Delaware County, PA

ZIP 19078

In ZIP 19078, 7 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; 25 contaminants are above health goals, led by lead at 88× California’s Public Health Goal.
• Nearest Superfund site: Austin Avenue Radiation Site, 4.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Monroe Energy Llc-Trainer Refinery (25%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.2 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 19078

• Superfund sites nearbyF
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityD
• Drinking water qualityF
• Pesticide useB
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsD
• Radiation signalsC

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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