John Heinz National Wildlife Refuge at Tinicum's role filtering urban runoff

John Heinz National Wildlife Refuge at Tinicum preserves tidal marsh and wetland habitats that receive and help filter urban runoff before it reaches the Delaware River. Refuge wetlands and restoration projects are documented as providing stormwater treatment functions and habitat benefits for the region. The refuge sits adjacent to industrial and airport areas and is managed to balance wildlife conservation with mitigation of urban stormwater impacts.