Rain gardens are landscaped areas designed to capture and filter stormwater runoff from rooftops, driveways, and other hard surfaces. They provide multiple benefits such as protecting streams and Puget Sound, recharging groundwater, filtering pollution and reducing local flooding, and providing habitat. Rain gardens are easy and inexpensive to install and require little maintenance. They can remove 70-83% of phosphorus, 93-98% of metals, 68-80% of nitrogen, and 90% of solids, pesticides, and bacteria from runoff. The document describes several rain garden programs and installations that have occurred across Puget Sound to manage stormwater and reduce flooding at residential and community sites.