Berlin, New Hampshire, encompassing ZIP code 03570, carries a critical environmental hazard designation due to legacy industrial contamination. The immediate geographic area hosts two active Superfund properties within a five-mile radius. The most prominent environmental threat stems from the Chlor-Alkali Facility (Former), situated 2.65 miles from the local center, alongside the Lavoie Property located 2.31 miles away. Both sites maintain active status on the EPA National Priorities List, meaning federal regulators are currently conducting long-term remedial investigations and active cleanup operations. Environmental assessments for these properties indicate the presence of unspecified hazardous substances. In legacy industrial areas, this classification typically indicates volatile organic compounds, heavy metals, and residual chemical solvents. Exposure to these unmitigated industrial pollutants occurs primarily through groundwater migration, soil dust inhalation, and soil vapor intrusion. Long-term human contact with these substances can precipitate chronic respiratory conditions, neurological impairment, and elevated systemic health risks.

Given the active regulatory status of local remediation efforts and the proximity of these chemical plumes, residents must implement immediate safety protocols. Households dependent on private wells should commission annual comprehensive water testing for industrial solvents and heavy metals through a state-certified analytical laboratory. Individuals cultivating local gardens must utilize raised beds filled strictly with imported, commercially verified soil to eliminate direct contact with potentially compromised native earth. Furthermore, residents occupying homes with subsurface basements should install certified vapor barrier systems and ensure continuous structural ventilation to block potential chemical vapor intrusion from contaminated groundwater pathways.