Nobles County, MN

ZIP 56168

In ZIP 56168, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Worthington meets every EPA legal limit; 13 contaminants are above health goals, led by arsenic at 567× California’s Public Health Goal.
• Nearest Superfund site: Adrian Municipal Well Field, 7.4 miles away.
• Largest share of modeled toxic air from industry: Valero Hartley Plant (80%), mostly acrolein.
• Fine particles (PM2.5) average 6.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 322,522 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 56168

• Superfund sites nearbyA
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityA
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsA to C
• Noise levelsA
• Radiation signalsD to F

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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