Kootenai County, ID

ZIP 83858

In ZIP 83858, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Upper Twin Lakes Water Company Inc has 1 contaminant at or over an EPA legal limit; 1 contaminant is above health goals, led by arsenic at 61,125× California’s Public Health Goal.
• Nearest Superfund site: Arrcom (drexler Enterprises), 5.2 miles away.
• Largest share of modeled toxic air from industry: Spokane Industries (61%), mostly chromium.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 106,320 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83858

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…