Sanders County, MT

ZIP 59845

In ZIP 59845, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wettington Water District Inc meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 1,175× California’s Public Health Goal.
• Closer to Superfund sites than 53% 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 (75%), mostly formaldehyde.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 128,954 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 59845

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

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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