Allegany County, MD

ZIP 21502

In ZIP 21502, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Frankfort Psd meets every EPA legal limit; 9 contaminants are above health goals, led by pfos at 1.5× California’s Public Health Goal.
• Nearest Superfund site: Allegany Ballistics Laboratory (usnavy), 2.0 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Aes Warrior Run Inc (99%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 16,147 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21502

• Superfund sites nearbyD to F
• Factories and industrial sitesB to F
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityB to C
• Drinking water qualityA to C
• Pesticide useC to D
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsD to F
• Noise levelsA to D
• Radiation signalsF

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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