Columbia County, PA

ZIP 17820

In ZIP 17820, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Aqua Pa Roaring Creek Division meets every EPA legal limit; 9 contaminants are above health goals, led by chloroform at 93× California’s Public Health Goal.
• Nearest Superfund site: Mw Manufacturing, 1.7 miles away.
• Largest share of modeled toxic air from industry: Arxada LLC (67%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 26,310 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 17820

• Superfund sites nearbyC to D
• Factories and industrial sitesA
• Oil and gas wellsA to B
• Parks and nature nearbyA to C
• Air qualityB to C
• Drinking water qualityA to C
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to D
• Radiation signalsC to F

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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