Waukesha County, WI

ZIP 53122

In ZIP 53122, 6 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; 18 contaminants are above health goals, led by lead at 12× California’s Public Health Goal.
• Nearest Superfund site: Waste Management of Wisconsin, Inc. (brookfield Sanitary Landfill), 3.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Milwaukee Precision Casting (20%), mostly chromium.
• Fine particles (PM2.5) average 8.0 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 53122

• Superfund sites nearbyF
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityC to D
• Drinking water qualityD
• Pesticide useC
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to F
• Radiation signalsC

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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