In 2019 Michigan began a process to establish maximum contaminant levels (MCLs) for seven PFAS compounds. Yesterday (July 22, 2020) the State issued a Press Release that the proposed MCLs have completed the regulatory process and the final MCLs are expected to become effective on August 3, 2020.
Link to Michigan Press Release and a table presenting the seven MCLs:
https://www.michigan.gov/som/0,4669,7-192-47796-534660–,00.html
Here are the seven MCLs:
PFNA – 6 parts per trillion (ppt)
PFOA – 8 ppt
PFHxA – 400,000 ppt
PFOS – 16 ppt
PFHxS – 51 ppt
PFBS – 420 ppt
HFPO-DA – 370 ppt
Background
In 2017 Michigan created MPART [Michigan PFAS Action Response Team] in response to PFAS contamination throughout the State. MPART consists of members from the following State government departments: Environment, Great Lakes and Energy; Health and Human Services; Natural Resources; Agriculture and Rural Development; Transportation; Military and Veteran Affairs; and Licensing and Regulatory Affairs.
In March 2019, Governor Whitmer directed MPART to form a Science Advisory Workgroup that would “inform the rulemaking process for appropriate MCLs for PFAS.” In June 2019 the three-member Science Advisory Workgroup recommended “health based” levels for the seven PFAS. Three public hearings were held on the proposed MCLs in January 2020.
