For a safe drinking water supply, what is the typical acceptable level of chlorine?

The typical acceptable level of chlorine for a safe drinking water supply is indeed between 0.5 to 4.0 mg/L. Chlorine is commonly used as a disinfectant in water treatment processes because of its effectiveness at killing pathogens and providing residual disinfection throughout the distribution system. The concentration range ensures that water is effectively treated while minimizing the potential for adverse health effects associated with higher chlorine levels.

Maintaining chlorine levels within this range is crucial, as concentrations above 4.0 mg/L may result in unpleasant taste and odor in drinking water, as well as potential health concerns. Conversely, levels below 0.5 mg/L may not provide sufficient disinfection to protect against harmful microorganisms. Thus, the specified range balances the need for effective disinfection with public health and consumer acceptability.