Mike is of course absolutely right about not drinking water from the tap, but not *exactly* for the right reason. There are no water lines in Oaxaca. Water is brought in trucks, labeled agua para humanos, and is stored in water cisterns. When the cisterns run out, that is the end of water for that residence, hotel, or what not until the water trucks arrive and pump more water into the cisterns. Obviously it is possible for the cisterns to become contaminated with sewer overflow.
Originally Posted by mikewhi