Fremont County, ID

ZIP 83421

In ZIP 83421, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Teton City Of meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 1,938× 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.
• Fine particles (PM2.5) average 5.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,177,607 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83421

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityD
• Pesticide useF
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsF

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

Loading the full report, with every source…