Cook County, IL

ZIP 60430

In ZIP 60430, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Thornton meets every EPA legal limit; 6 contaminants are above health goals, led by bromodichloromethane at 136× California’s Public Health Goal.
• Nearest Superfund site: Estech General Chemical Company, 6.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: W R Grace & Co (42%), mostly cobalt compounds.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 16,702 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 60430

• Superfund sites nearbyA to D
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityF
• Drinking water qualityC
• Pesticide useA to B
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to F
• Radiation signalsD

Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources

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