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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 16:00 on Tuesday 27th June 2017

  • Low14
  • Moderate0
  • High0
  • Very High0
  • No Data8
  • 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

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 LOW (Index 1) PM10  27/06/2017 15:00
PM2.5  27/06/2017 15:00
NO2  27/06/2017 11:00
Heathrow LHR2 LOW (Index 2) NO2  27/06/2017 14:00
PM10  27/06/2017 14:00
PM2.5  27/06/2017 14:00
BC  27/06/2017 14:00
Heathrow Oaks Road LOW (Index 1) PM10  27/06/2017 15:00
PM2.5  27/06/2017 15:00
BC  27/06/2017 15:00
NO2  27/06/2017 11:00
Hillingdon 1 - South Ruislip LOW (Index 2) 27/06/2017 11:00
Hillingdon Hayes LOW (Index 2) 27/06/2017 07:00
Hillingdon Sipson LOW (Index 1) 27/06/2017 06:00
Hounslow 2 - Cranford NO DATA 27/06/2017 09:00
Hounslow 4 - Chiswick High Road LOW (Index 2) 27/06/2017 14:00
Hounslow Brentford LOW (Index 2) 27/06/2017 14:00
Hounslow Feltham NO DATA 27/06/2017 10:00
Hounslow Gunnersbury NO DATA 27/06/2017 11:00
Hounslow Hatton Cross NO DATA 27/06/2017 11:00
Hounslow Heston Road NO DATA 27/06/2017 11:00
London Harlington LOW (Index 2) O3  27/06/2017 15:00
NO2  27/06/2017 15:00
PM10  27/06/2017 15:00
PM2.5  27/06/2017 15:00
London Hillingdon LOW (Index 1) 27/06/2017 14:00
London Hillingdon Harmondsworth LOW (Index 2) 27/06/2017 07:00
London Hillingdon Harmondsworth Os LOW (Index 1) 27/06/2017 05:00
London Hillingdon Oxford Avenue LOW (Index 2) 27/06/2017 11:00
Slough Chalvey M4 NO DATA 27/06/2017 08:00
Slough Colnbrook NO DATA 27/06/2017 05:00
Slough Town Centre A4 NO DATA 27/06/2017 08:00
Spelthorne Sunbury Cross LOW (Index 1) 27/06/2017 15:00