Louie Campos stopped drinking the water from his faucets in Visalia, California, so long ago that it takes him a minute to recall just how many years it has been since he held a glass to the tap and took a swill. By his closest approximation, the plainspoken 43-year-old has ripped through a 24-pack of bottled water a week for the last eight years. Bottled water, he says, is a hidden tax Visalia’s residents must pay to live there.