Browse Cities by State
This directory lists 146 US cities across all 50 states and Washington, DC, grouped alphabetically by state, with each city's current EPA AirNow AQI, the state's average AQI, and its cleanest and most polluted city right now. Click any state to jump to its section, or any city for hourly readings, pollutant breakdowns and health guidance. For a single national ranking instead, see the city rankings or state pages.
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
6 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
11 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. Each value is the latest observation AirNow had published when this page was built. Cities are sorted within each state by AQI value, with the cleanest air first.