Chester County, PA

ZIP 19355

In ZIP 19355, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Valley Run Water System meets every EPA legal limit; 10 contaminants are above health goals, led by pfos at 2.3× California’s Public Health Goal.
• Nearest Superfund site: Paoli Rail Yard, 4.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Superior Tube Co Inc (21%), mostly 1-bromopropane.
• Fine particles (PM2.5) average 8.0 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 19355

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

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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