Navajo Nation NPDES Permits

EPA’s Pacific Southwest (Region 9) issues all NPDES permits on Navajo Nation tribal lands.

The table(s) below contain all final (i.e. active) and draft (i.e. proposed) NPDES permits issued by EPA’s Pacific Southwest (Region 9) within Navajo Nation lands. It includes permits for individual facilities, general permits, and stormwater permits. Click on the facility/permit name to view the permit and supporting documents.

For State-Issued Permits: Arizona Pollutant Discharge Elimination System
See Also: Arizona Tribal Lands NPDES Permits

Draft Permits

Draft NPDES Permits Pending on Navajo Nation Tribal Lands
Facility/Discharger	Location	Permit Number	Permit Status
General Permit for Low Threat Discharge on Navajo Nation	Navajo Nation	NNG990001	Public Comment ends June 26, 2023.
Shiprock Wastewater Treatment Facility Navajo Tribal Utility Authority (NTUA)	Shiprock, NM	NN0020621	Public Comment ends May 17, 2023.
Black Mesa Complex Peabody Western Coal Company	Kayenta, AZ	NN0022179	Public Comment ends December 28, 2020.

Final Permits

Final NPDES Permits Issued by EPA on Navajo Nation Tribal Lands
Facility / Discharger	Location	Permit Number	Permit Status	Effective Date	Expiration Date
APS Four Corners Power Plant Arizona Public Service Company	San Juan County, NM	NN0000019	Final	2020/12/01	2025/11/30
English Lease Boundary Butte Capitol Operating Group, LLC	San Juan County, UT	NN0020133	Final	2022/07/01	2027/06/30
Chinle WWTF Navajo Tribal Utility Authority (NTUA)	Chinle, AZ	NN0020265	Final	2018/09/01	2023/08/31
Kayenta WWTF Navajo Tribal Utility Authority (NTUA)	Kayenta, AZ	NN0020281	Final	2018/08/01	2023/07/31
Tuba City WWTF Navajo Tribal Utility Authority (NTUA)	Tuba City, AZ	NN0020290	Final	2022/05/01	2027/04/30
Shiprock WWTF Navajo Tribal Utility Authority (NTUA)	Shiprock, NM	NN0020621	Final	2018/03/01	2023/02/28
Nenahnezad Community School U.S. Bureau of Indian Affairs	Fruitland, NM	NN0020800	Final	2019/11/01	2024/10/31
Wingate High School U.S. Bureau of Indian Affairs	Fort Wingate, NM	NN0020958	Final	2022/04/01	2027/03/31
Window Rock WWTF Navajo Tribal Utility Authority (NTUA)	Fort Defiance, AZ	NN0021555	Final	2021/10/01	2026/09/30
Cameron Trading WWTF Cameron Trading Post	Cameron, AZ	NN0021610	Final	2022/11/01	2027/10/31
Black Mesa Complex Peabody Western Coal Company	Kayenta, AZ	NN0022179	Final	2010/11/01	2015/10/31
Ganado WWTF Navajo Tribal Utility Authority (NTUA)	Apache County, AZ	NN0022195	Final	2021/08/01	2026/07/31
Gouldings Lodge RGJ, Inc.	Monument Valley, UT	NN0025178	Final	2021/05/01	2026/04/30
Navajo Coal Mine Navajo Transitional Energy Company / Bisti Fuels Company, LLC – Navajo Mine	San Juan County, NM	NN0028193	Final	2018/05/01	2023/04/30
McKinley Mine Chevron Mining, Inc.	Gallup, NM	NN0029386	Final	2017/07/01	2022/06/30
Pine Hill WWTF Ramah Navajo School Board, Inc.	Pine Hill, NM	NN0030325	Final	2021/08/01	2026/07/31
Northern Edge Navajo Casino Navajo Tribal Utility Authority	Upper Fruitland, NM	NN0030343	Final	2022/12/01	2027/11/30
Twin Arrows Navajo Casino and Resort WWTF Navajo Tribal Utility Authority (NTUA)	Fort Defiance, AZ	NN0030344	Final	2018/05/01	2023/04/30
Navajo Nation Municipal Pipeline Project Navajo Engineering and Construction Authority (NECA)	Shiprock, NM	NN0030345	Final	2019/09/01	2024/08/31
General Permit for Low Threat Discharge on Navajo Nation	Navajo Nation	NNG990001	Final	2018/05/01	2023/04/30

Public Notice

Proposed Reissuance of NPDES General Permit for Low Threat Discharge in Navajo Nation (NNG990001)

Proposed NPDES General Permit for Low Threat Discharge in Navajo Nation (LTGP), a reissuance of the LTGP which was first issued in 2018 and expires on April 30, 2023.
- Comments Due Date: June 26, 2023
- Geographic Locations: Southwest

(Public Notices will appear here when available)

Contact

Gary Sheth (sheth.gary@epa.gov)
(415) 972-3516