Montgomery County, MD

ZIP 20854

In ZIP 20854, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Loudoun Water - Central System meets every EPA legal limit; 11 contaminants are above health goals, led by pfos at 1.4× California’s Public Health Goal.
• Nearest Superfund site: Hidden Lane Landfill, 8.5 miles away.
• Largest share of modeled toxic air from industry: Elite Spice Inc. (60%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 70,837 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 20854

• Superfund sites nearbyA to C
• Factories and industrial sitesB to D
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityB to D
• Drinking water qualityC
• Pesticide useB to D
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsB to C
• Noise levelsA to D
• Radiation signalsD to F

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

Loading the full report, with every source…