Washington State Department of Ecology


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Wastewater Treatment Plants (WWTPs) (3 publications 2025-2026)


7
Title (link to summary)NumberDate (released or updated)
State Waste Discharge Permit Application - POTW to Ground ECY 040-178March 2026
State Permit Application for the Generation, Distribution and Use of Reclaimed Water ECY 070-180January 2026
Application for Domestic Wastewater Treatment Plant Operator Certification ECY 040-2-131June 2025

 

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