Allegany County, MD

ZIP 21766

In ZIP 21766, 5 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 lead at 14× California’s Public Health Goal.
• Closer to Superfund sites than 57% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Aes Warrior Run Inc (87%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.0 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 21766

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsC
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsF
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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