General FAQs

Click on the links below to view the full question and answers.

  • What was the effect of the 2010 Icelandic volcano ash cloud on air quality in the UK?

  • Where can I find old reports and guidance published by Defra?

  • How effective are air quality regulations?

  • Where can I find more information about Smoke Control Zones?

  • What are the limits for emissions of pollutants into the atmosphere?

  • How does the UK determine the number of sites required for monitoring? Is there a map or list available?

  • Which part of the United Kingdom has the best air quality?

  • What defines a pollution episode and when was the first official episode?

  • How can refineries reduce their emissions?