SmogRank / World / United States / Utah / August 2026
Most polluted cities in Utah, United States, August 2026
21 cities in Utah, United States ranked by their average PM2.5 over the 31 days. Worst: Smithfield at 11.0 µg/m³, #687 of 2,866 cities in the world. Cleanest: Hurricane at 5.0. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1West Jordan 3%
- 2Price 3%
- 3Smithfield 0%
- 4Millcreek 0%
- 5Stansbury park 0%
- 6Brigham City 0%
- 7Spanish Fork 0%
- 8Bountiful 0%
- 9Moab 0%
- 9Salt Lake City 0%
- 9West Valley City 0%
- 12Herriman 0%
- 13Magna 0%
- 14Orem 0%
- 15Roosevelt 0%
- 16North Ogden 0%
- 17Cedar Hills 0%
- 17Vernal 0%
- 19Heber City 0%
- 20Enoch 0%
- 21Hurricane 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in Utah, United States, PM2.5, August 2026, smogrank.com/us/region/utah/history/2026-08 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.