South Park Water Quality Facility

What & Why

Seattle Public Utilities is currently working on three stormwater projects in northwest South Park’s lower industrial basin to reduce flooding and improve water quality in the Lower Duwamish Waterway.

This project will build a water quality facility to treat stormwater from the drainage system before it flows into the Duwamish Waterway.

Before we can operate the new water quality facility, we must construct a pump station that will ultimately send flows to the water quality facility.

What's happening now?

SPU is evaluating stormwater treatment technologies for the facility. Field testing of treatment technologies was completed in 2017. Next steps for the project include:

  • Technology and site selection will continue through 2018.
  • The design and construction schedule will be finalized once a technology and site are selected.

Project goals and benefits

When complete, this project will clean stormwater before it flows into the Duwamish Waterway. Combined with the pump station, this project will allow the system to accommodate the expansion of the drainage improvements being planned in South Park.

This project is part of the Plan to Protect Seattle Waterways.