Originally posted by: Mill
Cancun has its own water filtration system, and all the nice hotels have a system on top of that as well. Drinking the water there is safe.
Just don't eat a taco from a street vendor in the ghetto area of Cancun. That sucked for about a week.
Mill, I'm not sure where you're getting this information from, but let me tell you, do not drink the tap water here. Cancun's water filtration is nothing like the States and while some hotel's do have their own filtration system, the upkeep and maintenance is highly suspect.
You may get by for a while drinking tap water here but sooner or later you will get sick from it. Drink bottled water anywhere you go in Mexico; the locals do not drink tap water and I don't suggest that tourists do either.
Edit: BTW, using ice is fine, they make it from purified water, and if you get a plain glass of water in a restaurant, that will be purified water also.