Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

NPDES Permit for Wapato Wastewater Treatment Plant in Washington

Below are EPA's National Pollutant Discharge Elimination System (NPDES) permit and supporting documents for the City of Wapato Wastewater Treatment Plant on the Yakama Reservation in Washington.

Permit number: WA0050229
Effective date: October 1, 2023
Permit expires: September 30, 2028

NPDES Permit, City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (437.45 KB, September 20, 2023)
Final wastewater permit including minor modification.
Revised NPDES Permit Fact Sheet, City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (5.86 MB, April 2023)
Technical basis for revisions to draft permit.
NPDES Permit Fact Sheet, City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (6.81 MB, June 2022)
Technical basis for 2022 draft permit.
Response to Comments on Draft NPDES Permit for City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (364.35 KB, July 2023)
EPA's responses to public comments on the June 2022 and April 2023 draft permits.