Drinking Water in Medellin
The tap water in Medellin is perfectly safe to drink, there is no need to buy bottled water or worry about the ice in your drink. The water might taste a little chlorinated, but it’s convenient to know that you always have a free and safe option for water anywhere in the city.
If you must buy water then a small 600ml bottle of water from a shop costs about 2,000-3,500 COP and about 4,500 COP in a restaurant. Some popular local brands are shown here. At a restaurant you can ask for tap water however it's amazing how many waiters will forget to bring it.
There are several companies that deliver the large containers of water if you have a dispensing stand and you can buy various types of water filters at Homecenter.