Borough of Brent

The following charts show how the annual average concentration of NO2 and PM10 have changed since 2009 at AURN reference stations in the Borough of Brent.  The trend in NO2 is unclear but probably downwards.  In contrast, concentrations of PM10 are clearly rising.

Source: based on

Source: based on

The following three charts illustrate trends in average annual concentrations of NO2 measured with diffusion tubes around the borough.  Concentrations at most sites shown on the uppermost and lowermost charts have tended to increase since the beginning of this decade.  The trend at sites shown on the middle chart is unclear or rising.

Source:  based on Borough of Brent



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