As far as I know, it's not detrimental to humans. I mean, bottled water tastes better and all, but there's really no other benefit to use the latter for us; However some could argue that tap water IS better than bottled because of the fluoride for your teeth. I fill my dog's dish out of the sink tap as well, and she's 10, perfectly healthy. I wouldn't however, drink tap water in Mexico or Texas for the life of me. I've been to both places and had GOD-AWFUL diarrhea from drinking the water; they have horrible cleaning processes. Most places in urbanized societies have sanitary and safe conditions for drinking water.
Reptiles, on the other hand, are likely vastly different in regard to water tolerance if this is the case for them.