Background maps are provided to assist UK Local Authorities with their Review and Assessment of air quality, where local monitoring data is not available. Background concentrations are provided for each 1 * 1 kilometre grid square by Local Authority. Concentrations are available for a 2010 base year and at yearly intervals up to 2030. If modellers subtract emission sectors from the NOx background maps, they must update the NO2 map accordingly.
This tool can be used to justify the process i.e. help assess air pollutant concentrations.http://laqm.defra.gov.uk/review-and-assessment/tools/background-maps.html
This tool is part of a group, click the icon to see the tools in the group.