Sullivan County, NH

ZIP 03751

In ZIP 03751, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Gray Ledges meets every EPA legal limit; 1 contaminant is above health goals, led by lead at 31× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Sturm Ruger & Co. Inc. (99%), mostly chromium.
• Fine particles (PM2.5) average 5.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 5,538 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03751

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to F
• Pesticide useC to D
• Neighborhood health statusC to D
• 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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