Union, New Hampshire, zip code 03887, currently carries a critical environmental hazard designation due to its proximity to multiple active contamination zones. The primary concern is Miltonia Management Inc. (Greene Tannery), an active Superfund site located approximately four miles from the residential center. Within a ten-mile radius, three additional active sites compound local environmental risks: Cardinal Landfill, Collins and Aikman Plant, and Merrymeeting Road Drum Site.

The Environmental Protection Agency registers the contaminants at the Miltonia Management Inc. (Greene Tannery) facility as unspecified hazardous substances. Prolonged exposure to such legacy industrial chemicals frequently correlates with elevated risks of respiratory distress, neurological impairment, and chronic systemic illnesses, depending on exposure pathways like groundwater ingestion or vapor inhalation. Because this facility maintains an active National Priorities List status, it is currently undergoing formal EPA intervention. This designation indicates that federal authorities are actively executing environmental assessments, deploying containment strategies, or conducting physical remediation efforts to halt further soil and groundwater migration.

Given the concentration of active industrial contamination sites nearby, residents must implement immediate environmental safety protocols. Individuals utilizing private wells should test their water supply biannually for volatile organic compounds and heavy metals to ensure industrial groundwater plumes have not breached residential aquifers. Households should also install certified high-efficiency particulate air filtration systems to mitigate potential airborne dust carrying migrated soil contaminants. Furthermore, residents should consult municipal health bulletins frequently to monitor ongoing EPA remediation progress and report any unusual water turbidity directly to state environmental authorities.