Chester County, PA

ZIP 19374

In ZIP 19374, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Borough Of Avondale has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 2.2× California’s Public Health Goal.
• Nearest Superfund site: Hockessin Groundwater, 3.4 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Goodhart Sons Inc. (79%), mostly chromium.
• Fine particles (PM2.5) average 6.9 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 19374

• Superfund sites nearbyD
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityB
• Drinking water qualityC to D
• Pesticide useD
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsF

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…