Cook County, IL
ZIP 60091
In ZIP 60091, 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 62% 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 (49%), 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 60091
- Superfund sites nearbyC to D
- Factories and industrial sitesD
- Oil and gas wellsB
- Parks and nature nearbyD to F
- Air qualityC to D
- Drinking water qualityD to F
- Pesticide useB to C
- Neighborhood health statusA to B
- Past wildfire impactsA
- Past flood impactsA
- Noise levelsA to D
Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources
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