Rockingham County, NH

ZIP 03870

In ZIP 03870, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rye Water Dist has 2 contaminants at or over an EPA legal limit; 6 contaminants are above health goals, led by pfoa at 1,000× California’s Public Health Goal.
• Nearest Superfund site: Portsmouth Naval Shipyard, 3.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Pratt & Whitney (55%), mostly hydrazine.
• Fine particles (PM2.5) average 5.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 18,148 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 03870

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

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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