Section 611.121  Maximum Contaminant Levels

a)         Maximum Contaminant Levels.  No person may cause or allow delivering to any user water that exceeds the MCL for any contaminant.

b)         The MCL for any particular contaminant applies in lieu of any narrative finished water quality standard.

BOARD NOTE:  This Section derives from the definition of "MCL" in 40 CFR 141.2.

(Source:  Amended at 47 Ill. Reg. 16486, effective November 2, 2023)