When you visit American city,
You will find it very pretty.
Just two things of which you must beware,
Don’t drink the water and don’t breath the air!
– Tom Lerher
While the mains water may well be fine, I’ve been told it’s good policy not to drink the tap water in hotels, because rather than coming fresh from the mains it probably comes from a tank in the roof which may have all kinds of crap in it. Just like at home I don’t drink the water from the upstairs bathroom tap, as that comes from the tank in the loft.
Edit… I see this has been addressed a couple of posts up - I didn’t see page 2!