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<p>Local authorities have a statutory responsibility to review and assess local ambient
air quality, and are responsible for mitigation of air pollution where people are
likely to be exposed. Defra provides guidance and support to local authorities on
monitoring; positioning of monitors is expected to be in line with national and local
priorities.</p><p> </p><p>In addition, Defra’s national network of air quality monitors
currently comprises 272 sites across the UK and is managed by the Environment Agency.
Sites are organised into networks that gather information on a wide range of pollutants
in towns and cities as well as in rural areas. Some monitoring sites are focused on
measuring specific sources, e.g. road traffic or industry whilst others are focused
on background concentrations.</p><p> </p><p>Monitoring data is made available on our
UK-AIR website. Data from the Automatic Urban and Rural Network is reported in near-real-time
and is updated every hour. The website is: <a href="https://uk-air.defra.gov.uk/"
target="_blank">https://uk-air.defra.gov.uk/</a>.</p>
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