New Castle County, DE

ZIP 19701

In ZIP 19701, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wilmington Water Department has 1 contaminant at or over an EPA legal limit; 17 contaminants are above health goals, led by lead at 38× California’s Public Health Goal.
• Nearest Superfund site: Standard Chlorine of Delaware, Inc., 3.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Croda Inc (76%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.3 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 19701

• Superfund sites nearbyF
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityB to D
• Drinking water qualityD to F
• Pesticide useC to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsC to D

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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