What do MCLs refer to in environmental health regulations?

MCLs, or Maximum Contaminant Levels, refer specifically to the highest permitted levels of certain contaminants allowed in drinking water, as established by the Environmental Protection Agency (EPA) under the Safe Drinking Water Act. These levels are set to protect public health by ensuring that drinking water does not contain harmful substances at concentrations that could pose a risk to consumers.

MCLs are derived from scientific assessments and are based on health effects, occurrence data, and treatment feasibility, which allows for a comprehensive approach to ensuring water safety. The values designated as MCLs are critical in regulatory compliance and provide a standard that water suppliers must meet to ensure the safety of public drinking water.

In contrast, other options do not have established definitions within environmental health regulations, which highlights the importance of understanding MCLs as a key component in water quality management and public health protection.