Municipal water treatment adds chlorine (0.5-2.0 mg/L) or chloramine to kill bacteria and viruses in the distribution system. It is safe to drink at these levels -- the EPA allows up to 4.0 mg/L. But many people can taste and smell chlorine at concentrations as low as 0.5 mg/L. The water is not dangerous. It just tastes bad. The fix ranges from a $15 pitcher filter for drinking water to a $100-$300 whole-house carbon filter that removes chlorine from every faucet, shower, and appliance in the house.