Nicollet County, MN

ZIP 56003

In ZIP 56003, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Saint Peter meets every EPA legal limit; 9 contaminants are above health goals, led by arsenic at 125× California’s Public Health Goal.
• Nearest Superfund site: Lehillier/mankato, 2.0 miles away.
• Largest share of modeled toxic air from industry: Tbei - Truck Bodies & Equipment International (Lake Crystal) (96%), mostly chromium.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 196,301 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 56003

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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