During California’s severe five-year drought, groundwater levels fell to record lows and people in farming communities from Tulare County to Paso Robles saw their wells go dry.  Now researchers have analyzed records for about 2 million wells across 17 western states from Texas to Oregon, and they estimate that one out of every 30 wells was dry between 2013 and 2015.  The researchers also found dry wells were concentrated in farming areas such as California’s Central Valley and the High Plains. In some areas, they estimated that up to one-fifth of wells were dry.