Boundary County, ID

ZIP 83805

In ZIP 83805, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Curley Creek Water Assn has 1 contaminant at or over an EPA legal limit; 4 contaminants are above health goals, led by arsenic at 6,212× 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: Idaho Forest Group -- Moyie Springs (99%), mostly lead compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 20,918 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83805

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

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

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