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King County produces high-quality recycled water at the South Treatment Plant, Brightwater Treatment Plant and Carnation Treatment Plant. Additionally, we recycle water for many internal process water uses at the West Point Treatment Plant. Using recycled water for non-potable water uses at our facilities saves money and water resources.

In 1998, King County and the City of Tukwila pioneered the use of recycled water for irrigation in this region produced at the South Treatment Plant in Renton. Since then, South Treatment Plant recycled water serves water for irrigating athletic fields, nurseries and street sweeping.

In 2013, the King County Reclaimed Water Program began distributing recycled water from the Brightwater Treatment Plant to our first major Eastside customer, Willows Run Golf Complex. Brightwater Recycled Water is a new water source that can support a variety of non-potable uses in the Sammamish Valley to support local farms, businesses, and recreational facilities.

We are also exploring ways Brightwater Recycled Water can enhance stream flow to improve habitat for fish and wildlife as we have successfully done with recycled water from our Carnation Treatment Plant. Our Carnation Treatment plant sends highly treated recycled water to enhance wetlands in the Chinook Bend Natural Area, creating rich wildlife habitat and protecting water quality.


For more information about the recycled water program, please contact us at:

Interested in reclaimed water, but  concerned about protecting your water rights?

Do you have questions on how to protect your water rights as a user of reclaimed water?

Visit the following websites for information and guidance:

Washington Water Trust

Washington State Department of Ecology Water Resources Program