This video covers chlorine residual measurements and the required minimum chlorine levels. Chlorine is used to oxidize iron and as a disinfectant. In this video, we discuss chlorine as a disinfectant. The minimum chlorine levels are 0.3 mg/L free chlorine or 1.5 mg/L total chlorine. The level depends on if you are using free chlorine or chloramines as the disinfectant.
Disinfection is used to kill harmful bacteria and viruses. Disinfection is one of many ways or barriers to keep water safe.