Water is a life-sustaining fluid that’s essential to health, but if you're drinking straight out of the tap, it can undermine your health. When you drink tap water, you’ll likely be getting more than you bargained for — chlorine, fluorine compounds, Trihalomethanes (THMs), assorted hormones, pesticides and even trace amounts of prescription drugs. It can be a witches’ brew of health-killing compounds, but you can improve the odds. Here’s the low-down on water, and how to turn