- All the APIs are provided for free.
- A valid key must be used for accessing the API.
- All the API are subjected to quota.
- The data can not be sold or included in sold packages.
- The data can not be used in paid applications or services.
- The data can not be redistributed as cached or archived data.
For the historical data, check the data platform page.
- Attribution to the World Air Quality Index Project as well as originating EPA is mandatory.
- Public usage by for-profit corporations requires explicit agreement wit the World Air Quality Index team.
- Public usage by non-profit organization requires prior notification (by email) to the World Air Quality Index team.
Please note that the we reserve the right to change the term of service at any time and without prior notice.