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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

Reduce energy and water needs


Use a garbage disposal sparingly to minimize energy and water use. 

Garbage disposals connect to the sewer system and food waste will eventually get recycled through the wastewater treatment plants as biosolids soil amendment.

However, running a garbage disposal requires water and electricity, after the food goes down the drain even more water and electricity will be used to move the water and clean the food out and truck it to farms and forests.

Helpful hint: When trying to recycle food waste, choose an option that is the most efficient, local, and uses the least energy:

1) Compost at home
2) Put food scraps in your green yard waste bins
3) Use the garbage disposal

Did you know? Food in the trash never gets recycled and creates more greenhouse gases at the landfill.

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

Turn off faucets. Collect excess water in a bucket.
Turn off faucets

Fix leaks; monitor meters for water use.
Fix leaks