What is the Maximum Contaminant Level (MCL) for Total Trihalomethanes in mg/l?

The Maximum Contaminant Level (MCL) for Total Trihalomethanes (TTHMs) is established at 0.080 mg/l, which is significant for protecting public health. TTHMs are byproducts of chlorination that can occur when chlorine is used to disinfect drinking water. They are a concern because they have been associated with potential health risks, including an increased risk of cancer when present in high concentrations over extended periods.

The regulation of TTHMs at this level helps ensure that water utilities minimize the formation of these compounds while still effectively disinfecting water to eliminate pathogenic organisms. Maintaining levels at or below this MCL ensures that water remains safe for consumption and adheres to federal standards set by the Environmental Protection Agency (EPA). Thus, understanding the MCL is crucial for water operators in monitoring and managing water quality effectively.