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.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Air Data: Air Quality Data Collected at Outdoor Monitors Across the US

Outdoor Air Quality Data

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.
Visualize Trends

The multiyear tile plot shows long-term changes in air quality.
Daily Air Quality Tracker

The daily air quality tracker lets you compare recent AQI values with historical data.

Download Data

Monitor Locations

Interactive Map of Air Quality Monitors

About Air Data

Data Viz Tools

Summary Reports

Technical Reports