New Castle County, DE
ZIP 19707
In ZIP 19707, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: Chester Water Authority meets every EPA legal limit; 12 contaminants are above health goals, led by lead at 48× California’s Public Health Goal.
- Nearest Superfund site: Hockessin Groundwater, 2.7 miles away (3 within 10 miles).
- Largest share of modeled toxic air from industry: Croda Inc (51%), mostly ethylene oxide.
- Fine particles (PM2.5) average 7.7 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 19707
- Superfund sites nearbyF
- Factories and industrial sitesB to D
- Oil and gas wellsA
- Parks and nature nearbyC to D
- Air qualityB to C
- Drinking water qualityD to F
- Pesticide useC to F
- Neighborhood health statusB to C
- Past wildfire impactsA
- Past flood impactsC
- Noise levelsA
- Radiation signalsC to D
Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources
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