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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 Saturday 21st May 2022

  • 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

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 Bath Road LOW (Index 1) 21/05/2022 16:00
Heathrow Green Gates LOW (Index 1) PM10  21/05/2022 16:00
PM2.5  21/05/2022 16:00
NO2  21/05/2022 15:00
Heathrow LHR2 LOW (Index 1) NO2  21/05/2022 15:00
PM10  21/05/2022 15:00
PM2.5  21/05/2022 15:00
BC  21/05/2022 15:00
Heathrow Oaks Road LOW (Index 1) PM10  21/05/2022 16:00
PM2.5  21/05/2022 16:00
BC  21/05/2022 16:00
NO2  21/05/2022 15:00
Hillingdon 1 - South Ruislip LOW (Index 1) 21/05/2022 15:00
Hillingdon Hayes LOW (Index 2) 21/05/2022 06:00
Hillingdon Sipson LOW (Index 1) 21/05/2022 06:00
Hounslow 4 - Chiswick High Road LOW (Index 1) 21/05/2022 15:00
Hounslow Brentford LOW (Index 2) 21/05/2022 15:00
Hounslow Feltham LOW (Index 1) 21/05/2022 16:00
Hounslow Gunnersbury LOW (Index 2) 21/05/2022 15:00
Hounslow Hatton Cross LOW (Index 1) 21/05/2022 16:00
Hounslow Heston Road LOW (Index 2) 21/05/2022 15:00
London Harlington LOW (Index 3) PM10  21/05/2022 16:00
PM2.5  21/05/2022 16:00
O3  21/05/2022 15:00
NO2  21/05/2022 15:00
London Hillingdon LOW (Index 2) 21/05/2022 15:00
London Hillingdon Harmondsworth LOW (Index 1) 21/05/2022 13:00
London Hillingdon Harmondsworth Os NO DATA 20/05/2022 01:00
London Hillingdon Oxford Avenue LOW (Index 1) 21/05/2022 15:00
Slough Brands Hill London Road LOW (Index 1) 21/05/2022 15:00
Slough Town Centre Wellington Street LOW (Index 1) 21/05/2022 15:00
Slough Windmill Bath Road LOW (Index 1) 21/05/2022 15:00
Spelthorne Sunbury Cross LOW (Index 1) 21/05/2022 16:00