Jefferson County, ID

ZIP 83444

In ZIP 83444, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Roberts City Of meets every EPA legal limit; 1 contaminant is above health goals, led by arsenic at 1,408× California’s Public Health Goal.
• Closer to Superfund sites than 73% 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 (84%), mostly 1,2,4-trimethylbenzene.
• Fine particles (PM2.5) average 5.7 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 83444

• Superfund sites nearbyC to D
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusC
• 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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