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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Staff Contacts

Only 1 percent of water on earth is fresh and available

Install drip irrigation to directly water plant roots.


Water more efficiently  

Install drip irrigation to directly water plant roots in flower, vegetable, and herb beds. Using this type of system will water more efficiently and can be set on a timer for convenience.

Did you know? Watering in the early morning or late evening will avoid evaporation from mid-day sun and more water will go to the plants.

Do it yourself: For indoor or potted plants try cutting off the bottom of a plastic bottle, stick the bottle's base in the soil and fill the open end with water.

Find out how you can help save water!
Use less water


Collect rain water to irrigate during summer.
Collect water
to irrigate


Compost: healthy soil retains more water.
Using compost