Salt Lake City Air Quality in March
Across 2019–2025, Salt Lake City's March air quality had a median AQI of 46 (Good) over 217 monitored days in the Salt Lake City, UT area. 1.0% of March days (2 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 75.6% of days. The cleanest March on record here was 2020 (median AQI 44, 0 days above 100) and the worst was 2024 (median 45, 2 days above 100, peak AQI 230).
- Good: 67.7%
- Moderate: 31.3%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.5%
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 March?
Good on a typical day: median AQI 46 across 2019–2025, with 1.0% of March days above AQI 100. Ground-level ozone is the main driver.
- ✓67.7% of March days were Good (AQI 0–50), 31.3% Moderate (51–100).
- ✓2 days of 217 reached AQI 101+; the March peak was 230.
- ✓Best March: 2020; worst March: 2024.
Frequently asked questions
What is the air quality like in Salt Lake City in March?▾
Across 2019–2025, the median daily AQI in Salt Lake City in March was 46 (Good). 67.7% of days were Good, 31.3% Moderate, and 1.0% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is March a good time for outdoor exercise in Salt Lake City?▾
A typical March day in Salt Lake City sits in the Good range (median AQI 46), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 100 of March days (1.0%) reached AQI 101+ in 2019–2025.
Which pollutant causes Salt Lake City's March air quality problems?▾
Ground-level ozone set the daily AQI on 75.6% of March days in Salt Lake City. The highest March AQI recorded in 2019–2025 was 230 (Very Unhealthy), in 2024.
Salt Lake City March air quality, year by year
Salt Lake City March 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 | 31 | 47 | 0 | 87 | O3 |
| 2020cleanest | 31 | 44 | 0 | 70 | O3 |
| 2021 | 31 | 47 | 0 | 64 | O3 |
| 2022 | 31 | 48 | 0 | 74 | O3 |
| 2023 | 31 | 45 | 0 | 87 | O3 |
| 2024worst | 31 | 45 | 2 | 230 | O3 |
| 2025 | 31 | 51 | 0 | 87 | O3 |
What March air means in Salt Lake City
A typical March day in Salt Lake City sits in the Good range (median AQI 46), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 100 of March days (1.0%) reached AQI 101+ in 2019–2025.
March's median AQI of 46 is below Salt Lake City's whole-year median of 57, making it one of the area's cleaner periods. Nationally, the median March AQI across every EPA metro area (102,455 metro-days, 2019–2025) is 42, so Salt Lake City runs above the national March norm; 1.0% of its March days topped AQI 100 versus 0.4% nationally (about the same).
March is part of Salt Lake City's spring season (March, April, May); the spring page pools all three months.
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 month 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.