Washington County, MN

ZIP 55110

In ZIP 55110, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Indian Hills Development meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 125× California’s Public Health Goal.
• Nearest Superfund site: Oakdale Dump, 5.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Northern Iron & Machine (30%), mostly nickel.
• Fine particles (PM2.5) average 8.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 49,911 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 55110

• Superfund sites nearbyA to F
• Factories and industrial sitesB to D
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityC to F
• Drinking water qualityC
• Pesticide useA to D
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 18 census tracts · compiled October 25, 2026 · how each grade works and its sources

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