Strafford County, NH

ZIP 03867

In ZIP 03867, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Somersworth Water Works meets every EPA legal limit; 7 contaminants are above health goals, led by arsenic at 325× California’s Public Health Goal.
• Nearest Superfund site: Collins & Aikman Plant (former), 4.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Pratt & Whitney (93%), mostly cobalt.
• Fine particles (PM2.5) average 5.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 4,299 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03867

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

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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