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web banner: Be RainWise, rebates for rain gardens and cisterns, SPU and KC 

What's the Problem?

With every storm, rain carries pollutants off our roofs, driveways and other hard surfaces to local creeks, Lake Washington and the Puget Sound. During big storms, the sheer volume of this “stormwater” can cause sewer overflows, and erode hillsides and stream banks. Rain gardens and cisterns can help control this stormwater with your help.

How to become RainWise

The RainWise program provides rebates that cover most or all of the cost of installing cisterns and rain gardens on your property. To receive a rebate, you must live in an eligible combined sewer overflow basin. The average rebate has been around $4,400.

You can also call the Garden Hotline at 206-633-0224 for eligibility information.

Visit the 700 Million Gallons website for more information or go on a RainWise virtual garden tour  !

rain garden


Learn more

Download the following documents to learn more about this program.

RainWise flyerBe RainWise flyer

Cover of the 2018 GSI Accomplishments ReportRainWise helps private property owners manage the rain that falls on their roofs. Information is included in the Green Stormwater Infrastructure Accomplishment Report .

Not eligible for RainWise?

Green Stormwater Mini-Grants are available in the King County Wastewater Treatment Division service area.

Here are some other resources: GSI Western WA Resources

Janice Johnson
CSO Control Program