Cheshire County, NH

ZIP 03431

In ZIP 03431, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Keene Water Dept has 1 contaminant at or over an EPA legal limit; 15 contaminants are above health goals, led by lead at 31× California’s Public Health Goal.
• Nearest Superfund site: Troy Mills Landfill, 6.6 miles away.
• Largest share of modeled toxic air from industry: Bete Fog Nozzle Inc. (89%), mostly chromium.
• Fine particles (PM2.5) average 6.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 6,756 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03431

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityA
• Drinking water qualityD to F
• Pesticide useC to D
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsC to D

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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