Learn about RainWise


Seattle RainWise



With every storm, rain carries pollutants off our roofs, driveways and other hard surfaces to local creeks, Lake Washington and 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 does a rain garden work?

A rain garden is a shallow depression containing spongy soil and a variety of plants that thrive in northwest sun, soil and moisture conditions. It collects water from your roof downspout and allows it to safely soak into the ground.

What is a cistern?

A cistern is a large above-ground container used to collect roof water. It is like a huge rain barrel and can hold 200 or more gallons. During the winter, cisterns store rain to reduce the amount of water entering the sewer system. In the summer, this water can be used for watering.


Learn More



Here are some RainWise Rebate resources to get you started!

Download the RainWise Fact Sheet

Spanish Fact Sheet

Vietnamese Fact Sheet

Take a RainWise Virtual Tour

Attend a RainWise Event

Get details on the RainWise Rebate

Learn about rain garden and cistern Maintenance


Learn More



Seattle Rain Garden Cistern