Recent concentrations of nitrogen dioxide are shown in the map below. Dots displayed in yellow or red indicate that the air quality objective is being breached at these locations.
To understand the air quality problem in Bristol, we have collected data from an extensive monitoring network in the city. Bristol City Council monitors NO2 using a combination of automatic and non‐automatic (passive diffusion tube) monitoring.
In Bristol’s recent Annual Status Report for 2017, NO2 concentrations are shown to still be at a similar level to those measured in 2000. Trends in NO2 concentrations have shown some slight improvement over the last 5 years. At some locations in Bristol city centre, annual mean concentrations exceed 60 ug/m3 and widespread locations of exceedance of the annual mean objective for NO2 exist. The highest measured concentrations of NO2 were recorded on Rupert Street, where annual mean NO2 concentrations exceeded 90 µg/m3 in 2015. The city centre NO2 measurements shown in the chart above all exceed the Air Quality Objective. As is shown above, many parts of Bristol, especially near busy roads and in the city centre, NO2 exceeds legal national objectives and European limit values.
For more detailed information on air quality monitoring, please read the Annual Status Report (ASR) published by Bristol City Council.