Westwood, Massachusetts (ZIP 02090), carries a critical environmental hazard designation due to extensive industrial contamination throughout the surrounding region. The area is heavily impacted by thirty-one federally tracked facilities within ten miles, including eleven active sites within a strict five-mile radius such as Norwood PCBs, Zimble Drum Site, and Motive Parts. The primary regulatory focus is the Allis & Chalmers Electrical Manufacturing Facility (Former), located 4.4 miles away. This specific facility currently maintains an active remediation status on the EPA National Priorities List, indicating that federal cleanup operations and environmental monitoring are actively ongoing.

Historical operations at these industrial sites resulted in significant environmental releases of Polychlorinated Biphenyls (PCBs). PCBs are highly stable synthetic chemicals that persist in soil and water environments for decades without naturally degrading. Human exposure to PCBs occurs primarily through the ingestion of contaminated dust, soil, or local fish. This prolonged exposure is clinically linked to severe health impacts, including neurological deficits, immune system suppression, and elevated cancer risks.

Given this high concentration of active contamination, Westwood residents should immediately implement strict environmental safety protocols. Residents must install certified point-of-use water filtration systems rated specifically for persistent organic pollutants to protect drinking water. Individuals should entirely avoid consuming any locally caught fish from nearby waterways, as PCBs aggressively bioaccumulate in aquatic life. Furthermore, households engaging in residential gardening must test their soil for synthetic chemicals before planting edibles, or strictly utilize raised beds filled with imported, verified clean topsoil.