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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 07:00 on Wednesday 24th May 2017

  • Low18
  • Moderate1
  • High1
  • Very High0
  • No Data2
  • 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  24/05/2017 05:00
PM10  24/05/2017 04:00
PM2.5  24/05/2017 04:00
Heathrow LHR2 LOW (Index 1) NO2  24/05/2017 05:00
PM10  24/05/2017 05:00
PM2.5  24/05/2017 05:00
BC  24/05/2017 05:00
Heathrow Oaks Road LOW (Index 1) PM10  24/05/2017 05:00
PM2.5  24/05/2017 05:00
BC  24/05/2017 05:00
NO2  24/05/2017 04:00
Hillingdon 1 - South Ruislip NO DATA 11/05/2017 14:00
Hillingdon Hayes LOW (Index 2) 24/05/2017 02:00
Hillingdon Sipson LOW (Index 1) 24/05/2017 01:00
Hounslow 2 - Cranford LOW (Index 1) 24/05/2017 06:00
Hounslow 4 - Chiswick High Road LOW (Index 2) 24/05/2017 06:00
Hounslow Brentford MODERATE (Index 4) 24/05/2017 06:00
Hounslow Feltham LOW (Index 2) 24/05/2017 05:00
Hounslow Gunnersbury NO DATA 23/05/2017 13:00
Hounslow Hatton Cross HIGH (Index 7) 24/05/2017 06:00
Hounslow Heston Road LOW (Index 2) 24/05/2017 05:00
London Harlington LOW (Index 1) NO2  24/05/2017 05:00
PM10  24/05/2017 04:00
PM2.5  24/05/2017 04:00
O3  04/04/2017 05:00
London Hillingdon LOW (Index 1) 24/05/2017 05:00
London Hillingdon Harmondsworth LOW (Index 1) 24/05/2017 01:00
London Hillingdon Harmondsworth Os LOW (Index 1) 24/05/2017 05:00
London Hillingdon Oxford Avenue LOW (Index 2) 24/05/2017 05:00
Slough Chalvey M4 LOW (Index 1) 24/05/2017 05:00
Slough Colnbrook LOW (Index 2) 24/05/2017 05:00
Slough Town Centre A4 LOW (Index 2) 24/05/2017 05:00
Spelthorne Sunbury Cross LOW (Index 1) 24/05/2017 04:00