Middlesex County, MA

ZIP 02458

In ZIP 02458, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Watertown Department Of Public Works meets every EPA legal limit.
• Nearest Superfund site: Materials Technology Laboratory (usarmy), 1.6 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tecomet (33%), mostly cobalt.
• Fine particles (PM2.5) average 7.3 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 02458

• Superfund sites nearbyA
• Factories and industrial sitesF
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB to C
• Drinking water qualityA
• Pesticide useA to B
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsB

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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