Delaware County, PA

ZIP 19023

In ZIP 19023, 6 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; 18 contaminants are above health goals, led by pfoa at 943× California’s Public Health Goal.
• Nearest Superfund site: Austin Avenue Radiation Site, 1.6 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Croda Inc (21%), mostly 1-bromopropane.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,072 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 19023

• Superfund sites nearbyF
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityD
• Drinking water qualityD to F
• Pesticide useA
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsB to D
• Radiation signalsB to C

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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