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AIRNOW · LAS VEGAS REPORTING AREA
Checking the latest report…
Regional observations from AirNow and Clark County air-quality reporting. This is an area report, not a monitor on your street.
Check a local allergy forecast for pollen levels. Air quality and pollen measure different things.
Days with good air
25%
90 of 366 days
Median AQI
64
Moderate
Unhealthy-for-sensitive days or worse
40
Main pollutant
Ozone
251 days
Worst reading
AQI 170
Unhealthy
Average daily AQI for each month, 2022–2024. March is usually the cleanest month and July the worst.
Bars show days each year at “unhealthy for sensitive groups” (AQI above 100) or worse.
Ozone forms on hot, sunny afternoons, so it peaks in summer; plan runs and outdoor play for the morning on high-ozone days. Fine particles (PM2.5) come from wildfire smoke, traffic and wood burning and can spike in any season. Above 100, people with asthma, heart or lung conditions, older adults and children should limit long or heavy exertion outdoors.
In 2024, 25% of days had good air (AQI 50 or below) at Clark County monitors, 64% were moderate and 40 days reached unhealthy for sensitive groups or worse. The median AQI was 64.
From 2022 to 2024, July had the highest average AQI (88) and March the lowest (51).
ozone (smog) was the main pollutant on 251 of 366 days in 2024.
The median AQI was 61 in 2015 and 64 in 2024; days at unhealthy for sensitive groups or worse went from 23 to 40.
Source: U.S. EPA AirData, annual and daily AQI by county, Clark County, Nevada. County figures use the highest reading among the county’s monitors each day.
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