Middlesex County, MA

ZIP 01852

In ZIP 01852, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: East Chelmsford Water District has 2 contaminants at or over an EPA legal limit; 9 contaminants are above health goals, led by arsenic at 159× California’s Public Health Goal.
• Nearest Superfund site: Silresim Chemical Corp., 1.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tecomet (24%), mostly chromium.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 34,462 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 01852

• Superfund sites nearbyF
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityB
• Drinking water qualityC to F
• Pesticide useA to B
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

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