Grayling Army Airfield, Grayling, Crawford County
Updated: May 1, 2019
Grayling Army Airfield is a 923-acre area owned by the United States Army.
- On March 12, 2019 AECOM collected three (3) residential drinking water sample. Results were received on April 3, 2019.
- The Michigan Department of Environment, Great Lakes, and Energy (EGLE) will continue evaluating Remedial Investigation data and developing final reports summarizing investigation activities.
- EGLE will continue to monitor new residential sampling requests, and call residents to set up sampling dates and times.
- AECOM is planning to collect residential well samples on May 7-8, 2019.
Residential Well Testing/Alternate Water Information (if applicable)
- 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.
- For additional information on residential well testing and results, visit the Frequently Asked Questions.
- EGLE has sampled all municipal water supplies for PFAS. View the results for the city of Grayling.
Upcoming Community Engagement
None scheduled at this time.
Sampling: PFOS and PFOA Only
Type of Sample
# of Samples
# of Results Received
# of Non-detects
# Between Non-detect and standard*
# > Standard
|Drinking Water (Residential, Type I & II)
Apr 25, 2019
|Through Apr 25, 2019
*Groundwater results are compared to EGLE 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.
- 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 EGLE 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).
As of the week of April 22. 2019:
687 private wells have been tested for PFOA/PFOS
687 results are in
- 455 are non-detects
- 215 PFOS+PFOA detected (0.56 - 15.6 ppt)
- 17 samples above EGLE criteria - PFOS+PFOA 70 ppt
PFOS+PFOA were detected in 232 samples – Concentrations range from 0.56 – 694.2
Final Preliminary Assessment Report - Camp Grayling, Michigan
Perfluorooctane-Sulfonic Acid (PFOS) and Perfluorooctanoic Acid (PFOA) Impacted Sites -
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 Michigan Department of Environment, Great Lakes, and Energy (EGLE) that groundwater samples on the Grayling Army Airfield tested positive for PFOA/PFOS.
- In June 2017, EGLE 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, EGLE collected 43 environmental boring samples.
- Beginning July 10, 2018, EGLE 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, EGLE hosted a meeting to update local officials on the status of the investigation.
- On December 11, 2018, EGLE hosted a Public Meeting for the community.
- On December 20, 2018 AECOM collected six residential drinking water samples. Results were received on January 17, 2019.
- On February 6, 2019 AECOM collected one (1) residential drinking water sample. Results were received on February 21, 2019.
- AECOM completed the 2nd round of RI groundwater monitoring on February 8, 2019.