Prince William County, VA

ZIP 20111

In ZIP 20111, 1 of the 12 things we check have at least one part graded D or F.

• Drinking water: Manassas Park, City Of meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 98× California’s Public Health Goal.
• Closer to Superfund sites than 59% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Micron Technology Inc. (88%), mostly chlorine.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 19,388 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 20111

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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