Washington County, UT

ZIP 84779

In ZIP 84779, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hildale - Colorado City has 2 contaminants at or over an EPA legal limit; 13 contaminants are above health goals, led by pfos at 26× 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: St George Steel LLC (69%), mostly chromium.
• Fine particles (PM2.5) average 5.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 26,300 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84779

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityC to F
• Pesticide useD to F
• Neighborhood health statusD
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA to B
• Radiation signalsC to D

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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