How we clean and recycle wastewater

Cleaning your wastewater

Clean Water Services cleans 60 million gallons of wastewater daily for nearly 551,000 customers in urban Washington County. The wastewater is collected by a vast network of more than 800 miles of sewer lines and 41 pump stations and routed to one of four treatment plants—Durham, Rock Creek, Hillsboro and Forest Grove.

We use physical, biological, and chemical treatment to clean wastewater to some of the highest standards in the nation. The cleaned wastewater is then released into the Tualatin River.

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Surface & Stormwater Management

The District’s Stormwater Management (SWM) program improves water quality, protects fish habitat and manages drainage by operating and maintaining the stormwater conveyance system, establishing design and construction standards, regulating activities that can impact the watershed and enhancing streams and floodplains. Clean Water Services is the regional SWM utility for urban Washington County. In cooperation with Washington County and the 12 Cities in our district, we build, maintain and enhance the public drainage system to meet public needs and to comply with strict water quality regulations set for the Tualatin River drainage area by the Oregon Department of Environmental Quality (DEQ).

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