The airnow integration uses the AirNow web service as a source for air quality data for your location.


To generate an AirNow API key, go to the AirNow Developer Tools Page page.


Adding AirNow to your Home Assistant instance can be done via the user interface, by using this My button:

The AirNow API allows 500 data updates per hour, but since observations are only updated hourly, the default update rate is set to 2 per hour and should not trigger rate limiting. If you use this API key for other purposes, ensure the total request rate does not exceed 500 per hour.