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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
What can I do? Learn more below.

How can I help?

Preventing water pollution takes effort but can be cheap and effective. Conserving water stretches a valuable resource. You are responsible for clean water.

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

Find out how you can help keep water clean!
Keep water clean

Don't let this happen to your side sewer
Maintain your side sewer

Grease in sewer
Prevent grease from blocking sewers

This is Flushing Awesome
This is Flushing Awesome: don't flush trouble - what not to flush in the toilet

Learn more about how to get rid of stuff you don't need or want.