SmogRank / World / United States / Utah / January 2023
Most polluted cities in Utah, United States, January 2023
14 cities in Utah, United States ranked by their average PM2.5 over the 31 days. Worst: Roosevelt at 17.3 µg/m³, #196 of 1,225 cities in the world. Cleanest: Hurricane at 2.4. A city needs measurements on 70% of the days to be ranked.
OpenAQ's archive, where our readings come from, has almost none for 7 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.
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.
- 1Roosevelt 4%
- 2Vernal 0%
- 3Smithfield 0%
- 4West Jordan 0%
- 5Orem 0%
- 6Bountiful 0%
- 7Salt Lake City 0%
- 8Magna 0%
- 8Spanish Fork 0%
- 10North Ogden 0%
- 11Herriman 0%
- 12Enoch 0%
- 13Stansbury park 0%
- 14Hurricane 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, January 2023 · All cities in United States, January 2023 · Utah now
Use this board
SmogRank, most polluted cities in Utah, United States, PM2.5, January 2023, smogrank.com/us/region/utah/history/2023-01 (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.