Section 2
Item 3: MCL or Treatment Technique Violation footnote statements
If your system had an action level exceedance, MCL or treatment technique
violation during the CCR reporting year, a “YES” appears in the violation column
of the “Water Quality Data” table.
When a MCL or treatment technique violation occurs, the Illinois EPA generated
footnote is INCOMPLETE. You must add the following information to the
footnote:
· Length of the violation/exceedence;
· corrective action being taken by the water supply; and
· the mandatory health effects language. For your convenience, the
mandatory health effect language has been included.
In some cases, a “YES*” will appear in the violation column, but the level found
is less than the MCL. While the level found during the calendar year was below
the MCL, a violation was recorded because the running average exceeded the
MCL. The running average is determined after each quarter by averaging the four
most recent quarterly results. In this case, data collected during the prior calendar
year caused the running average to exceed the MCL in the current year.
Calculating running annual averages is further explained in Appendix A.
If a double asterisk (**) appears in the violation column, the level found is greater
than the MCL, but no violation exists because the running annual average never
exceeded the MCL. A special statement is needed in the footnote page explaining
this situation; it has been included in your Illinois EPA generated footnote page.
Calculating running annual averages is further explained in Appendix A.
