Missoula County, MT

ZIP 59823

In ZIP 59823, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Milltown Community Pws System meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 40× California’s Public Health Goal.
• Closer to Superfund sites than 97% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Roseburg Forest Products Co. - Missoula Particleboard (66%), mostly formaldehyde.
• Fine particles (PM2.5) average 5.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 10,732 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 59823

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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