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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 17:00 on Thursday 23rd March 2017

  • 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

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) NO2  23/03/2017 17:00
PM10  23/03/2017 16:00
PM2.5  23/03/2017 16:00
Heathrow LHR2 LOW (Index 2) NO2  23/03/2017 17:00
PM10  23/03/2017 17:00
PM2.5  23/03/2017 17:00
BC  23/03/2017 17:00
Heathrow Oaks Road LOW (Index 2) NO2  23/03/2017 17:00
PM10  23/03/2017 16:00
PM2.5  23/03/2017 16:00
BC  23/03/2017 16:00
Hillingdon 1 - South Ruislip LOW (Index 2) 23/03/2017 17:00
Hillingdon Hayes LOW (Index 2) 23/03/2017 08:00
Hillingdon Sipson LOW (Index 1) 23/03/2017 07:00
Hounslow 2 - Cranford LOW (Index 2) 23/03/2017 17:00
Hounslow 4 - Chiswick High Road LOW (Index 2) 23/03/2017 17:00
Hounslow Brentford LOW (Index 3) 23/03/2017 17:00
Hounslow Feltham LOW (Index 2) 23/03/2017 17:00
Hounslow Gunnersbury LOW (Index 3) 23/03/2017 17:00
Hounslow Hatton Cross LOW (Index 2) 23/03/2017 17:00
Hounslow Heston Road LOW (Index 2) 23/03/2017 17:00
London Harlington LOW (Index 2) O3  23/03/2017 17:00
NO2  23/03/2017 17:00
PM10  23/03/2017 16:00
PM2.5  23/03/2017 16:00
London Hillingdon LOW (Index 2) 23/03/2017 17:00
London Hillingdon Harmondsworth LOW (Index 2) 23/03/2017 15:00
London Hillingdon Harmondsworth Os LOW (Index 1) 23/03/2017 06:00
London Hillingdon Oxford Avenue LOW (Index 2) 23/03/2017 17:00
Slough Chalvey M4 LOW (Index 1) 23/03/2017 17:00
Slough Colnbrook LOW (Index 2) 23/03/2017 17:00
Slough Town Centre A4 LOW (Index 2) 23/03/2017 17:00
Spelthorne Sunbury Cross LOW (Index 1) 23/03/2017 16:00