The 04243 ZIP code in Lewiston, Maine, currently holds a critical environmental hazard designation due to regional industrial contamination. Although there are zero facilities within a five-mile radius, the surrounding ten-mile perimeter contains six active environmental hazard sites. The nearest major EPA-regulated facility is Leeds Metal, located approximately eight miles from the center of this postal code. Additional nearby hazards include multiple Valetone Cleaners locations, Wasco Supreme, and the Maine National Guard Training Site. Leeds Metal remains an active National Priorities List site, meaning the Environmental Protection Agency is currently investigating, monitoring, or remediating the property under federal Superfund regulations to prevent off-site pollution. The primary threat from Leeds Metal involves a mixture of unspecified hazardous substances. Exposure to legacy industrial contaminants typically occurs through groundwater migration or airborne dust. Prolonged exposure to these types of unspecified industrial pollutants frequently compromises community health, potentially causing respiratory distress, endocrine disruption, neurological impairment, and elevated risks of chronic systemic diseases. Because groundwater plumes and wind currents can transport these materials beyond site boundaries, residents should adopt immediate defensive practices. Residents should install and properly maintain certified reverse osmosis water filtration systems to remove potential chemical compounds from daily drinking water supplies. Homeowners utilizing private well systems must commission independent laboratory water testing annually to detect industrial runoff or solvent intrusion. Finally, residents should properly seal basement foundation cracks and operate high-efficiency particulate air purifiers inside their homes to prevent the accumulation of migrating environmental dust.