Jefferson County, WI

ZIP 53538

In ZIP 53538, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Oak Ridge Mobile Com 4 has 1 contaminant at or over an EPA legal limit; 7 contaminants are above health goals, led by pfos at 4.4× California’s Public Health Goal.
• Nearest Superfund site: Janesville Old Landfill, 7.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Evonik Corp (94%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 274,069 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 53538

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

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

Loading the full report, with every source…