Chester County, PA

ZIP 19343

In ZIP 19343, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wetherill Estates has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 3.9× California’s Public Health Goal.
• Nearest Superfund site: William Dick Lagoons, 4.6 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Goodhart Sons Inc. (42%), mostly chromium.
• Fine particles (PM2.5) average 7.8 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 19343

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

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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