Occasionally, data which have been reported as ratified are subsequently changed or deleted in light of new information received by the QA/QC Unit. Here, sites can be checked to see if any data have been changed. Please note that only AURN monitoring sites will show in this tool.
The details of significant changes to ratified data shown on this page are for automatic monitoring stations since 2009. Such changes may include large sections of data being added or removed, or changes which would significantly affect the exceedence statistics for a dataset.
Details about the data verification and ratification process may also be of interest.
Select the site you are interested in from the drop-down box for a list of these changes.
Due to the high level of public interest, the Environment Agency has taken the decision to provide ratified monitoring results from this station directly to the Wales Air Quality Forum website. The data will be uploaded on a quarterly basis. Please note that there is a separate note on the data Verification and Ratification Procedures for the Prince Street Mobile Monitoring Facility.