Jefferson County, ID

ZIP 83442

In ZIP 83442, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hillman Trailer Court meets every EPA legal limit; 1 contaminant is above health goals, led by arsenic at 250× 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: Frazier Industrial Co (92%), mostly 1,2,4-trimethylbenzene.
• Fine particles (PM2.5) average 5.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,124,031 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83442

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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