Marstons Mills, Massachusetts, carries a high environmental hazard designation due to regional industrial contamination. While there are zero sites within a five-mile radius, three active environmental hazard sites operate within ten miles, including Cape Cod Septic Services Inc, the Barnstable Landfill, and the Barnstable County Fire Training Academy. The EPA identifies the primary contaminants at the Barnstable County Fire Training Academy as unspecified hazardous substances. In the context of fire training facilities, such substances typically include chemical firefighting foams, volatile organic compounds, and heavy metals. Prolonged exposure to these chemicals, primarily occurring through groundwater migration into municipal and private aquifers, can affect residents by disrupting endocrine systems, reducing immune function, and increasing the risk of certain cancers.

The Barnstable County Fire Training Academy remains in an active National Priorities List regulatory stage, representing a significant federal intervention. This active status indicates that the EPA is currently evaluating, investigating, or implementing long-term remediation efforts to mitigate soil and aquifer contamination. Because local contaminants frequently migrate into residential drinking water supplies, Marstons Mills residents relying on private wells should commission independent laboratory testing for persistent industrial chemicals and volatile organic compounds annually. Furthermore, households must install certified reverse osmosis or activated carbon filtration systems on all primary drinking water taps to neutralize chemical exposure risks. Finally, individuals should consult municipal water quality reports published by the local public works department to monitor seasonal fluctuations in environmental pollutant levels before using municipal supplies for daily consumption and cooking.