Under the Environment Act 1995 the National Air Quality Strategy outlines recommended maximum levels of eight pollutants.
These eight pollutants are:
The maximum levels have been devised by the Expert Panel on Air Quality Standards (EPAQS) based on medical and scientific evidence. The most important pollutant for the borough is Nitrogen Dioxide (NO2) which is associated with vehicles.
Within the National Air Quality Strategy all local authorities have to assess the present and future air quality of their area in relation to the requirements of the National Air Quality Strategy and identify the main sources of the pollutants affecting air quality.