As of the week of May 10, 2018:
637 private wells have been tested for PFOA/PFOS
617 results are in
397 are non-detects
205 PFOA & PFOS detected (0.56 - 15.6 ppt)
15 samples above MDEQ criteria - PFOA+PFOS 70 ppt
220 samples - Concentrations range between Non-Detect and 694.2 PPT
The Camp Grayling environmental staff regularly monitor a number of environmental factors at the camp and airfield to ensure safety, compliance with state and federal regulations, and to proactively detect and remedy potential problems. The most recent proactive measure was to test water samples for PFAS. A few of the samples detected PFOS/PFOA at levels above EPA lifetime health advisory. The Michigan Department of Military and Veterans Affairs, along with state and local environmental experts and officials, want to share PFAS investigation status in the area and information about this family of chemicals in general with members of the Grayling community and any other concerned citizens.
As the Grayling water investigation continues to evolve, it is priority one that you are frequently updated as new information is received. Recently, the MDEQ tested lake foam, lake water, a hand pump, and a residential well on Lake Margrethe for PFOS/PFOA. The results found elevated levels of PFOA in some of the lake foam samples, and trace amounts of other PFAS in lake water samples and the private well.
While most shoreline foam is naturally occurring and typically has a brown tint, the foam tested on Lake Margrethe was bright white and sudsy, prompting testing by MDEQ. They are diligently working to determine a source for the PFAS and potential impact to residents.
Skin contact with the foam is not considered harmful. As a precaution, District Health Department #10 recommends that swallowing foam or lake water be avoided. Additionally, the Michigan Department of Health and Human Services has issued Eat Safe Fish guidelines for fish caught from Lake Margrethe and the Au Sable River upstream of the Mio Dam as they relate to PFOS, mercury, and more. Detail about those guidelines can be found at www.michigan.gov/documents/mdhhs/Lake_Margrethe_Au_Sable_620823_7.pdf.
MDEQ will be testing residential well water around Lake Margrethe and ask that residents please fill out an information card at District Health Department #10 or at www.michigan.gov/campgrayling. You will be contacted by MDEQ or their contractor, AECOM, to schedule a water sample collection date. If you are wintering in another state and have closed up your residence, please complete the information card when you return in the spring to be tested then.
For assistance, please email the Environmental Assistance Center or call 800-662-9278.
If you live in the designated area for free water testing, please fill out and send this email form.
Many residents have inquired about which whole house filters are certified to remove PFOS/PFOA. At this time, the DEQ is not aware of any whole house filters currently on the market that are certified to remove PFOS/PFOA by the NSF International.