Grayling Army Airfield, Grayling, Crawford County

Updated: September 11, 2019

PFAS Map Grayling Army AirfieldBackground

Grayling Army Airfield is a 923-acre area owned by the United States Army.

Recent Accomplishments

  • On September 9, 2019, AECOM collected six (6) residential well samples.
  • On August 14-15, 2019, AECOM collected six (6) residential well samples.
  • On August 30, 2019, a Restoration Advisory Board (RAB) Meeting was held on August 30.  The meeting focused primarily on developing RAB meeting operating procedures and other administrative topics.
  • On July 30-31, 2019, AECOM collected five (5) residential well samples. 

Next Steps

  • EGLE will continue to monitor new residential sampling requests and call residents to set up sampling dates and times.
  • Phase III of the remedial investigation is scheduled to begin on September 30, 2019. 

Residential Well Testing/Alternate Water Information

  • 315 households have been provided filters by District Health Department #10.
  • Seven households have been provided filters by District Health Department #10
  • All residential well testing reflected on this report has been conducted by EGLE.

Military Update

  • Representatives from Department of the Army and Camp Grayling met August 23 with congressional staff, state representatives, Michigan regulators and homeowners impacted by the release of PFOA and PFOA. The Army and Army National Guard will continue to explore more effective interim actions and remain committed to meeting with municipal leaders on a monthly basis, as well as keeping the community informed of the progress.  

Upcoming Community Engagement

  • The next Restoration Advisory Board (RAB) Meeting has not yet been scheduled. The meeting will be open to the public and this page will be updated when a schedule is received.  
Sampling: PFOS and PFOA Only

Type of Sample

Date Sampled

Number of Samples

Number of Results Received

Number of Non-detects

Number Between Non-detect and standard*

Number of > Standard

Drinking Water (Residential, Type I & II) Through
Sep 11, 2019
705 704 469 218 17


Sep 11, 2019
503 429 189 213 27
Cumulative   1,208 1,133 658 431 44

*Groundwater results are compared to the MDEQ Part 201 Criteria of 70 ppt PFOS+PFOA.
*Residential well results are compared to the USEPA Lifetime Health Advisory Level of 70 ppt PFOS+PFOA.

Sampling notes

  • Other PFAS analytes were detected in samples. There are no federal or state standards for these analytes.
  • All sample counts and activities reflect “off-base” sampling efforts only.
  • Sample results in the above table are from MDEQ and Michigan National Guard combined.


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 PFOA+PFOS at levels above the United States Environmental Protection Agency (USEPA) Lifetime Health Advisory (LHA) level.

As of the week of August 12, 2019:

699 private wells have been tested for PFOS+PFOA
694 results are in

  • 459 are non-detects
  • 218 PFOS+PFOA detected (0.56 - 15.6 ppt)
  • 17 samples above MDEQ criteria - 70 ppt PFOS+PFOA
  • PFOS+PFOA detected in 235 samples – Concentrations range from 0.56 – 694.2 ppt

Grayling Army Airfield PFAS Historical Timeline

Grayling Army Airfield is a 923-acre area owned by the United States Army. The area is just outside the northern boundary of Grayling and is surrounded by residential and commercial properties.

  • In May 2017, the MDMVA notified the MDEQ that groundwater samples on the Grayling Army Airfield tested positive for PFOA/PFOS.
  • In June 2017, the MDEQ began testing private residential wells due to the groundwater results from on-base at the Grayling Army Airfield. Private well sampling continues currently as requests come in. Filters have been provided to residents with detections of more than 70 ppt PFOS+PFOA, and ongoing discussions are needed to determine if filters should be provided to additional homes until a long-term solution is identified.
  • In June 2017, two wells were sampled at the Timberly Village Mobile Home Community. Results showed low levels of PFAS.
    • Follow-up samples were collected in August 2017 and results of these samples confirmed the initial sample results.
    • Notification to the approximately 60 residents in 25 mobile homes was provided by the owner.
  • Between Fall 2017 and Winter 2018, the MDEQ collected 43 environmental boring samples.
  • Beginning July 10, 2018, the MDEQ started monitoring well installations, with 73 monitoring wells installed at 20 locations. Currently, data is being evaluated and maps developed to assist in determining next steps. A Technical Report is due in March 2019.
  • On May 29, 2018, the MDEQ hosted a meeting to update local officials on the status of the investigation.
  • On December 11, 2018, the MDEQ hosted a Public Meeting for the community.
  • On December 20, 2018 AECOM collected six residential drinking water samples. Results are expected by January 18, 2019.
  • On February 6, 2019 AECOM collected one (1) residential drinking water sample. Results were received on February 21, 2019.
  • On February 8, 2019, AECOM completed the 2nd round of RI groundwater monitoring.
  • On March 12, 2019, AECOM collected three (3) residential drinking water samples. Results were received on April 3, 2019.
  • On June 5, 2019, there was a Restoration Advisory Board community meeting for the Grayling Area to learn about the RAB process, how a RAB functions, and the change to fill out a Community Member Interest Form. Applications were due by June 10 and the first RAB meeting will be announced this coming week.
  • On June 12, 2019, EGLE's contractor, AECOM, collected three residential drinking water samples. Results were received on July 11, 2019.
  • On June 25, 2019, the Army National Guard hosted an open public meeting from 7:30-8:30 pm at Kirtland Community College, 4800 W 4 Mile Rd, Grayling, to discuss plans to provide alternative drinking water to property owners with wells over 70 ppt of PFOA and PFOS.
  • On July 9, 2019, EGLE's contractor, AECOM, collected one residential drinking water sample. Results were received on August 1, 2019, and were non-detect.
  • On July 9, 2019, AECOM submitted the Remedial Investigation Report to EGLE.
  • On July 30-31, 2019, AECOM collected 5 residential well samples. Results are expected August 23, 2019.
  • On August 1, 2019, a Town Hall PFAS Informational Meeting was held at Kirtland Community College, 4800 W 4 Mile Rd, Grayling. An open house was from 4:30-6:00 pm, followed by a presentation of recent investigations from 6:00-7:30. 

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, EGLE is not aware of any whole house filters currently on the market that are certified to remove PFOS/PFOA by the NSF International.