You are here:EPA HomeWaterWATERSWater Quality Assessment and TMDL InformationNational Summary of State Information 

## Watershed Assessment, Tracking & Environmental ResultS http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control Last updated on Tuesday, August 14, 2012 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

1 of 31 8/14/2012 9:06 AMReturn to home page

On This Page Assessment Summary Water Quality by Waterbody TypeRivers and Streams Lakes, Reservoirs, and Ponds Bays and Estuaries Coastal Shoreline Ocean and Near Coastal Wetlands Great Lakes Shoreline Great Lakes Open Water Causes of Impairment Probable Sources Contributing to Impairments Previously Impaired Waters Now Attaining All Uses Impaired Waters Listed by State Cumulative TMDLs by Pollutant Approved TMDLs by State Cumulative Number of TMDLs Status of Available Data Used in This Report

For More Information:

Download Excel compatible information

Download GIS Information (Internet Explorer only) 

## National Summary of State Information

Depicted below are national summary tables and charts for available water quality data reported by the States to EPA under Section 305(b) and 303(d) of the Clean Water Act. This report displays the most current available reporting year data. Check theStatus of Available Data for more information.Frequent Questions About This Database (Integrated Report) About This Database (Separate Impaired and Assessed Waters Reports) Assessing Water Quality (Questions and Answers) Integrated Reporting Guidance Previous National Water Quality Reports EnviroMapper for Water AskWATERS EPA WATERS Homepage Exchange Network Assessment Database Statewide Statistical Surveys Statistical Survey Template(Excel, 585 KB) 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

2 of 31 8/14/2012 9:06 AM

### Assessed Waters of United States

Incomplete state reported information may lead to discrepancies and/or missing information in these reports. Description of this table

Size of Water

Rivers and Streams (Miles) Lakes,

Reservoirs, and Ponds (Acres)Bays and

Estuaries (Square Miles)Coastal

Shoreline (Miles)Ocean

and Near Coastal (Square Miles)Wetlands

(Acres) Great

Lakes Shoreline (Miles)Great

Lakes Open Water (Square Miles) Good Waters 449,972 5,868,017 11,076 1,746 968 208,944 78 62 Threatened Waters 6,369 38,681 17 805 Impaired Waters 514,816 13,038,033 21,575 7,263 1,016 1,107,261 4,353 53,270

Total Assessed Waters 971,156 18,944,731 32,668 9,010 1,984 1,317,011 4,431 53,332 Total Waters3,533,205 41,666,049 87,791 58,618 54,120 107,700,000 5,202 60,546 Percent of Waters Assessed 27.5 45.5 37.2 15.4 3.7 1.2 85.2 88.1 

### States Using a Statewide Statistical Survey Some states submit statewide statistical survey data, which use representative random samples to characterize the condition of an entire waterbody type. Statewide statistical survey data is not currently included in these summary tables.

Number of States Rivers and StreamsLakes as AcresBays and Estuaries

7 4 2 

## Summary of Water Quality Assessments for Each Waterbody Type National Summary Water Quality Attainment in Assessed Rivers and Streams Description of this table Description of this table 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

3 of 31 8/14/2012 9:06 AMAssessed Status Miles

Assessed 971,156 Unassessed 2,562,049 Total Miles 3,533,205 Attainment Status Good Threatened Impaired Total Miles Assessed 

### National Summary Designated Use Support in Assessed Rivers and Streams* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Miles AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Fish, Shellfish, And Wildlife Protection And Propagation 762,113 55.0 .5 44.5

Recreation 390,972 55.3 1.4 43.3 Agricultural 352,368 93.7 .6 5.8 Aquatic Life Harvesting 262,191 34.1 .3 65.6

Industrial 210,190 93.3 .0 6.7 Public Water Supply 187,694 73.9 .8 25.3

Other 99,646 84.5 .3 15.3

Aesthetic Value 26,074 88.8 .0 11.2 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

4 of 31 8/14/2012 9:06 AMExceptional Recreational

Or Ecological Significance 14,663 11.3 4.4 84.4 

### National Summary Causes of Impairment in Assessed Rivers and Streams Description of this table Cause of Impairment Group Miles Threatened or Impaired Pathogens 157,844 Sediment 106,057 Nutrients 101,269 Organic Enrichment/Oxygen Depletion 87,700 Polychlorinated Biphenyls (PCBs) 76,405 Habitat Alterations 75,578 Metals (other than Mercury) 72,335 Mercury 61,995 Flow Alteration(s) 50,479 Temperature 50,166 Cause Unknown 39,587 Cause Unknown - Impaired Biota 37,793 Salinity/Total Dissolved Solids/Chlorides/Sulfates 32,515 pH/Acidity/Caustic Conditions 29,330 Turbidity 28,126 Pesticides 17,097 Other Cause 17,082 Ammonia 12,701 Fish Consumption Advisory 10,029 Algal Growth 7,492 Total Toxics 7,226 Toxic Inorganics 6,834 Toxic Organics 4,886 Dioxins 4,318 Oil and Grease 2,740 Cause Unknown - Fish Kills 1,371 Nuisance Exotic Species 1,236 Taste, Color and Odor 934 Radiation 652 Chlorine 629 Noxious Aquatic Plants 295 Trash 238 Nuisance Native Species 127 Biotoxins 84 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

5 of 31 8/14/2012 9:06 AM

### National Summary

Probable Sources of Impairments in Assessed Rivers and Streams Description of this table Probable Source Group Miles Threatened or Impaired Agriculture 123,669 Atmospheric Deposition 101,015 Unknown 87,600 Hydromodification 58,915 Urban-Related Runoff/Stormwater 51,548 Natural/Wildlife 51,396 Municipal Discharges/Sewage 50,813 Unspecified Nonpoint Source 46,985 Habitat Alterations (Not Directly Related To Hydromodification) 32,415 Resource Extraction 26,264 Silviculture (Forestry) 19,444 Industrial 14,200 Construction 13,522 Other 10,179 Land Application/Waste Sites/Tanks 8,277 Legacy/Historical Pollutants 4,889 Spills/Dumping 2,420 Recreation And Tourism (Non-Boating) 1,741 Aquaculture 318 Groundwater Loadings/Withdrawals 178 Recreational Boating And Marinas 132 Military Bases 42 

### National Summary Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds Description of this table Description of this table 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

6 of 31 8/14/2012 9:06 AMAssessed Status Acres

Assessed 18,944,731 Unassessed 22,721,318 Total Acres 41,666,049 Attainment Status Good Threatened Impaired 13,038,033 Total Acres Assessed 18,944,731 

### National Summary Designated Use Support in Assessed Lakes, Reservoirs, and Ponds* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Acres AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Aquatic Life Harvesting 10,815,405 25.0 .5 74.5 Fish, Shellfish, And Wildlife Protection And Propagation 10,713,506 54.7 .3 45.0

Recreation 9,033,391 74.5 2.4 23.1 Public Water Supply 7,081,262 76.3 .6 23.1 Agricultural 5,346,340 90.4 .7 8.8

Industrial 4,395,330 89.1 .1 10.8

Other 3,210,515 69.7 .3 30.0

Aesthetic Value 1,203,376 52.9 .0 47.1 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

7 of 31 8/14/2012 9:06 AMExceptional

Recreational Or Ecological Significance 732,768 16.1 15.6 68.3 

### National Summary Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds Description of this table Cause of Impairment Group Acres Threatened or Impaired Mercury 7,449,617 Nutrients 3,567,824 Polychlorinated Biphenyls (PCBs) 2,839,876 Organic Enrichment/Oxygen Depletion 1,732,490 Metals (other than Mercury) 1,525,067 Turbidity 1,372,857 Algal Growth 1,220,553 pH/Acidity/Caustic Conditions 886,936 Sediment 718,144 Nuisance Exotic Species 680,604 Flow Alteration(s) 548,980 Pathogens 544,163 Fish Consumption Advisory 488,727 Salinity/Total Dissolved Solids/Chlorides /Sulfates 481,009 Habitat Alterations 443,402 Pesticides 352,495 Nuisance Native Species 272,318 Other Cause 270,437 Ammonia 210,127 Temperature 202,660 Taste, Color and Odor 147,143 Dioxins 119,568 Toxic Organics 94,686 Cause Unknown 60,496 Cause Unknown - Impaired Biota 58,062 Radiation 48,312 Noxious Aquatic Plants 45,734 Total Toxics 23,556 Biotoxins 17,258 Toxic Inorganics 8,035 Cause Unknown - Fish Kills 6,457 Trash 1,717 Oil and Grease 1,274 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

8 of 31 8/14/2012 9:06 AM

### National Summary

Probable Sources of Impairments in Assessed Lakes, Reservoirs, and Ponds Description of this table Probable Source Group Acres Threatened or Impaired Atmospheric Deposition 4,804,255 Unknown 3,199,313 Agriculture 1,821,113 Natural/Wildlife 1,355,736 Hydromodification 907,651 Other 867,056 Urban-Related Runoff/Stormwater 858,186 Municipal Discharges/Sewage 813,637 Legacy/Historical Pollutants 769,768 Unspecified Nonpoint Source 759,087 Resource Extraction 563,235 Habitat Alterations (Not Directly Related To Hydromodification) 360,800 Construction 319,470 Silviculture (Forestry) 242,583 Industrial 224,021 Spills/Dumping 194,422 Recreational Boating And Marinas 126,413 Commercial Harbor And Port Activities 109,240 Recreation And Tourism (Non-Boating) 107,766 Groundwater Loadings/Withdrawals 98,032 Land Application/Waste Sites/Tanks 77,106 Aquaculture 4,620 Military Bases 2,436 

### National Summary Water Quality Attainment in Assessed Bays and Estuaries Description of this table Description of this table 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

9 of 31 8/14/2012 9:06 AMAssessed Status Square Miles

Assessed 32,668 Unassessed 55,122 Total Square Miles 87,791 Attainment Status Square Miles Good Threatened Impaired Total Square Miles Assessed 

### National Summary Designated Use Support in Assessed Bays and Estuaries* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Square Miles AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Aquatic Life Harvesting 24,314 31.8 .1 68.1 Fish, Shellfish, And Wildlife Protection And Propagation 19,409 52.1 .1 47.8

Recreation 13,827 91.5 .0 8.5 Agricultural 3,807 96.1 .0 3.9

Industrial 3,766 96.1 .0 3.9

Other 3,432 92.7 .0 7.3 Exceptional Recreational Or Ecological Significance 533 .8 .0 99.2

Public Water Supply 328 47.8 .0 52.2 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

10 of 31 8/14/2012 9:06 AMAesthetic Value 114 86.6 .0 13.4 

### National Summary Causes of Impairment in Assessed Bays and Estuaries Description of this table Cause of Impairment Group Square Miles Threatened or Impaired Mercury 10,232 Pathogens 6,581 Polychlorinated Biphenyls (PCBs) 6,483 Organic Enrichment/Oxygen Depletion 5,217 Dioxins 3,896 Metals (other than Mercury) 1,975 Noxious Aquatic Plants 1,855 Pesticides 1,778 Algal Growth 1,412 Cause Unknown - Impaired Biota 1,160 Toxic Organics 925 Nutrients 882 Other Cause 782 Turbidity 378 Total Toxics 316 Flow Alteration(s) 299 Habitat Alterations 262 Sediment 199 Nuisance Exotic Species 92 pH/Acidity/Caustic Conditions 92 Cause Unknown 53 Temperature 35 Trash 31 Ammonia 31 Oil and Grease 16 Toxic Inorganics 6 Taste, Color and Odor 6 Salinity/Total Dissolved Solids/Chlorides/Sulfates5 

### National Summary Probable Sources of Impairments in Assessed Bays and Estuaries Description of this table Probable Source Group Square Miles Threatened or Impaired Atmospheric Deposition 7,530 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

11 of 31 8/14/2012 9:06 AMUnknown 5,447 Municipal Discharges/Sewage 4,406 Natural/Wildlife 4,225 Industrial 3,760 Other 3,630 Agriculture 3,028 Unspecified Nonpoint Source 2,607 Hydromodification 2,513 Habitat Alterations (Not Directly Related To Hydromodification) 2,057 Urban-Related Runoff/Stormwater 1,877 Legacy/Historical Pollutants 1,469 Resource Extraction 1,292 Recreational Boating And Marinas 1,053 Commercial Harbor And Port Activities 470 Groundwater Loadings/Withdrawals 158 Land Application/Waste Sites/Tanks 52 Spills/Dumping 26 Construction 16 Land Application/Waste Sites 1 Recreation And Tourism (Non-Boating) 0 Silviculture (Forestry) 0 Aquaculture 0 

### National Summary Water Quality Attainment in Assessed Coastal Shoreline Description of this table Description of this table 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

12 of 31 8/14/2012 9:06 AMAssessed Status Miles

Assessed 9,010 Unassessed 49,608 Total Miles 58,618 Attainment Status Good Threatened Impaired Total Miles Assessed 

### National Summary Designated Use Support in Assessed Coastal Shoreline* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Miles AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Aquatic Life Harvesting 8,027 14.8 .0 85.2

Recreation 2,183 78.6 .0 21.4 Fish, Shellfish, And Wildlife Protection And Propagation 1,516 75.4 .0 24.6

Other 680 73.9 .0 26.1 Exceptional Recreational Or Ecological Significance 328 80.1 .0 19.9

Industrial 308 78.2 .0 21.8

Aesthetic Value 235 100.0 .0 .0 Agricultural 50 .0 .0 100.0 Public Water Supply 49 .0 .0 100.0 

### National Summary Causes of Impairment in Assessed Coastal Shoreline Description of this table Cause of Impairment Group Miles Threatened or Impaired Mercury 6,473 Pathogens 1,114 Organic Enrichment/Oxygen Depletion 423 Metals (other than Mercury) 214 Turbidity 129 Nutrients 123 Algal Growth 91 Pesticides 71 Cause Unknown - Impaired Biota 70 pH/Acidity/Caustic Conditions 69 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

13 of 31 8/14/2012 9:06 AMOther Cause 65 Polychlorinated Biphenyls (PCBs) 35 Ammonia 21 Temperature 20 Toxic Organics 13 Oil and Grease 13 Sediment 5 

### National Summary Probable Sources of Impairments in Assessed Coastal Shoreline Description of this table Probable Source Group Miles Threatened or Impaired Unknown 427 Atmospheric Deposition 388 Municipal Discharges/Sewage 326 Urban-Related Runoff/Stormwater 270 Agriculture 142 Hydromodification 136 Industrial 127 Unspecified Nonpoint Source 120 Natural/Wildlife 100 Recreational Boating And Marinas 36 Other 34 Construction 23 Commercial Harbor And Port Activities 20 Recreation And Tourism (Non-Boating) 20 Spills/Dumping 13 Land Application/Waste Sites/Tanks 12 Resource Extraction 12 Legacy/Historical Pollutants 8 Aquaculture 5 

### National Summary Water Quality Attainment in Assessed Ocean and Near Coastal Description of this table Description of this table 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

14 of 31 8/14/2012 9:06 AMAssessed Status Square Miles

Assessed 1,984 Unassessed 52,136 Total Square Miles 54,120 Attainment Status Square Miles Good Threatened Impaired Total Square Miles Assessed 

### National Summary Designated Use Support in Assessed Ocean and Near Coastal* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Square Miles AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Recreation 1,537 98.0 .0 2.0 Fish, Shellfish, And Wildlife Protection And Propagation 1,329 59.0 .0 41.0

Aquatic Life Harvesting 1,270 38.3 .0 61.7

Other 476 57.8 .0 42.2 Agricultural 201 100.0 .0 .0 Public Water Supply 154 100.0 .0 .0 Exceptional Recreational Or Ecological Significance 99 100.0 .0 .0

Industrial 3 100.0 .0 .0 

### National Summary National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

15 of 31 8/14/2012 9:06 AM

### Causes of Impairment in Assessed Ocean and Near Coastal Description of this table Cause of Impairment Group Square Miles Threatened or Impaired Mercury 796 Organic Enrichment/Oxygen Depletion 579 Polychlorinated Biphenyls (PCBs) 531 Pesticides 525 Pathogens 80 Nuisance Exotic Species 35 Total Toxics 29 Turbidity 22 Metals (other than Mercury) 15 Toxic Organics 14 Habitat Alterations 10 Dioxins 9 Nutrients 7 pH/Acidity/Caustic Conditions 7 Temperature 1 Ammonia 1 

### National Summary Probable Sources of Impairments in Assessed Ocean and Near Coastal Description of this table Probable Source Group Square Miles Threatened or Impaired Atmospheric Deposition 777 Unknown 560 Urban-Related Runoff/Stormwater 452 Municipal Discharges/Sewage 116 Recreational Boating And Marinas 9 Unspecified Nonpoint Source 7 Recreation And Tourism (Non-Boating) 4 Industrial 4 Hydromodification 4 Construction 3 Spills/Dumping 2 Natural/Wildlife 1 Commercial Harbor And Port Activities 0 

### National Summary Water Quality Attainment in Assessed Wetlands Description of this table Description of this table 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

16 of 31 8/14/2012 9:06 AMAssessed Status Acres

Assessed 1,317,011 Unassessed 106,382,989 Total Acres 107,700,000 Attainment Status Good Threatened Impaired Total Acres Assessed 1,317,011 

### National Summary Designated Use Support in Assessed Wetlands* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Acres AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Fish, Shellfish, And Wildlife Protection And Propagation 1,310,226 15.6 .1 84.3

Recreation 1,135,615 51.7 5.9 42.4 Public Water Supply 543,566 88.3 .0 11.7 Exceptional Recreational Or Ecological Significance 141,544 8.3 44.6 47.2

Aquatic Life Harvesting 97,041 .3 .0 99.7

Industrial 82,390 23.1 .0 76.9

Other 67,123 1.1 .0 98.9 Agricultural 30,331 53.6 .6 45.7 

### National Summary National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

17 of 31 8/14/2012 9:06 AM

### Causes of Impairment in Assessed Wetlands Description of this table Cause of Impairment Group Acres Threatened or Impaired Organic Enrichment/Oxygen Depletion 926,402 Pathogens 476,087 Mercury 231,152 Metals (other than Mercury) 170,731 Habitat Alterations 107,432 Nutrients 68,593 Flow Alteration(s) 32,260 Toxic Inorganics 28,097 Total Toxics 12,659 Sediment 11,405 Salinity/Total Dissolved Solids/Chlorides/Sulfates8,518 Temperature 7,680 Turbidity 4,089 Algal Growth 3,891 Nuisance Exotic Species 2,988 Cause Unknown - Impaired Biota 1,263 Cause Unknown 1,000 Fish Consumption Advisory 1,000 Cause Unknown - Fish Kills 997 Noxious Aquatic Plants 940 pH/Acidity/Caustic Conditions 838 Polychlorinated Biphenyls (PCBs) 707 Other Cause 678 Trash 458 Pesticides 362 Toxic Organics 133 Radiation 2 

### National Summary Probable Sources of Impairments in Assessed Wetlands Description of this table Probable Source Group Acres Threatened or Impaired Unknown 707,582 Natural/Wildlife 563,032 Municipal Discharges/Sewage 464,479 Agriculture 369,637 Atmospheric Deposition 200,741 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

18 of 31 8/14/2012 9:06 AMIndustrial 195,840 Hydromodification 109,024 Resource Extraction 94,719 Other 65,874 Unspecified Nonpoint Source 63,901 Construction 13,971 Habitat Alterations (Not Directly Related To Hydromodification) 8,017 Groundwater Loadings/Withdrawals 3,045 Land Application/Waste Sites/Tanks 1,634 Recreation And Tourism (Non-Boating) 787 Urban-Related Runoff/Stormwater 2 Silviculture (Forestry) 2 

### National Summary Water Quality Attainment in Assessed Great Lakes Shoreline Description of this table

Assessed Status Miles Assessed 4,431 Unassessed 772 Total Miles 5,202 Description of this table

Attainment Status Good Threatened Impaired Total Miles Assessed 

### National Summary Designated Use Support in Assessed Great Lakes Shoreline* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use Group Miles AssessedPercent

Good Percent

Threatened Percent

Impaired % Good

% Threatened 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

19 of 31 8/14/2012 9:06 AM% Impaired

Aquatic Life Harvesting 4,064 .0 .0 100.0 Agricultural 3,131 100.0 .0 .0

Industrial 3,131 100.0 .0 .0

Other 3,131 100.0 .0 .0 Fish, Shellfish, And Wildlife Protection And Propagation 865 33.1 .0 66.9

Recreation 816 32.2 .0 67.8 Public Water Supply 336 100.0 .0 .0 

### National Summary Causes of Impairment in Assessed Great Lakes Shoreline Description of this table Cause of Impairment Group Miles Threatened or Impaired Polychlorinated Biphenyls (PCBs) 3,472 Dioxins 2,963 Mercury 2,194 Pesticides 1,975 Pathogens 492 Nutrients 315 Nuisance Exotic Species 290 Sediment 290 Fish Consumption Advisory 285 Habitat Alterations 170 Other Cause 152 Organic Enrichment/Oxygen Depletion 120 Algal Growth 25 Toxic Inorganics 5 

### National Summary Probable Sources of Impairments in Assessed Great Lakes Shoreline Description of this table Probable Source Group Miles Threatened or Impaired Atmospheric Deposition 3,400 Agriculture 536 Legacy/Historical Pollutants 427 Unknown 141 Municipal Discharges/Sewage 120 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

20 of 31 8/14/2012 9:06 AMLand Application/Waste Sites/Tanks 31 Industrial 31 Unspecified Nonpoint Source 8 Hydromodification 7 Urban-Related Runoff/Stormwater 2 Natural/Wildlife 0 

### National Summary Water Quality Attainment in Assessed Great Lakes Open Water Description of this table

Assessed Status Square Miles Assessed 53,332 Unassessed 7,214 Total Square Miles 60,546 Description of this table

Attainment Status Square Miles Good Threatened Impaired Total Square Miles Assessed 

### National Summary Designated Use Support in Assessed Great Lakes Open Water* * Waters assessed for more than one designated use are included in multiple designated use groups below. Description of this table Designated Use GroupSquare Miles AssessedPercent

Good Percent

ThreatenedPercent

Impaired% Good

% Threatened % Impaired Aquatic Life Harvesting 39,184 .0 .0 100.0 Agricultural 39,031 100.0 .0 .0

Industrial 39,031 100.0 .0 .0 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

21 of 31 8/14/2012 9:06 AMOther 39,031 100.0 .0 .0

Fish, Shellfish, And Wildlife Protection And Propagation 14,300 1.5 .0 98.5

Public Water Supply 151 100.0 .0 .0

Recreation 151 100.0 .0 .0 

### National Summary Causes of Impairment in Assessed Great Lakes Open Water Description of this table Cause of Impairment Group Square Miles Threatened or Impaired Polychlorinated Biphenyls (PCBs) 39,183 Dioxins 38,862 Mercury 29,968 Pesticides 29,661 Fish Consumption Advisory 14,087 Organic Enrichment/Oxygen Depletion 13,867 Total Toxics 192 Nuisance Exotic Species 25 

### National Summary Probable Sources of Impairments in Assessed Great Lakes Open Water Description of this table Probable Source Group Square Miles Threatened or Impaired Atmospheric Deposition 53,270 Legacy/Historical Pollutants 13,991 Urban-Related Runoff/Stormwater 13,867 Agriculture 4,373 Unknown 310 Other 25



### National Causes of Impairment

Description of this table NOTE:Click on a cause of impairment (e.g. algal growth) to see the specific state-reported causes that are grouped to make up this category.

Cause of Impairment Group Size of Assessed Waters with Listed Causes of Impairment

Rivers and Streams (Miles)Lakes,

Reservoirs, and Ponds (Acres)Bays and

Estuaries (Square Miles)Coastal

Shoreline (Miles)Ocean

and Near Coastal (Square Miles)Wetlands

(Acres)Great

Lakes Shoreline (Miles)Great

Lakes Open Water (Square Miles) Algal Growth 7,492 1,220,553 1,412 91 3,891 25 Ammonia 12,701 210,127 31 21 1 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

22 of 31 8/14/2012 9:06 AMBiotoxins 84 17,258

Cause Unknown 39,587 60,496 53 1,000 Cause Unknown - Fish Kills 1,371 6,457 997 Cause Unknown - Impaired Biota 37,793 58,062 1,160 70 1,263 Chlorine 629 Dioxins 4,318 119,568 3,896 9 2,963 38,862 Fish Consumption Advisory 10,029 488,727 0 1,000 285 14,087 Flow Alteration(s) 50,479 548,980 299 32,260 Habitat Alterations 75,578 443,402 262 10 107,432 170 Mercury 61,995 7,449,617 10,232 6,473 796 231,152 2,194 29,968 Metals (other than Mercury) 72,335 1,525,067 1,975 214 15 170,731 Noxious Aquatic Plants 295 45,734 1,855 940 Nuisance Exotic Species 1,236 680,604 92 35 2,988 290 25 Nuisance Native Species 127 272,318 Nutrients 101,269 3,567,824 882 123 7 68,593 315 Oil and Grease 2,740 1,274 16 13 Organic Enrichment/Oxygen Depletion 87,700 1,732,490 5,217 423 579 926,402 120 13,867 Other Cause 17,082 270,437 782 65 678 152 Pathogens 157,844 544,163 6,581 1,114 80 476,087 492 Pesticides 17,097 352,495 1,778 71 525 362 1,975 29,661 pH/Acidity/Caustic Conditions 29,330 886,936 92 69 7 838 Polychlorinated Biphenyls (PCBs) 76,405 2,839,876 6,483 35 531 707 3,472 39,183 Radiation 652 48,312 2 Salinity/Total Dissolved Solids/Chlorides /Sulfates 32,515 481,009 5 8,518

Sediment 106,057 718,144 199 5 11,405 290 Taste, Color and Odor 934 147,143 6 Temperature 50,166 202,660 35 20 1 7,680 Total Toxics 7,226 23,556 316 29 12,659 192 Toxic Inorganics 6,834 8,035 6 28,097 5 Toxic Organics 4,886 94,686 925 13 14 133 Trash 238 1,717 31 458 Turbidity 28,126 1,372,857 378 129 22 4,089



### National Probable Sources Contributing to Impairments Description of this table NOTE:Click on a source of impairment (e.g. agriculture) to see the specific state-reported sources that are grouped to make up this category. Probable Source Size of Assessed Waters with Probable Sources of Impairments 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

23 of 31 8/14/2012 9:06 AMGroup Rivers and Streams (Miles)Lakes,

Reservoirs, and Ponds (Acres)Bays and

Estuaries (Square Miles)Coastal

Shoreline (Miles)Ocean

and Near Coastal (Square Miles)Wetlands

(Acres)Great

Lakes Shoreline (Miles)Great

Lakes Open Water (Square Miles) Agriculture 123,669 1,821,113 3,028 142 369,637 536 4,373 Aquaculture 318 4,620 0 5 Atmospheric Deposition 101,015 4,804,255 7,530 388 777 200,741 3,400 53,270 Commercial Harbor And Port Activities 109,240 470 20 0 Construction 13,522 319,470 16 23 3 13,971 Groundwater Loadings/Withdrawals 178 98,032 158 3,045 Habitat Alterations (Not Directly Related To Hydromodification) 32,415 360,800 2,057 8,017 Hydromodification 58,915 907,651 2,513 136 4 109,024 7 Industrial 14,200 224,021 3,760 127 4 195,840 31 Land Application/Waste Sites 1

Land Application/Waste Sites/Tanks 8,277 77,106 52 12 1,634 31 Legacy/Historical Pollutants 4,889 769,768 1,469 8 427 13,991 Military Bases 42 2,436 Municipal Discharges/Sewage 50,813 813,637 4,406 326 116 464,479 120 Natural/Wildlife 51,396 1,355,736 4,225 100 1 563,032 0 Other 10,179 867,056 3,630 34 65,874 25 Recreation And Tourism (Non-Boating) 1,741 107,766 0 20 4 787 Recreational Boating And Marinas 132 126,413 1,053 36 9 Resource Extraction 26,264 563,235 1,292 12 94,719 Silviculture (Forestry) 19,444 242,583 0 2 Spills/Dumping 2,420 194,422 26 13 2 Unknown 87,600 3,199,313 5,447 427 560 707,582 141 310 Unspecified Nonpoint Source 46,985 759,087 2,607 120 7 63,901 8 Urban-Related Runoff/Stormwater 51,548 858,186 1,877 270 452 2 2 13,867



### National Previously Impaired Waters Now Attaining All Uses Description of this table NOTE:Click on the underlined "Number of Waters Attaining" value for a detailed list of those waters now attaining all uses. Cycle Attaining Number of Waters Attaining Number of Causes of Impairment Addressed 2002 23 24 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

24 of 31 8/14/2012 9:06 AM20034 7 2004 159 204 2005 107 234 2006 85 101 2007 233 396 2008339 420

2009318 489 2010 302 372 2011 168 201 2012 88 119



### Impaired Waters Listed By State

Description of this table State Name Number of Waters on 303(d) List Alabama 209 Alaska 35 American Samoa44 Arizona 79 Arkansas 224 California 691 Colorado 244 Connecticut 425 Delaware 101 District Of Columbia36 Florida 2,292 Georgia 215 Guam 47 Hawaii 309 Idaho 915 Illinois 1,057 Indiana 1,836 Iowa 474 Kansas 1,387 Kentucky 1,300 Louisiana 250 Maine 114 Maryland 184 Massachusetts 710 Michigan 2,352 Minnesota 1,144 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

25 of 31 8/14/2012 9:06 AMMississippi 180 Missouri 245 Montana 604 N. Mariana Islands24 Nebraska 260 Nevada 181 New Hampshire 1,449 New Jersey 716 New Mexico 196 New York 528 North Carolina 1,270 North Dakota 214 Ohio 267 Oklahoma 723 Oregon 1,397 Pennsylvania 6,957 Puerto Rico 165 Rhode Island 162 South Carolina 961 South Dakota 159 Tennessee 1,028 Texas 719 Utah 118 Vermont 126 Virgin Islands 87 Virginia 1,523 Washington 2,419 West Virginia 1,097 Wisconsin 593 Wyoming 111 Total: 41,153 impaired waters



### National Cumulative TMDLs by Pollutant This chart includes TMDLs since October 1, 1995.

Description of this table NOTE:Click on the underlined "Pollutant Group" value to see a detailed list of pollutants. Click on the underlined "Number of TMDLs" value to see a listing of those TMDLs for the pollutant Group. 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

26 of 31 8/14/2012 9:06 AMPollutant Group Number of TMDLs Number of Causes of Impairment Addressed Pathogens 10,572 10,848 Metals (other than Mercury) 8,589 8,782 Mercury 6,994 7,026 Nutrients 5,273 6,341 Sediment 3,735 4,359 Temperature 2,090 2,099 Organic Enrichment/Oxygen Depletion 1,957 2,067 pH/Acidity/Caustic Conditions 1,826 1,867 Salinity/Total Dissolved Solids/Chlorides /Sulfates 1,571 1,626

Turbidity 1,325 1,544 Pesticides 1,166 1,264 Ammonia 1,090 1,153 Polychlorinated Biphenyls (PCBs) 485 506 Chlorine 335 341 Other Cause 222 246 Toxic Inorganics 197 197 Toxic Organics 158 199 Cause Unknown - Impaired Biota 133 137 Total Toxics 103 111 Habitat Alterations 83 84 Trash 72 76 Algal Growth 71 78 Dioxins 27 28 Noxious Aquatic Plants21 22 Radiation 19 22 Oil and Grease 14 14 Cause Unknown 7 7 Nuisance Exotic Species 3 6 Fish Consumption Advisory 2 2 Total: 48,140 TMDLs; 51,052 Causes of Impairment Addressed



### Approved TMDLs By State National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

27 of 31 8/14/2012 9:06 AMThis chart includes TMDLs since October 1, 1995. Description of this table NOTE:Click on the state name to see a state report. Click on the Number of TMDLs to see a detailed list of the TMDLs.

State Name Number of TMDLs Alabama 284 Alaska 53 American Samoa 2 Arizona 84 Arkansas 241 California 1,535 Colorado 992 Connecticut 144 Delaware 576 District Of Columbia 369 Florida 855 Georgia 1,649 Guam 18 Hawaii 64 Idaho 1,913 Illinois 324 Indiana 959 Iowa 180 Kansas 2,892 Kentucky 240 Louisiana 750 Maine 301 Maryland 808 Massachusetts 485 Michigan 193 Minnesota 1,342 Mississippi 1,429 Missouri 288 Montana 950 Nebraska 92 Nevada 64 New Hampshire 6,006 New Jersey 616 New Mexico 302 New York 659 North Carolina 208 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

28 of 31 8/14/2012 9:06 AMNorth Dakota 107

Ohio 1,524 Oklahoma 500 Oregon 1,228 Pennsylvania 7,038 Puerto Rico 236 Rhode Island 176 South Carolina 477 South Dakota 313 Tennessee 1,207 Texas 219 Utah 307 Vermont 117 Virgin Islands 66 Virginia 1,358 Washington 1,385 West Virginia 3,463 Wisconsin 199 Wyoming 353 Total: 48,140 TMDLs



### National Cumulative Number of TMDLs EPA Fiscal Year starts October 1 and ends September 30.

Description of this table NOTE:Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.

Fiscal Year Number of TMDLs Number of Causes of Impairment Addressed 1996122 123 1997337 351 1998402 408 1999330 373 2000 1,556 1,581 2001 2,581 2,617 2002 2,739 2,822 2003 3,013 3,289 2004 3,383 3,639 2005 4,317 4,636 2006 4,216 4,566 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

29 of 31 8/14/2012 9:06 AM2007 4,326 4,655 20089,248 9,532 2009 4,401 4,627 2010 2,566 2,704 2011 2,820 3,137 2012 1,783 1,992 Total: 48,140 TMDLs; 51,052 Causes of Impairment Addressed 

### Status of Available Data Used in This Report

Description of this table State NameAssessed Waters Report YearImpaired Waters Report Year Alabama 2010 2010 Alaska 2010 2010 American Samoa 2010 2010 Arizona 2008 2008 Arkansas 2008 2008 California 2004 2006 Colorado 2010 2010 Connecticut 2010 2010 Delaware 2006 2006 District Of Columbia 2010 2010 Florida 2010 2010 Georgia 2010 2010 Guam 2010 2010 Hawaii 2006 2006 Idaho 2010 2010 Illinois 2008 2006 Indiana 2010 2008 Iowa 2010 2010 Kansas 2008 2010 Kentucky 2010 2010 Louisiana 2010 2006 Maine 2010 2010 Maryland 2002 2010 Massachusetts 2010 2010 Michigan 2010 2008 Minnesota 2010 2008 Mississippi 2010 2010 Missouri 2010 2010 Montana 2010 2010 N. Mariana Islands 2010 2010 Nebraska 2010 2010 Nevada 2006 2006 New Hampshire 2010 2010 New Jersey 2010 2010 New Mexico 2010 2010 New York 2010 2010 North Carolina 2010 2010 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

30 of 31 8/14/2012 9:06 AMNorth Dakota 2010 2010 Ohio 2010 2008 Oklahoma 2010 2010 Oregon 2006 2006 Pennsylvania 2006 2004 Puerto Rico 2010 2010 Rhode Island 2010 2010 South Carolina 2010 2010 South Dakota 2010 2010 Tennessee 2010 2010 Texas 2010 2010 Utah 2010 2006 Vermont 2008 2010 Virgin Islands 2010 2010 Virginia 2010 2010 Washington 2008 2008 West Virginia 2010 2010 Wisconsin 2006 2006 Wyoming 2010 2010

TMDL Document Search

Full Text Search of TMDL Documents 

### National Summary of State Information | WATERS | US EPA http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control

31 of 31 8/14/2012 9:06 AM