What is the purpose of MCLGs in relation to potable water standards?

The purpose of Maximum Contaminant Level Goals (MCLGs) is to establish ideal levels of contaminants in drinking water that are considered safe for public health. MCLGs are non-enforceable health-based goals set by the Environmental Protection Agency (EPA), reflecting the level of a contaminant in drinking water below which there is no known or expected risk to health.

While these goals are important for guiding public health decisions, they differ from legally enforceable standards, which are designed to ensure compliance and safety in drinking water systems. MCLGs are primarily intended to inform regulatory and policy decisions rather than serve as mandatory benchmarks. This allows for an idealistic approach to achieving a safer drinking water supply, focusing on health considerations without the constraints of enforceability that come with Maximum Contaminant Levels (MCLs).

In summary, MCLGs play a critical role in articulating the best possible health outcomes regarding the presence of contaminants in drinking water, guiding further action and research into water standards.