What is the required chlorine concentration for an effective tank disinfection over a standard duration?

For effective tank disinfection, a chlorine concentration of 10 mg/L is generally recognized as sufficient to achieve the necessary microbial kill rates over a standard contact time. This concentration helps ensure that harmful bacteria, viruses, and protozoa are effectively neutralized, providing safe drinking water.

Disinfection effectiveness is influenced by various factors, including the water's temperature, pH, and the presence of organic materials, but 10 mg/L is a well-established guideline that balances efficacy with safety, preventing any potential over-chlorination that could lead to undesirable tastes and odors or even health risks if concentrations are too high.

Higher concentrations, while potentially more effective in killing pathogens, are not typically required for standard disinfection practices and could lead to regulatory challenges or adverse effects on water quality. Thus, 10 mg/L remains the recommended concentration for ensuring a thorough disinfection of water storage tanks within an acceptable timeframe.