Definitions for "Maximum contaminant level"
Keywords:  mcl, mclg, contaminant, feasible, epa
Maximum permissible level of a contaminant in water that is delivered to the users of a PWS. Maximum containment level is defined more explicitly in Safe Drinking Water Act (SDWA) regulations (40 CFR Section 141.2).
In the SDWA, an MCL is defined as "the maximum permissible level of a contaminant in water which is delivered to any user of a public water system."
The MCL is the amount of a water contaminant which must be reported to state authorities if discovered by a local water treatment plant .