Location Of NO2 Diffusion Tubes

NO2 Diffusion Tubes are changed and measured on a calendar set by Defra to standardise the ambient NO2 submissions from Local Authorities on the Defra Data Entry System. This system is provided as part of the Defra Local Authority Air Quality Support programme, for the use of UK Local Authorities using NO2 diffusion tubes for Local Air Quality Monitoring purposes. Local Authorities should keep a record of site irregularities that may occur in monitoring, for example, building work, changes in traffic flow, etc. This information may be helpful in explaining any unusual results. 2014:05:02T16:00:00.