St. Clair County, IL

ZIP 62203

In ZIP 62203, 10 of the 12 things we check have at least one part graded D or F.

• Drinking water: Il American-East St Louis meets every EPA legal limit; 16 contaminants are above health goals, led by lead at 75× California’s Public Health Goal.
• Nearest Superfund site: Old American Zinc Plant, 6.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Wood River Refinery (21%), 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 324,443 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 62203

• Superfund sites nearbyF
• Factories and industrial sitesD to F
• Oil and gas wellsD
• Parks and nature nearbyD to F
• Air qualityD
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

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

Loading the full report, with every source…