SmogRank / World / United States / Utah / May 2023
Most polluted cities in Utah, United States, May 2023
18 cities in Utah, United States ranked by their average PM2.5 over the 31 days. Worst: Millcreek at 9.1 µg/m³, #596 of 1,543 cities in the world. Cleanest: Price at 5.3. 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.
- 1Millcreek 0%
- 2Moab 0%
- 3West Jordan 0%
- 4Spanish Fork 0%
- 5Bountiful 0%
- 6Salt Lake City 0%
- 7Orem 0%
- 8Roosevelt 0%
- 9Magna 0%
- 9Smithfield 0%
- 11Herriman 0%
- 11North Ogden 0%
- 13Enoch 0%
- 13Cedar Hills 0%
- 15Hurricane 0%
- 16Stansbury park 0%
- 16Vernal 0%
- 18Price 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, May 2023, smogrank.com/us/region/utah/history/2023-05 (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.