Olmsted County, MN

ZIP 55901

In ZIP 55901, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hiawatha Estates, Subds. I, II & III meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 125× California’s Public Health Goal.
• Nearest Superfund site: Olmsted County Sanitary Landfill, 1.9 miles away.
• Largest share of modeled toxic air from industry: Crenlo Engineered Cabs LLC - Plant 2 (63%), mostly chromium.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 214,333 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 55901

• Superfund sites nearbyA
• Factories and industrial sitesA to F
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityB to D
• Drinking water qualityC
• Pesticide useD to F
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD to F

Based on 17 census tracts · compiled October 25, 2026 · how each grade works and its sources

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