Number of NO2 pollution days in urban sites in the UK 2010-2023

Not every site in the automatic monitoring network is included. Sites must also meet certain data capture targets to be used in the index. For the required pollutants data capture should be more than or equal to 75% of the year.
This statistic using original data from the Department for Environment, Food and Rural Affairs and includes copyright material licensed under © Crown, the Open Government License v3.0