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 concernAll States
Alabama
AQI 43Alaska
AQI 41Arizona
AQI 48Arkansas
AQI 53California
AQI 59Colorado
AQI 47Connecticut
AQI 58Delaware
AQI 57District of Columbia
AQI 46Florida
AQI 46Georgia
AQI 48Hawaii
AQI 38Idaho
AQI 44Illinois
AQI 43Indiana
AQI 55Iowa
AQI 58Kansas
AQI 51Kentucky
AQI 46Louisiana
AQI 54Maine
AQI 63Maryland
AQI 40Massachusetts
AQI 43Michigan
AQI 49Minnesota
AQI 50Mississippi
AQI 54Missouri
AQI 58Montana
AQI 39Nebraska
AQI 47Nevada
AQI 51New Hampshire
AQI 40New Jersey
AQI 56New Mexico
AQI 42New York
AQI 46North Carolina
AQI 55North Dakota
AQI 59Ohio
AQI 49Oklahoma
AQI 62Oregon
AQI 52Pennsylvania
AQI 49Rhode Island
AQI 57South Carolina
AQI 51South Dakota
AQI 61Tennessee
AQI 52Texas
AQI 52Utah
AQI 75Vermont
AQI 49Virginia
AQI 55Washington
AQI 48West Virginia
AQI 64Wisconsin
AQI 47Wyoming
AQI 37Understanding 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.