New Castle County, DE

ZIP 19720

In ZIP 19720, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Municipal Services Commission has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 14× 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 (94%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.8 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 19720

• Superfund sites nearbyF
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityB to F
• Drinking water qualityC to F
• Pesticide useB to D
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsA to C

Based on 20 census tracts · compiled October 25, 2026 · how each grade works and its sources

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