Wildcat Marsh is the wetlands delta formed by the mouth of Wildcat Creek at its confluence with Castro Creek in Richmond, California.^[1] The marsh is critical habitat for endangered species^[1] and has been contaminated^[2][3] and damaged^[1] by runoff from the Chevron Richmond Refinery^[2][3] and the city's landfill^[1] and a salvage yard.^[1] The marsh was isolated from tidal effects but restoration efforts are underway^[1] as is the closure of the landfill^[1] and cleanup of the mudflats contaminated by mercury^[2][3] and PAHs^[2][3] from the refinery.^[2][3]