Traditional pipes and treatment plants clean up polluted runoff only after it’s traveled for miles. GSI takes a different approach: plants, trees, soil, and engineering inspired by natural drainage systems manage stormwater right where it falls.
By mimicking nature, GSI does more than protect our waterways. It adds trees and plants to our neighborhoods, gives pollinators a place to live, improves air quality, and helps replenish groundwater.
Seattle has long worked to expand GSI’s reach and effectiveness through technical innovation. Read the history of GSI in Seattle and what’s next for innovative solutions.
Select each solution to learn more about the different types of GSI.
