Las Vegas vs Phoenix Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of September 16, 2026, Las Vegas, NV has cleaner air than Phoenix, AZ — AQI 31 (Good) vs 47 (Good), a gap of 16 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Las Vegas's reading is driven by O3 and Phoenix's by O3.
Las Vegas, NV
Good
Phoenix, AZ
Good
Summary
Las Vegas has 16 points better air quality
Las Vegas has an AQI of 31 compared to 47
Reduce Indoor Ozone in Phoenix
Today's main pollutant in Phoenix is ground-level ozone (AQI 47). 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.
Compare activated-carbon purifiers (for gases & ozone):
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