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The raingarden along George Street at Graf Park, Yagoona ​helps to reduce the impact of human activities on the environment by removing harmful pollutants from stormwater runoff before it flows down the drain. 

It may look like a regular garden bed, but under the surface a specialised sandy soil layer slows down the flow of water to filter and trap pollutants, while native plants absorb excess nutrients for growth. The raingarden will treat runoff from approximately 1.3 hectares of residential area upstream (including a portion of the Hume Highway), preventing pollutants reaching the Cooks River. 

The raingarden was constructed with funding from the Australian Government through the Sydney Metropolitan CMA’s Botany Bay Water Quality Improvement Program, funding from the NSW Government's Urban Sustainability Program through OurRiver (the Cooks River Sustainability Initiatives) and funding from your Stormwater Levy.