Allegany County, MD

ZIP 21555

In ZIP 21555, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Paw Paw Water Works meets every EPA legal limit; 12 contaminants are above health goals, led by arsenic at 250× California’s Public Health Goal.
• Nearest Superfund site: Limestone Road, 2.0 miles away.
• Largest share of modeled toxic air from industry: Aes Warrior Run Inc (99%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.1 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 21555

• Superfund sites nearbyC to F
• Factories and industrial sitesA to F
• Oil and gas wellsA to C
• Parks and nature nearbyB to C
• Air qualityB
• Drinking water qualityA to C
• Pesticide useD
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsF
• Noise levelsA
• Radiation signalsD to F

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

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