What is a Maximum Contaminant Level? How does that differ from a Maximum Contaminant Level Goal?
The Maximum Contaminant Level (MCL) is the maximum amount of a particular contaminant that is allowed in a public drinking water. Water suppliers must notify their customers if a contaminant exceeds the MCL. The Maximum Contaminant Level Goal (MCLG) is the level of a contaminant in drinking water at which there is no known or anticipated health threat from that contaminant to a person who consumes the water.
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