Sensor air quality data

Sensor data sources
Name	Source	Data Type	Notes
Breathe London	Breathe London	Sensor	One hour averaged data. Earliest data for some locations is from February 2021. Managed by Imperial College's Measurement Team.
Earthsense	Earthsense	Sensor	15 minute averaged data from selected school sites. Earliest data for some locations is from December 2021.

Please note:

Sensor data are sourced from a range of equipment types according to a range of operational standards. Data can therefore be processed using different proprietary methods each day and is not directly comparable between different sensor types.
We aim to refresh our export files every night, but validation of some third-party data sources can take up to 48 hours, so please be aware that some of the most recent data in these files may change.
Data is reviewed retrospectively by the data providers, and some updates may be made at a later date. These may not always be reflected in our download files, and you should visit the data source’s website directly for the most up-to-date data.
Please refer to our guide on data sources for further information.

Air quality data download