The following chart shows how the annual average concentration of NO2 changed since 2018 at sites being monitored long-term in the Borough of Newham.  At most sites (and all sites for the most recent period), the trend is downards.  Concentrations at four of the sites exceed the UK legal limit.  The lowest concentration is double the WHO guideline.

Source:  based on “Air Quality Annual Status Reports" Borough of Newham 
Raw data not adjusted for bias. The numbers in the legend refer to the numbers in the AQASRs

The chart below shows how the annual average concentration of NO2 changed since mid-2020 at sites adjacent schools in Newham.  At most sites, the  trend was flat.  At sites where NO2 concentrations were greatest, the trend for much of the period shown was rising.  The trend for the most recent period is downards at almost all sites - no data for 2024.  Concentrations exceeded the legal limit adjacent one school and are generally between two and three times greater than the WHO guideline.

Source:  based on “Air Quality Annual Status Reports" Borough of Newham 
Raw data not adjusted for bias. The numbers in the legend refer to the number shown in the source.

The chart below shows how the annual average concentration of NO2 changed since 2019 at sites adjacent London City Airport.  There is no data for 2023.  Between 2020 and 2025, concentrations have tended to decline slowly.   
Source:  based on “Air Quality Annual Status Reports" Borough of Newham 
Raw data not adjusted for bias. The numbers in the legend refer to the number shown in the source.

The following two charts show trends in the concentration of nitrogen dioxide and particulate matter PM10 in Newham as measured automatically at government reference sites over the last few years.

Source:  based on London Air and Air Quality England