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Navajo Nation Environmental Protection Agency | Public Water Systems Supervision Program
The Public Water Systems Supervision Program is under the Surface and Groundwater Protection Department of the Navajo Nation Environmental
Protection Agency  The NNEPA is an independent entity of the Executive Branch of the Navajo Nation. SGWD is responsible for protecting the waters
of the Navajo Nation.
Last Updated:  Tuesday, September 14, 2017
Mailing Address: PO Box 339, Window Rock, AZ 86515
Shipping Address: HWY 264, Navajo Nation Fairgrounds, Old Museum Bldg #W008-042, Window
Rock, AZ 86515
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PWSSP is Now a Primacy Program

The Navajo Nation Environmental Protection Agency's Public Water Systems
Supervision Program is now being represented as a Primacy Program, based on
U.S. EPA-Region 9's approval of  the Primary Enforcement Authority over most of the
water systems on the Navajo Nation.
Email: Webmaster