NPDES Permit for Toppenish Wastewater Treatment Plant on the Yakama Reservation

Below is EPA's National Pollutant Discharge Elimination System (NPDES) permit for the City of Toppenish Wastewater Treatment Plant within the Yakama Indian Reservation in Washington.

Permit number: WA0026123

Current permit

Effective date: July 1, 2013
Permit expires: June 30, 2018 (administratively continued)

• NPDES Permit, City of Toppenish, #WA0026123 (pdf) (182.11 KB, May 23, 2013)
  Final wastewater discharge permit.
• NPDES Permit Fact Sheet, City of Toppenish, #WA0026123 (pdf) (537.48 KB, September 2012)
  Technical basis for September 2012 draft permit.
• Response to Comments on Draft Permit for City of Toppenish, #WA0026123 (pdf) (486.92 KB, May 2013)
  EPA's responses to comments received during the public comment period for the September 2012 draft permit.

Proposed permit

EPA is proposing to reissue this permit. We are accepting comments on the draft permit from September 9 through October 9, 2025. Copies of the draft permit and supporting documents are available below.

• Draft NPDES Permit, City of Toppenish WWTP, #WA0026123 (pdf) (1.04 MB, September 2025)
  Proposed wastewater permit.
• NPDES Permit Fact Sheet, City of Toppenish WWTP, #WA0026123 (pdf) (2.61 MB, September 2025)
  Technical basis for draft permit.