Loudoun County, VA

ZIP 20141

In ZIP 20141, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Foxcroft School has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by pfoa at 186× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Trex - Virginia Manufacturing Operations (71%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.8 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 20141

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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