Air Quality Monitoring - NO2 Diffusion Tube Data 2020

Monthly and annual averages for the calendar year 2020 of NO2 mean concentrations (µg/m3) from diffusion tubes across Cheshire East. Each year the levels at each site (tube) are reviewed. A total of 35 sites were removed between 2019 and 2020, there will be no data past February 2020 for these sites. A number of new sites were added in 2020, some sites commence recording data in April 2020. There are no results for the month of May due to the laboratory being unable to supply new tubes during a period of Covid-19 related closure. 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.