New Castle County, DE

ZIP 19803

In ZIP 19803, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Veolia Water Bethel has 1 contaminant at or over an EPA legal limit; 12 contaminants are above health goals, led by lead at 27× California’s Public Health Goal.
• Nearest Superfund site: Nl Industries, 4.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Croda Inc (56%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.0 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 19803

• Superfund sites nearbyC to F
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityB to D
• Drinking water qualityF
• Pesticide useC to F
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsB to C

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

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