Clark County, IL

ZIP 62423

In ZIP 62423, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: West Terre Haute Water has 1 contaminant at or over an EPA legal limit; 7 contaminants are above health goals, led by pfos at 6.6× California’s Public Health Goal.
• Nearest Superfund site: Velsicol Chemical Corp. (marshall Plant), 7.2 miles away.
• Largest share of modeled toxic air from industry: Unison Engine Components Terre Haute (81%), mostly cobalt.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 374,476 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 62423

• Superfund sites nearbyC to D
• Factories and industrial sitesC to D
• Oil and gas wellsC to D
• Parks and nature nearbyC to D
• Air qualityC
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsC to F

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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