Approved or Established TMDLs
A Total Maximum Daily Load (TMDL) is a calculation of the maximum amount of a pollutant that a waterbody can receive and still meet water quality standards.
This page provides links to sources and program contacts related to approved or established TMDLs for waterbodies located in jurisdictions covered under the EPA Construction General Permit (CGP) and Multi-Sector General Permit (MSGP).
Depending upon the TMDL for your receiving waterbody, you might be required to install additional stormwater controls specifically designed to achieve reductions in the pollutant(s) causing the impairment of your receiving water. Consult the requirements pertaining to discharges to impaired waters with TMDLs in the permit that applies to your facility or site:
Additional information about TMDLs and stormwater is available on EPA’s Total Maximum Daily Loads (TMDLs) and Stormwater webpage.
State/Territory TMDL Information
Nonauthorized State / Territory |
TMDL WLA |
Supplemental Information |
---|---|---|
Alabama—Indian Country only |
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Alaska—Indian Country; areas in Denali National Park and Preserve subject to construction by a federal operator |
Alaska Department of Environmental Conservation TMDL program |
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American Samoa |
Region 9: American Samoa TMDL Information Note: Currently, there are no TMDLs developed. |
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Arizona—Indian Country only |
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California—Indian Country only |
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Colorado—Federal operators; Indian Country only |
Colorado Department of Public Health and Environment TMDL Program |
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Connecticut—Indian Country only |
Connecticut Department of Environmental Protection TMDL program |
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Delaware—Federal operators only |
Delaware Department of Natural Resources and Environmental Control TMDL program |
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District of Columbia |
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Florida—Indian Country only |
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Guam |
Note: Currently, there are no TMDLs developed. |
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Idaho |
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Iowa—Indian Country only |
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Johnston Atoll |
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Kansas—Indian Country only |
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Louisiana—Indian Country only |
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Massachusetts |
Massachusetts Department of Environmental Protection TMDL program |
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Michigan—Indian Country only |
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Midway Islands |
Note: Currently, there are no TMDLs developed. |
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Minnesota—Indian Country only |
Region 5: Minnesota TMDL Listing and Contact |
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Mississippi—Indian Country only |
Mississippi Department of Environmental Quality TMDL program |
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Montana—Indian Country only |
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Nebraska—Indian Country only |
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Nevada—Indian Country only |
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New Hampshire |
New Hampshire Department of Environmental Services TMDL program |
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New Mexico |
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New York—Indian Country only |
New York Department of Environmental Conservation TMDL program |
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North Carolina—Indian Country only |
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North Dakota—Indian Country only |
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Northern Mariana Islands |
Region 9: Northern Mariana Islands TMDL Listing Note: Currently, there are no TMDLs developed. |
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Oklahoma—Indian Country; oil and gas operations |
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Oregon—Indian Country only |
Region 10: Oregon TMDL Listing and Contact |
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Puerto Rico |
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Rhode Island—Indian Country only |
Rhode Island Department of Environmental Management TMDL program |
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South Dakota—Indian Country only |
South Dakota Department of Environmental and Natural Resources TMDL program |
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Texas—Indian Country; oil and gas operations |
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Utah—Indian Country only |
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Vermont—Federal operators |
Vermont Department of Environmental Conservation TMDL program |
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Wake Island |
Note: Currently, there are no TMDLs developed. |
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Washington—Federal operators; Indian Country only |
Region 10: Washington TMDL Listing and Contact |
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Wisconsin—Indian Country only |
Region 5: Wisconsin TMDL Listing and Contact |
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Wyoming—Indian Country only |