Community tours

Our community tours are a chance to explore the world of GSI and discover innovative water projects that are hiding in plain sight. Use our tour maps to visit projects that do double duty, providing drainage management and beautiful community spaces and parks.

Seattle is a national leader in building green stormwater infrastructure (GSI), a specific type of stormwater management system. GSI uses above ground drainage systems – including soil, trees, plants, pavers, natural landforms, even vegetated roofs – which convey, slow, and store stormwater, and filter out pollutants from our runoff.