The Chatham, Massachusetts area under ZIP code 02633 currently holds a high environmental hazard designation due to its immediate proximity to active federal remediation zones. The primary concern is the Eastham Sanitary Landfill, an active Superfund site located 3.52 miles away from the community border. Within a ten-mile radius, the region contains two active cleanup sites, including the Septage Treatment Facility at Old Camp Wellfleet. Because the Eastham Sanitary Landfill retains an active National Priorities List status, the Environmental Protection Agency is actively executing ongoing containment and site assessment phases to prevent further pollution migration. Regulatory records indicate the presence of unspecified hazardous substances at this facility. While specific chemical profiles remain unclassified in broad data screenings, historical landfill contaminants typically include volatile organic compounds, migrating heavy metals, and toxic leachate. Environmental exposure to these substances primarily threatens local groundwater aquifers, potentially causing chronic respiratory distress, neurological impairment, and elevated cancer risks if ingested through contaminated drinking water.

To mitigate these environmental risks, residents must implement immediate safety protocols. Households utilizing private wells must commission comprehensive water testing through a state-certified laboratory annually to screen for migrating heavy metals and industrial solvents. Residents should also install certified reverse osmosis filtration systems at all primary residential drinking taps to neutralize potential ingestion hazards. Finally, local inhabitants must review annual municipal consumer confidence reports regarding public water quality and immediately report any abnormal tap water discoloration or distinct chemical odors directly to the Massachusetts Department of Public Health.