Delaware County, PA

ZIP 19023

In ZIP 19023, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Philadelphia Water Department has 2 contaminants at or over an EPA legal limit; 17 contaminants are above health goals, led by lead at 44× 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 (22%), mostly ethylene oxide.
• 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 sitesD
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityD
• Drinking water qualityF
• Pesticide useB
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsB to D
• Radiation signalsC

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

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