Is the water safe to drink inTap water safety in Paraguay The water may be safe to drink in large urban areas in Paraguay. This means, the water is chlorinated and locals drink it from the tap with no problems. However, some strains of E. coli which you may not have immunity for, could be present in small concentrations causing diarrhea. Bottled water is recommended for the first few weeks while your body develops immunity. However, in rural areas within Paraguay, the water should be considered contaminated. Bring all tap water to a good rolling boil if you want to drink, brush your teeth or make ice cubes. Otherwise, buy capped bottled water from reputable brands. City tap water safety info for Paraguay