Ridgefield Wastewater Treatment Plant Draft Permit

The draft permit we proposed to reissue to Ridgefield Wastewater Treatment Plant and the contributing jurisdiction of Clark Regional Wastewater District authorizes the discharge of treated domestic wastewater into Lake River, a tributary of the Columbia River. 

You can view the documents at Ridgefield Wastewater Treatment Plant Permit Documentsor visit the Water Quality Permitting and Reporting Information System (PARIS) website.

Please send your comments in by July 14, 2025 at 11:59 p.m.

Background

We regulate wastewater released from municipalities and industries using the National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit. This permit regulates wastewater that goes directly into lakes, rivers, Puget Sound, or the ocean (surface water). All wastewater must be treated before it goes into surface water to protect human health and aquatic life. Learn more about water quality individual permits.