What is Stormwater & Why is it Important?
Stormwater is rain or snow melt that runs off streets, rooftops, and parking lots. This runoff picks up chemicals, pet waste, and other pollution as it travels. It then enters our stormwater systems where it is moved, is temporarily held, is sometimes filtered, and drains to our local waters.
Thurston County, Olympia, Lacey, and Tumwater follow state and federal protections to manage stormwater, as described in our Municipal Stormwater Permit. Our programs are designed to educate the community to take specific actions that reduce pollution, prevent flooding, restore habitats, and protect our waters. Success depends on the collaboration of many stakeholders, including residents, businesses, volunteers, local tribes, non-profit organizations, and local governments.
Stormwater management is important and it affects everyone! The quality of our water, health of our streams, and flood-safety of our neighborhoods depend on how well we plan and maintain our stormwater system. That’s why we want your voice in the Stormwater Management Program Plan (SWMP Plan). Your input can help shape the programs that protect our natural environment. Public input usually happens once a year, but major projects like the 2024–2029 Permit can involve more outreach. This fall, we’re asking for your feedback on our draft 2026 SWMP Plans. We want to know your concerns and what matters most to you. Your ideas can help us build a healthier, more resilient future for all of Thurston County!
Learn more about our SWMP Plan in the Summer 2025 and Fall 2025 Stream Team newsletters.
How to Share Your Ideas
City of Lacey:
waterresources@cityoflacey.org
City of Olympia:
olympiawa.gov/swmp
City of Tumwater:
wrs@ci.tumwater.wa.us
Thurston County:
stormwaterutility@co.thurston.wa.us
The Stormwater Video Series
Ever wonder what happens behind the scenes to keep our streams and stormwater systems healthy? This fall, Stream Team is rolling out a stormwater video series made just for you. Each short video takes you along with the local crews and partners who make it all happen. Follow along as new episodes drop on our social media pages throughout the season—you’ll see how your community protects clean water and how your everyday choices make a difference!
PART ONE: WHAT IS STORMWATER?
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