Hillsborough, NH

ZIP 03031

In ZIP 03031, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Farley Rd Estates has 1 contaminant at or over an EPA legal limit; 7 contaminants are above health goals, led by arsenic at 3,054× California’s Public Health Goal.
• Nearest Superfund site: Fletcher's Paint Works & Storage, 3.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Proto Labs Inc (28%), mostly chromium.
• Fine particles (PM2.5) average 5.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 24,072 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03031

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…