Sussex County, DE

ZIP 19947

In ZIP 19947, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rehoboth Pump District (Tui) has 2 contaminants at or over an EPA legal limit; 17 contaminants are above health goals, led by pfos at 2.6× California’s Public Health Goal.
• Nearest Superfund site: Millsboro TCE, 3.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Trinity Sterile (84%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.1 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 19947

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

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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