NPDES permit for Kamiah Water Treatment Plant in Idaho

EPA is proposing to reissue this permit

We are accepting public comments on the draft permit from January 6 through February 5, 2026. Copies are also available below.

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

Permit number: ID0028461

Current permit

Effective date: January 1, 2013
Permit expires: December 31, 2017 (administratively continued)

NPDES Permit, Kamiah Water Treatment Plant, Idaho, #ID0028461 (pdf) (189.64 KB, November 2012)
Final discharge permit.
NPDES Permit Fact Sheet, Kamiah Water Treatment Plant, Idaho, #ID0028461 (pdf) (476.76 KB, October 2012)
Technical basis for October 2012 draft permit.
Response to Comments on Draft Permit for Kamiah Water Treatment Plant, Idaho, #ID0028461 (pdf) (12.09 KB, November 2012)
EPA's responses to comments received during the public comment period for the October 2012 draft permit.

Proposed permit

EPA is proposing to reissue this permit. We are accepting public comments on the draft permit from January 6 through February 5, 2026. Copies of the draft permit and supporting documents are available below.

Draft NPDES Permit, Kamiah Water Treatment Plant, Idaho, #ID0028461 (pdf) (421.44 KB, January 2026)
EPA's proposed permit.
NPDES Permit Fact Sheet, Kamiah Water Treatment Plant, Idaho, #ID0028461 (pdf) (1.19 MB, January 2026)
Technical basis for draft permit.