At what temperature is chlorine most effective according to COMAR?

Chlorine is most effective at a temperature of 75 degrees Fahrenheit according to the Code of Maryland Regulations (COMAR). At this temperature, the disinfection process is optimized, allowing chlorine to react more readily with microorganisms in water. The effectiveness of chlorine as a disinfectant is influenced by temperature—higher temperatures generally increase the reaction rate and improve the efficacy of chlorine in killing pathogens.

At 75 degrees Fahrenheit, the chemical stability of chlorine is balanced, allowing it to perform effectively in a variety of applications, including water treatment. As temperatures fluctuate—either rising significantly above or falling below this optimal point—chlorine’s effectiveness can diminish, leading to potential issues in achieving adequate disinfection. This understanding is crucial for ensuring safe drinking water standards and public health protections.