Carcinogens complicate chlorine question.
D002273:Carcinogens; D004203:Disinfection; D004782:Environmental Health; D006843:Hydrocarbons, Chlorinated; D014481:United States; D014877:Water Pollution, Chemical; D014881:Water Supply
D002273:Carcinogens; D006843:Hydrocarbons, Chlorinated