City water is highly regulated by the Environmental Protection Agency. The EPA regulations, however, only cover contaminants they have determined to be harmful and in the dosages they recommend.In the city you are definitely drinking chlorine in your water – it is required by law. Chlorine (Cl2) has done wonderful things to reduce or eliminat…e cholera among other water born diseases. On the other hand, chlorine is a poison at higher concentrations and can be absorbed through the skin and breathed in as a gas. The Maximum Residual Disinfectant Level (MRDL) in drinking water is 4 milligrams per liter or 4 parts per million. Other disinfection chemicals include Chloramines (Cl2- or chlorine with a little ammonia) or Chlorine Dioxide (ClO2) which has an MRDL of .8.

When these chemicals are combined with orgic compounds, they produce Trihalomethanes which are known cancer causing agents. Total Trihalomethanes (TTHM) are also regulated by the EPA at .8 parts per million.

What to do? The simplest solution is carbon filtration which will absorb the chlorine in your drinking water.  The best solution is a reverse osmosis system.