In March 2019, the Michigan Department of Environment, Great Lakes, and Energy (EGLE) began quarterly sampling of Public Water Supplies sampled during Phase I which had Total Tested PFAS levels of at least 10 ppt but did not exceed the USEPA LHA (70 ppt PFOS+PFOA). This sampling will be done for one year (four quarters) and will help determine if there are seasonal changes in PFAS levels for these 61 supplies, to help prioritize and direct next steps.
Two systems which had Total Tested PFAS levels of at least 10 ppt but did not exceed the USEPA LHA (70 ppt PFOS+PFOA) use surface water as a source (Ann Arbor and Sims-Whitney Utilities Authority), and will be sampled as part of the Monthly PFAS Monitoring Program for Michigan’s Surface Water Supplies, including the Great Lakes.
Sampling results will be provided on this page, once they are available.
Other PFAS testing initiatives for drinking water:
Understanding the Sample Results
Definitions of the information provided in the sampling results tables:
*Results are provided in parts per trillion. A part per trillion (ppt) is the equivalent of 1 drop of water in 20 Olympic-size swimming pools
The table below shows testing results from the statewide sampling initiative for Michigan public water supplies. Additional results from the testing will be added as they become available.
The Public Water Supplies dataset is available for download on the data.Michigan.gov open data portal.