The initial compliance monitoring period ran from the date of MCL promulgation (August 3, 2020) until February 3, 2021, and included two groups of supplies:
Those supplies which had collected a sample during EGLE's statewide PFAS survey and returned a PFAS result with a detection greater than half of one of the proposed MCLs AND those supplies which had not previously collected a PFAS sample during EGLE's statewide PFAS survey, would sample during the first full quarter following promulgation (October 1, 2020 - December 31, 2020).
All remaining supplies which had collected a sample during EGLE's statewide PFAS survey would sample during the first six months following promulgation (August 3, 2020 - February 3, 2021).
Visit Michigan.gov/PFASresponse for more information.
