Salt Lake City Air Quality in 2025
In 2025, Salt Lake City's air quality (Salt Lake City, UT area) had a median daily AQI of 57 (Moderate) across 365 monitored days. 17 days (4.7%) reached Unhealthy for Sensitive Groups or worse, 120 were Good, and the year's peak AQI was 175 (Unhealthy). Ground-level ozone set the daily AQI on 228 of those days. The cleanest month of 2025 was October (median AQI 46, 0 days above 100) and the worst was June (median 77, 5 days above 100, peak 143).
- Good: 32.9%
- Moderate: 62.5%
- Unhealthy for Sensitive Groups: 4.4%
- Unhealthy or worse: 0.3%
Extra Protection for Salt Lake City Homes
Air quality in Salt Lake City is moderate (AQI 52), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
As an Amazon Associate, we earn from qualifying purchases.
How was Salt Lake City's air quality in 2025?
Moderate on a typical day: median AQI 57, with 17 days above AQI 100 out of 365 monitored — the 2nd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2025: 175 (Unhealthy).
- ✓Ground-level ozone was the main pollutant on 228 days.
- ✓Cleanest month: October; worst: June.
Frequently asked questions
What was the average AQI in Salt Lake City in 2025?▾
EPA's Air Quality System puts Salt Lake City's (Salt Lake City, UT) median daily AQI for 2025 at 57, which is Moderate. 17 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 175.
Which month had the worst air quality in Salt Lake City in 2025?▾
The cleanest month of 2025 was October (median AQI 46, 0 days above 100) and the worst was June (median 77, 5 days above 100, peak 143).
Was 2025 a good or bad year for Salt Lake City's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 2nd cleanest by days above AQI 100. 2025's median of 57 is in line with the area's typical annual median of 57.
Salt Lake City month by month in 2025
Salt Lake City air quality month by month, 2025 (Salt Lake City, UT, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 52 | 0 | 90 | PM2.5 |
| February | 28 | 48 | 0 | 93 | O3 |
| March | 31 | 51 | 0 | 87 | O3 |
| April | 30 | 66 | 0 | 93 | O3 |
| May | 31 | 80 | 3 | 175 | O3 |
| Juneworst | 30 | 77 | 5 | 143 | O3 |
| July | 31 | 71 | 3 | 122 | O3 |
| August | 31 | 71 | 5 | 115 | O3 |
| September | 30 | 52 | 1 | 122 | O3 |
| Octobercleanest | 31 | 46 | 0 | 77 | O3 |
| November | 30 | 54 | 0 | 76 | PM2.5 |
| December | 31 | 48 | 0 | 88 | PM2.5 |
How 2025 compares
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 2nd cleanest by days above AQI 100.
2025's median of 57 is in line with the area's typical annual median of 57.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Salt Lake City
The latest EPA AirNow observation puts Salt Lake City's AQI at 52 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Salt Lake City air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Salt Lake City, UT), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.