In April 2019, EGLE began monthly sampling of Public Water Supplies sampled during Phase I of the Statewide PFAS Sampling Survey which utilize surface water as a source. This sampling will be done for six months and will help determine if there are changes in PFAS levels for these 65 supplies over time, due to their use of surface water as a source.
In addition to PFAS testing for these 65 supplies, EGLE will collect and analyze samples for select cyanotoxins related to harmful algal blooms (HABs), to investigate whether these surface water sources are being affected. This testing program is being conducted by the EGLE Drinking Water and Environmental Health Division Community Water Supply Section. The results of this initiative will be provided by that group, once results become available.
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.