A domain of the Access to Health Assets and Hazards (AHAH) multi-dimensional index developed by the CDRC for Great Britain measuring how ‘healthy’ neighbourhoods are. This data is taken from Version 2 of the AHAH, which is an updated version of AHAH Version 1 and combines together indicators under four different domains of accessibility. The data provided here is from the air quality domain and includes information of levels of Nitrogen Dioxide, Particulate Matter 10, Sulphur Dioxide pollutants by LSOA. Note: The data includes the original national ranks and deciles, but also recalculated ranks and deciles relative to Birmingham only.