Two Outstanding Treatment Plants in Mason County

Two treatment plants in Mason County are among the 111 wastewater treatment plants in Washington State to win outstanding performance awards.

The Washington State Department of Ecology honors the state’s top-performing wastewater treatment facilities with annual Wastewater Treatment Plant Outstanding Performance Award. Among those to achieved full compliance with their water quality permits in 2017 were the Alderbrook Resort & Spa Wastewater Treatment Plant and the City of Shelton Wastewater Treatment Plant.

In picking the winners, Ecology evaluated all the plants operating in Washington to determine how they were meeting the state pollution limits, monitoring and reporting requirements, spill prevention planning, pretreatment, and operational demands outlined in their permits.