Grayling Area PFAS Response

  • Grayling Army Airfield (GAAF), Crawford County

    Camp Grayling - Range 30

    Camp Grayling Map for PA ReportGroundwater samples were recently collected from 12 monitoring wells at MATES/Range 30.  One of those 12 groundwater samples collected at the MATES facility contained a combined concentration of PFOA + PFOS greater than 70 ppt.  In an effort to exercise an abundance of caution, we have identified a new area around MATES from which we would like to collect groundwater samples at residences located within that area.  The Michigan Department of Military Affairs (DMVA) is currently requesting the permission of residents in this immediate area to collect a sample from their drinking water well.  Written permission to sample drinking water must be received and processed before the sample can be collected. Sampling is scheduled to begin the first week of November. We expect analytical results near the end of December. ‚Äč

    Residents who live in this area are encouraged to contact Patti Lyman, Michigan Department of Military and Veterans Affairs, at 517-275-0804 ASAP to schedule a time when we can obtain your written permission and collect the groundwater sample.

    Final Preliminary Assessment Report - Camp Grayling, Michigan
    Perfluorooctane-Sulfonic Acid (PFOS) and Perfluorooctanoic Acid (PFOA) Impacted Sites -

  • Grayling PFOA PFOS Sampling Locations MapAs of the week of September 13, 2018:

    666 private wells have been tested for PFOA/PFOS
    665 results are in
    435 are non-detects
    214 PFOA & PFOS detected (0.56 - 15.6 ppt)
    16 samples above MDEQ criteria - PFOA+PFOS 70 ppt
    230 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.


  • Lake Margrethe Area, Crawford County

    Lake Margrethe PFOA PFOS Sampling Location MapAs of the week of September 13, 2018

    438 private wells have been tested for PFOA/PFOS
    422 results are in
    362 are non-detects
    58 PFOA & PFOS detected (1.2 - 68 ppt)
    2 samples above MDEQ criteria - PFOA+PFOS 70 ppt
    60 samples - Concentrations range between Non-Detect and 75.4 PPT

    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

    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  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.



Grayling Area Investigation Locations

  • Grayling Army Airfield (GAAF)
    • The MDEQ learned about the Grayling area PFAS site in May 2017 when the DMVA notified the MDEQ that groundwater samples on the Grayling Army Airfield tested positive for PFOA/PFOS.
    • The area is just outside the northern boundary of Grayling and is surrounded by residential and commercial properties.
    • Residential well sampling began in June 2017. Private well sampling continues as requests come in.
    • Two wells were sampled at the Timberly Village Mobile Home Community in June 2017, and low levels of PFAS were detected.
      • Follow-up samples were collected in August 2017 and results of thesesamples confirmed the initial sample results.
      • Notification to the approximately 60 residents in 25 mobile homes was provided by the owner.
    • Filters have been provided to approximately 175 homes in the area, and ongoing discussions are needed to determine if filters should be provided to additional homes until a long-term solution is identified.
    • 43 environmental borings were performed in the fall/winter of 2017/2018. Results are being reviewed and a work plan is being developed to install permanent monitoring wells based upon that data.Monitoring well installations will hopefully begin in late June or early July 2018.
    • A meeting to update local officials is scheduled for May 29, 2018.
    • A Public Meeting is tentatively scheduled for June 5, 2018.
  • Lake Margrethe
    • The area is residential and recreational, with the Camp Grayling Joint Maneuvering Training Center on the south end of the lake.A state forest campground is on the west side of the lake.
    • The DEQ received a picture and video of foam at Lake Margrethe in October 2017 from a part-time resident.
    • The DEQ responded by collecting four surface water samples, three foam samples, one residential well sample, and a hand pump well sample at the state forest campground. Foam sample results ranged from 2,341 ppt to 24,810 ppt total PFOS+PFOA.
    • The residential well sample was non-detect for PFOS plus PFOA, as was the sample form the hand pump well at the state forest campground.
    • One conference call has been held with local stakeholders.A public meeting was held on November 27, 2017.
    • A meeting to update local officials is scheduled for May 29, 2018.A Public Meeting is tentatively scheduled for June 5, 2018.
    • Filters have been provided to approximately 35 homes.

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Contact Information

  • 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.

    Residents please note:

    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.