A new study has found a significant link between exposure to “forever chemicals” (PFAS) and an increased risk of certain cancers in US communities. The research, based on data from 1,080 counties and approximately 156.1 million people, reveals that four types of cancer – digestive system, endocrine system, oropharyngeal, and respiratory system cancers – are more common in areas with high levels of PFAS contamination.
PFAS were first introduced in consumer products in the 1940s but have remained a persistent pollutant due to their thermal and chemical stability. The chemicals are present in raincoats, upholstery, food packaging, non-stick cookware, and fire-fighting foams, among other products. As these items break down, PFAS enter the environment and contaminate water sources, posing a risk to human health.
The study estimates that PFAS from drinking water may contribute to between 4,000 and 7,000 cases of cancer each year in the US. The researchers found that exposure to PFBS, a type of PFAS, was particularly linked to an increased incidence of mouth and throat cancers, with rates 33% higher in areas with high PFBS contamination.
While further research is needed to confirm these findings and establish a causal link between PFAS and cancer, the study’s authors argue that the existing evidence warrants more stringent regulation of PFAS. The researchers emphasize the need for closer monitoring of less-studied PFAS compounds and urge regulators to consider other unregulated PFAS substances.
The study’s findings provide a significant contribution to our understanding of the health risks associated with PFAS exposure, highlighting the importance of continued research into the mechanisms by which these chemicals cause harm.
Source: https://www.sciencealert.com/forever-chemicals-in-us-drinking-water-linked-to-cancer-scientists-find