Will County, IL

ZIP 60423

In ZIP 60423, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Aqua Illinois-University Park meets every EPA legal limit; 12 contaminants are above health goals, led by lead at 279× California’s Public Health Goal.
• Nearest Superfund site: Joliet Army Ammunition Plant (load-Assembly-Packing Area), 8.3 miles away.
• Largest share of modeled toxic air from industry: South Holland Metal Finishing (92%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 248,146 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 60423

• Superfund sites nearbyA to D
• Factories and industrial sitesC to F
• Oil and gas wellsA to B
• Parks and nature nearbyD to F
• Air qualityB to F
• Drinking water qualityD to F
• Pesticide useC to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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