New Castle County, DE

ZIP 19709

In ZIP 19709, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: South East Pump District meets every EPA legal limit; 5 contaminants are above health goals, led by lead at 19× California’s Public Health Goal.
• Nearest Superfund site: Sealand Limited, 1.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Croda Inc (79%), 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 19709

• Superfund sites nearbyA to F
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityA to B
• Drinking water qualityC to D
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to C
• Radiation signalsC

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

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