On August 3, 2020, the State of Michigan adopted new regulations limiting seven PFAS chemicals in municipal drinking water. The new drinking water standards also update Michigan's existing groundwater clean-up criteria of 70 ppt for PFOS and PFOA. The new groundwater standard is 8 ppt for PFOA and 16 ppt for PFOS.
On December 21, 2020, the following 5 additional PFAS compounds became groundwater cleanup criteria: PFNA (6 ppt), PFHxS (51 ppt), PFHxA (400,000 ppt), PFBS (420 ppt), and HFPO-DA (370 ppt). EGLE staff use all 7 PFAS criteria to guide groundwater investigations, protect public health, and identify MPART PFAS sites.
Call 800-662-9278 for assistance with reading or interpreting. If you have questions or comments on the map, please contact EGLE-Maps@Michigan.gov.
MPART is implementing enhanced protocols (available here: MPART Continuity of Operations Plan for Residential Well Sampling Considering EO 2020-92) to prevent the spread of COVID-19 during resumed activities to identify and reduce exposures to PFAS in drinking water from residential wells.
- Protocols updated October 2020