Loudoun County, VA

ZIP 20147

In ZIP 20147, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Loudoun Water - Central System has 1 contaminant at or over an EPA legal limit; 11 contaminants are above health goals, led by lead at 9.2× California’s Public Health Goal.
• Nearest Superfund site: Hidden Lane Landfill, 1.9 miles away.
• Largest share of modeled toxic air from industry: Menzies Aviation Fueling Operations Wash Dulles Internationa (55%), mostly chlorine.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 97,008 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 20147

• Superfund sites nearbyD to F
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityC to F
• Drinking water qualityD
• Pesticide useC to D
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to D
• Radiation signalsD

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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