| answer text |
<p>Assessment of PM<sub>2.5 </sub>levels in the UK uses direct monitoring alongside
air quality modelling. We have a network comprising 163 direct monitoring sites providing
near-real-time data to our UK-AIR website: <a href="https://uk-air.defra.gov.uk/"
target="_blank">https://uk-air.defra.gov.uk</a>. Of these, 77 monitor PM<sub>2.5.</sub>
Modelling of PM<sub>2.5</sub> is reviewed regularly to take account of changes in
sources of emissions to ensure accurate measurement.</p><p> </p><p>Defra provides
technical and policy guidance to local authorities to assist them in meeting their
air quality management responsibilities including air quality monitoring and assessment.
Defra also provides technical support to local authorities via a dedicated local air
quality management Helpdesk (phone, email and webpage).</p>
|
 |
