At the Shiloh elementary school near Modesto, drinking fountains sit abandoned, covered in clear plastic. At Mom and Pop’s Diner, a fixture in the Merced County town of Dos Palos, regulars ask for bottled water because they know better than to consume what comes out of the tap. And in rural Alpaugh, a few miles west of Highway 99 in Tulare County, residents such as Sandra Meraz have spent more than four decades worrying about what flows from their faucets. “You drink the water at your own risk,” said Meraz, 77. “And that shouldn’t be. We have families here with young children.”