This is a monthly summary report to provide rolling annual mean concentrations for NO2, PM10 and PM2.5 across all sites in the London Borough of Hounslow air quality monitoring network. The information indicates whether measured levels are increasing or decreasing, with respect to the previous month.
Note - the concentrations provided in this report include provisional data, and are subject to change.
Figure 1 below show the average rolling annual mean of NO2, PM10 and PM2.5 across all sites, calculated based on the preceeding 12 months.
The table below provides the changes in concentration for the most recent complete month, when compared to its previous month for NO2, PM10 and PM2.5. The concentrations for May 2021 are coloured according to whether these values have gone up, down, or remained the same, with respect to the previous month.
|Pollutant||Apr 2021||May 2021|