AQS API | Air Quality System | US EPA

Query AirData

An updated version of this API is now in open beta testing. Please visit the new API. This version of the API stopped getting new data at the end of February 2019 and will be taken off line at the end of August 2019.

Download data for a specific location and time for any pollutant by interactively querying the AQS Data Mart database.

A user ID and password are required to use this page. (Register for an account.)

More information is available on how to use this interface.
Please see the full API documentation (RAML Version) for data services available, REST service construction, output formats, etc.