The Department of Water Resources (DWR), California Department of Fish and Wildlife (CDFW), and California State Parks have confirmed presence of the invasive golden mussel at Pyramid Lake in Los Angeles County and Silverwood Lake in San Bernardino County. These lakes are the southernmost State Water Project (SWP) reservoirs where golden mussels have been detected. The invasive species was recently discovered during a routine water test by DWR; in response, State Parks has updated Silverwood Lake’s boat inspection protocols, effective immediately.