Check the map at the top of this page before you make any outdoor plans today. Henderson’s AQI doesn’t hold steady. On a calm January morning, the reading can sit at 30. After a wind event off the Mojave or an afternoon inversion, that same number can push past 150 before sundown.
Henderson occupies the eastern end of the Las Vegas Valley, inside Clark County, where desert dust, vehicle exhaust on the I-215 and US-95, and wildfire smoke all pool in the same trapped air. From June through October, fires in California and Nevada push PM2.5 plumes directly over the valley. The basin geography gives that air nowhere to go.
The live map above pulls data from EPA AirNow monitoring stations across Clark County, run by the Clark County Department of Environment and Sustainability. Check it. Then decide what your day looks like.
TL;DR Quick Answers
Live Air Quality Index AQI Map Now & Today in Henderson Nevada
Henderson’s live AQI updates hourly from EPA AirNow monitoring stations run by the Clark County Department of Environment and Sustainability. The map at the top of this page shows current conditions in real time.
Here is what today’s number means for you:
- 0-50 (Good): Safe for all outdoor activity
- 51-100 (Moderate): Fine for most; sensitive individuals should limit extended exertion
- 101-150 (Unhealthy for Sensitive Groups): Residents with asthma, heart conditions, children, and older adults should reduce outdoor time
- 151-200 (Unhealthy): Everyone should limit outdoor activity; keep windows closed
- 201+ (Very Unhealthy / Hazardous): Stay indoors; run HVAC on recirculation
Henderson’s AQI shifts fast. Desert dust, summer ozone, and wildfire smoke (June through October) can push the number from Good to Unhealthy in a single afternoon. Check the live map before outdoor plans, not after.
Top Takeaways
• Henderson’s AQI comes from Clark County’s Department of Environment and Sustainability via real-time EPA AirNow data.
• An AQI above 100 exceeds National Ambient Air Quality Standards (NAAQS) and may be unhealthy for some or all residents.
• Henderson carries elevated PM2.5 and PM10 risks during wildfire season (June through October) and high-wind dust events in spring.
• Summer ozone in the Las Vegas Valley consistently ranks among the worst in the country, driven by heat, traffic, and basin geography.
• High-AQI days push fine particles into your home through open windows, door gaps, and your HVAC return.
• Residents with asthma, COPD, or heart conditions, as well as children and older adults, should act on readings above 100.
• Check Henderson’s AQI before morning outdoor activity, before school drop-off, and any time a Red Flag or High Wind Advisory is in effect.
Table of Contents
Understanding Henderson’s AQI Scale
The Air Quality Index runs from 0 to 500 across six categories. Each one tells you what the air is doing and what you should do about it.
Here is what each range means for Henderson, NV residents:
• 0-50 (Good): Air quality is satisfactory. Safe for all outdoor activities.
• 51-100 (Moderate): Fine for most people. Unusually sensitive individuals should limit extended outdoor exertion.
• 101-150 (Unhealthy for Sensitive Groups): Residents with asthma, COPD, or heart conditions, children, and older adults should cut back on prolonged outdoor activity.
• 151-200 (Unhealthy): Everyone may feel health effects. Limit outdoor exertion and keep windows closed.
• 201-300 (Very Unhealthy): Serious health effects for all. Avoid going outside. Switch your HVAC to recirculation mode.
• 301+ (Hazardous): Health emergency conditions. Stay indoors. Seal gaps around windows and doors.
What Drives Henderson’s Air Quality Readings
Clark County tracks five pollutants when calculating the daily AQI:
• PM2.5: Fine particles under 2.5 microns. Henderson’s biggest recurring problem. Sources include wildfire smoke, vehicle exhaust on the I-215 and Boulder Highway, and construction equipment. These particles are small enough to reach deep lung tissue.
• PM10: Coarser desert dust. Windstorms off the Mojave push PM10 levels high fast, often without much warning.
• Ozone (O3): A summer issue across the Las Vegas Valley. Heat and traffic emissions react to form ground-level ozone, and Henderson’s inland basin location traps it through the afternoon.
• Carbon Monoxide (CO): Mostly from vehicle traffic and combustion. CO levels tend to peak during cold-weather starts on winter mornings in Clark County.
• Nitrogen Dioxide (NO2): Comes from vehicle traffic and Henderson’s industrial corridor near I-11 and Gibson Road. It adds to baseline AQI readings daily.
Why Henderson’s AQI Changes Day to Day
Henderson’s air quality doesn’t follow a predictable schedule. A few things drive the shifts:
• Season: Wildfire smoke season runs June through October. Fires in California and Nevada send PM2.5 plumes over the Las Vegas Valley fast, sometimes overnight. Spring brings high-wind dust events that spike PM10. Summer afternoons layer in ozone from heat and traffic.
• Geography: The Spring Mountains and McCullough Range form a natural basin around Henderson. During inversion events, the atmosphere caps low and pollutants build. On the same afternoon, Henderson can read worse than northwest Las Vegas while tracking identical weather.
• Local Sources: Daily traffic on the I-215, I-515, Boulder Highway, and US-95 feeds PM2.5 and NO2 into the air. Henderson’s industrial zones near the southern airport corridor add to weekday baseline readings.
From the field: On service calls across Henderson and Clark County, we have replaced air filters clogged with fine particulates in under three weeks during active wildfire events. High-AQI days are not just an outdoor health issue. They shorten the life of every filter inside your home.
Health Guidance by AQI Level for Henderson Residents
Use this as your daily action guide:
1. AQI 0-50 (Good): No restrictions. Get outside.
2. AQI 51-100 (Moderate): Most people are fine. Unusually sensitive individuals should keep prolonged outdoor exertion short.
3. AQI 101-150 (Unhealthy for Sensitive Groups): If you have asthma, heart disease, or a lung condition, reduce outdoor activity. Children and older adults should take indoor breaks. Keep windows closed.
4. AQI 151-200 (Unhealthy): Everyone should reduce extended outdoor activity. Sensitive groups should stay in. Close all windows. Run your HVAC on recirculation with a clean MERV-8 or higher filter.
5. AQI 201+ (Very Unhealthy / Hazardous): Stay indoors. No outdoor exertion. HEPA purifiers and high-MERV filtration matter most on these days.
“In the Las Vegas Valley, we see the AQI shift from Green to Orange between a morning service call and an afternoon one, especially during wildfire season. When the AQI climbs above 100 in Henderson, the homes where we service HVAC systems show it in the filters first.”— FilterBuy Air Quality Research Team
Essential Resources
These are the sources Henderson residents and HVAC professionals rely on for live air quality data, health guidance, and pollutant information:
• EPA AirNow — Live AQI Map for Henderson, NV: airnow.gov
The EPA’s primary real-time air quality reporting tool. Includes interactive maps, AQI forecasts, and health action guides for Clark County.
• Clark County Dept. of Environment and Sustainability — Real-Time Monitoring: desaqmonitoring.clarkcountynv.gov
Clark County’s live AQI monitoring portal, pulling data from stations across the Las Vegas Valley including Henderson-area sites.
• Air Quality Index — Full Technical Reference: en.wikipedia.org/wiki/Air_quality_index
A full breakdown of how the AQI is calculated, how different countries apply it, and what each pollutant threshold means.
• Nevada Division of Environmental Protection (NDEP) — Air Quality: ndep.nv.gov/air/air-quality-monitoring
Nevada’s statewide air quality authority. Publishes monitoring data, exceedance reports, and links to Clark County’s independent monitoring network.
• EPA — Health and Environmental Effects of PM2.5: epa.gov/pm-pollution
The EPA’s reference on how fine particulate matter affects human health, covering short-term and long-term exposure risks.
• EPA AirNow — AQI Basics Guide: airnow.gov/aqi/aqi-basics
A plain-language explanation of what the AQI number means, how each pollutant is measured, and what to do at each level.
Statistics
156 Million Americans Living in Areas with Failing Air Quality Grades
156 million Americans (nearly 46% of the U.S. population) live in areas that received a failing grade for at least one measure of air pollution, according to the American Lung Association’s State of the Air 2025 report. Henderson and the Las Vegas Valley are among them.
Source: American Lung Association — State of the Air 2025
Las Vegas-Henderson Ranked 9th Worst Nationally for Ozone Pollution
The Las Vegas-Henderson area ranked 9th worst nationally for ozone pollution, per the American Lung Association’s State of the Air report. Clark County has never met federal attainment levels for ozone. That makes a daily AQI check a habit, not an occasional precaution.
Source: American Lung Association — State of the Air
AQI 100 Is the Federal Threshold for Unhealthy Air in Nevada
An AQI above 100 exceeds National Ambient Air Quality Standards (NAAQS), according to the Nevada Division of Environmental Protection. At that level or above, air conditions may be unhealthy for some or all Henderson residents.
Source: Nevada Division of Environmental Protection — Air Quality Exceedances
Final Thoughts and Opinion
Henderson’s air moves faster than most forecasts account for. Desert dust, summer ozone, and wildfire smoke make the Las Vegas Valley one of the harder air environments in the country to plan around. The live AQI map on this page takes the guesswork out.
The most underused habit in Henderson homes is a daily AQI check before stepping outside. Residents who make it routine catch filter problems early, keep their HVAC systems running longer, and protect their households from the cumulative effects of particulate exposure.
If you manage asthma, heart disease, or a respiratory condition in your household, build an AQI check into your routine from May through October. Southern Nevada’s air quality shifts faster than a 10-day weather forecast.
One more thing worth saying directly: the AQI is not just an outdoor number. When PM2.5 spikes outside, it gets inside, through gaps, through open windows, and through your HVAC return. Your air filter is what stands between outdoor air quality and the air your family breathes. On the highest-AQI days in Henderson, that filter is doing its most important work.
Frequently Asked Questions
What is the live air quality index in Henderson, Nevada right now?
Henderson’s current AQI is on the live map at the top of this page. Data comes in real time from EPA AirNow monitoring stations run by the Clark County Department of Environment and Sustainability. The reading updates hourly and reflects conditions at the nearest active monitor to Henderson.
What is a good AQI number for Henderson, NV today?
AQI 0-50 is Good and safe for everyone, including children and outdoor workers. AQI 51-100 is Moderate and acceptable for most residents. Above 100 is where Henderson residents with respiratory or heart conditions, older adults, and children should start limiting outdoor time.
How does Clark County air quality affect Henderson residents specifically?
Clark County covers the entire Las Vegas Valley, but Henderson’s position in the eastern basin creates its own conditions. On days with Mojave dust events, Henderson can read higher PM10 than northwest Las Vegas. Ozone and PM2.5 from wildfire smoke tend to spread more evenly across the valley. Use the live map for Henderson-specific station data rather than a general Las Vegas AQI reading.
What should I do when Henderson’s AQI is unhealthy?
Above 100, limit prolonged outdoor activity, especially for sensitive groups. Close windows. Switch your HVAC to recirculation mode and check your air filter. High-AQI days push more particulates through your system. If you are running a standard filter and the AQI spikes above 150 from wildfire smoke, a MERV-11 or higher will give meaningfully better indoor protection.
Where can I find a live AQI map for the Las Vegas Valley?
The live AQI map at the top of this page covers Henderson and the broader Las Vegas Valley in real time. Clark County also runs its own monitoring portal at desaqmonitoring.clarkcountynv.gov. EPA AirNow at airnow.gov carries regional data and AQI forecasts for Henderson and Clark County.
What pollutants affect Henderson’s outdoor air quality?
Henderson’s AQI tracks PM2.5 from wildfire smoke and vehicle exhaust, PM10 from desert dust, ozone from heat and traffic emissions, carbon monoxide from combustion sources, and nitrogen dioxide from vehicle traffic and the southern industrial corridor. PM2.5 and ozone push Henderson’s AQI above 100 most often.
Does Henderson’s air quality affect indoor air quality?
Yes. PM2.5 from wildfire smoke and ozone precursors get into homes through gaps around windows, doors, and HVAC return systems. On high-AQI days, outdoor conditions directly affect what your filtration system works against. Keeping windows closed and running your HVAC with a MERV-8 or higher filter helps protect indoor air when outdoor air quality drops in Henderson.
Check Live Henderson Air Quality and Find the Right Filter for Your Home
High-AQI days in Henderson don’t stop at your front door. Fine particles and ozone get in through gaps, windows, and your HVAC return. Your air filter is what stands between Henderson’s outdoor air and the air inside your home. When the AQI climbs above 100, the right MERV-rated filter keeps PM2.5, dust, and wildfire smoke out. The wrong one lets it through.