NPDES State Program Authority
A state, territory, or tribe may receive authorization for one or more of the NPDES program components. The table below shows the status of state authorizations to date. In some cases, EPA may issue permits within a state that has received authorization. For instance, in almost all cases, EPA retains authority to implement the program on tribal lands.
- NPDES Program Authorizations -- A color-coded map showing the status of NPDES programs in states and territories.
| State or Territory | Authorized State NPDES Permit Program | Authorized to Regulate Federal Facilities | Authorized State Pretreatment Program | Authorized General Permits Program | Authorized Biosolids (Sludge) Program |
|---|---|---|---|---|---|
| Alabama | 10/19/1979 | 10/19/1979 | 10/19/1979 | 06/26/1991 | |
| Alaska | 10/31/2008 | 10/31/2008 | 10/31/2008 | 10/31/2008 | |
| American Samoa | |||||
| Arizona | 12/05/2002 | 12/05/2002 | 12/05/2002 | 12/05/2002 | 04/01/2004 |
| Arkansas | 11/01/1986 | 11/01/1986 | 11/01/1986 | 11/01/1986 | |
| California | 05/14/1973 | 05/05/1978 | 09/22/1989 | 09/22/1989 | |
| Colorado | 03/27/1975 | 03/04/1982 | |||
| Connecticut | 09/26/1973 | 01/09/1989 | 06/03/1981 | 03/10/1992 | |
| Delaware | 04/01/1974 | 10/23/1992 | |||
| District of Columbia | |||||
| Florida | 05/01/1995 | 05/01/2000 | 05/01/1995 | 05/01/1995 | |
| Georgia | 06/28/1974 | 12/08/1980 | 03/12/1981 | 01/28/1991 | |
| Guam | |||||
| Hawaii | 11/28/1974 | 06/01/1979 | 08/12/1983 | 09/30/1991 | |
| Idaho | 6/5/20181 | 7/1/2021 | 7/1/2018 | 7/1/20202 | 7/1/2021 |
| Illinois | 10/23/1977 | 09/20/1979 | 01/04/1984 | ||
| Indiana | 01/01/1975 | 12/09/1978 | 04/02/1991 | ||
| Iowa | 08/10/1978 | 08/10/1978 | 06/03/1981 | 08/12/1992 | |
| Kansas | 06/28/1974 | 08/28/1985 | 11/24/1993 | ||
| Kentucky | 09/30/1983 | 09/30/1983 | 09/30/1983 | 09/30/1983 | |
| Louisiana | 08/27/1996 | 08/27/1996 | 08/27/1996 | 08/27/1996 | |
| Maine | 01/12/2001 | 01/12/2001 | 01/12/2001 | 01/12/2001 | |
| Maryland | 09/05/1974 | 11/10/1987 | 09/30/1985 | 09/30/1991 | |
| Massachusetts | |||||
| Michigan | 10/17/1973 | 12/09/1978 | 06/07/1983 | 11/29/1993 | 09/28/20063 |
| Minnesota | 06/30/1974 | 12/09/1978 | 07/16/1979 | 12/15/1987 | |
| Mississippi | 05/01/1974 | 01/28/1983 | 05/13/1982 | 09/27/1991 | |
| Missouri | 10/30/1974 | 06/26/1979 | 06/03/1981 | 12/12/1985 | |
| Montana | 06/10/1974 | 06/23/1981 | 04/29/1983 | ||
| Nebraska | 06/12/1974 | 11/02/1979 | 09/07/1984 | 07/20/1989 | |
| Nevada | 09/19/1975 | 08/31/1978 | 07/27/1992 | ||
| New Hampshire | |||||
| New Jersey | 04/13/1982 | 04/13/1982 | 04/13/1982 | 04/13/1982 | |
| New Mexico | |||||
| New York | 10/28/1975 | 06/13/1980 | 10/15/1992 | ||
| North Carolina | 10/19/1975 | 09/28/1984 | 06/14/1982 | 09/06/1991 | |
| North Dakota | 06/13/1975 | 01/22/1990 | 09/16/2005 | 01/22/1990 | |
| Northern Mariana Islands | |||||
| Ohio | 03/11/1974 | 01/28/1983 | 07/27/1983 | 08/17/1992 | 03/16/20054 |
| Oklahoma5 | 11/19/1996 | 11/19/1996 | 11/19/1996 | 09/11/1997 | 11/19/1996 |
| Oregon | 09/26/1973 | 03/02/1979 | 03/12/1981 | 02/23/1982 | |
| Pennsylvania | 06/30/1978 | 06/30/1978 | 08/02/1991 | ||
| Puerto Rico | |||||
| Rhode Island | 09/17/1984 | 09/17/1984 | 09/17/1984 | 09/17/1984 | |
| South Carolina | 06/10/1975 | 09/26/1980 | 04/09/1982 | 09/03/1992 | |
| South Dakota | 12/30/1993 | 12/30/1993 | 12/30/1993 | 12/30/1993 | 10/22/2001 |
| Tennessee | 12/28/1977 | 09/30/1986 | 08/10/1983 | 04/18/1991 | |
| Texas6 | 09/14/1998 | 09/14/1998 | 09/14/1998 | 09/14/1998 | 09/14/1998 |
| Utah | 07/07/1987 | 07/07/1987 | 07/07/1987 | 07/07/1987 | 06/14/1996 |
| Vermont | 03/11/1974 | 03/16/1982 | 08/26/1993 | ||
| Virgin Islands | 06/30/1976 | 05/08/2014 | 12/26/2007 | ||
| Virginia | 03/31/1975 | 02/09/1982 | 04/14/1989 | 04/20/1991 | |
| Washington | 11/14/1973 | 09/30/1986 | 09/26/1989 | ||
| West Virginia | 05/10/1982 | 05/10/1982 | 05/10/1982 | 05/10/1982 | |
| Wisconsin | 02/04/1974 | 11/26/1979 | 12/24/1980 | 12/19/1986 | 07/28/20007 |
| Wyoming | 01/30/1975 | 05/18/1981 | 09/24/1991 |
1Authority for Idaho's municipal permits and pretreatment transferred 7/1/2018. Authority for individual industrial permits transferred 7/1/2019. Authority for individual stormwater permits transferred 7/1/2021.
2Authority for Idaho's stormwater general permits transferred 7/1/2020.
3Michigan’s biosolids program is authorized for land application. Michigan has not sought authorization for septage management, biosolids incineration, or biosolids surface disposal, and EPA retains jurisdiction over these practices in Michigan.
4Ohio’s biosolids program is authorized for land application, surface disposal, and disposal in a municipal solid waste landfill. Ohio has not sought authorization for biosolids incineration or land application of domestic septage, and EPA retains jurisdiction over these management practices in Ohio.
5Not authorized to issue permits for activities associated with the exploration, development, or production of oil or gas or geothermal resources, including transportation of crude oil or natural gas by pipeline. EPA is the permitting authority for those activities since they are not within the jurisdictions of the approved state agencies in Oklahoma.
6Authorized 1/15/2021 to issue permits for activities associated with exploration, development, or production of oil or gas or geothermal resources, including transportation of crude oil or natural gas by pipeline in Texas.
7Wisconsin’s biosolids program is authorized for land application, surface disposal, and disposal in a municipal solid waste landfill. Wisconsin has not sought authorization for biosolids incineration or land application of domestic septage, and EPA retains jurisdiction over these management practices in Wisconsin.