The amount of chlorine needed to kill harmful organisms depends on the temperature and acidity of the water and the length of time the organisms are in contact with the chlorine. Consult a water treatment specialist or engineer for specific assistance. An activated carbon filter can be used to remove THMs, along with the chlorine, taste and odor, and any other hazardous organic chemicals. Carbon filters must be changed periodically. In this type of disinfection, the filtered water enters a canister containing an ultraviolet light fixture.
Ultraviolet radiation kills bacteria and viruses.
This system does not produce THMs, nor does it disinfect the household plumbing. The ultraviolet lamp must be changed periodically. Warning - Be sure to boil for five minutes any untreated surface water used for drinking. This will kill any dangerous organisms in the water. Unboiled water can be used to wash dishes, as long as the dishes are allowed to air-dry before use.