Last week the California Water Resources Control Board’s Drinking Water Program announced a maximum contaminant level of 10 parts per billion for hexavalent chromium in water. Seven of Banning’s wells are known to have chromium 6 contamination. Chromium 6, made famous for polluting the waters highlighted in the film “Erin Brockovich” is deemed 500 times the state’s public health goal at 10 parts per billion.