Is there a megathread around here? Can someone share a link if it does exist?

México. NO. Do not drink the tap water. Boiling does not help. It has a bunch of heavy metals and other contaminants in it. It sucks because mechanical filtering is incapable of removing them effectively. Reverse osmosis does but it is a challenging and expensive process to properly keep in your house. We always buy bottled water. Trucks deliver twice a week.