Twin Falls County, ID

ZIP 83301

In ZIP 83301, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Twin Falls City Of meets every EPA legal limit; 15 contaminants are above health goals, led by vanadium at 1.5× 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: Lamb Weston Inc (38%), mostly hydrogen sulfide.
• Fine particles (PM2.5) average 7.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 594,537 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 83301

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

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

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