Hillsborough, NH

ZIP 03101

In ZIP 03101, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Manchester Water Works has 1 contaminant at or over an EPA legal limit; 6 contaminants are above health goals, led by pfoa at 643× California’s Public Health Goal.
• Nearest Superfund site: Auburn Road Landfill, 6.2 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 6.7 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 03101

• Superfund sites nearbyA to D
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA to B
• Drinking water qualityF
• Pesticide useB
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsC to D
• Radiation signalsF

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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