Frederick County, MD

ZIP 21717

In ZIP 21717, 4 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; 13 contaminants are above health goals, led by bromodichloromethane at 95× California’s Public Health Goal.
• Nearest Superfund site: Fort Detrick Area B Ground Water, 9.2 miles away.
• Largest share of modeled toxic air from industry: Holcim(Us) Inc. (49%), 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 21717

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityB
• Drinking water qualityD
• Pesticide useF
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsD

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

Loading the full report, with every source…