See the air quality history where you live
Look up any U.S. county with EPA air monitoring to see how many days had Good, Moderate or Unhealthy air each year from 1980 to 2025, with the limits of the data explained.
Browse by state
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
- Georgia
- Guam
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Puerto Rico
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virgin Islands
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
About this data
Every figure comes from EPA’s public AirData files, which summarize readings from regulatory air monitors. Each county page shows the source year range, the EPA file dates and how many days were actually monitored, so you can tell a quiet record from a missing one.
EnviroNearby is independent and free to use, with no sign-up. It describes measured air quality; it does not rate places as safe or unsafe. Read the methodology.