Air Quality Monitoring NO2 Diffusion Tube Data 2021

Monthly and annual averages for the calendar year 2021 of NO2 mean concentrations (µg/m3) from diffusion tubes across Cheshire East. Each year the levels at each site (tube) are reviewed. For 2021, seven former AQMAs were revoked; Earle Street (Crewe), Nantwich Road (Crewe), Wistaston Road (Crewe), A50 Manchester Road (Knutsford), A556 (Mere), Park Lane (Macclesfield), and Middlewich Road (Sandbach). From February 2021, the 109 tubes will reduce to 91 as some sites were removed at the end of January due to the revocation of the seven AQMAs and/or due to three or more years below the annual objective. One new site was added in March 2021. For more information, please view the Air Quality story . 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 displayed here.