EPA Approvals of Tribal Water Quality Standards

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, 54 tribes have been found eligible to administer a WQS program, and EPA has approved WQS for 42 of these tribes. EPA has promulgated federal WQS for 1 tribe (Colville Reservation) listed in the chart but not included in the above totals.

EPA Approvals of Tribal Water Quality Standards
Tribe	EPA Region	EPA Contact	Date Found Eligible to Administer a WQS Program (TAS) [yyyy-mm-dd]	Date Initial WQS Approved by EPA [yyyy-mm-dd]
Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation (MT)	8	George Parrish	1996-08-29	2000-04-25
Bad River Band of Lake Superior Chippewa (WI)	5	Kathleen Mayo, David Pfeifer	2009-06-26	2011-09-21
Big Pine Band of Owens Valley (CA)	9	Terry Fleming	2005-10-24	2006-01-18
Blackfeet Tribe (MT)	8	George Parrish	2012-05-02
Citizen Potawatomi Nation (OK)	6	Diane Evans	Pending Review
Coeur D’Alene Tribe (ID)	10	Maja Tritt	2005-08-05	2014-06-12
Confederated Salish and Kootenai Tribes of the Flathead Reservation (MT)	8	George Parrish	1995-03-01	1996-03-18
Confederated Tribes of the Chehalis Reservation (WA)	10	Maja Tritt	1995-03-07	1997-02-03
Confederated Tribes of the Colville Reservation (WA)	10	Maja Tritt	Not applicable	1989-07-06 (promulgation)
Confederated Tribes of the Warm Springs Reservation (OR)	10	Maja Tritt	1999-05-25	2001-09-28
Confederated Tribes of Umatilla (OR)	10	Maja Tritt	2001-04-30	2001-10-18
Cortina Band of Wintun Indians (CA)	9	Terry Fleming	2016-04-07
Dry Creek Rancheria Band of Pomo Indians (CA)	9	Terry Fleming	2011-10-17
Eastern Band of Cherokee Indians (NC)	4	Eve Zimmerman	2015-01-26
Fond du Lac Band of Chippewa (MN)	5	Kathleen Mayo, David Pfeifer	1996-05-16	2001-12-27
Grand Portage Band of Chippewa (MN)	5	Kathleen Mayo, David Pfeifer	1996-07-16	2005-11-02
Havasupai Tribe (AZ)	9	Terry Fleming	2011-04-26
Hoopa Valley Tribe	9	Terry Fleming	1996-05-17	2002-09-11
Hopi Tribe (AZ)	9	Terry Fleming	2008-04-23	2008-07-08
Hualapai Indian Tribe (AZ)	9	Terry Fleming	2004-07-22	2004-09-17
Kalispel Indian Community (WA)	10	Maja Tritt	2002-11-04	2004-06-24
Lac du Flambeau Band of Chippewa (WI)	5	Kathleen Mayo, David Pfeifer	2008-04-08	2010-09-17
Lummi Tribe (WA)	10	Maja Tritt	2007-03-05	2008-09-30
Makah Indian Nation (WA)	10	Maja Tritt	2003-12-23	2006-09-29
Miccosukee Tribe (FL)	4	Eve Zimmerman	1994-12-20	1999-05-25 2001-03-15 (Miccosukee Reserve Area)
Mole Lake Band of the Lake Superior Tribe of Chippewa Indians, Sokaogon Chippewa Community (WI)	5	Kathleen Mayo, David Pfeifer	1995-09-29	1996-01-22
Navajo Nation (AZ, NM, UT)	9	Terry Fleming	2006-01-20	2006-04-11
Northern Cheyenne (MT)	8	George Parrish	2006-08-11	2013-03-21
Ohkay Owingeh (NM) (formerly the Pueblo of San Juan)	6	Diane Evans	1993-05-12	1993-09-16
Paiute-Shoshone Indians of the Bishop Community (CA)	9	Terry Fleming	2006-04-11	2008-08-15
Pala Band of Mission Indians (CA)	9	Terry Fleming	2016-04-19
Pawnee Nation (OK)	6	Diane Evans	2004-11-04
Port Gamble S’Klallam (WA)	10	Maja Tritt	2003-09-24	2005-09-27
Pueblo of Acoma (NM)	6	Diane Evans	2001-04-17	2001-04-17
Pueblo of Isleta (NM)	6	Diane Evans	1992-10-13	1992-12-24
Pueblo of Laguna (NM)	6	Diane Evans	2016-12-20
Pueblo of Nambe (NM)	6	Diane Evans	1995-08-18	1995-08-18
Pueblo of Picuris (NM)	6	Diane Evans	1995-08-07	1995-08-07
Pueblo of Pojoaque (NM)	6	Diane Evans	1996-03-21	1996-03-21
Pueblo of Sandia (NM)	6	Diane Evans	1992-12-24	1993-08-10
Pueblo of Santa Ana (NM)	6	Diane Evans	2015-07-20	2015-08-31
Pueblo of Santa Clara (NM)	6	Diane Evans	1995-07-19	1995-07-19
Pueblo of Taos (NM)	6	Diane Evans	2005-12-08	2006-06-19
Pueblo of Tesuque (NM)	6	Diane Evans	1997-04-29	1997-04-29
Puyallup Tribe of Indians (WA)	10	Maja Tritt	1994-05-25	1994-10-31
Pyramid Lake Paiute (NV)	9	Terry Fleming	2007-01-30	2008-12-19
Saint Regis Mohawk Tribe (NY)	2	Wayne Jackson	2002-10-16	2007-09-14
Seminole Tribe (FL)	4	Eve Zimmerman	1994-06-01	1997-09-26 (Big Cypress Reservation) 1998-11-18 (Brighton Reservation)
Shoshone-Bannock Tribes (ID)	10	Maja Tritt	2008-09-05
Spokane Tribe of Indians (WA)	10	Maja Tritt	2002-07-23	2003-04-22
Southern Ute Indian Tribe (CO)	8	George Parrish	Pending Review
Swinomish Indian Tribal Community (WA)	10	Maja Tritt	2008-04-18
Tulalip Tribes (WA)	10	Maja Tritt	1996-05-09
Twenty-Nine Palms (CA)	9	Terry Fleming	2006-10-26	2015-08-20
Ute Mountain Ute (CO)	8	George Parrish	2005-09-26	2011-10-19
Walker River Paiute Tribe (NV)	9	Terry Fleming	2016-02-29
White Mountain Apache Tribe (AZ)	9	Terry Fleming	1997-02-03	2001-09-27

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