Chambers Creek Regional Wastewater Treatment Plant

We invite you to comment on the proposed modification to the National Pollutant Discharge Elimination System (NPDES) permit No. WA0039624. The proposed draft permit modification includes new conditions necessary to regulate the discharge of nutrients from the Chambers Creek Regional Wastewater Treatment Plant which discharges treated wastewater into the Gordon area of the Puget Sound. 

You may view the draft modification, fact sheet addendum, and other permit documents at Chambers Creek Regional Wastewater Treatment Plant Permit Documents or visit the Water Quality Permitting and Reporting Information System (PARIS) webpage.

To comment or request a public hearing, use one of the ways listed below. 

We will schedule a public hearing on the proposed permit changes if we determine that there is significant public interest. To request a public hearing, please contact swrowqpermits@ecy.wa.gov by Oct. 19, 2026, and include the permit number and your reason for requesting the hearing. 

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 Puget Sound. All wastewater must be treated and meet the applicable water quality standards before it goes into surface water to protect human health and aquatic life. Learn more about water quality individual permits.

We have modified this permit to incorporate conditions necessary to regulate the discharge of nutrients. The modification adds monitoring and planning conditions similar to what were in the now-terminated Puget Sound Nutrient General Permit. It also includes a technology based effluent limit for total inorganic nitrogen.