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King County Wastewater Treatment Division (WTD) is pleased to announce a request for proposal for the RainWise Outreach Grant Program to provide funding for non-profit organizations and small businesses to help with promotion and community engagement for the RainWise program.

Apply now

We are now accepting grant applications . The application deadline is midnight Sunday, November 15, 2020.

Download Program Request for Proposal for more information.

The RainWise program is a King County WTD and Seattle Public Utilities (SPU) partnership to address stormwater pollution and combined sewer overflows by offering rebates to private property owners who install rain gardens and cisterns to manage the rain that falls on their property. This grant program will fund efforts in King County’s combined sewer overflow basins . More information on RainWise can be found at

Eligibility: The following organizations are encouraged to apply:

  • 501 (c) (3) non-profit organizations
  • businesses that are certified as a Small Contractor and Supplier with King County’s Business Development and Contract Compliance office and self-identify as a woman or minority-owned business.

Grants are being sought to accomplish goals in five Program Areas below.

  1. Embed equity and social justice in RainWise outreach and program delivery
  2. Provide innovative and effective virtual engagement in the time of COVID
  3. Conduct outreach, marketing and customer support to interested residential property owners in eligible King County RainWise basins
  4. Execute outreach, marketing and customer support to RainWise Big Roof property owners in King County RainWise basins
  5. Green Stormwater Infrastructure education and job training

Please look at the attached request for proposal for detailed information.

For more information contact

1407_GreatMariaraingardenMariacloseupThe RainWise program currently diverts the rain that falls on over 54 acres of roof tops and keeps it from overwhelming the sewer system! These outreach grants will help continue this wonderful effort.

1506_UnitedMethodistChurchwCisternsMultiple faith-based organizations and other Big Roof properties have become RainWise to help the environment, beautify their grounds, and take advantage of summer water catchment.

1506_RainGardenWSeaNHope114The RainWise program provides rebates for rain gardens and cisterns on private property as a solution to stormwater pollution and combined sewer overflows (CSOs).

1411_DeniseandsonRGandsignRainWise Outreach Grants are a new tool to allow non-profit organizations and small businesses help grow the RainWise program.