First posted April 25, 2023 For additional information, contact: Director,California Water Science CenterU.S. Geological Survey6000 J Street, Placer HallSacramento, California 95819 Between 1952 and 1964, hexavalent chromium, Cr(VI), was released into groundwater from the Pacific Gas Electric Company (PG&E) Hinkley compressor station in Mojave Desert 80 miles northeast of Los Angeles, Californi...