Sullivan County, NH

ZIP 03773

In ZIP 03773, 6 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.
• Nearest Superfund site: Bfi Sanitary Landfill (rockingham), 5.8 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Sturm Ruger & Co. Inc. (95%), mostly chromium.
• Fine particles (PM2.5) average 5.9 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 03773

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…