If you are traveling to mexico, drinking water there should be in a bottled of mineral water. It is safer to drink soda and other beverages instead of  water.

If you want to drink water during your travel to Mexico, try buying a bottled mineral water. So, you may want to be extra careful when eating in a restaurant in Mexico, make sure to stick with the soda. You can also ask the waiter to waitress if the ice is good enough to put in your drinks.