Norfolk County, MA

ZIP 02186

In ZIP 02186, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Randolph Water Department has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 11× California’s Public Health Goal.
• Nearest Superfund site: Baird & Mcguire, 3.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Depuy Synthes A Johnson & Johnson Co (33%), mostly cobalt.
• Fine particles (PM2.5) average 6.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 5,589 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 02186

• Superfund sites nearbyD to F
• Factories and industrial sitesD
• Oil and gas wellsB
• Parks and nature nearbyC to D
• Air qualityA
• Drinking water qualityA to F
• Pesticide useB to C
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsD
• Noise levelsA to D
• Radiation signalsC to D

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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