Well, depends where you live... I spent a summer in Santa Clara in a really crappy apartment and the water always developed this weird white film (or was it a p

Well, depends where you live... I spent a summer in Santa Clara in a really crappy apartment and the water always developed this weird white film (or was it a precipitate? I forget) if you let it sit. I considered it very suspicious and did not drink water from the tap at home - I got my fill at work.