I've been looking around and both at home and at college it seems the biggest resevoirs of water if running water were to be lost are swimming pools. My parents have a pool in the back yard and there are a couple on campus. So, how safe is it to drink pool water? In the short term I doubt it would have any effects, but then again, the water here at school burns my eyes readily enough, so it could have an effect if drank in quantity. While at home, my mom's dog doesn't seem to have any problems drinking primarily out of the swimming pool.
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A gentleman should always be able to break his fast in the manner of a gentleman where so ever he may find himself.--Good Omens