From Water Deeply:
“In California’s agricultural heartland, the San Joaquin Valley, excessive pumping of groundwater has resulted in subsidence, damaging crucial infrastructure, including roads, bridges and water conveyance. A study last year from NASA’s Jet Propulsion Laboratory in Pasadena, California, found overpumping of groundwater since the 1920s had caused parts of the San Joaquin Valley to sink as much as 28ft.
But groundwater overpumping may have another serious side effect, according to a study published June 5 in the journal Nature Communications. Researchers found that recent groundwater pumping caused an increase in the concentrations of arsenic in the aquifer. … “
Read more from Water Deeply here: Toxic Trap: Groundwater Overpumping Boosts Arsenic in California Aquifer