What is a Maximum Contaminant Level Goal (MCLG)?

Maximum Contaminant Level Goal (MCLG) is the level of a contaminant in drinking water below which there is no known or expected risk to health.  MCLGs allow for a margin of safety and are non-enforceable public health goals.

For more information, view EPA's website


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1. What is a Public Health Goal (PHG)?
2. What is a Maximum Contaminant Level Goal (MCLG)?
3. What is a Maximum Contaminant Level (MCL)?