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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

Compost: healthy soil retains more water.


Adding compost helps soils retain more water

Prevent the need to water more by choosing natural yard care products and compost with lots of organic material that helps the soil absorb and hold water.

It's best to pick a compost that comes from a recycled waste stream, such as composted yard waste or Groco biosolids. Using these products keeps them from going to a landfill.

Did you know? Each pound of waste that doesn't go into the landfill prevents 2.5 pounds of CO2 emissions.

Helpful hint: Keep a compost bin with a lid in your kitchen. Try keeping baking soda next to your kitchen compost bin, sprinkle a little on it to keep the odors at bay.

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

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

Install drip irrigation to directly water plant roots.
Install drip irrigation

Reduce energy and water needs; compost food waste
Minimize Garbage disposal use


External resources 

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