Most Californians rely on groundwater in some way, through the kitchen faucet, when buying food, or at a green local park to relax and recreate. Those underground aquifers are even more important during droughts. In California’s Southern San Joaquin Valley, groundwater pumping more than tripled in the 2012-2016 drought to make up for lost rain. But that over-pumping comes at a cost, causing land to sink as much as two feet a year, damaging bridges, roads, and houses, and drying up drinking water wells and rivers. The people and places most hurt are the ones without the money to drill down to find diminishing groundwater.