Fairfax County, VA

ZIP 22309

In ZIP 22309, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Fairfax County Water Authority has 2 contaminants at or over an EPA legal limit; 12 contaminants are above health goals, led by pfos at 5.2× California’s Public Health Goal.
• Closer to Superfund sites than 54% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Waldorf Plant (21%), mostly lead.
• Fine particles (PM2.5) average 8.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,774 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 22309

• Superfund sites nearbyA to C
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityC to D
• Drinking water qualityF
• Pesticide useB to C
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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