NPDES Permit for Riverside Water and Sewer District Water Treatment Plant in Idaho

EPA is proposing to reissue this permit

We are accepting comments on the draft permit from September 17 through October 17, 2025. Copies of the draft permit and supporting documents are also available on this page under "proposed permit."

Below is EPA's National Pollutant Discharge Elimination System (NPDES) permit for the Riverside Water and Sewer District Water Treatment Plant located on the Nez Perce Reservation in Orofino, Idaho.

Permit number: ID0021237

Current permit

Effective date: November 1, 2017
Permit expires: October 31, 2022 (administratively continued)

NPDES Final Permit, Riverside Water and Sewer District Water Treatment Plant, Idaho, #ID0021237 (pdf) (155.07 KB, August 30, 2017)
NPDES Permit Fact Sheet, Orofino and Riverside Water and Sewer District Water Treatment Plants, Idaho (pdf) (867.22 KB, May 2017)
Note: This fact sheet applies to both facilities referenced in the title.
Response to Comments, Orofino and Riverside Water and Sewer District Water Treatment Plants, Idaho (pdf) (52.83 KB, August 30, 2017)
Note: This response to comments applies to both facilities referenced in the title.

Proposed permit

EPA is proposing to reissue this permit. We are accepting comments on the draft permit from September 17 through October 17, 2025. Copies of the draft permit and supporting documents are available below.

Draft NPDES Permit, Riverside Water and Sewer District Water Treatment Plant, Nez Perce Reservation, #ID0021237 (pdf) (511.21 KB, September 2025)
Proposed discharge permit.
NPDES Permit Fact Sheet, Riverside Water and Sewer District Water Treatment Plant, Nez Perce Reservation, #ID0021237 (pdf) (956.89 KB, September 2025)
Technical basis for draft permit.