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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 02:00 on Monday 23rd April 2018

  • Low9
  • Moderate0
  • High0
  • Very High0
  • No Data16
  • 25

    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

Click on a monitoring site from the map above or the text summary below to view the latest data and graphs for the selected site.

Site Summary

Monitoring site Band/Index Last updated
Heathrow Green Gates NO DATA PM10  22/04/2018 21:00
PM2.5  22/04/2018 21:00
NO2  22/04/2018 20:00
Heathrow LHR2 NO DATA PM10  22/04/2018 21:00
PM2.5  22/04/2018 21:00
NO2  22/04/2018 20:00
BC  22/04/2018 20:00
Heathrow Oaks Road NO DATA PM10  22/04/2018 21:00
PM2.5  22/04/2018 21:00
BC  22/04/2018 21:00
NO2  22/04/2018 17:00
Hillingdon 1 - South Ruislip LOW (Index 2) 22/04/2018 19:00
Hillingdon Hayes NO DATA 22/04/2018 07:00
Hillingdon Sipson NO DATA 20/04/2018 11:00
Hounslow 2 - Cranford NO DATA 06/04/2018 05:00
Hounslow 4 - Chiswick High Road NO DATA 22/04/2018 21:00
Hounslow Brentford NO DATA 22/04/2018 21:00
Hounslow Feltham NO DATA 22/04/2018 21:00
Hounslow Gunnersbury NO DATA 22/04/2018 21:00
Hounslow Hatton Cross NO DATA 22/04/2018 20:00
Hounslow Heston Road NO DATA 22/04/2018 21:00
London Harlington NO DATA PM10  22/04/2018 21:00
PM2.5  22/04/2018 21:00
O3  22/04/2018 20:00
NO2  22/04/2018 20:00
London Hillingdon LOW (Index 2) 23/04/2018 01:00
London Hillingdon Harmondsworth LOW (Index 1) 22/04/2018 21:00
London Hillingdon Harmondsworth Os LOW (Index 2) 22/04/2018 06:00
London Hillingdon Oxford Avenue LOW (Index 2) 22/04/2018 20:00
Slough Brands Hill London Road NO DATA 22/04/2018 20:00
Slough Chalvey M4 LOW (Index 1) 22/04/2018 21:00
Slough Colnbrook LOW (Index 3) 22/04/2018 21:00
Slough Town Centre A4 LOW (Index 2) 22/04/2018 21:00
Slough Town Centre Wellington Street NO DATA 22/04/2018 20:00
Slough Windmill Bath Road NO DATA 22/04/2018 20:00
Spelthorne Sunbury Cross NO DATA 22/04/2018 20:00