Data: EPA AirNow, FEMA National Risk Index Last verified: 2026-05-03

What is AQI?

The Air Quality Index (AQI) is a standardized scale from 0 to 500 that measures air pollution levels. 0-50 is "Good," 51-100 is "Moderate," 101-150 is "Unhealthy for Sensitive Groups," and above 150 is "Unhealthy" for everyone. AQI tracks five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Las Vegas's average AQI of 67 falls in the "Moderate" range.

How do wildfires affect air quality?

Wildfire smoke contains fine particulate matter (PM2.5) that can travel hundreds of miles and dramatically spike AQI readings. During fire season, even cities far from active fires can experience unhealthy air. HEPA air purifiers (rated for PM2.5) are the most effective indoor protection. Check AirNow.gov for real-time conditions during fire season.

Air Quality Map: Las Vegas, NV

Each dot represents a ZIP code. Color indicates AQI level. Tap a dot for details.

Good (0-50) Moderate (51-100) USG (101-150) Unhealthy (151+)

Air Quality by ZIP Code in Las Vegas

AQI varies across Las Vegas's 77 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
89101	67	Moderate	51	28	View report →
89102	67	Moderate	51	31	View report →
89103	67	Moderate	51	24	View report →
89104	67	Moderate	51	31	View report →
89105	67	Moderate	51	6	View report →
89106	67	Moderate	51	24	View report →
89107	67	Moderate	51	25	View report →
89108	67	Moderate	51	24	View report →
89109	67	Moderate	51	18	View report →
89110	67	Moderate	51	27	View report →
89111	67	Moderate	51	6	View report →
89112	67	Moderate	51	6	View report →
89113	67	Moderate	51	15	View report →
89114	67	Moderate	51	10	View report →
89115	67	Moderate	51	19	View report →

Showing 15 of 20 ZIP codes. View all.

Air Quality Overview

Las Vegas, Nevada has moderate air quality with an average AQI of 67. Air quality is acceptable, though some pollutants may be a concern for a small number of people who are unusually sensitive to air pollution. The dominant pollutant is Ozone.

The Air Quality Index (AQI) is an EPA-standardized scale from 0 to 500. Values below 50 are "Good," 51-100 "Moderate," 101-150 "Unhealthy for Sensitive Groups," 151-200 "Unhealthy," 201-300 "Very Unhealthy," and above 300 "Hazardous."

Dominant Pollutant: Ozone

Ground-level ozone forms when pollutants from cars, power plants, and industrial facilities react with sunlight. Unlike stratospheric ozone, ground-level ozone is harmful to breathe.

Health effects of ozone exposure:

• Irritation of the respiratory system
• Reduced lung function
• Aggravation of asthma and chronic lung diseases
• Increased susceptibility to respiratory infections

Peak times: Ozone levels are typically highest on hot, sunny afternoons. Exercise outdoors in the morning when levels are lower.

Air Quality by ZIP Code in Las Vegas

AQI varies across Las Vegas's 77 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

Showing 15 of 77 ZIP codes. Check your specific ZIP for detailed data.

Wildfire Smoke Risk

Las Vegas has an elevated wildfire smoke risk with an average smoke risk score of 51 (scale 0-100). There have been 970 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	51
Max smoke risk score	51
Fires within 100 km	970
High-risk ZIP codes	77

Wildfire smoke contains PM2.5, carbon monoxide, and volatile organic compounds. Even short-term exposure can trigger asthma attacks and respiratory distress.

Indoor Mold Risk

Las Vegas has an average mold risk score of 13 out of 100.

Factor	Value
Mold risk score	13/100
Average humidity	36% RH
High-risk ZIPs	0
Peak season	balanced

Mold risk is influenced by humidity levels, housing age (older homes have more moisture issues), flood history, and water infrastructure quality. Indoor humidity above 60% creates favorable conditions for mold growth.

Signs of mold problems: musty odors, visible growth on walls or ceilings, worsening allergies indoors, condensation on windows. Professional mold testing ($300-$600) can identify hidden issues.

Health Recommendations

With moderate air quality (AQI 67), most people can be active outdoors. Sensitive groups should take precautions:

• Sensitive groups (asthma, COPD, heart disease): consider reducing prolonged outdoor exertion
• Keep windows closed on high-pollution days
• Use a HEPA air purifier in main living areas
• Check AirNow.gov before outdoor exercise

Las Vegas vs. Nearby Nevada Cities

How Las Vegas's air quality compares to nearby cities:

ZIP Codes in Las Vegas

Las Vegas covers 77 ZIP codes. Air quality can vary by neighborhood based on proximity to highways, industrial areas, and green spaces. Check your specific ZIP code for localized data.

Data Sources

• Air quality: EPA AirNow — real-time and historical AQI data
• Wildfire risk: FEMA National Risk Index
• Mold risk: Derived from EPA, FEMA, Census ACS (humidity, housing age, flood history)
• Monthly AQI: EPA Air Quality Statistics

Updated daily.