McHenry County, IL

ZIP 60021

In ZIP 60021, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Fox River Grove meets every EPA legal limit; 12 contaminants are above health goals, led by pfos at 1.1× California’s Public Health Goal.
• Nearest Superfund site: Wauconda Sand & Gravel, 4.7 miles away.
• Largest share of modeled toxic air from industry: Electri-Flex (22%), mostly chromium.
• Fine particles (PM2.5) average 7.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 211,541 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 60021

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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