When Ramona Hernandez turns on her kitchen faucet in El Adobe, an unincorporated town just a few miles southeast of Bakersfield, the water that splashes out looks clean and inviting. But she doesn’t dare drink it. … Drinking the tap water in this tiny community of dusty ranches and unpaved roads could expose Hernandez to arsenic. So, for years, she and her husband, Gerardo, have shuttled twice a week to the nearby town of Lamont to load up on bottled water. At a cost of about $80 a month, it’s enough for drinking and cooking.