Download air quality data

Please Note: Nitrogen Dioxide Diffusion Tube data will not be available for the current year. A complete calendar years’ worth of data is required. Click here for further detail on Diffusion Tubes. When using the data selector tool you can only select 5 years’ worth of data at one time.


All data are subject to verification and change until marked as RATIFIED. Users are reminded that caution should be taken when using non-ratified data, as the data may change as a result of the ratified process.


Carbon monoxide (CO) was monitored in Oxfordshire from 1997 to 2007 and sulphur dioxide (SO2) was monitored in Oxfordshire from 1995 to 2008. Monitoring of these pollutants ceased as levels were significant below the legal threshold.