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RainWise
Private property owners can be part of the stormwater pollution solution
With every storm, rain carries pollutants off our roofs, driveways and other hard surfaces. These pollutants end up in our creeks, the Duwamish River, our lakes, and Puget Sound. During big storms, the sheer volume of this “stormwater” can cause sewer overflows and polluted runoff.
RainWise helps private property owners install rain gardens and cisterns to help manage the rain that falls on their roofs. These installations can also add attractive landscaping, provide water for summer irrigation, and may reduce flooding.
Check out 700milliongallons.org to find out if you qualify for rebates, see examples of rain gardens and cisterns, and learn more about how to get RainWise.
How to become RainWise
RainWise rebates cover most or all of the cost of installing cisterns and rain gardens on private properties in eligible combined sewer overflow basins. The average rebate is approximately $4,740.
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Check your eligibility
Enter your address on the 700milliongallons eligibility webpage to see if your property is eligible to become RainWise. -
Do your research
Want more information about the program and getting your installation? Email us, chat with us at an event, or check out our library of webinars and resources. -
Choose a contractor
If you would like additional support choosing a contractor, fill out this RainWise contractor matchmaking survey and we will help you find the best contractor for your needs.
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Follow the rebate process
Work with your RainWise contractor to follow the rebate process and enjoy your RainWise installation!
RainWise & You
Watch this video to learn about how you can become part of making Seattle’s waterways cleaner through RainWise.
Not eligible for RainWise?
Green Stormwater Mini-Grants are available in the King County Wastewater Treatment Division service area.
If you are located in unincorporated King County, the RainScapes program is available to incorporate GSI projects at residential and commercial properties.
Here are some other resources: GSI Western WA Resources.
Additional information
Check out our library of webinars and resources.
Green Stormwater Infrastructure (GSI) Progress Report
Interested in getting a glimpse of participating in Green Stormwater Infrastructure (GSI)? Read our most recent GSI progress report to learn about combined sewer overflow reductions, water quality benefits, retrofitting older developments, and workforce development happening from RainWise and other programs across King County.
Clean Water Stories Blog
Visit our blog, Clean Water Stories, for RainWise articles.