Carroll County, NH

ZIP 03818

In ZIP 03818, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Near Ledge meets every EPA legal limit; 1 contaminant is above health goals, led by lead at 75× California’s Public Health Goal.
• Nearest Superfund site: Kearsarge Metallurgical Corp., 0.6 miles away.
• Largest share of modeled toxic air from industry: Gorham Sand & Gravel Pike Industries Inc (92%), mostly polycyclic aromatic compounds.
• Fine particles (PM2.5) average 5.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,412 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03818

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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