A lot of us just assume the water filter coming out of the tap is fine. You turn on the faucet, fill up a glass, and that's pretty much the end of the thought process. But when you really stop and think about it, there's no way of knowing exactly what traveled through those pipes before that water reached your kitchen. The reality is that many water systems are old, and between worn-out infrastructure, agricultural runoff, and industrial pollution, tap water can pick up all k