What is the standard measurement for expressing chlorine dosage in drinking water?

The standard measurement for expressing chlorine dosage in drinking water is parts per million (ppm). This unit is widely used in the water treatment industry because it effectively conveys the concentration of chlorine in relation to the volume of water being treated. Concentrations in ppm indicate how many parts of chlorine exist in one million parts of water, making it an intuitive way to understand and apply chlorine levels necessary for disinfection.

Chlorine is a critical component in ensuring safe drinking water, with ppm providing a clear, standardized way to monitor and control its dosage. This is essential for achieving effective pathogen removal and compliance with health regulations. Other measures, such as milliliters per liter or grams per cubic meter, may be relevant in specific contexts but are not as commonly used in public water treatment settings for this purpose. Ounces per gallon is also not a typical measurement within the water treatment field as it does not align with the standard practices for describing the dosage of disinfectants like chlorine.