What are U.S. Environmental Protection Agency’s Maximum Contaminant Levels?
Under the authority of the Safe Drinking Water Act, the U.S. Environmental Protection Agency (USEPA) establishes drinking-water standards, such as Maximum Contaminant Levels (MCLs), to limit the level of contaminants in the Nation’s drinking water. An MCL is a legally enforceable standard that sets the maximum permissible level of a contaminant in water that is delivered to any use of a public water system. An MCL is set as close to the maximum level of a contaminant in drinking water at which no known or anticipated adverse effect on human health would occur, and which allows an adequate margin of safety. For more information, refer to sidebar 17 of VOC Circular 1292 and http://www.epa.gov/safewater/creg.html.
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