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Last updated on October 29, 2024
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Use the tools on this site to access recent and historical data.
For current air quality, visit AirNow.gov.
During fire events, use the Fire and Smoke map.
The multiyear tile plot shows long-term changes in air quality.
The daily air quality tracker lets you compare recent AQI values with historical data.