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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 14:00 on Friday 26th April 2024

  • Low22
  • Moderate0
  • High0
  • Very High0
  • No Data0
  • 22

    Total monitoring sites

Green Low (1-3) Orange Moderate (4-6) Red High (7-9) Purple Very High (10)
Grey Offline | Find out more about the air pollution index and bandings

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London Hillingdon Harmondsworth Os

The photo for this monitoring site is shown below, if available.

Site photo for this monitoring site