Frederick County, MD

ZIP 21780

In ZIP 21780, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Highfield meets every EPA legal limit; 10 contaminants are above health goals, led by pfos at 2.7× California’s Public Health Goal.
• Nearest Superfund site: Central Chemical (hagerstown), 8.9 miles away.
• Largest share of modeled toxic air from industry: Holcim(Us) Inc. (54%), mostly chromium.
• Fine particles (PM2.5) average 7.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 144,043 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21780

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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