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Water: State, Tribal & Territorial Standards

Indian Tribal Approvals

The following chart lists EPA approvals for tribes to administer a water quality standards (WQS) program, and EPA’s approvals of those tribes’ WQS. A tribe may administer a WQS program if it applies and EPA finds that it qualifies under Section 518(e) of the Clean Water Act to be treated in a manner similar to a state (“TAS”). Currently, 48 tribes have been found eligible to administer a WQS program, and EPA has approved at least initial WQS for 39 of these tribes. EPA has promulgated federal WQS for 1 tribe not included in these totals.

Indian Tribal Approvals for the Water Quality Standards Program
Tribe EPA Region Date Found Eligible to Administer a WQS Program Date Initial WQS Approved by EPA
Pueblo of Isleta (NM) 6 13 Oct 1992 24 Dec 1992
Pueblo of Sandia (NM) 6 24 Dec 1992 10 Aug 1993
Ohkay Owingeh (NM) (formerly the Pueblo of San Juan) 6 12 May 1993 16 Sep 1993
Puyallup Tribe of Indians (WA) 10 25 May 1994 31 Oct 1994
Seminole Tribe (FL) 4 01 Jun 1994 26 Sep 1997 (Big Cypress Reservation)
18 Nov 1998 (Brighton Reservation)
Miccosukee Tribe (FL) 4 20 Dec 1994 25 May 1999
15 Mar 2001 (Miccosukee Reserve Area)
Confederated Salish and Kootenai Tribes of the Flathead Reservation (MT) 8 01 Mar 1995 18 Mar 1996
Confederated Tribes of the Chehalis Reservation (WA) 10 07 Mar 1995 03 Feb 1997
Pueblo of Santa Clara (NM) 6 19 Jul 1995 19 Jul 1995
Pueblo of Picuris (NM) 6 07 Aug 1995 07 Aug 1995
Pueblo of Nambe (NM) 6 18 Aug 1995 18 Aug 1995
Mole Lake Band of the Lake Superior Tribe of Chippewa Indians, Sokaogon Chippewa Community (WI) 5 29 Sep 1995 22 Jan 1996
Pueblo of Pojoaque (NM) 6 21 Mar 1996 21 Mar 1996
Tulalip Tribes (WA) 10 09 May 1996  
Fond du Lac Band of Chippewa (MN) 5 16 May 1996 27 Dec 2001
Hoopa Valley Tribe 9 17 May 1996 11 Sep 2002
Grand Portage Band of Chippewa (MN) 5 16 Jul 1996 02 Nov 2005
Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation (MT) 8 29 Aug 1996 25 Apr 2000
White Mountain Apache Tribe (AZ) 9 03 Feb 1997 27 Sep 2001
Pueblo of Tesuque (NM) 6 29 Apr 1997 29 Apr 1997
Confederated Tribes of the Warm Springs Reservation (OR) 10 25 May 1999 28 Sep 2001
Pueblo of Acoma (NM) 6 17 Apr 2001 17 Apr 2001
Confederated Tribes of Umatilla (OR) 10 30 Apr 2001 18 Oct 2001
Spokane Tribe of Indians (WA) 10 23 Jul 2002 22 Apr 2003
St. Regis Mohawk Tribe (NY) 2 16 Oct 2002 14 Sep 2007
Kalispel Indian Community (WA) 10 04 Nov 2002 24 Jun 2004
Port Gamble S’Klallam (WA) 10 24 Sept 2003 27 Sept 2005
Makah Indian Nation (WA) 10 23 Dec 2003 29 Sept 2006
Hualapai Indian Tribe (AZ) 9 22 Jul 2004 17 Sept 2004
Pawnee Nation (OK) 6 04 Nov 2004  
Coeur D’Alene Tribe (ID) 10 05 Aug 2005  
Ute Mountain Ute (CO) 8 26 Sept 2005 19 Oct 2011
Big Pine Band of Owens Valley (CA) 9 24 Oct 2005 18 Jan 2006
Pueblo of  Taos (NM) 6 08 Dec 2005 19 Jun 2006
Navajo Nation (AZ, NM, UT) 9 20 Jan 2006 11 Apr 2006
Paiute-Shoshone Indians of the Bishop Community (CA) 9 11 Apr 2006 15 Aug 2008
Northern Cheyenne (MT) 8 11 Aug 2006 21 Mar 2013
Twenty-Nine Palms (CA) 9 26 Oct 2006  
Pyramid Lake Paiute (NV) 9 30 Jan 2007  19 Dec 2008
Lummi Tribe (WA) 10 05 Mar 2007 30 Sep 2008
Lac du Flambeau Band of Chippewa (WI) 5 08 Apr 2008 17 Sep 2010
Swinomish Indian Tribal Community (WA) 10 18 Apr 2008  
Hopi Tribe (AZ) 9 23 Apr 2008 08 Jul 2008
Shoshone-Bannock Tribes (ID) 10 5 Sep 2008
Bad River Band of Lake Superior Chippewa (WI) 5 26 Jun 2009 21 Sep 2011
Havasupai Tribe (AZ) 9 26 Apr 2011
Dry Creek Rancheria Band of Pomo Indians (CA) 9 17 Oct 2011
Blackfeet Tribe (MT) 8 2 May 2012
Confederated Tribes of the Colville Reservation (WA) 10 Not applicable Promulgated
6 Jul 1989



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