The Naval Underwater Systems Center, identified by EPA ID 110008305404, remains an active site on the National Priorities List. Environmental assessments at such military-industrial locations often involve heavy metals or volatile organic compounds that migrate through subterranean pathways. Exposure pathways for South Lyme residents include the ingestion of contaminated well water, inhalation of vaporized chemicals, or direct contact with impacted soil during outdoor activities. Long-term exposure to these hazardous substances can lead to chronic health issues, including respiratory distress and increased cancer risks. To mitigate these dangers, residents should implement three specific defensive measures. First, install high-grade carbon filtration systems on all private well water inlets to capture migrating chemicals. Second, maintain a heavy mulch layer or permanent ground cover in yards to prevent the inhalation of toxic dust particles. Third, remove shoes before entering the home to stop the tracking of outdoor contaminants into living spaces. Continuous monitoring of EPA updates is necessary as the remediation process evolves. There are eleven hazardous sites within a ten-mile radius, indicating a complex regional profile of legacy pollution that requires vigilant personal safety protocols and regular environmental testing.