Lewis County No. 6 Wastewater Treatment Plant Draft Permit

The draft permit we proposed to reissue to Lewis County No. 6 Wastewater Treatment Plant which authorizes the discharge of treated domestic wastewater into the Cowlitz River at River Mile 52 near Lake Mayfield Powerhouse.

You can view the documents at Lewis County No. 6 Wastewater Treatment Plant Permit Documents or visit the Water Quality Permitting and Reporting Information System (PARIS) website.

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.