Waukesha County, WI

ZIP 53186

In ZIP 53186, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Brookfield Water Utility has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by pfos at 1.2× California’s Public Health Goal.
• Nearest Superfund site: Waste Management of Wisconsin, Inc. (brookfield Sanitary Landfill), 2.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Northern Stainless Corp (72%), mostly chromium.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 69,527 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 53186

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

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…