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### Impaired Waters Listed By State Description of this table Return to home pa g e On This Page Impaired Waters Listed by State Causes of Impairment for 303(d) Listed Waters 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 Impaired Waters and TMDL 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 the Status of Available Data for more information. Frequent Q uestio n About This Database (Integrated Report) About This Database (Separate Impaired a Assessed Waters Re p Assessing Water Qu a (Questions and Ans w Inte g rated Reportin g Guidance Previous National W a Quality Reports EnviroMapper for Wa AskWATERS EPA WATERS Homep Exchange Network Assessment Databas

State Name Number of Waters on 303(d) List Alabama 200 Alaska 32 American Samoa 42 Arizona 84 Arkansas 224 California 691 Colorado 198 

## Watershed Assessment , Tracking & Environmental ResultS htt p : // ias p ub.e p a. g ov / waters10 / attains

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_ t yp e=T Last u p dated on Monda y, Ma y 24 , 2010 

## Page 1 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TConnecticut 408 Delaware 101 District Of Columbia 27 Florida 827 Georgia 281 Guam 54 Hawaii 311 Idaho 1,057 Illinois 1,058 Indiana 1,836 Iowa 278 Kansas 1,333 Kentucky 1,089 Louisiana 250 Maine 206 Maryland 501 Massachusetts 837 Michigan 2,352 Minnesota 1,144 Mississippi 197 Missouri 204 Montana 677 N. Mariana Islands 71 Nebraska 177 Nevada 181 New Hampshire 1,089 New Jersey 745 New Mexico 187 New York 491 North Carolina 902 North Dakota 247 Ohio 267 Oklahoma 743 Oregon 1,397 Pennsylvania 6,957 Puerto Rico 166 Rhode Island 141 South Carolina 1,060 

## Page 2 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TTotal: 39,998 impaired waters


### Causes of Impairment for 303(d) Listed Waters Description of this table South Dakota 168 Tennessee 900 Texas 651 Utah 118 Vermont 131 Virgin Islands 77 Virginia 2,534 Washington 2,419 West Virginia 981 Wisconsin 593 Wyoming 106

NOTE: Click on a cause of impairment (e.g. pathogens) to see the specific state-reported causes that are grouped to make up this category. Click on th e "Number of Causes of Impairment Reported" to see a list of waters with that cause of impairment. Cause of Impairment Group Name Number of Causes of Impairment Reported Pathogens 10,761 Metals (other than Mercury) 7,503 Nutrients 6,847 Organic Enrichment/Oxygen Depletion 6,506 Sediment 6,293 Polychlorinated Biphenyls (PCBs) 6,177 Mercury 3,770 pH/Acidity/Caustic Conditions 3,712 Cause Unknown

- Impaired Biota 3,320 Turbidity 3,055 Temperature 3,044 Pesticides 1,798 Salinity/Total Dissolved Solids/Chlorides/Sulfates 1,745 Cause Unknown 1,259 Noxious Aquatic Plants 981 Habitat Alterations 702 Dioxins 549 Algal Growth 549 Toxic Organics 459 356 

## Page 3 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TTotal: 70,947 Causes of Impairment


### National Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995. Description of this table Ammonia Toxic Inorganics 352 Total Toxics 318 Other Cause 222 Oil and Grease 155 Taste, Color and Odor 115 Flow Alteration(s) 109 Trash 57 Fish Consumption Advisory 56 Biotoxins 53 Radiation 44 Chlorine 34 Nuisance Exotic Species 29 Cause Unknown

- Fish Kills 12 Nuisance Native Species 5

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. Pollutant Group Number of TMDLs Number of Causes of Impairment Addressed Pathogens 7,931 8,172 Metals (other than Mercury) 7,296 7,444 Mercury 6,796 6,828 Nutrients 4,525 5,405 Sediment 3,482 4,034 Organic Enrichment/Oxygen Depletion 1,816 1,895 pH/Acidity/Caustic Conditions 1,675 1,712 Temperature 1,573 1,580 Salinity/Total Dissolved Solids/Chlorides/Sulfates 1,523 1,564 Ammonia 1,075 1,138 

## Page 4 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TTotal: 41,465 TMDLs; 43,804 Causes of Impairment Addressed


### Approved TMDLs By State This chart includes TMDLs since October 1, 1995. Description of this table Pesticides 1,003 1,063 Turbidity 951 1,082 Polychlorinated Biphenyls (PCBs) 383 404 Chlorine 336 341 Other Cause 208 225 Toxic Inorganics 191 191 Cause Unknown

- Impaired Biota 173 177 Toxic Organics 126 127 Total Toxics 99 107 Habitat Alterations 83 84 Algal Growth 68 73 Trash 65 68 Dioxins 24 25 Noxious Aquatic Plants 21 22 Radiation 21 22 Oil and Grease 12 12 Cause Unknown 5 5 Fish Consumption Advisory 2 2 Nuisance Exotic Species 2 2

NOTE: Click on the state name to see a state report. Cli ck on the Number of TMDLs to see a detailed list of the TMDLs. State Name Number of TMDLs Alabama 265 Alaska 44 American Samoa 2 Arizona 69 Arkansas 232 California 994 Colorado 959 Connecticut 118 Delaware 559 District Of Columbia 360 

## Page 5 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TFlorida 709 Georgia 1,595 Guam 18 Hawaii 59 Idaho 1,658 Illinois 303 Indiana 768 Iowa 161 Kansas 2,727 Kentucky 125 Louisiana 671 Maine 300 Maryland 617 Massachusetts 426 Michigan 160 Minnesota 1,178 Mississippi 1,387 Missouri 162 Montana 698 Nebraska 91 Nevada 58 New Hampshire 5,518 New Jersey 598 New Mexico 227 New York 640 North Carolina 149 North Dakota 69 Ohio 1,342 Oklahoma 223 Oregon 1,035 Pennsylvania 6,476 Puerto Rico 53 Rhode Island 111 South Carolina 430 South Dakota 276 Tennessee 1,050 Texas 154 Utah 303 

## Page 6 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TTotal: 41,465 TMDLs



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

Total: 41,465 TMDLs; 43,804 Causes of Impairment Addressed


### Status of Available Data Used in This Report Description of this table Vermont 95 Virgin Islands 29 Virginia 1,045 Washington 1,167 West Virginia 2,562 Wisconsin 98 Wyoming 342

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 1996 122 123 1997 338 352 1998 403 409 1999 335 381 2000 1,561 1,586 2001 2,569 2,605 2002 2,747 2,822 2003 2,995 3,272 2004 3,384 3,650 2005 4,254 4,569 2006 4,207 4,559 2007 4,341 4,660 2008 9,241 9,530 2009 4,225 4,446 2010 743 840

State Name Assessed Waters Report Year Impaired Waters Report Year Alabama 2008 2008 

## Page 7 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TAlaska 2008 2008 American Samoa 2008 2008 Arizona 2008 2008 Arkansas 2008 2008 California 2004 2006 Colorado 2008 2008 Connecticut 2008 2008 Delaware 2006 2006 District Of Columbia 2008 2008 Florida 2002 2002 Georgia 2008 2008 Guam 2008 2008 Hawaii 2006 2006 Idaho 2008 2008 Illinois 2006 2006 Indiana 2008 2008 Iowa 2008 2006 Kansas 2008 2008 Kentucky 2008 2008 Louisiana 2008 2006 Maine 2008 2008 Maryland 2002 2006 Massachusetts 2006 2006 Michigan 2008 2008 Minnesota 2008 2008 Mississippi 2008 2008 Missouri 2008 2008 Montana 2006 2006 N. Mariana Islands 2008 2008 Nebraska 2008 2008 Nevada 2006 2006 New Hampshire 2008 2008 New Jersey 2008 2008 New Mexico 2008 2008 New York 2008 2008 North Carolina 2006 2006 North Dakota 2008 2008 Ohio 2008 2008 Oklahoma 2008 2008 Oregon 2006 2006 Pennsylvania 2006 2004 Puerto Rico 2008 2008 Rhode Island 2008 2008 South Carolina 2008 2008 South Dakota 2008 2008 Tennessee 2008 2008 Texas 2008 2008 

## Page 8 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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_ t yp e=TTMDL Document Search Full Text Search of TMDL Documents Utah 2006 2006 Vermont 2008 2008 Virgin Islands 2008 2008 Virginia 2008 2008 Washington 2008 2008 West Virginia 2008 2008 Wisconsin 2006 2006 Wyoming 2008 2008 

## Page 9 of 9 N ational Summary of Impaired Waters a nd TMDL Information | WATERS | US EPA

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