Diffusion Tubes (NOx) and Air Quality Management Areas 2024

Monthly and annual average NO2 mean concentrations (µg/m3) from diffusion tubes across Cheshire East. NOTE - a figure of zero (0) indicates that there is no data for that month. All raw data is subject to Defra approved bias corrections and distance corrections where applicable. These two corrections are applied to the end of year annual average not the monthly data. As such the annual average will be different from the running average. Air Quality Management Area boundaries are also included on the map.