6

21.7

21.8

21.9

22.1

22.3

22.6

22.8

23.0

23.2

Aug

23.5

23.7

23.9

24.1

24.2

24.4

24.6

24.7

24.8

24.9

24.9

24.9

24.8

24.8

24.8

24.8

24.8

24.8

24.7

24.6

24.5

24.4

24.2

24.0

23.6

23.3

23.1

23.0

23.0

23.0

22.9

Sep

22.8

22.7

22.6

22.5

22.4

22.3

22.2

22.1

22.1

22.0

--

--

--

--

--

--

22.0

22.0

22.1

22.1

22.2

22.2

22.3

22.4

22.4

22.5

22.5

22.5

22.6

22.6

Oct

22.6

22.6

22.6

22.5

22.4

22.3

22.2

22.1

22.0

21.9

21.8

21.7

21.6

21.5

21.3

21.1

20.9

20.7

20.6

20.4

20.3

20.3

20.2

20.1

20.0

20.0

20.0

19.9

19.9

19.9

19.8

Nov

19.8

19.7

19.6

19.6

19.5

19.5

19.4

19.3

19.3

19.1

19.0

18.9

18.7

--

--

--

--

--

-

--

16.9

16.7

16.5

16.2

16.0

15.7

15.4

15.1

14.9

14.6

Dec

14.3

14.1

13.7

13.4

13.1

12.7

12.2

11.8

11.2

10.6

9.9

9.1

8.5

7.8

7.2

6.5

6.0

5.7

5.3

5.1

5.1

4.9

4.9

4.8

4.8

4.9

4.8

4.6

4.5

4.4

4.3

TABLES 221
Table 14n. Mean daily ground-water temperature at site CRM-19 (map ID #16), Seminole Well Field, CedarRapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

4.2

4.0

3.8

3.4

3.2

3.0

2.8

2.7

2.6

2.5

2.3

2.2

2.1

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.1

1.0

1.0

1.0

0.9

0.9

0.9

0.8

Feb

0.8

0.8

0.8

0.7

0.7

0.7

0.7

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.5

0.5

0.4

0.4

--

--

0.2

0.2

0.2

0.3

-

--

_

Mar

0.3

0.3

0.3

0.2

0.2

0.2

0.2

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.4

0.4

0.4

0.4

0.4

0.4

0.4

--

--

0.9

0.9

0.9

1.0

1.2

1.3

1.3

1.5

Apr

1.6

1.6

1.7

1.7

1.7

1.6

1.6

1.7

1.7

1.7

1.7

1.7

1.7

1.7

1.7

1.7

1.8

1.8

1.8

1.8

1.9

1.9

2.0

2.0

2.2

2.3

2.5

2.7

2.7

2.7

..

May

2.7

2.7

2.7

2.8

2.9

3.3

4.1

5.4

6.8

7.9

8.6

9.3

10.2

11.1

12.0

12.6

12.9

13.4

14.0

14.5

14.9

15.4

15.7

16.1

16.2

16.3

16.5

16.5

16.5

16.6

16.8

Jun

1998

17.0

17.1

17.0

16.8

16.6

16.5

16.4

16.3

16.2

16.1

16.1

15.9

15.8

15.8

15.7

15.7

15.7

15.5

15.4

15.4

15.4

15.3

--

--

11.9

12.4

12.7

13.0

13.6

14.2

_.

Jul

14.7

15.3

15.3

16.0

16.6

17.2

17.8

18.2

18.7

19.1

19.4

19.7

20.0

20.2

20.1

20.4

17.2

15.0

15.0

15.1

15.2

15.5

15.2

15.3

15.4

15.5

15.6

15.7

15.7

15.8

15.9

Aug

16.0

16.0

16.0

16.1

16.2

16.2

16.4

16.5

16.7

17.0

17.3

17.6

17.9

18.2

18.5

18.8

19.0

19.2

19.6

19.7

19.6

19.7

20.0

20.7

21.2

21.6

22.1

22.6

23.0

23.2

23.5

Sep

23.8

23.9

23.8

23.7

23.7

23.6

23.5

23.5

23.4

23.4

23.3

23.3

23.2

23.2

23.2

23.2

23.1

23.1

23.1

23.1

23.0

23.0

22.9

22.9

22.8

22.8

22.7

22.6

22.6

22.5

..

Oct

22.5

22.5

22.4

22.4

22.3

22.3

22.3

22.2

22.4

22.7

22.8

22.8

22.7

22.5

22.3

22.1

21.9

21.7

21.4

21.2

21.0

20.7

20.4

20.1

19.9

19.6

19.4

19.2

19.0

18.7

18.5

Nov

18.3

18.1

17.9

17.7

17.6

17.5

17.4

17.3

17.3

17.2

17.2

17.1

17.0

16.9

16.8

16.8

16.7

16.6

16.5

16.4

16.2

16.0

15.8

15.6

15.5

15.3

15.1

15.0

14.8

14.7

..

Dec

14.5

14.3

14.1

13.9

13.7

13.5

13.2

12.9

12.6

12.3

11.9

11.6

11.3

10.9

10.6

9.7

8.3

7.2

6.7

6.7

6.8

7.0

7.2

7.4

7.6

7.8

7.8

7.9

8.0

8.0

7.9

222 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14n. Mean daily ground-water temperature at site CRM-19 (map ID #16), Seminole Well Field, Cedar Rapids, Iowa, 

January 1997 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

7.8

7.8

7.7

7.5

7.4

7.4

7.2

7.1

6.9

6.8

6.7

6.6

6.6

6.5

6.4

6.4

6.2

6.1

5.9

5.3

4.9

4.8

4.8

4.7

4.7

4.6

4.6

4.6

4.5

4.5

4.4

Feb Mar Apr May Jun Jul

1999

4.4

4.4

4.5

4.4

4.0

3.3

2.8

2.7

2.6

2.3

1.8

1.4

1.1

0.9

0.7

0.6

0.5

0.3

0.3

0.2

0.2

0.2

0.4

0.7

0.9

0.8

0.7

0.8

--

..

--

Aug Sep Oct Nov Dec

--

--

--

--

--

-

-

..

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

-

--

TABLES 223
Table 14o. Mean daily ground-water temperature at site CRM-20 (map ID #7 7), Northwest Well Field, Cedar Rapids, 

Iowa, February 1998 through March 1999

[Temperature in degrees Centigrade; , value not measured or not recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

-

-

..

-

-

-

--

..

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

-0.1

-0.1

-0.1

0.0

0.0

0.0

0.0

0.0

0.0

..

.-

_

Mar

0.0

0.0

0.0

0.0

-0.1

-0.1

-0.1

-0.1

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.1

0.2

0.2

0.4

0.5

0.7

1.0

1.2

1.4

1.6

1.9

2.1

2.4

2.5

2.3

Apr

2.4

2.5

2.6

3.0

4.9

7.2

8.4

9.0

8.9

8.3

7.9

8.0

8.6

9.3

9.6

9.5

9.4

9.7

10.2

10.8

11.3

11.3

10.8

10.6

10.8

11.1

11.3

11.3

11.5

11.8

._

May

11.7

11.2

10.7

9.7

8.0

6.0

4.6

4.2

4.3

4.4

4.6

4.9

5.2

5.5

5.9

6.5

7.1

7.6

8.2

8.6

9.0

9.4

9.8

10.2

10.7

11.4

12.7

14.2

15.4

16.3

17.1

Jun

1998

18.3

19.5

19.9

20.2

20.2

20.3

20.5

20.6

20.8

20.8

20.7

20.5

20.2

20.1

20.2

20.3

20.0

19.4

19.3

19.2

19.1

19.1

19.1

19.0

19.0

19.4

19.7

20.0

20.2

20.5

Jul

20.9

21.3

21.6

21.9

22.4

23.1

23.8

24.3

24.4

24.2

24.0

23.7

23.4

22.7

21.5

20.0

20.3

20.6

20.7

20.9

21.5

22.4

23.2

23.4

23.8

24.7

25.6

26.4

27.0

27.2

27.4

Aug Sep

27.5

27.5

27.2

26.8

26.4

26.1

25.7

25.4

25.1

24.9

24.9

25.0

25.1

25.2

25.3

25.3

--

--

--

--

--

--

23.8

23.8

23.6

23.1

22.7

22.5

22.5

22.5

Oct

22.5

22.4

22.5

22.7

22.9

22.9

22.8

22.4

21.6

20.6

20.0

19.6

19.5

19.9

20.5

20.8

21.0

20.9

20.6

20.4

20.0

19.5

18.9

18.2

17.6

16.9

16.5

16.2

15.9

15.5

15.3

Nov

15.0

14.8

14.6

14.6

14.4

14.2

14.1

14.0

13.9

13.9

13.9

13.8

13.6

13.5

13.5

13.5

13.5

13.5

13.5

13.4

13.2

13.0

13.0

13.0

13.1

13.2

13.2

13.1

12.8

12.4

Dec

11.8

11.1

10.2

9.4

8.5

7.7

7.0

6.5

6.0

5.6

5.4

5.3

5.1

5.0

4.8

4.8

4.8

4.8

4.9

5.2

5.7

6.3

7.0

7.6

8.1

8.5

8.9

9.1

9.1

8.9

8.5

224 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14o. Mean daily ground-water temperature at site CRM-20 (map ID #17), Northwest Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

8.0

7.4

6.8

6.2

5.5

4.6

4.1

3.7

3.4

3.2

3.0

2.7

2.3

1.9

1.4

1.0

0.7

0.4

0.3

0.2

0.1

0.0

0.0

0.0

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

Feb

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-

~

-

Mar Apr May Jun Jul

1999

-0.1

-0.1

-0.1

-0.1

0.0

0.0

0.1

0.2

0.4

0.6

0.8

1.0

1.2

1.3

1.4

1.3

1.2

1.2

1.2

1.3

1.6

1.9

2.3

2.5

2.6

2.6

2.6

2.5

2.3

2.1

1.8

Aug Sep Oct Nov Dec

-

-

-

-

-

..

..

--

-

-

~

-

~

--

--

..

-

~

-

-

-

-

-

-

-

-

-

~

-

-

TABLES 225
Table 14p. Mean daily ground-water temperature at site CRM-21 (map ID #18), Northwest Well Field, Cedar Rapids, 

Iowa, February 1998 through March 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

--

--

-

--

--

-

-

7.1

7.0

6.9

6.9

6.9

6.9

6.9

6.8

6.8

6.9

6.6

6.0

5.7

5.8

5.8

5.8

5.8

5.8

5.9

--

--

_.

Mar

5.8

5.7

5.8

5.6

5.6

5.8

5.8

6.0

6.1

6.2

6.1

6.1

6.3

6.0

6.1

6.1

6.1

6.3

6.2

6.1

6.0

6.0

6.2

6.3

6.4

6.4

6.2

6.1

6.0

6.0

7.1

Apr

6.4

5.1

4.4

3.9

3.6

3.6

3.9

4.5

5.3

6.3

7.0

7.6

8.1

7.1

5.7

5.9

6.1

6.3

6.5

6.6

6.8

6.9

7.0

7.2

7.3

7.4

7.5

7.6

7.7

7.8

May

8.0

8.1

8.2

8.3

8.3

8.2

8.2

8.1

8.0

8.0

8.0

7.9

7.9

7.8

7.8

7.7

7.7

7.7

7.7

7.8

7.8

7.9

8.0

8.1

8.2

8.3

8.4

8.7

9.1

9.3

9.6

Jun

1998

9.9

10.4

10.8

11.2

11.6

12.0

12.4

12.7

12.9

13.0

13.4

13.6

13.8

13.9

14.1

14.2

14.4

14.5

14.5

14.5

14.4

14.4

14.3

15.5

21.4

23.0

24.2

24.8

24.2

15.9

Jul

14.1

15.3

19.9

20.0

14.8

14.5

14.5

14.6

14.6

14.6

14.6

14.7

14.6

14.3

14.1

14.0

14.0

14.0

14.0

14.0

14.0

14.0

14.0

14.0

13.9

13.7

13.5

13.3

13.2

13.0

12.8

Aug Sep

12.8

12.8

12.7

12.6

12.5

12.4

12.3

12.1

12.0

11.8

11.7

11.6

11.6

11.5

11.5

11.5

--

--

--

--

--

--

12.2

12.2

12.2

12.2

12.2

12.3

12.3

12.3

Oct

12.3

12.3

12.3

12.3

12.3

12.2

12.2

12.3

12.3

12.3

12.4

12.4

12.4

12.4

12.4

12.4

12.5

12.4

12.4

12.4

12.4

12.5

12.5

12.6

12.7

12.8

12.9

13.0

13.0

13.0

13.0

Nov

13.1

13.1

13.2

13.4

13.6

14.0

14.3

14.5

14.7

14.7

14.7

14.7

14.7

14.6

14.5

14.5

14.5

14.0

13.8

13.6

13.6

13.5

13.4

13.2

13.0

12.7

12.4

12.2

11.9

11.7

Dec

11.5

11.4

11.2

11.0

10.7

10.5

10.4

10.2

10.1

9.9

9.7

9.5

9.4

9.3

9.3

9.5

9.3

9.3

9.3

9.3

9.3

9.5

9.5

9.6

9.7

9.8

9.9

10.0

10.0

10.1

10.1

226 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14p. Mean daily ground-water temperature at site CRM-21 (map ID #18), Northwest Well Field, Cedar Rapids, 

Iowa, February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

10.2

10.3

10.3

10.4

10.5

10.8

10.9

10.9

11.0

11.0

11.0

11.0

11.1

11.1

11.2

11.2

11.2

11.2

11.3

11.2

11.3

11.2

11.2

11.1

11.2

11.2

11.2

11.2

11.2

11.2

11.2

Feb

11.2

11.2

11.1

11.1

11.1

11.1

11.1

11.0

11.0

10.9

10.9

10.9

10.8

10.8

10.7

10.6

10.5

10.5

10.3

10.1

9.7

9.1

8.3

7.4

6.8

6.4

6.1

6.0

--

--

--

Mar Apr May Jun Jul

1999

6.1

6.1

6.1

5.8

5.8

5.8

6.0

6.1

5.9

5.8

5.6

5.6

5.7

5.8

6.1

6.3

6.7

7.0

7.2

7.5

7.6

7.6

7.6

7.6

7.6

7.8

7.9

8.0

7.9

7.9

8.1

Aug Sep Oct Nov Dec

--

--

--

--

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 227
Table 14q. Mean daily ground-water temperature at site CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999

[Temperature in degrees Centigrade; , value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

-

--

--

-

--

--

--

--

7.1

7.0

6.9

6.9

6.9

6.9

6.9

6.8

6.8

6.7

6.1

5.5

5.1

5.5

5.5

5.4

5.5

5.5

5.5

--

--

_

Mar

5.4

5.4

5.5

5.4

5.4

5.6

5.6

5.8

5.9

6.0

6.0

6.0

6.0

5.9

5.7

5.5

5.7

5.8

5.9

5.8

5.9

5.9

6.0

6.0

6.1

6.1

5.8

5.8

5.7

5.7

6.8

Apr

6.2

--

--

3.9

3.6

3.6

3.9

4.5

5.3

6.3

7.0

7.6

8.1

8.1

8.5

8.9

9.2

9.5

9.7

9.9

9.9

9.9

10.0

11.7

11.1

11.0

11.0

11.0

11.0

10.9

..

May

10.9

10.9

10.8

--

10.4

10.4

10.4

10.4

10.3

10.3

10.3

10.3

10.1

9.9

9.6

9.3

9.1

9.4

10.8

12.9

15.1

16.2

16.3

16.3

16.4

16.6

16.8

17.0

17.9

18.6

19.3

Jun

1998

19.8

20.3

20.8

20.6

20.5

20.5

20.4

20.4

20.3

20.3

20.7

20.8

20.8

19.8

20.0

19.8

19.8

19.8

19.7

19.6

19.6

19.6

--

--

-

--

--

--

--

--

_.

Jul Aug

--

-

--

--

--

--

--

--

--

-

--

--

23.9

23.6

23.4

23.5

23.8

24.3

24.6

24.8

24.9

25.0

25.2

25.3

25.2

25.0

25.2

25.6

26.1

26.4

26.5

Sep

26.3

25.8

25.2

24.8

24.7

24.7

24.6

24.5

24.4

24.2

23.9

23.7

23.6

23.5

23.5

23.4

23.0

22.5

22.3

22.2

22.1

22.2

22.3

22.2

22.2

22.3

22.5

22.4

22.0

21.3

Oct

20.7

20.1

19.9

19.9

20.2

20.5

20.7

20.9

21.1

21.0

20.6

20.4

20.1

19.5

18.8

18.1

17.6

17.1

16.6

16.2

16.0

15.8

15.5

15.4

15.2

15.1

15.0

15.0

15.0

15.0

15.0

Nov

15.0

15.0

15.1

15.2

15.3

15.3

15.3

15.2

15.0

14.9

14.9

15.0

14.9

14.9

14.8

14.6

14.3

13.9

13.4

12.9

12.3

11.6

10.9

10.5

10.2

9.8

9.6

9.4

9.4

9.3

Dec

9.1

8.9

--

--

8.5

8.2

8.0

8.0

8.0

8.0

8.0

8.0

7.9

7.8

7.7

7.7

7.7

7.7

7.6

7.6

7.5

7.2

6.9

6.4

6.0

5.7

5.5

5.4

5.5

5.5

5.6

228 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14q. Mean daily ground-water temperature at site CRM-22 (map ID #19), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

5.7

5.7

5.7

5.7

5.7

5.7

5.6

5.5

5.3

5.0

4.8

4.6

4.5

4.2

3.9

3.6

3.2

2.8

2.5

2.2

1.8

1.7

1.3

1.1

0.9

0.7

0.6

0.4

0.4

0.2

0.2

Feb

0.1

0.1

0.0

0.0

0.0

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.1

-0.1

-0.1

-0.1

-0.1

0.0

0.0

~

~

-

Mar Apr May Jun Jul

1999

0.0

0.0

0.0

0.0

0.0

0.0

0.1

0.1

0.2

0.4

0.6

0.7

0.9

1.0

1.1

1.1

1.1

1.2

1.2

1.2

1.2

1.3

1.3

1.3

1.3

1.4

1.5

1.7

2.0

2.2

2.4

Aug Sep Oct Nov Dec

..

..

-

-

-.

..

-

~

-

-

-

..

..

-

-

-

-

~

-

-

-

-

-

~

-

~

-

-

TABLES 229
Table 14r. Mean daily ground-water temperature at site CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids, lov 

February 1998 through March 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

--

--

--

--

--

--

--

--

13.

13.

13.

13.

13.

13.

13.

13.

13.

13.

13.

13.

12.

12.

,1

,2

,2

,4

,7

.1

,8

8

8

8

9

3

9

6

12.6

12. 7

12.9

13.0

13.

..

--

_

1

Mar

13.2

13.3

12.9

12.6

12.4

12.2

12.1

12.0

12.0

11.9

11.8

11.8

11.8

11.9

11.7

11.4

11.3

11.3

11.2

11.3

11.3

11.2

11.3

11.4

11.5

11.5

11.4

11.4

11.1

10.9

10.5

Apr

10.2

--

--

9.5

9.4

9.4

9.5

9.5

9.5

9.4

9.4

9.5

9.4

9.4

9.3

9.2

9.2

9.2

9.2

9.0

8.8

8.8

9.0

9.2

9.3

9.4

9.1

9.1

9.2

9.1

..

May

9.1

9.0

9.0

--

8.7

8.6

8.7

8.8

8.7

8.7

8.8

8.9

8.8

8.6

8.5

8.4

8.4

--

-

8.6

8.7

8.7

8.7

8.7

8.8

8.8

8.8

8.8

9.1

9.2

9.6

Jun

1998

9.9

10.1

10.1

9.9

10.0

10.0

10.1

10.2

10.2

10.1

11.3

11.6

11.5

11.5

11.7

11.9

12.1

12.4

12.6

11.9

11.4

11.5

--

-

19.2

23.8

24.5

24.8

24.2

21.5

Jul

16.6

21.0

21.8

18.1

16.7

15.8

14.7

14.6

14.8

15.0

15.2

15.4

15.6

15.9

16.1

16.3

16.4

16.4

16.5

16.6

16.7

16.7

16.8

17.0

17.1

17.3

17.4

17.6

17.8

18.0

18.2

Aug Sep

18.3 16.7

18.3

18.3

18.4

18.4

18.4

18.4

18.3

18.2

18.2

18.1

18.1

18.1

18.2

18.2

18.2

--

-

17.1

17.0

17.0

17.0

17.0 16.9

17.0 16.8

17.0 16.7

17.0 16.6

17.0 16.5

16.9 16.4

16.9 16.4

16.8 16.4

16.8

Oct

16.4

16.3

16.3

16.3

16.3

16.3

16.3

16.1

16.3

16.3

16.3

16.2

16.3

16.5

16.7

16.8

16.8

16.9

16.9

17.0

16.8

16.6

16.4

16.3

16.2

16.1

16.1

16.1

16.0

16.1

16.1

Nov

16.0

16.0

15.9

15.9

15.9

15.9

15.8

15.8

15.8

15.8

15.8

15.5

15.4

15.2

15.1

15.0

14.9

14.7

14.6

14.5

14.3

14.2

14.1

14.1

14.1

14.0

14.0

14.0

13.9

13.9

_.

Dec

13.8

13.7

13.5

13.4

13.3

13.3

13.3

13.3

13.3

13.3

13.2

13.1

13.0

12.9

12.8

12.7

12.6

12.5

12.3

12.5

12.6

12.1

11.9

11.9

11.8

11.7

11.7

11.6

11.5

11.4

11.3

230 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14r. Mean daily ground-water temperature at site CRM-23 (map ID #20), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

11.3

11.2

11.1

11.0

10.9

10.8

10.8

11.1

10.9

10.7

10.7

10.6

10.5

10.5

10.6

10.5

10.3

10.3

10.2

10.2

10.2

10.2

10.3

10.3

10.2

10.2

10.2

10.1

10.1

10.1

10.1

Feb

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.0

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.1

10.2

10.2

10.2

10.2

10.2

10.2

10.2

10.3

10.3

10.3

--

--

--

Mar Apr May Jun Jul

1999

10.3

10.4

10.4

10.4

10.4

10.4

10.4

10.5

10.5

10.5

10.5

10.6

10.6

10.6

10.7

10.7

10.7

10.7

10.7

10.9

11.1

11.3

11.4

11.5

11.6

11.6

11.6

11.4

11.2

11.2

11.1

Aug Sep Oct Nov Dec

__

--

--

--

--

--

--

--

--

-

--

--

--

--

..

--

..

--

--

--

--

--

..

--

..

--

--

--

--

--

-

TABLES 231
Table 14s. Mean daily ground-water temperature at site CRM-24 (map ID #21), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb Mar Apr

21.3 10.1

21.3 9.6

21.3

21.3

21.2

21.0

20.7

20.4

19.9

19.2

18.5

17.7

16.9

16.0

15.3

14.8

14.7

14.8

14.8

14.8

14.8

21.6 14.5

21.7 14.5

21.6 14.5

21.5 14.3

21.5 13.6

21.4 12.9

21.4 12.3

11.7

11.3

10.7

May

--

--

--

--

8.4

8.4

8.3

8.3

8.3

8.2

8.2

8.1

8.0

8.0

8.0

8.0

7.9

7.7

7.5

7.4

7.1

6.8

6.8

6.9

6.9

6.9

6.9

6.9

6.8

6.7

6.6

Jun

1998

6.6

6.6

6.7

6.8

6.9

6.9

6.9

7.0

7.0

7.0

7.1

7.3

7.6

8.1

17.6

12.5

9.0

9.5

10.1

10.5

10.5

10.6

--

-

--

--

-

--

--

--

Jul Aug

--

--

--

--

--

--

--

--

--

19.8

20.0

20.2

20.7

21.0

21.2

21.5

21.8

21.9

22.2

22.4

22.6

22.8

23.0

23.2

23.4

23.6

23.7

23.8

23.9

23.9

Sep

23.9

23.9

23.9

23.8

23.8

23.6

23.5

23.4

23.6

23.7

23.8

23.9

24.0

24.1

24.2

24.2

24.3

24.4

24.5

24.4

24.4

24.6

24.8

24.9

25.0

25.0

25.1

25.1

25.0

25.0

Oct

24.9

24.8

24.7

24.6

24.4

24.3

24.2

24.1

24.1

24.0

23.9

23.7

23.7

23.7

23.6

23.4

23.4

23.3

23.2

23.1

23.0

23.0

22.9

22.9

22.8

22.7

22.7

22.6

22.6

22.6

22.5

Nov

22.5

22.5

22.5

22.5

22.4

22.4

22.4

22.3

22.2

22.2

22.2

22.2

22.2

22.2

22.1

22.0

21.8

21.6

21.4

21.2

21.0

20.7

20.6

20.4

20.2

20.0

19.9

19.8

19.7

19.5

Dec

19.4

--

--

--

19.2

19.0

18.9

18.8

18.8

18.7

18.7

18.8

18.6

18.4

18.3

18.0

17.8

17.5

17.3

17.0

16.7

16.3

16.0

15.7

15.3

14.9

14.5

14.1

13.8

13.5

13.1

232 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14s. Mean daily ground-water temperature at site CRM-24 (map ID #21), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

12.8

12.5

12.2

11.9

11.6

11.3

11.1

10.8

10.6

10.4

10.1

9.9

9.7

9.4

9.1

8.8

8.5

8.3

8.0

7.7

7.3

7.0

6.8

6.6

6.5

6.4

6.4

6.3

6.2

6.2

6.1

Feb Mar Apr May Jun Jul

1999

6.2

6.2

6.1

6.1

6.0

5.9

5.7

5.5

5.4

5.3

5.2

5.1

4.9

4.6

4.3

4.0

3.8

3.5

3.2

3.0

2.7

2.5

2.2

2.0

l.g

1.6

1.4

1.2

--

--

--

Aug Sep Oct Nov Dec

--

--

--

--

--

--

--

--

--

--

--

--

-

-

-

--

--

--

--

--

--

--

--

--

--

--

--

--

--

--

TABLES 233
Table 14t. Mean daily ground-water temperature at site CRM-25 (map ID #22), Seminole Well Field, Cedar Rapids, low 

February 1998 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb

--

--

~

--

--

~

--

--

--

--

--

--

--

9.1

9.0

9.0

9.0

9.0

9.0

8.9

8.9

9.0

9.0

9.0

8.6

8.8

9.4

8.7

--

--

..

Mar

9.3

9.4

9.3

9.3

9.3

9.3

9.2

9.1

9.1

9.1

9.0

8.9

8.6

8.3

8.2

8.1

8.1

8.0

8.0

8.0

8.0

7.8

7.7

8.1

8.6

8.3

8.0

8.0

8.1

8.3

7.3

Apr

7.0

7.1

7.3

8.1

8.3

7.8

8.5

8.6

8.6

8.5

8.4

8.4

8.5

8.4

8.5

8.4

8.4

8.4

8.4

8.4

8.5

8.6

8.7

8.7

8.7

8.7

8.7

8.7

8.7

8.7

May

8.7

8.8

8.8

8.8

8.8

8.8

8.8

8.9

8.9

8.9

9.0

9.0

9.0

9.1

9.1

9.2

9.2

9.3

9.3

9.4

9.4

9.5

9.5

9.6

9.6

9.7

9.7

9.8

9.8

9.8

9.9

Jun

1998

9.9

9.9

10.0

10.0

10.1

10.2

10.2

10.3

10.3

10.3

10.3

10.5

11.2

11.1

10.8

10.6

10.5

10.6

10.6

10.7

10.7

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

11.0

Jul

11.1

11.2

11.2

11.2

11.1

11.1

11.1

11.2

11.2

11.3

11.3

11.4

11.4

11.5

11.6

11.7

11.8

11.9

12.1

12.2

12.3

12.4

12.6

12.7

12.9

13.0

13.1

13.0

13.0

13.1

13.4

Aug

13.6

13.7

13.8

13.7

13.7

13.6

13.9

14.1

14.1

14.1

14.2

14.3

14.4

14.4

14.4

14.5

14.4

14.6

14.7

14.7

14.7

14.8

14.8

14.9

14.9

14.8

14.8

14.7

14.9

15.0

15.0

Sep

15.0

15.1

15.2

15.3

15.3

15.4

15.5

15.5

15.6

15.6

15.6

15.6

15.6

15.4

15.6

15.6

15.7

15.7

15.7

15.8

15.9

15.9

15.9

15.9

15.9

16.0

16.0

16.0

16.0

16.0

Oct

16.1

16.1

16.1

16.0

15.8

16.0

16.1

16.0

16.0

16.0

16.1

16.1

16.1

16.0

15.9

16.0

15.8

15.8

15.6

15.7

15.8

15.7

15.6

15.6

15.7

15.7

15.6

15.6

15.5

15.5

15.5

Nov

15.4

15.4

15.3

15.3

15.3

15.3

15.3

15.3

15.2

15.1

15.1

15.1

15.0

15.0

15.0

14.9

14.9

14.9

14.8

14.8

14.7

14.7

14.6

14.6

14.5

14.5

14.4

14.3

14.2

14.1

Dec

14.0

14.0

13.9

13.8

13.7

13.6

13.6

13.5

13.5

13.4

13.3

13.4

12.7

12.5

12.5

12.4

12.4

12.5

12.3

12.1

12.2

12.8

12.7

12.4

12.6

12.6

12.6

12.5

11.9

12.2

11.3

234 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14t. Mean daily ground-water temperature at site CRM-25 (map ID #22), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

11.4

12.1

11.2

11.1

11.5

11.0

11.8

11.8

11.7

11.7

11.7

11.3

11.0

11.0

11.0

10.9

10.9

10.8

10.7

10.7

10.6

10.6

10.6

10.5

10.4

10.3

10.3

10.2

10.0

10.1

10.1

Feb Mar Apr May Jun Jul

1999

10.1

10.1

9.9

9.8

9.9

9.8

9.8

9.8

9.7

9.7

9.8

9.5

9.4

9.5

9.4

9.4

9.3

9.3

9.3

9.2

9.1

9.1

9.1

9.2

9.5

9.3

9.3

9.4

--

--

--

Aug Sep Oct Nov Dec

--

--

--

..

--

--

--

..

--

..

--

--

--

--

--

--

--

--

--

--

-

--

--

..

--

--

--

..

--

TABLES 235
Table 14u. Mean daily ground-water temperature at site CRM-27 (map ID #24), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan Feb

--

..

..

--

--

--

--

..

--

--

--

..

..

13.2

13.2

13.1

13.1

13.1

12.8

12.4

12.4

12.6

12.8

12.9

12.8

12.7

12.4

12.7

..

--

_

Mar

13.0

12.4

12.4

12.4

12.3

12.4

12.3

12.2

12.0

12.0

12.0

12.1

10.3

9.2

8.9

8.6

8.4

8.2

8.0

7.9

7.9

7.9

7.9

7.9

7.9

7.9

8.1

7.4

7.1

5.5

5.4

Apr

5.8

6.9

6.8

6.6

6.6

6.6

6.5

6.5

6.3

6.2

6.1

6.0

5.9

5.8

5.7

5.6

5.5

5.5

5.4

5.4

5.4

5.4

5.4

5.4

5.4

5.4

5.4

5.4

5.4

5.5

..

May

5.5

5.6

5.6

5.6

5.7

5.7

5.7

5.7

5.8

5.9

6.0

6.0

6.1

6.3

6.4

6.5

6.6

6.7

6.7

6.7

6.7

6.8

6.8

6.9

6.9

7.0

7.1

7.3

7.4

7.4

7.5

Jun

1998

7.5

7.6

7.6

7.7

7.9

8.1

8.3

8.5

8.7

8.9

9.1

9.3

9.5

9.8

11.0

10.7

10.3

10.4

10.5

10.5

10.6

10.6

10.6

10.7

10.7

10.7

10.7

10.8

10.8

10.8

._

Jul

14.5

14.4

13.5

13.2

12.0

11.8

11.8

11.8

11.8

11.8

11.8

11.9

12.0

12.1

12.2

12.3

12.4

12.5

12.6

12.6

12.7

12.7

12.8

12.8

12.9

12.9

12.9

12.9

12.9

12.9

12.9

Aug

12.9

12.9

13.0

13.0

13.1

13.1

13.2

13.2

13.2

13.3

13.3

13.4

13.4

13.5

13.5

13.6

13.7

13.8

13.8

13.9

14.0

14.0

14.0

14.1

14.0

14.0

14.0

14.0

14.0

14.0

14.0

Sep

14.2

14.3

14.4

14.4

14.5

14.6

14.6

14.7

14.7

14.7

14.7

14.8

14.8

14.9

14.9

14.9

14.9

14.9

15.0

15.1

15.1

15.1

15.1

15.1

15.1

15.1

15.1

15.1

15.1

15.1

Oct

15.2

15.2

15.3

15.3

15.3

15.2

15.8

15.3

15.3

15.7

15.6

15.6

15.7

15.7

15.7

15.7

15.8

15.7

16.0

17.5

17.6

18.0

18.3

18.3

18.1

17.8

17.5

17.4

17.4

17.3

17.4

Nov

17.2

17.2

17.3

17.3

17.3

17.3

17.2

17.2

17.1

17.0

16.9

16.9

16.8

16.8

16.8

16.8

16.7

16.7

16.7

16.6

16.6

16.6

16.6

16.6

16.6

16.5

16.5

16.4

16.4

16.4

Dec

16.3

16.3

16.2

16.2

16.1

16.1

16.0

16.0

16.0

16.0

15.9

15.9

15.8

15.8

15.7

15.7

15.6

15.6

15.6

15.5

15.5

15.5

15.3

15.3

15.3

15.4

15.3

15.2

15.1

15.0

15.0

236 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14u. Mean daily ground-water temperature at site CRM-27 (map ID #24), Seminole Well Field, Cedar Rapids, Iowa, 

February 1998 through February 1999-Continued

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

14.9

14.9

14.8

14.8

14.7

14.7

14.7

14.6

14.7

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.6

14.5

14.5

14.5

14.5

14.5

14.5

Feb

14.5

14.5

14.5

14.5

14.5

14.5

14.5

14.5

14.5

14.5

14.4

14.3

14.4

14.4

14.3

14.3

14.3

14.3

14.3

14.2

14.3

14.2

14.2

14.2

14.2

14.3

14.1

14.0

--

--

--

Mar Apr May Jun Jul Aug Sep Oct Nov Dec

1999

--

--

--

--

--

..

--

..

--

..

--

--

--

--

--

--

--

--

--

--

--

-

--

--

--

..

--

--

--

-

TABLES 237
Table 14v. Mean daily water temperature in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999

[Temperature in degrees Centigrade; --, value not measured or not recorded]

Day Jan

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Feb Mar Apr

6.0

6.7

8.1

7.4

6.9

7.3

6.8

7.0

8.0

9.3

11.4

13.2

11.7

9.3

7.5

8.6

10.7

12.1

12.0

11.2

11.0

12.5

12.5

13.4

13.8

12.0

12.2

12.6

10.0

9.4

..

May Jun Jut

1996

11.6 -- 27.0

11.7 -- 26.8

11.0 -- 26.2

12.4 -- 26.0

13.6 -- 25.7

12.9 -- 25.6

26.3

25.8

23.6

23.0

23.5

24.2

24.6

24.5

24.6

25.4

25.4

26.9

28.3

25.3

23.3

23.4

24.3

25.0

24.3

24.6

24.5

25.0 24.1

26.3 24.6

27.1 24.8

24.2

Aug

24.1

24.8

25.3

24.1

24.3

26.8

28.0

27.0

26.6

25.6

24.3

25.0

25.8

26.4

25.3

24.4

24.7

23.7

22.6

23.5

25.9

26.7

25.6

24.6

24.6

24.8

24.4

24.0

24.5

24.4

24.2

Sep

24.3

24.8

24.8

25.2

25.5

25.4

24.9

24.2

22.9

23.0

23.3

20.0

17.8

17.3

17.8

18.3

18.4

18.5

18.3

18.1

17.5

17.6

18.0

17.5

16.0

14.2

13.6

14.1

14.7

16.0

..

Oct

17.4

17.2

14.6

13.7

13.9

15.8

15.6

13.5

13.6

12.3

11.6

12.7

15.2

16.6

16.9

17.2

16.5

12.2

10.4

10.3

11.0

10.4

8.7

8.0

9.3

11.8

12.9

11.5

11.1

--

5.9

Nov

3.9

3.1

3.2

4.4

5.4

6.6

6.5

5.6

4.4

2.8

1.5

0.8

0.6

0.1

0.0

3.2

5.3

3.2

2.0

1.6

1.3

0.9

1.2

1.4

0.2

0.1

0.1

0.1

0.1

0.1

_.

Dec

0.1

-0.1

-

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

238 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14v. Mean daily water temperature in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

Feb

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

0.0

"

-

_

Mar Apr

0.0

0.0

"

-

11.4

9.7

7.1

6.4

5.7

5.2

3.9

3.2

4.5

6.3

7.7

8.3

8.6

9.4

10.6

11.6

11.6

12.2

12.6

12.7

13.2

13.7

14.1

14.8

15.8

15.0

May

12.4

12.1

11.0

11.6

13.1

14.1

14.2

14.0

13.7

13.8

14.3

13.7

13.4

12.5

11.5

11.8

13.6

15.4

16.0

16.0

16.6

17.2

17.8

18.3

17.5

15.0

13.5

13.1

13.0

13.7

15.8

Jun

1997

17.9

19.4

20.5

21.3

21.2

20.8

20.5

20.8

21.2

21.9

22.3

22.2

23.3

23.4

23.7

23.7

23.3

24.3

24.2

24.8

25.5

25.5

26.2

25.5

25.0

24.6

24.7

25.0

25.2

24.4

..

Jul

26.0

25.7

23.4

21.5

20.6

21.5

21.9

23.2

23.4

22.5

23.2

24.4

25.2

26.2

26.8

27.4

27.3

27.7

27.6

27.2

27.1

25.6

25.2

25.6

26.2

28.2

29.2

28.1

26.7

25.4

24.7

Aug

24.4

25.3

26.3

26.8

25.9

24.2

24.0

24.2

23.9

23.6

22.2

20.9

21.8

22.1

23.2

25.5

25.2

23.3

21.9

21.7

21.7

22.0

22.0

23.2

23.6

23.1

23.0

24.0

24.0

24.0

25.4

Sep

25.9

25.0

22.3

21.3

20.8

22.1

23.0

21.5

21.0

20.5

20.2

20.3

19.9

20.5

21.3

22.2

22.6

21.7

21.8

19.8

18.3

17.9

17.2

16.9

17.6

18.5

18.9

19.2

17.6

16.7

_.

Oct

16.6

17.3

19.7

20.5

20.2

21.1

21.6

21.1

19.6

17.4

17.2

18.0

15.9

12.7

11.7

11.6

11.5

11.3

11.2

10.6

9.8

8.7

8.9

9.4

8.7

5.9

4.0

4.4

5.4

6.5

8.1

Nov

8.5

6.8

4.8

4.1

3.9

4.2

5.2

6.0

6.0

4.8

3.2

2.1

2.1

2.0

1.5

0.3

-0.1

0.2

0.5

1.3

1.9

1.6

0.7

0.0

0.9

2.3

2.3

3.4

4.4

4.6

_.

Dec

4.0

3.5

2.9

1.9

0.5

-0.3

-0.3

-0.3

-0.1

0.4

1.0

0.6

-0.3

-0.4

-0.2

0.0

0.4

0.7

1.1

1.4

0.3

0.1

0.4

0.1

-0.2

-0.2

-0.4

-0.4

-0.4

-0.4

-0.4

TABLES 239
Table 14v. Mean daily water temperature in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

1.1

0.8

0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

Feb

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

-0.4

0.0

0.5

1.0

2.0

3.0

2.9

4.2

4.4

3.8

3.6

3.6

3.2

2.7

3.5

4.4

5.3

6.2

6.1

4.7

-

--

Mar

3.8

3.5

3.2

3.2

3.1

3.2

3.1

2.1

0.8

0.2

0.1

-0.1

0.5

1.0

1.5

2.0

2.2

2.2

2.4

2.9

3.7

5.0

5.5

4.9

5.7

8.6

10.6

10.9

11.8

13.1

12.5

Apr

10.3

8.6

7.7

7.5

8.4

9.6

10.4

10.4

9.3

9.2

9.8

10.9

11.6

12.2

12.5

10.8

10.0

10.8

11.4

11.6

11.2

11.6

12.6

13.8

14.6

14.5

13.0

12.4

12.3

12.6

May

14.3

14.9

14.1

15.4

17.3

17.5

16.4

16.7

17.8

18.4

18.8

19.4

19.9

20.6

21.5

21.0

21.3

22.3

23.8

22.8

21.8

19.7

18.3

17.3

17.5

18.4

19.3

21.0

22.1

22.4

22.5

Jun

1998

21.0

20.2

18.9

17.3

16.7

16.6

17.4

17.4

16.1

16.8

17.9

18.5

19.6

19.7

19.1

19.1

19.0

19.0

19.2

20.7

21.4

21.4

21.7

22.4

23.4

24.4

25.7

26.1

25.4

24.4

Jul

24.1

23.9

23.8

23.3

22.4

22.5

23.6

24.3

25.0

25.4

25.6

25.5

25.8

26.4

26.9

27.0

26.6

27.1

27.8

28.3

28.6

27.5

26.4

25.5

24.3

24.0

24.7

25.5

26.0

25.4

24.8

Aug Sep

24.9

24.5

24.1

24.6

24.1

22.9

22.7

23.5

24.4

25.1

25.3

25.3

24.9

25.4

25.8

25.9

-

~

~

~

~

~

18.1

18.0

18.9

21.1

22.4

21.7

21.8

21.3

Oct

18.4

15.8

13.5

12.9

14.1

15.0

13.8

13.3

13.3

13.4

13.8

14.2

13.4

12.3

12.3

13.9

15.7

14.6

13.3

12.4

11.6

10.9

10.7

11.1

12.1

13.0

13.9

14.4

14.7

14.0

12.8

Nov

12.1

11.0

9.0

7.6

6.3

5.6

4.6

4.5

4.7

5.3

4.6

4.7

4.4

4.8

5.1

5.0

4.9

5.5

5.3

3.8

3.1

3.9

4.8

4.7

5.7

5.9

6.1

6.8

8.9

10.2

Dec

8.7

8.9

9.7

10.5

11.1

9.9

6.8

4.8

4.1

3.5

2.8

2.7

2.6

2.5

2.8

3.3

2.9

2.9

2.3

0.8

-0.1

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

240 SELECTED HYDROLOGIC DATA FROM THE CEDAR RAPIDS AREA
Table 14v. Mean daily water temperature in the Cedar River at site SW-2 (map ID #32), Seminole Well Field, Cedar 

Rapids, Iowa, April 1996 through March 1999

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Jan

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.2

-0.1

-0.2

-0.2

-0.1

-0.1

-0.1

-0.1

Feb

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

-0.1

0.2

0.4

2.3

1.7

0.0

0.2

1.7

2.7

2.1

2.0

1.7

1.2

1.0

1.0

0.7

0.5

0.7

1.7

3.0

3.3

-

--

~

Mar Apr May Jun Jul

1999

-

4.0

2.7

2.2

2.2

1.9

1.8

0.6

0.0

0.9

2.9

3.8

4.3

4.6

5.3

6.5

8.3

7.6

7.5

7.9

7.9

7.3

7.2

8.0

8.0

8.1

8.6

9.0

10.0

11.5

12.6

Aug Sep Oct Nov Dec

-

-

-

-

--

-

..

-

-

-

-

-

-

..

-

--

-

-

..

-

-

-

-

--

-

-

--

-

-

-

-

TABLES 241

* U.S. GOVERNMENT PRINTING OFFICE: 2000 573-088 / 56000 Region No. 8