Robert Carvalho, co-owner of Hanford, Calif.-based West Valley Drilling, started drilling water wells in the mid ‘80s and says he gave up the gig after just three or four years.
A never-ending challenge in tracking groundwater availability and sustainability is the fact that it’s hidden underground, making it difficult to accurately characterize, says Kevin Dennehy, national coordinator of the U.S. Geological Survey’s (USGS) Ground-Water Resources Program.