Sussex County, DE

ZIP 19956

In ZIP 19956, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Town Of Delmar meets every EPA legal limit; 11 contaminants are above health goals, led by pfos at 3.1× California’s Public Health Goal.
• Nearest Superfund site: Blades Groundwater, 4.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Trinity Sterile (88%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 538,410 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 19956

• Superfund sites nearbyC to F
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityA to B
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsB to C

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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