The Allston, Massachusetts, zip code 02134, currently carries a critical environmental hazard designation due to a high concentration of nearby industrial contamination. The primary threat stems from unspecified hazardous substances associated with the Coal Tar Processing Facility (Former), located exactly four miles away. In historical coal tar operations, these substances typically include polycyclic aromatic hydrocarbons, volatile organic compounds, and heavy metals. Chronic exposure to these legacy contaminants through soil vapor intrusion or contaminated groundwater pathways can increase respiratory risks, neurological issues, and long-term carcinogenic vulnerability for local residents.

The Coal Tar Processing Facility (Former) maintains an active status on the Environmental Protection Agency National Priorities List. This indicates ongoing federal remediation efforts, meaning it requires continued monitoring, engineering controls, and active chemical extraction phases to mitigate off-site migration. The regional environmental burden is heavily compounded by fifteen total remediation sites within a five-mile radius of the zip code, including Conway Park and the Dudley Street Lead and Arsenic site.

Given this high density of active contamination zones, residents should implement immediate exposure mitigation strategies. First, households should install certified high-efficiency particulate air filtration systems to capture airborne particulate matter and potential volatile chemicals. Second, residents should utilize reverse osmosis water filters for all domestic drinking water to prevent the inadvertent residential ingestion of dissolved industrial heavy metals. Finally, property owners and tenants should commission independent soil and vapor intrusion tests for their specific residential footprints, particularly when inhabiting basement-level apartments or older residential structures that are prone to foundation degradation.