Salt Lake City Air Quality in Spring
Across 2019–2025, Salt Lake City's spring (March–May) air quality had a median AQI of 54 (Moderate) over 644 monitored days in the Salt Lake City, UT area. 1.5% of spring days (10 of 644) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 83.1% of days. The cleanest spring on record here was 2020 (median AQI 49, 0 days above 100) and the worst was 2024 (median 54, 4 days above 100, peak AQI 230).
- Good: 42.1%
- Moderate: 56.4%
- Unhealthy for Sensitive Groups: 1.2%
- 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
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How is the air in Salt Lake City in spring?
Moderate on a typical day: median AQI 54 across 2019–2025, with 1.5% of spring days above AQI 100. Ground-level ozone is the main driver.
- ✓42.1% of spring days were Good (AQI 0–50), 56.4% Moderate (51–100).
- ✓10 days of 644 reached AQI 101+; the spring peak was 230.
- ✓Cleanest month: April; worst month: May.
Frequently asked questions
What is the air quality like in Salt Lake City in spring?▾
Across 2019–2025, the median daily AQI in Salt Lake City in spring was 54 (Moderate). 42.1% of days were Good, 56.4% Moderate, and 1.5% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Salt Lake City?▾
A typical spring day in Salt Lake City is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 67 of spring days (1.5%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Salt Lake City's spring air quality problems?▾
Ground-level ozone set the daily AQI on 83.1% of spring days in Salt Lake City. The highest spring AQI recorded in 2019–2025 was 230 (Very Unhealthy), in 2024.
Salt Lake City spring air quality, year by year
Salt Lake City spring air quality by year (Salt Lake City, UT, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 92 | 54 | 0 | 97 | O3 |
| 2020cleanest | 92 | 49 | 0 | 100 | O3 |
| 2021 | 92 | 54 | 0 | 97 | O3 |
| 2022 | 92 | 58 | 2 | 111 | O3 |
| 2023 | 92 | 50 | 1 | 108 | O3 |
| 2024worst | 92 | 54 | 4 | 230 | O3 |
| 2025 | 92 | 64 | 3 | 175 | O3 |
What spring air means in Salt Lake City
A typical spring day in Salt Lake City is Moderate (median AQI 54): outdoor exercise is acceptable for most people, but unusually sensitive individuals should watch for symptoms, and about 1 day in 67 of spring days (1.5%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Spring's median AQI of 54 is in line with Salt Lake City's whole-year median of 57, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Salt Lake City runs above the national Spring norm; 1.5% of its Spring days topped AQI 100 versus 0.8% nationally (about the same).
Within the season, April is the cleanest month (median AQI 54, 0.5% of days above 100) and May the worst (median 64, 3.3% above 100).
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 season 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.