Chester County, PA

ZIP 19333

In ZIP 19333, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Aqua Pa Main System has 2 contaminants at or over an EPA legal limit; 25 contaminants are above health goals, led by lead at 88× California’s Public Health Goal.
• Nearest Superfund site: Paoli Rail Yard, 2.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Superior Tube Co Inc (31%), mostly 1-bromopropane.
• Fine particles (PM2.5) average 8.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 156,614 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 19333

• Superfund sites nearbyF
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityC to D
• Drinking water qualityF
• Pesticide useD to F
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to B
• Radiation signalsD

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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