Franklin, New Hampshire, within ZIP code 03235, carries a high environmental hazard designation due to its direct proximity to active industrial contamination zones. Although zero Superfund sites exist within a five-mile radius, three active sites currently operate within ten miles, including Old Pillsbury Mill, Merrimack River Tannery Waste, and Allied Leather. Allied Leather, located 7.4 miles from the Franklin center, is an active EPA National Priorities List facility currently undergoing regulatory assessment and remediation.

The EPA lists the primary contaminants at these specialized facilities as unspecified hazardous substances linked to historical tannery and milling operations. Environmental exposure to these legacy industrial chemicals typically occurs through groundwater migration, soil disruption, or vapor intrusion. Sustained physical contact with such hazardous substances poses serious long-term risks of neurological disruption, respiratory distress, and elevated cancer rates for surrounding populations, particularly if local aquifers become compromised. The active National Priorities List status indicates the EPA is presently managing the Allied Leather site by conducting remedial investigations to define the contamination plume and executing containment protocols to prevent further widespread ecological spread.

Given the high groundwater vulnerability associated with river-adjacent tannery waste, residents relying on private residential wells should immediately commission independent water testing for heavy metals and volatile organic compounds. Households should also proactively install certified reverse osmosis filtration systems to intercept potential municipal or private water supply contaminants. Furthermore, individuals cultivating home gardens should exclusively utilize raised beds constructed with imported, certified-clean soil to permanently mitigate surface-level soil exposure.