King County Stormwater

Take action to save Puget Sound.

Storm drain stencilStormwater, or polluted runoff, is the leading contributor to reduced water quality in Puget Sound.

Learn more about polluted runoff, its impacts on the environment, how King County is addressing the issue, and how you can help. Start by watching these short videos.

Stormwater mattersWhat is stormwater and why is it important?

Stormwater regulationsStormwater regulations - local and national

King County's Stormwater Management Plan - Ten steps to successKing County's Stormwater Management Plan - Ten steps to success

How you can improve stormwater to help Puget SoundHow you can improve stormwater to help Puget Sound

View more in the Stormwater Video Library.

Test your knowledge: take the stormwater quiz.

Participate by taking our online stormwater survey, or sending us a comment at, or through the U.S. mail to the Stormwater Management Team, King County Department of Natural Resources and Parks, 201 S. Jackson St., Suite 600, Seattle, WA 98104.

Public comment on the program will be accepted through March 10.

Take action:

In your yardIn Your Yard: Use fertilizers and pesticides sparingly, or just use compost.

With your carWith Your Car: Take your car to a commercial car wash and have the oil leaks fixed.

Around your dogAround Your Dog: Pick up dog poop, bag it and place it in the trash (not in the yard waste bin).

At homeAt Home and More: From cleaning products to septic maintenance, be aware of how you care for your home.

To learn more about what you can do, visit the Puget Sound Starts Here website.

As part of an ongoing commitment to protect public health and improve environmental conditions in our streams, rivers, lakes and Puget Sound, King County annually reviews and updates its overall stormwater management plan.

  • A detailed description of the plan can be found online.

For more information about stormwater, please visit: 

Presentations on the Stormwater Management Program to interest groups are available by request. Please email us at