New Castle County, DE

ZIP 19731

In ZIP 19731, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: East Ncc District has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by lead at 26× California’s Public Health Goal.
• Nearest Superfund site: Delaware City Pvc Plant, 6.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Croda Inc (81%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 97,688 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 19731

• Superfund sites nearbyD
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityD
• Pesticide useF
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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