By Abdullahi Lukman
A recent study from the University of Southern California found that the presence of PFAS — synthetic “forever chemicals” used in products like nonstick coatings and firefighting foams — in public drinking water is associated with up to a 33 percent higher risk of certain cancers across US counties.
These chemicals are persistent in the environment, accumulating in soil, water, wildlife, and humans.
Researchers analyzed county-level cancer rates alongside federal water monitoring data, controlling for factors like smoking and pollution.
They found elevated cancer incidences linked to PFAS, particularly digestive, thyroid, respiratory, and some head-and-neck cancers.
Men showed higher rates of kidney, bladder, and nervous system cancers, while women had increased thyroid and oral cavity cancers.
PFAS can disrupt hormone signaling, cause chronic inflammation, and affect gene regulation, which may explain these cancer associations.
While the study does not prove individual causation, the patterns raise serious public health concerns.
The findings come amid increasing regulatory efforts in the US to set stricter PFAS limits in drinking water and upgrade treatment systems.
Technologies such as activated carbon and reverse osmosis filters can reduce PFAS levels, but ongoing monitoring and enforcement are critical.
Experts urge communities to check local water reports and use certified filters if necessary.
Continued research and stronger policies are needed to reduce exposure and protect public health from these persistent contaminants.