Michigan Department of Environment, Great Lakes, and Energy summary of the recent PFAS data for fish samples in the Grand River and tributaries
Grand River:
PFOS was detected in the fish collected from the Grand River upstream of the Smithville dam
Flat Watershed:
Cowden Lake: Good news, bluegill collected from Cowden Lake southeast of Howard City had non-detectable concentrations of PFOS. These samples were collected for routine monitoring and not tied to any particular investigation.
Rogue Watershed:
The figure below is a comparison of brown trout PFOS concentrations (95 % UCL) in the Rogue River. The highest concentrations were found in fish from the pond above the dam in Rockford.
Thornapple watershed:
Thornapple River: PFOS was detected in bass and Lepomis species collected from the Cascade Impoundment of the Thornapple River
Carter/Leach Lakes: There was concern over a landfill in Hastings that could be impacting Carter and Leach lakes. Bluegill from both lakes had non-detectable concentrations of PFOS. PFOS was detected in the bass from Leach Lake
Jordan Lake: Surface water foam was reported on Jordan Lake in 2019. Bass from Jordan Lake had detectable levels of PFOS concentrations