Cook County, IL

ZIP 60043

In ZIP 60043, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Winnetka meets every EPA legal limit; 13 contaminants are above health goals, led by pfos at 2.1× California’s Public Health Goal.
• Closer to Superfund sites than 60% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: W R Grace & Co (58%), mostly cobalt compounds.
• Fine particles (PM2.5) average 8.2 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 60043

• Superfund sites nearbyC to D
• Factories and industrial sitesD
• Oil and gas wellsB
• Parks and nature nearbyD to F
• Air qualityD
• Drinking water qualityD to F
• Pesticide useB
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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