Early one morning in late April, Parvinder Hundal stood beside a hole in the ground at the edge of his almond farm near Tulare in the Central Valley of California. The hole, which was about the size of a volleyball and was encased in a shallow block of concrete, was the opening of a well, one that went hundreds of feet into the earth. He had paid $100,000 to have it drilled, but it wasn’t producing water. Mr. Hundal was hoping that if he cleaned out the well, the water would start flowing again. On the nearby trees, some leaves had turned yellow and the almond husks appeared smaller than usual. In February, Mr. Hundal received emails from various water […]