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 |
Region 4: Alabama TMDL Listing and Contact |
|
Alaska—Indian Country; areas in Denali National Park and Preserve subject to construction by a federal operator |
Region 10: Alaska TMDL Listing and Contact |
Alaska Department of Environmental Conservation TMDL program |
American Samoa |
Region 9: American Samoa TMDL Information and Contact Currently, there are no TMDLs developed. |
|
Arizona—Indian Country only |
Region 9: Arizona TMDL Listing and Contact |
|
California—Indian Country only |
Region 9: California TMDL Listing and Contact |
|
Colorado—Federal operators; Indian Country only |
Region 8 TMDL Listing and Contact |
Colorado Department of Public Health and Environment Water Quality Program |
Connecticut—Indian Country only |
Region 1: Connecticut TMDL Listing and Contact |
Connecticut Department of Environmental Protection TMDL program |
Delaware—Federal operators only |
Region 3: Delaware TMDL Listing and Contact |
Delaware Department of Natural Resources and Environmental Control TMDL program |
District of Columbia |
Region 3: District of Columbia TMDL Listing and Contact |
|
Florida—Indian Country only |
Region 4: Florida TMDL Listing and Contact |
|
Guam |
Region 9: Guam TMDL Listing and Contact Currently, there are no TMDLs developed. |
|
Idaho |
Region 10: Idaho TMDL Listing and Contact |
|
Iowa—Indian Country only |
Region 7: Iowa TMDL Listing and Contact |
|
Johnston Atoll |
||
Kansas—Indian Country only |
Region 7: Kansas TMDL Listing and Contact |
|
Louisiana—Indian Country only |
Region 6: Louisiana TMDL Listing and Contact |
|
Massachusetts |
Region 1: Massachusetts TMDL Listing and Contact |
Massachusetts Department of Environmental Protection TMDL program |
Michigan—Indian Country only |
Region 5: Michigan TMDL Listing and Contact |
|
Midway Islands |
Currently, there are no TMDLs developed. |
|
Minnesota—Indian Country only |
Region 5: Minnesota TMDL Listing and Contact |
|
Mississippi—Indian Country only |
Region 4: Mississippi TMDL Listing and Contact |
Mississippi Department of Environmental Quality TMDL program |
Montana—Indian Country only |
Region 8 TMDL Listing and Contact |
|
Nebraska—Indian Country only |
Region 7: Nebraska TMDL Listing and Contact |
|
Nevada—Indian Country only |
Region 9: Nevada TMDL Listing and Contact |
|
New Hampshire |
Region 1: New Hampshire TMDL Listing and Contact |
New Hampshire Department of Environmental Services TMDL program |
New Mexico |
Region 6: New Mexico TMDL Listing and Contact |
|
New York—Indian Country only |
Region 2: New York TMDL Listing and Contact |
New York Department of Environmental Conservation TMDL program |
North Carolina—Indian Country only |
Region 4: North Carolina TMDL Listing and Contact |
|
North Dakota—Indian Country only |
Region 8 TMDL Listing and Contact |
|
Northern Mariana Islands |
Region 9: Northern Mariana Islands TMDL Listing and Contact Currently, there are no TMDLs developed. |
|
Oklahoma—Indian Country; oil and gas operations |
Region 6: Oklahoma TMDL Listing and Contact |
|
Oregon—Indian Country only |
Region 10: Oregon TMDL Listing and Contact |
|
Puerto Rico |
||
Rhode Island—Indian Country only |
Region 1: Rhode Island TMDL Listing and Contact |
Rhode Island Department of Environmental Management TMDL program |
South Dakota—Indian Country only |
Region 8 TMDL Listing and Contact |
South Dakota Department of Environmental and Natural Resources TMDL program |
Texas—Indian Country; oil and gas operations |
Region 6: Texas TMDL Listing and Contact |
|
Utah—Indian Country only |
Region 8 TMDL Listing and Contact |
|
Vermont—Federal operators |
Region 1: Vermont TDML Listing and Contact |
Vermont Department of Environmental Conservation TMDL program |
Wake Island |
Currently, there are no TMDLs developed. |
|
Washington—Federal operators; Indian Country only |
Region 10: Washington TMDL Listing and Contact |
|
Wisconsin—Indian Country only |
Region 5: Wisconsin TMDL Listing and Contact |
|
Wyoming—Indian Country only |
Region 8 TMDL Listing and Contact |