Belknap County, NH

ZIP 03218

In ZIP 03218, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Locke Lake meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 1,261× California’s Public Health Goal.
• Closer to Superfund sites than 56% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Pratt & Whitney (61%), mostly chromium.
• Fine particles (PM2.5) average 5.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,693 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03218

• Superfund sites nearbyC
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityD
• Pesticide useC
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…