On behalf of the Scottish Government, and as part of the Scottish Air Quality Database (SAQD) project, Ricardo Energy & Environment provide mapped concentrations of pollutants for Scotland. The most recent maps are for the year 2019 and provide representation of the spatial distribution of background and roadside annual mean concentrations of:
- gravimetric equivalent PM10 concentration (PM10), and
- NOx and NO2
Background concentrations are mapped at a spatial resolution of 1 km2 (1 km x 1 km grid) and roadside concentrations are mapped for urban major road links throughout Scotland.
The methodology for the Scottish modelling is based on the UK Pollution Climate Mapping (PCM) approach. The modelling used to produce the Scottish pollutant concentration maps incorporates exclusively Scottish pollutant measurement data, Scottish meteorological data and spatially disaggregated emissions information from the UK's National Atmospheric Emissions Inventory (NAEI).
Scotland-specific maps are not currently available for PM2.5. The provision of PM2.5 maps continues to be reviewed as new PM2.5 monitoring stations and more data are added to the SAQD.
The monitoring data used in the mapping work includes appropriately scaled PM10 monitoring data (FDMS, Partisol and VCM corrected TEOM data) and automatic monitoring data for NOx and NO2, and Scottish meteorological data from RAF Leuchars.
The latest modelling results and maps of the modelled air pollutant concentrations for 2019 are provided in the most recent technical report. This report has been published as a webpage and includes interactive elements (e.g. some tables and all maps) to enhance the presentation of the report content.
Projected background annual mean maps of NOx, NO2 and PM10 for the years 2018 to 2030 are available for download (see the Data for Local Authority Review and Assessment purposes page). These were produced using the Scottish-specific model using Scottish monitoring and meteorological data.