Loring Air Force Base (AFB), located in Limestone, Maine, has a notable history of environmental contamination, particularly concerning per- and polyfluoroalkyl substances (PFAS).
These hazardous substances, often referred to as “forever chemicals” due to their persistence in the environment, have been detected at concerning levels in the groundwater at the former military installation.
Loring AFB served as a strategic base during the Cold War, hosting the 42nd Bombardment Wing and later the 42nd Air Refueling Squadron.
The base was integral to the United States’ nuclear deterrence strategy, housing B-52 bombers and other support aircraft.
To manage the risks associated with aviation operations, the base extensively used Aqueous Film Forming Foam (AFFF), a firefighting agent effective in suppressing fuel-based fires.
AFFF contains high concentrations of PFAS compounds, which, over decades of use in training exercises and emergency responses, have leached into the soil and groundwater.
Investigations into the environmental impact of AFFF usage at Loring AFB have revealed significant PFAS contamination.
Testing conducted in 2018 detected various PFAS compounds in on-base groundwater, with perfluorooctane sulfonate (PFOS) levels reaching 8,770 parts per trillion (ppt) and perfluorooctanoic acid (PFOA) levels at 811 ppt.
The combined concentration of PFOS and PFOA was 8,936 ppt.
The contamination has not been confined to the base’s perimeter.
Studies have shown that PFAS compounds have migrated into nearby waterways, posing potential risks to aquatic ecosystems and communities relying on these water sources.
However, testing on 39 private drinking water wells in the surrounding areas of Limestone, Caswell, and Caribou since 2022 detected PFOS and PFOA levels below the EPA’s standard of 4 ppt, suggesting that, at least in these instances, drinking water supplies have not been significantly impacted.
Who May Have Been Exposed to PFAS Pollution at Loring Air Force Base?
Individuals who lived, worked, or served at Loring Air Force Base (AFB) may have been exposed to PFAS contamination through groundwater, soil, and possibly airborne particles.
Military personnel who handled Aqueous Film Forming Foam (AFFF) or were involved in firefighting operations faced direct exposure to high PFAS concentrations.
Nearby communities relying on groundwater sources could also have been affected as PFAS migrated beyond the base’s boundaries.
While recent testing suggests that private drinking wells have not exceeded federal PFAS limits, ongoing investigations continue to assess potential long-term risks.
Potentially Exposed Groups:
- Military personnel and base workers – Individuals stationed or employed at Loring AFB, especially those involved in firefighting, aircraft maintenance, or emergency response.
- Firefighters and first responders – Those who directly handled AFFF during training exercises or emergency fire suppression.
- Local residents – People living near the base who may have been exposed through groundwater contamination or environmental runoff.
- Families of military personnel – Dependents who lived in base housing and may have consumed or used contaminated water.
- Civilian contractors – Individuals who worked on environmental cleanup, infrastructure projects, or other services on the base.
- Farmers and agricultural workers – Those who may have used water sources near Loring AFB for irrigation or livestock.
Loring Air Force Base is Among Hundreds of Military Sites with Dangerous PFAS Contamination
Loring Air Force Base (AFB) is one of over 700 U.S. military installations identified as having known or suspected releases of per- and polyfluoroalkyl substances (PFAS), primarily due to the widespread use of Aqueous Film Forming Foam (AFFF).
The Department of Defense (DoD) has confirmed extensive PFAS contamination at bases across the country, affecting groundwater, drinking water supplies, and surrounding ecosystems.
These bases, like Loring AFB, used AFFF in routine firefighting training exercises and emergency response situations, unknowingly contributing to decades of environmental pollution.
Since PFAS are highly persistent in the environment, contamination remains a significant concern even at decommissioned bases where military operations ceased long ago.
Across the U.S., major military installations—including active bases, reserve facilities, and former sites—have reported PFAS levels far exceeding the Environmental Protection Agency’s (EPA) maximum contaminant limits.
Some of the worst contamination cases involve bases where AFFF was used frequently, such as Ellsworth AFB in South Dakota, KI Sawyer AFB in Michigan, and Barksdale AFB in Louisiana.
These sites, like Loring AFB, pose serious risks to both military personnel and civilians who may have been exposed through contaminated groundwater or soil.
Communities near these bases are now facing long-term health concerns, including increased risks of cancer, immune disorders, and other chronic conditions linked to PFAS exposure.
