Skip common site navigation and headers
United States Environmental Protection Agency
Total Maximum Daily Loads
Begin Hierarchical Links EPA Home ; Water ; Wetlands, Oceans, ; Watersheds ; TMDLs ; TMDL Reports End Hierarchical Links

National Section 303(d) List Fact Sheet

Click here to see metadata for this report.



Impaired Waters Listed by State

NOTE: Click on the underlined "State Name" value to see a State Report.
State Name Current
System (Electronic)
Version
Waters on List
ALABAMA 2004 color.gif 179
ALASKA 2004 color.gif 35
AMERICAN SAMOA 1998 color.gif 1
ARIZONA 2004 color.gif 68
ARKANSAS 2004 color.gif 189
CALIFORNIA 2006 color.gif 691
COLORADO 2004 color.gif 131
CONNECTICUT 2004 color.gif 265
DELAWARE 2004 color.gif 379
DISTRICT OF COLUMBIA 2006 color.gif 25
FLORIDA 2002 color.gif 827
GEORGIA 2004 color.gif 891
GUAM 1998 color.gif 3
HAWAII 2004 color.gif 244
IDAHO 2002 color.gif 1392
ILLINOIS 2006 color.gif 1058
INDIANA 2006 color.gif 1591
IOWA 2004 color.gif 213
KANSAS 2004 color.gif 1101
KENTUCKY 2004 color.gif 736
LOUISIANA 2004 color.gif 236
MAINE 2004 color.gif 294
MARYLAND 2004 color.gif 473
MASSACHUSETTS 2004 color.gif 803
MICHIGAN 2006 color.gif 430
MINNESOTA 2006 color.gif 1734
MISSISSIPPI 2004 color.gif 477
MISSOURI 2006 color.gif 32
MONTANA 2004 color.gif 413
N. MARIANA ISLANDS 1998 color.gif 2
NEBRASKA 2004 color.gif 150
NEVADA 2004 color.gif 129
NEW HAMPSHIRE 2006 color.gif 5211
NEW JERSEY 2004 color.gif 965
NEW MEXICO 2004 color.gif 188
NEW YORK 2004 color.gif 792
NORTH CAROLINA 2004 color.gif 658
NORTH DAKOTA 2004 color.gif 211
OHIO 2006 color.gif 267
OKLAHOMA 2004 color.gif 517
OREGON 2006 color.gif 1397
PENNSYLVANIA 2004 color.gif 6957
PUERTO RICO 2004 color.gif 86
RHODE ISLAND 2006 color.gif 166
SOUTH CAROLINA 2004 color.gif 866
SOUTH DAKOTA 2004 color.gif 165
TENNESSEE 2006 color.gif 960
TEXAS 2004 color.gif 307
UTAH 2004 color.gif 140
VERMONT 2006 color.gif 143
VIRGIN ISLANDS 2006 color.gif 66
VIRGINIA 2006 color.gif 2172
WASHINGTON 2004 color.gif 1714
WEST VIRGINIA 2004 color.gif 889
WISCONSIN 2006 color.gif 593
WYOMING 2004 color.gif 130
Total Number of Impaired Waters Reported: 40,752

Causes of Impairment

NOTE: Click on the underlined "Causes of Impairment Reported" value to see a listing of those waters with that cause of impairment. Click on the underlined "General Impairment Name" to see the detailed state-reported impairment names.
General Impairment Name Causes of Impairment Reported Percent of Reported
PATHOGENS color.gif 10143 15.02
MERCURY color.gif 8893 13.17
SEDIMENT color.gif 6390 9.46
METALS (OTHER THAN MERCURY) color.gif 6327 9.37
NUTRIENTS color.gif 5672 8.40
ORGANIC ENRICHMENT/OXYGEN DEPLETION color.gif 5517 8.17
PH color.gif 3821 5.66
CAUSE UNKNOWN - IMPAIRED BIOTA color.gif 3147 4.66
TEMPERATURE color.gif 2953 4.37
PCBS color.gif 2846 4.21
TURBIDITY color.gif 2220 3.29
HABITAT ALTERATION color.gif 1740 2.58
CAUSE UNKNOWN color.gif 1390 2.06
PESTICIDES color.gif 1324 1.96
SALINITY/TDS/SULFATES/CHLORIDES color.gif 1299 1.92
NOXIOUS AQUATIC PLANTS color.gif 888 1.31
FLOW ALTERATION color.gif 455 .67
TOXIC ORGANICS color.gif 347 .51
AMMONIA color.gif 339 .50
ALGAL GROWTH color.gif 339 .50
TOTAL TOXICITY color.gif 301 .45
DIOXINS color.gif 298 .44
TOXIC INORGANICS color.gif 267 .40
OTHER CAUSE color.gif 137 .20
OIL AND GREASE color.gif 135 .20
TASTE, COLOR AND ODOR color.gif 83 .12
CHLORINE color.gif 65 .10
FISH CONSUMPTION ADVISORY - POLLUTANT UNSPECIFIED color.gif 58 .09
TRASH color.gif 54 .08
NUISANCE EXOTIC SPECIES color.gif 43 .06
RADIATION color.gif 24 .04
CAUSE UNKNOWN - FISH KILLS color.gif 8 .01
NUISANCE NATIVE SPECIES color.gif 4 .01
HARMFUL ALGAL BLOOMS color.gif 3 .00
Total Causes of Impairment Reported Nationwide: 67,530

Approved TMDLs by General Pollutant
since October 1, 1995


NOTE: Click on the underlined "Number of TMDLs Approved" value to see a listing of those approved TMDLs for the pollutant. Click on the "General Pollutant Name" value to see a detailed list of pollutants and TMDLs.
General Pollutant Number of TMDLs Approved Percent of Reported
MERCURY color.gif 6042 18.09
PATHOGENS color.gif 5954 17.83
METALS (OTHER THAN MERCURY) color.gif 5507 16.49
NUTRIENTS color.gif 3461 10.36
SEDIMENT color.gif 2651 7.94
ORGANIC ENRICHMENT/OXYGEN DEPLETION color.gif 1610 4.82
PH color.gif 1386 4.15
SALINITY/TDS/SULFATES/CHLORIDES color.gif 1354 4.05
TEMPERATURE color.gif 1277 3.82
AMMONIA color.gif 959 2.87
PESTICIDES color.gif 927 2.78
TURBIDITY color.gif 733 2.19
CHLORINE color.gif 336 1.01
PCBS color.gif 277 .83
TOXIC INORGANICS color.gif 184 .55
OTHER CAUSE color.gif 167 .50
TOXIC ORGANICS color.gif 124 .37
TOTAL TOXICITY color.gif 92 .28
CAUSE UNKNOWN - IMPAIRED BIOTA color.gif 84 .25
HABITAT ALTERATION color.gif 83 .25
ALGAL GROWTH color.gif 67 .20
TRASH color.gif 44 .13
NOXIOUS AQUATIC PLANTS color.gif 22 .07
RADIATION color.gif 21 .06
DIOXINS color.gif 17 .05
OIL AND GREASE color.gif 12 .04
TASTE, COLOR AND ODOR color.gif 5 .01
NUISANCE EXOTIC SPECIES color.gif 2 .01
FISH CONSUMPTION ADVISORY - POLLUTANT UNSPECIFIED color.gif 1 .00
Total Nationwide Number of TMDLs Approved since October 1, 1995 reported to EPA: 33,399

Approved TMDLs by State
since October 1, 1995

NOTE: Click on the underlined "State Name" value to see a State Report. Click on the underlined "Number of TMDLs Approved" value to see a listing of those approved TMDLs for the state.
State Name Number of TMDLs Approved Percent of Reported
ALABAMA color.gif 230 .69
ALASKA color.gif 34 .10
AMERICAN SAMOA color.gif 3 .01
ARIZONA color.gif 73 .22
ARKANSAS color.gif 194 .58
CALIFORNIA color.gif 767 2.30
COLORADO color.gif 887 2.66
CONNECTICUT color.gif 84 .25
DELAWARE color.gif 545 1.63
DISTRICT OF COLUMBIA color.gif 354 1.06
FLORIDA color.gif 441 1.32
GEORGIA color.gif 1439 4.31
GUAM color.gif 1 .00
HAWAII color.gif 20 .06
IDAHO color.gif 1467 4.39
ILLINOIS color.gif 204 .61
INDIANA color.gif 547 1.64
IOWA color.gif 114 .34
KANSAS color.gif 2705 8.10
KENTUCKY color.gif 79 .24
LOUISIANA color.gif 570 1.71
MAINE color.gif 87 .26
MARYLAND color.gif 311 .93
MASSACHUSETTS color.gif 279 .84
MICHIGAN color.gif 84 .25
MINNESOTA color.gif 599 1.79
MISSISSIPPI color.gif 816 2.44
MISSOURI color.gif 132 .40
MONTANA color.gif 399 1.19
NEBRASKA color.gif 75 .22
NEVADA color.gif 58 .17
NEW HAMPSHIRE color.gif 5504 16.48
NEW JERSEY color.gif 442 1.32
NEW MEXICO color.gif 196 .59
NEW YORK color.gif 551 1.65
NORTH CAROLINA color.gif 125 .37
NORTH DAKOTA color.gif 36 .11
OHIO color.gif 716 2.14
OKLAHOMA color.gif 118 .35
OREGON color.gif 888 2.66
PENNSYLVANIA color.gif 4902 14.68
PUERTO RICO color.gif 27 .08
RHODE ISLAND color.gif 85 .25
SOUTH CAROLINA color.gif 420 1.26
SOUTH DAKOTA color.gif 243 .73
TENNESSEE color.gif 867 2.60
TEXAS color.gif 99 .30
UTAH color.gif 297 .89
VERMONT color.gif 72 .22
VIRGIN ISLANDS color.gif 29 .09
VIRGINIA color.gif 774 2.32
WASHINGTON color.gif 1019 3.05
WEST VIRGINIA color.gif 1962 5.87
WISCONSIN color.gif 87 .26
WYOMING color.gif 342 1.02
Total Nationwide Number of TMDLs Approved since October 1, 1995 reported to EPA: 33,399

Approved TMDLS by EPA Fiscal Year (October 1 through September 30) since October 1, 1995

Fiscal Year Number of TMDLs Approved Percent Approved
1996 color.gif 112 .34
1997 color.gif 341 1.02
1998 color.gif 400 1.20
1999 color.gif 344 1.03
2000 color.gif 1547 4.63
2001 color.gif 2576 7.71
2002 color.gif 2738 8.20
2003 color.gif 3076 9.21
2004 color.gif 3254 9.74
2005 color.gif 4274 12.80
2006 color.gif 4233 12.67
2007 color.gif 4212 12.61
2008 color.gif 6292 18.84


TMDL Document Search

Full Text Search of TMDL Documents is available here.


Water | Wetlands, Oceans ; Watersheds | Watershed Protection


Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us