Neil Jobe talks in his home March 8, 2022, in Primm Springs, Tenn., which sits near Lick Creek. Several times a year, when there is heavy rain and a nearby creek floods, the family's well water turns "dingy," according to the Jobes. While estimates vary, roughly 53 million U.S. residents, about 17% of the population, rely on private wells, according to a study done in part by Environmental Protection Agency researchers. (AP Photo/Mark Humphrey)