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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 10:00 on Thursday 28th March 2024

  • Low21
  • Moderate0
  • High0
  • Very High0
  • No Data1
  • 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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Slough Colnbrook

Sorry, no data are available for this monitoring site on the date selected

Note: These results are based on provisional data. The data are presented in graphical form based on the highest pollutant measured at each site.