Public Water Systems Supervision Program

The Public Water Systems Supervision Program (PWSSP) protects and regulates drinking water on the Navajo Nation. It ensures that the water that comes out of your tap is clean and safe to drink, by reviewing designs for public water systems (PWSs); regulating their construction and operation; and inspecting them for compliance with the Navajo Nation Safe Drinking Water Act (NNSDWA) and with the PWSSP regulations.

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

The PWSSP regulations set primary (health-based) and secondary (aesthetic) standards. In addition, the regulations prescribe water sampling requirements, water treatment techniques, operator certification requirements, and requirements for water system design and construction. All of these requirements are contained in the Navajo Nation Primary Drinking Water Regulations (NNPDWR).

 The U.S. Environmental Protection Program (USEPA) has approved the Navajo Nation’s PWSSP as meeting all the requirements to implement and enforce the federal Safe Drinking Water Act and federal regulatory requirements for PWSs. That approval means that the PWSSP has primary enforcement authority, or “primacy,” over all PWSs on the Navajo Nation, including on tribal trust lands outside the formal reservation boundaries.

The PWSSP also implements the Source Water Assessment Program (SWAP) and develops Source Water Protection Plans under that program.

  • Cross-Connection Control Program

    The PWSSP requires PWS owners and operators to protect water supplies from contamination by implementing a cross-connection control program.

  • Source Water Assessment Program (SWAP)

    Click here for a description of the Source Water Assessment Program.

  • Design/Review Construction Permits

    The NNPDWR contain minimum design requirements, requirements for construction permits, and requirements for operating permits. All proposed new PWSs and proposed extensions/modifications to existing PWSs must undergo a design review and obtain a construction permit before starting construction.

  • Public Water Systems on the Navajo Nation

    Click here for more information about types of public water systems, and to access the most recent Public Water System Compliance Report.

  • Information on Drinking Water

    Click here to learn more about our drinking water and where it comes from.

  • Public Water Operator Certification & Training

    Click here to learn about how to become certified as a Public Water Operator on the Navajo Nation.