Mifflin County, PA

ZIP 17051

In ZIP 17051, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mt Union Municipal Auth meets every EPA legal limit; 10 contaminants are above health goals, led by bromodichloromethane at 4,239× California’s Public Health Goal.
• Nearest Superfund site: Jacks Creek/sitkin Smelting & Refining, Inc., 8.0 miles away.
• Largest share of modeled toxic air from industry: Standard Steel LLC (99%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 49,365 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 17051

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

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

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