Cass County, MN

ZIP 56633

In ZIP 56633, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Northside meets every EPA legal limit; 3 contaminants are above health goals, led by lead at 880× California’s Public Health Goal.
• Closer to Superfund sites than 93% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Potlatchdeltic Land & Lumber LLC - Bemidji Lumbermill (60%), mostly lead.
• Fine particles (PM2.5) average 6.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 42,791 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 56633

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

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

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