EPA AirNow Air Quality

The EPA AirNow API provides real-time and forecast air quality data across the United States, Canada, and Mexico from over 2,500 monitoring stations. Data includes AQI values for PM2.5, PM10, ozone, CO, NO2, and SO2 along with health category ratings. Forecasts cover more than 500 cities. Rate limited to 500 requests per hour with a free API key.

Try a real question

Your question carries into your free workspace

EPA AirNow Air Quality

Try asking

What you can query

You can check current air quality observations by ZIP code or coordinates (observation/current), retrieve historical AQI data for any past date (observation/historical), and get air quality forecasts for upcoming days (forecast endpoint).

What you can do

  • Monitoring current air quality conditions by ZIP code or city
  • Checking AQI forecasts for outdoor event planning
  • Analyzing historical air quality trends during wildfire seasons
  • Comparing PM2.5 and ozone levels across metropolitan areas
  • Building health advisory tools based on real-time AQI data
  • Assessing air quality impacts for real estate and urban planning

Explore more datasets

Discover other public datasets and live API connections you can chat with.