Middlesex County, MA

ZIP 02493

In ZIP 02493, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wellesley Water Division has 2 contaminants at or over an EPA legal limit; 15 contaminants are above health goals, led by pfos at 7.5× California’s Public Health Goal.
• Nearest Superfund site: Natick Laboratory Army Research, Development, and Engineering Center, 5.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tecomet (28%), mostly cobalt.
• Fine particles (PM2.5) average 6.4 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 02493

• Superfund sites nearbyD
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityA to F
• Pesticide useD
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC to D

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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