§611.592. Frequency of State Monitoring

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This Section applies to State-only MCLs marked as "additional State requirements" in Section 611.300 and for which there are no specific monitoring, reporting, or public notice requirements among the NPDWRs.

a) A CWS supplier using surface water sources must repeat analyses for the State-only MCLs at yearly intervals.

b) A CWS supplier using groundwater sources must repeat analyses for the State-only MCLs at three-year intervals.

BOARD NOTE: This is an additional State requirement.

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

                    
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