What are the PFAS levels in tree swallows near U.S. military bases?

The study found that the total PFAS chemicals identified in tree swallows near the military sites were 40 times higher than those in other environments.

How do PFAS chemicals from military bases impact the environment?

The PFAS chemicals from the use of aqueous film-forming foam (AFFF) at military bases can leach into the surrounding soil and water, contaminating the environment and leading to bioaccumulation in wildlife like tree swallows.

What are the health risks of PFAS exposure for humans?

Experts warn that PFAS exposure has been linked to various health issues, including different types of cancer, high cholesterol, reduced immune system functions, low birth weight, liver damage, and thyroid disease.

Home / Environment / Tree Swallows Near U.S. Military Bases Carry Alarming Levels of Toxic 'Forever Chemicals'

Tree Swallows Near U.S. Military Bases Carry Alarming Levels of Toxic 'Forever Chemicals'

16 Oct, 2025

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Summary

Tree swallows near U.S. military bases have 40 times higher PFAS levels than other environments
PFAS chemicals can bioaccumulate up the food chain, impacting wildlife and humans
Experts warn of widespread PFAS contamination from military use of firefighting foam

Tree Swallows Near U.S. Military Bases Carry Alarming Levels of Toxic 'Forever Chemicals'

According to a study published in 2023, tree swallows living near U.S. military bases are carrying significantly higher levels of PFAS chemicals compared to those in other environments. PFAS, also known as 'forever chemicals', are a group of synthetic compounds that have been linked to a range of health issues, including cancer.