Chemicals found in tap water linked to a 33% rise in cancer rates

Chemicals found in tap water linked to a 33% rise in cancer rates
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A new analysis from the University of Southern California (USC), published in Earth.com, has linked the presence of polyfluoroalkyl substances (PFAS), also known as “forever chemicals,” in public drinking water to a 33% increase in cancer rates in certain U.S. counties. The study, an ecological analysis, correlated county-level cancer data with federal water-testing results, while accounting for other factors.

The researchers found a higher incidence of several types of cancer in counties with detected PFAS, including cancers of the digestive system, thyroid, respiratory system, and some head-and-neck cancers. The analysis also noted specific differences in cancer associations between men and women. The article explains that the observed links are biologically plausible, as certain PFAS chemicals can interfere with hormone signaling and promote chronic inflammation.

While the study provides national, population-level estimates and not proof for individual cases, it highlights a need for stricter regulations and better treatment for public water systems. To mitigate personal risk, the article advises checking local water quality reports and considering the use of certified at-home filters.