USGS Finds Chromium and Nitrate Above Benchmarks in Western Central Valley Groundwater
October 12, 2026
October 12, 2026
WASHINGTON, Oct. 12 (TNSLrpt) -- Inorganic contaminants exceeded public drinking-water benchmarks in an estimated 30% of groundwater resources used for domestic supply in California's western Central Valley, according to the U.S. Geological Survey's 'Quality of Groundwater Used for Domestic Supply in the Western Central Valley, California--2023.' Written by Kirsten E. Faulkner and Bryant C. Jurgens, Scientific Investigations Report 2026-5069 identifies hexavalent chromium and . . .