Armstrong County, PA

ZIP 15673

In ZIP 15673, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mawc Sweeney Plant meets every EPA legal limit; 8 contaminants are above health goals, led by pfos at 1.5× California’s Public Health Goal.
• Nearest Superfund site: Lindane Dump, 8.5 miles away.
• Largest share of modeled toxic air from industry: Ati Flat Rolled Products Holdings LLC (27%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 40,298 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 15673

• Superfund sites nearbyA
• Factories and industrial sitesB
• Oil and gas wellsF
• Parks and nature nearbyB
• Air qualityD
• Drinking water qualityC
• Pesticide useC
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsD
• Noise levelsA
• Radiation signalsF

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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