Environment, Nature & Climate · North America

USA - EPA Annual Air Quality Index (2024)

EPA Air Quality System (AQS) annual Air Quality Index (AQI) summary for the United States by county, calendar year 2024. Per-county count of days in each AQI category (Good 0-50, Moderate 51-100, Unhealthy for Sensitive Groups 101-150, Unhealthy 151-200, Very Unhealthy 201-300, Hazardous 301+);…

Source: U.S. Environmental Protection Agency

Licence: Public Domain (U.S. Government Works)