Frederick County, MD

ZIP 21790

In ZIP 21790, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: New Design - Frederick County meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 92× California’s Public Health Goal.
• Nearest Superfund site: Fort Detrick Area B Ground Water, 8.7 miles away.
• Largest share of modeled toxic air from industry: Holcim(Us) Inc. (47%), mostly chromium.
• Fine particles (PM2.5) average 7.0 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 21790

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsB
• 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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