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

Current Permit

Effective date: November 11, 2011
Permit expires: October 31, 2016 (administratively continued)

• NPDES Permit, City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (235.69 KB, September 12, 2011)
  Final permit.
• NPDES Permit Fact Sheet, City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (1.14 MB, May 2011)
  Technical basis for 2011 permit.
• Response to Comments on Draft NPDES Permit for City of Wapato, WWTP, Yakama Reservation, #WA0050229 (pdf) (211.44 KB, August 2011)
  EPA's responses to public comments on the May 2011 draft permit.

Proposed Permit

EPA is proposing to reissue this permit. We accepted public comments on the original draft permit from June 27 to August 11, 2022. Based on new information since that time, EPA has added conditions to the draft permit.

We are accepting public comments on the revised draft permit from April 13 through May 15, 2023.

• Revised Draft NPDES Permit, City of Wapato WWTP, Yakama Reservation, #WA0050229 (pdf) (674.21 KB, April 2023)
  Proposed wastewater permit.
• 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.