Frederick County, MD

ZIP 21703

In ZIP 21703, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Gilberts Mobile Home Park has 2 contaminants at or over an EPA legal limit; 6 contaminants are above health goals, led by pfos at 33× California’s Public Health Goal.
• Nearest Superfund site: Fort Detrick Area B Ground Water, 1.7 miles away.
• Largest share of modeled toxic air from industry: Holcim(Us) Inc. (61%), mostly chromium.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 196,170 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 21703

• Superfund sites nearbyC to F
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB to D
• Drinking water qualityA to F
• Pesticide useC to F
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to C
• Radiation signalsB to F

Based on 13 census tracts · compiled October 25, 2026 · how each grade works and its sources

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