What is the implication of the term 'non-enforceable' regarding MCLGs?

The term 'non-enforceable' in the context of Maximum Contaminant Level Goals (MCLGs) signifies that these goals represent ideal levels of contaminants in drinking water aimed at protecting public health, yet they do not come with legal obligations for water utilities to comply with them. MCLGs are set by the Environmental Protection Agency (EPA) to reflect what is deemed safe for human health, based on factors like risk levels and exposure duration.

Because MCLGs are non-enforceable, utilities are not legally bound to meet these goals, which distinguishes them from Maximum Contaminant Levels (MCLs), which are enforceable regulations that must be adhered to. This allows MCLGs to serve as public health benchmarks or targets that influence policy and regulatory measures without imposing direct legal requirements on water suppliers.

In contrast, flexible guidelines or mere suggestions imply a degree of compliance that does not accurately characterize the purpose of MCLGs, as they are not intended to direct operational behavior in the same way that enforceable standards would. Therefore, MCLGs exist to guide water safety goals without mandating enforcement, making the correct understanding of their role crucial for water operators and public health officials.