SmogRank / World / United States / Utah / July 2025
Most polluted cities in Utah, United States, July 2025
21 cities in Utah, United States ranked by their average PM2.5 over the 31 days. Worst: Moab at 12.1 µg/m³, #779 of 2,832 cities in the world. Cleanest: Cedar Hills at 7.0. 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 Valley City 3%
- 2Moab 0%
- 3Millcreek 0%
- 4West Jordan 0%
- 5Spanish Fork 0%
- 6Orem 0%
- 6Roosevelt 0%
- 8Smithfield 0%
- 9Price 0%
- 10Bountiful 0%
- 10Heber City 0%
- 12Salt Lake City 0%
- 13Enoch 0%
- 14Vernal 0%
- 15Brigham City 0%
- 15Herriman 0%
- 17Hurricane 0%
- 17Magna 0%
- 19Stansbury park 0%
- 20North Ogden 0%
- 21Cedar Hills 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
All cities in the world, July 2025 · All cities in United States, July 2025 · Utah now
Use this board
SmogRank, most polluted cities in Utah, United States, PM2.5, July 2025, smogrank.com/us/region/utah/history/2025-07 (accessed 7 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.