What is the MCL for HAA5?

The maximum contaminant level (MCL) for haloacetic acids, specifically HAA5, is set at 0.060 parts per million (ppm). This value is established by the Environmental Protection Agency (EPA) to protect public health from potential adverse effects of these disinfection byproducts, which can form when chlorine and other disinfectants react with organic matter in water. Maintaining HAA5 levels below this MCL is crucial for water suppliers, as exceeding this limit indicates a potential health risk and requires measures to mitigate the levels in the drinking water supply. Understanding this threshold is essential for water operators in ensuring compliance with safety regulations and safeguarding community health.