Browse Cities by State
Explore air quality data for all monitored cities across the United States, organized by state. Compare AQI levels, view state averages, and find detailed information for your area.
Quick Jump to State
Alabama
2 citiesAlaska
1 cityArizona
4 citiesArkansas
1 cityCalifornia
15 citiesColorado
4 citiesConnecticut
2 citiesDelaware
1 cityDistrict of Columbia
1 cityFlorida
10 citiesGeorgia
4 citiesHawaii
1 cityIdaho
1 cityIllinois
5 citiesIndiana
2 citiesIowa
1 cityKansas
1 cityKentucky
2 citiesLouisiana
2 citiesMaine
1 cityMaryland
1 cityMassachusetts
4 citiesMichigan
5 citiesMinnesota
2 citiesMississippi
1 cityMissouri
2 citiesMontana
1 cityNebraska
2 citiesNevada
2 citiesNew Hampshire
1 cityNew Jersey
4 citiesNew Mexico
2 citiesNew York
8 citiesNorth Carolina
5 citiesNorth Dakota
1 cityOhio
6 citiesOklahoma
2 citiesOregon
1 cityPennsylvania
6 citiesRhode Island
1 citySouth Carolina
2 citiesSouth Dakota
1 cityTennessee
3 citiesTexas
12 citiesUtah
1 cityVermont
1 cityVirginia
3 citiesWashington
4 citiesWest Virginia
1 cityWisconsin
2 citiesWyoming
1 cityUnderstanding Air Quality Levels
Good
Air quality is satisfactory, and air pollution poses little or no risk.
Moderate
Air quality is acceptable. However, there may be a risk for some people.
Unhealthy
Sensitive groups may experience health effects. Everyone should limit outdoor activities.
Related Resources
About This Data
Air quality data is sourced from EPA monitoring stations via the AirNow network. The Air Quality Index (AQI) is calculated from measurements of five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Data is updated hourly to reflect current conditions. Cities are sorted within each state by AQI value, with the cleanest air first.