Winnebago County, IL

ZIP 61107

In ZIP 61107, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rockford meets every EPA legal limit; 11 contaminants are above health goals, led by pfos at 1.1× California’s Public Health Goal.
• Nearest Superfund site: Interstate Pollution Control, Inc., 1.9 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Arnold Magnetic Technologies - Arnold Engineering (32%), mostly chromium.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 190,217 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 61107

• Superfund sites nearbyD to F
• Factories and industrial sitesD to F
• Oil and gas wellsA to C
• Parks and nature nearbyB to C
• Air qualityA to D
• Drinking water qualityC
• Pesticide useC to F
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsF

Based on 13 census tracts · compiled October 25, 2026 · how each grade works and its sources

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