Henderson County, KY

ZIP 42420

In ZIP 42420, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Webster Co Water District meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 85× California’s Public Health Goal.
• Nearest Superfund site: Jacobsville Neighborhood Soil Contamination, 7.3 miles away.
• Largest share of modeled toxic air from industry: Kaiser Aluminum Warrick (98%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 192,930 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 42420

• Superfund sites nearbyA to D
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyB to D
• Air qualityC to D
• Drinking water qualityB to C
• Pesticide useD to F
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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