NPDES Permit for Ahsahka Wastewater Treatment Plant on the Nez Perce Reservation

EPA is proposing to reissue this permit

We are accepting public comments on the draft permit from September 14 through October 14, 2026. Copies of the draft permit and supporting documents are available on this page below.

Below is EPA's National Pollutant Discharge Elimination System (NPDES) permit for the Ahsahka Wastewater Treatment Plant on the Nez Perce Reservation in Idaho.

Permit number: ID0025224

Current permit

Effective date: March 1, 2021
Permit expires: February 28, 2026 (expired)

NPDES Permit, Ahsahka Water and Sewer District, #ID0025224 (pdf) (461.3 KB, January 20, 2021)
Final wastewater permit.
NPDES Permit Fact Sheet, Ahsahka Water and Sewer District, #ID0025224 (pdf) (921.38 KB, October 2020)
Technical basis for October 2020 draft permit.

Proposed permit

EPA is proposing to reissue this permit to the Ahsahka Wastewater Treatment Plant. We are accepting public comments on the draft permit from September 14 through October 14, 2026. Copies of the draft permit and supporting documents are available below.

Draft NPDES Permit, Ahsahka Wastewater Treatment Plant, #ID0025224 (pdf) (500.18 KB, September 2026)
NPDES Permit Fact Sheet, Ahsahka Wastewater Treatment Plant, #ID0025224 (pdf) (1.25 MB, September 2026)