Nobles County, MN

ZIP 56117

In ZIP 56117, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Round Lake meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 246× 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 56117

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

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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