Waukesha County, WI

ZIP 53146

In ZIP 53146, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Muskego Water Utility meets every EPA legal limit; 12 contaminants are above health goals, led by lead at 15× 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: Metaltek International-Wisco Nsin Centrifugal Div (50%), mostly chromium.
• Fine particles (PM2.5) average 7.3 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 53146

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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