Air Quality by State
Browse comprehensive air quality data for all 51 US states and territories. Each state page provides detailed city-by-city AQI information, regional air quality patterns, and health recommendations based on official EPA data.
States with Cleanest Air
View all cleanest citiesStates Requiring More Attention
View all areas of concernExtra Protection for Texas Homes
Air quality in Texas is moderate (AQI 63), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Compare top-rated True-HEPA purifiers:
Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
All States
Alabama
AQI 44Alaska
AQI 29Arizona
AQI 43Arkansas
AQI 39California
AQI 57Colorado
AQI 46Connecticut
AQI 27Delaware
AQI 23District of Columbia
AQI 25Florida
AQI 36Georgia
AQI 36Hawaii
AQI 31Idaho
AQI 32Illinois
AQI 28Indiana
AQI 24Iowa
AQI 36Kansas
AQI 38Kentucky
AQI 29Louisiana
AQI 54Maine
AQI 23Maryland
AQI 23Massachusetts
AQI 32Michigan
AQI 45Minnesota
AQI 32Mississippi
AQI 48Missouri
AQI 31Montana
AQI 26Nebraska
AQI 15Nevada
AQI 50New Hampshire
AQI 24New Jersey
AQI 37New Mexico
AQI 32New York
AQI 28North Carolina
AQI 22North Dakota
No dataOhio
AQI 30Oklahoma
AQI 52Oregon
AQI 52Pennsylvania
AQI 33Rhode Island
AQI 26South Carolina
AQI 31South Dakota
AQI 28Tennessee
AQI 40Texas
AQI 63Utah
AQI 43Vermont
AQI 22Virginia
AQI 43Washington
AQI 35West Virginia
AQI 18Wisconsin
AQI 31Wyoming
AQI 32Understanding State Air Quality Data
Air quality varies significantly across different states due to a combination of geographic, climatic, economic, and demographic factors. Understanding these variations helps you make informed decisions about outdoor activities, travel, and relocation.
Factors Affecting State Air Quality
- Population density: More people typically means more vehicle emissions and energy consumption
- Industrial activity: Manufacturing, power generation, and mining contribute to local pollution
- Geography: Valleys and basins can trap pollution, while coastal areas often have cleaner air
- Climate: Hot, sunny weather increases ozone formation; temperature inversions trap pollutants
- Wildfire risk: Western states face seasonal smoke impacts from wildfires
How to Use This Data
- Click any state to see detailed city-level air quality data
- Compare states when planning relocation or extended travel
- State averages represent typical conditions; check specific cities for detailed data
- Consider seasonal variations when comparing long-term air quality
The average AQI shown for each state is calculated from all monitored cities within that state. Air quality can vary significantly within a state, so we recommend checking individual city pages for the most accurate local information.
Official EPA Data
All air quality data comes directly from the EPA's official monitoring network.