Carnation Treatment Plant
Wastewater Treatment Division (WTD) and Novel Coronavirus (COVID-19)
WTD operations staff remain on the job 24/7 to ensure the region’s wastewater treatment service continues. Following the guidance of Seattle-King County Public Health, our offices are closed to the public and all facility tours are suspended until further notice. Please check back periodically for updates.
For questions about COVID-19, we encourage people to visit the Public Health – Seattle & King County website: www.kingcounty.gov/covid and subscribe to the Public Health Insider blog: www.publichealthinsider.com
The Carnation Treatment Plant, located in the City of Carnation, serves about 2,000 people in Carnation’s urban growth area, with capacity to serve up to 4,000 in 2030.
The plant is part of King County's regional system. At design capacity, the plant is expected to treat 480,000 gallons of wastewater a day. The collection system, owned and maintained by the City of Carnation , delivers sewage to the plant from residential and commercial customers.
In addition to the reclaimed water, the plant has been designed with numerous “green” features that minimize impacts on the environment, conserve resources and maximize energy efficiency.
Carnation Treatment Plant aerial view
View more photos on our Flickr site .
24 hour emergency and odor reporting: 206-263-1760
4405 Larson Ave.
Carnation, WA 98041
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