Lewis County, ID

ZIP 83543

In ZIP 83543, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Kamiah meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 75× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Clearwater Paper Corp-Ppd & Cpd Idaho (96%), mostly formaldehyde.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 69,007 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83543

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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