Las Vegas Air Quality in Spring
Across 2019–2025, Las Vegas's spring (March–May) air quality had a median AQI of 54 (Moderate) over 644 monitored days in the Las Vegas-Henderson-Paradise, NV area. 4.6% of spring days (30 of 644) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 88.5% of days. The cleanest spring on record here was 2019 (median AQI 50, 0 days above 100) and the worst was 2024 (median 60, 9 days above 100, peak AQI 134).
- Good: 37.1%
- Moderate: 58.2%
- Unhealthy for Sensitive Groups: 4.3%
- Unhealthy or worse: 0.3%
Reduce Indoor Ozone in Las Vegas
Today's main pollutant in Las Vegas is ground-level ozone (AQI 31). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Las Vegas in spring?
Moderate on a typical day: median AQI 54 across 2019–2025, with 4.6% of spring days above AQI 100. Ground-level ozone is the main driver.
- ✓37.1% of spring days were Good (AQI 0–50), 58.2% Moderate (51–100).
- ✓30 days of 644 reached AQI 101+; the spring peak was 260.
- ✓Cleanest month: March; worst month: May.
Frequently asked questions
What is the air quality like in Las Vegas in spring?▾
Across 2019–2025, the median daily AQI in Las Vegas in spring was 54 (Moderate). 37.1% of days were Good, 58.2% Moderate, and 4.6% 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 Las Vegas?▾
A typical spring day in Las Vegas 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 22 of spring days (4.6%) reached AQI 101+ — the level at which EPA advises people with asthma, children and older adults to shorten hard outdoor exertion.
Which pollutant causes Las Vegas's spring air quality problems?▾
Ground-level ozone set the daily AQI on 88.5% of spring days in Las Vegas. The highest spring AQI recorded in 2019–2025 was 260 (Very Unhealthy), in 2024.
Las Vegas spring air quality, year by year
Las Vegas spring air quality by year (Las Vegas-Henderson-Paradise, NV, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019cleanest | 92 | 50 | 0 | 91 | O3 |
| 2020 | 92 | 49 | 3 | 126 | O3 |
| 2021 | 92 | 55 | 3 | 112 | O3 |
| 2022 | 92 | 61 | 4 | 260 | O3 |
| 2023 | 92 | 67 | 7 | 112 | O3 |
| 2024worst | 92 | 60 | 9 | 134 | O3 |
| 2025 | 92 | 56 | 4 | 119 | O3 |
What spring air means in Las Vegas
A typical spring day in Las Vegas 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 22 of spring days (4.6%) 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 below Las Vegas's whole-year median of 62, making it one of the area's cleaner periods. Nationally, the median Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Las Vegas runs above the national Spring norm; 4.6% of its Spring days topped AQI 100 versus 0.8% nationally (above average).
Within the season, March is the cleanest month (median AQI 48, 0.5% of days above 100) and May the worst (median 74, 11.1% above 100).
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Las Vegas
The latest EPA AirNow observation puts Las Vegas's AQI at 31 (O3). The figures above are multi-year season statistics, not today's reading.
View current Las Vegas air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Las Vegas-Henderson-Paradise, NV), 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.