Hyannis implements filtration system to address PFAS contamination threat

Barnstable County officials are taking significant steps to address the contamination of drinking water in Hyannis due to PFAS (per- and polyfluoroalkyl substances) from a former fire training facility. During a recent meeting on May 30, 2025, county representatives outlined their ongoing efforts to mitigate the risks posed by these harmful substances.

The meeting highlighted the discovery of a PFAS plume migrating towards Mary Dunn Pond and local drinking water wells. In response, the county has implemented a wellhead treatment system, which includes filtration systems designed to remove PFAS from the water before it reaches residents. This immediate action has successfully improved water quality, ensuring that residents now have access to safe drinking water.

To further protect the community, officials are focusing on reducing the contaminants migrating towards the drinking water wells. The goal is to contain the plume and minimize the need for extensive filtration, thereby safeguarding the water supply more effectively. The geological assessment of the site indicates that the presence of clay-rich material acts as a barrier, limiting the downward migration of contaminants. This natural feature is advantageous in controlling the spread of PFAS.

The meeting also addressed the identification of a "hot spot" in the southeastern corner of the site, where the highest concentrations of PFAS were found due to past fire training activities. Plans for pilot testing in this area are underway, aiming to prevent further contamination from reaching the drinking water sources.

As Barnstable County continues its remediation efforts, the community can expect ongoing updates and improvements in water safety. The proactive measures taken by local officials reflect a commitment to public health and environmental protection, ensuring that residents can trust the quality of their drinking water.