Lincoln County, MT

ZIP 59923

In ZIP 59923, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Libby City Of meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 132× California’s Public Health Goal.
• Closer to Superfund sites than 98% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Idaho Forest Group -- Moyie Springs (100%), mostly lead compounds.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,492 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 59923

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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