Adding your co-location data

Bias adjustment factors determined from Local Authority co-location studies throughout the UK have been collated by the Local Air Quality Management Helpdesk. They are available as a spreadsheet database from the bias adjustment factors page.

To help keep this database up to date, it is recommended that all Local Authorities who have carried out a co-location study in which NO2 diffusion tubes have been exposed alongside an automatic (chemiluminescent) NO2 analyser, for nine or more months in any calendar year, send their data for inclusion.

We appreciate submission of co-location study data to populate the National Bias Adjustment Spreadsheet. To add your co-location data to the database, please click on the link below to download a questionnaire, which provides all the information and contact details you need.

Questionnaire to add Your Co-location Data to the Diffusion Tube Bias Adjustment Factors Spreadsheet (XLS, 87KB)

The next version of the National Bias Adjustment Spreadsheet is due in March 2020, which will incorporate diffusion tube monitoring data for 2019. To ensure your study is included (pending data quality checks) please return your questionnaire by the start of the month.