What does the 80/60 Rule pertain to in water quality?

The 80/60 Rule pertains to the maximum contaminant levels (MCLs) for Total Trihalomethanes (TTHMs) and Haloacetic Acids (HAAs) in drinking water. Specifically, this rule sets the MCL for TTHMs at 80 micrograms per liter (µg/L) and for HAAs at 60 µg/L. These limits are established to protect public health, as both TTHMs and HAAs are byproducts of chlorine disinfection in water treatment and have been associated with potential health risks, including an increased risk of certain types of cancer.

Understanding this rule is crucial for water operators as it helps ensure compliance with regulations aimed at maintaining safe drinking water standards. Monitoring levels of these contaminants is an essential part of water quality management, making sure that their concentrations do not exceed the defined limits to protect consumers.