Read the 2020 GSI Program Accomplishments Summary
Why 700 Million Gallons?
In Seattle, we’ve set a goal to manage 700 million gallons of polluted runoff per year with green stormwater infrastructure (GSI) by 2025. We’re doing this because GSI provides benefits to our communities. Explore this website to learn more about GSI’s benefits and how you can help reach this goal.
GSI Around You
Hundreds of GSI projects have been built in Seattle over the past two decades. Click on this map to see each project organized by type, goal, and who built it.
Go to GSI Map
Explore the GSI projects around Seattle
See projects by type or goal
Click on individual projects to see more information