Sweetwater County, WY

ZIP 82943

In ZIP 82943, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: White Mountain W&s District meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 125× 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: Simplot Phosphates LLC (69%), mostly chlorine.
• Fine particles (PM2.5) average 4.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 12,125 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 82943

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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