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Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 05:00 on Wednesday 29th November 2023

  • 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 Bath Road NO DATA 29/11/2023 02:00
Heathrow Green Gates LOW (Index 1) PM10  29/11/2023 02:00
PM2.5  29/11/2023 02:00
NO2  29/11/2023 01:00
Heathrow LHR2 LOW (Index 1) PM10  29/11/2023 03:00
PM2.5  29/11/2023 03:00
NO2  29/11/2023 02:00
BC  29/11/2023 02:00
Heathrow Oaks Road LOW (Index 1) PM10  29/11/2023 02:00
PM2.5  29/11/2023 02:00
BC  29/11/2023 02:00
NO2  29/11/2023 01:00
Hillingdon 1 - South Ruislip NO DATA 28/11/2023 23:00
Hillingdon Hayes LOW (Index 1) 29/11/2023 01:00
Hillingdon Sipson LOW (Index 1) 29/11/2023 01:00
Hounslow 4 - Chiswick High Road LOW (Index 1) 29/11/2023 03:00
Hounslow Brentford LOW (Index 2) 29/11/2023 02:00
Hounslow Feltham LOW (Index 1) 29/11/2023 04:00
Hounslow Gunnersbury LOW (Index 2) 29/11/2023 02:00
Hounslow Hatton Cross LOW (Index 1) 28/11/2023 17:00
Hounslow Heston Road LOW (Index 1) 29/11/2023 02:00
London Harlington LOW (Index 1) PM10  29/11/2023 02:00
PM2.5  29/11/2023 02:00
O3  29/11/2023 01:00
NO2  29/11/2023 01:00
London Hillingdon LOW (Index 1) 29/11/2023 05:00
London Hillingdon Harmondsworth LOW (Index 1) 28/11/2023 22:00
London Hillingdon Harmondsworth Os NO DATA 28/11/2023 06:00
London Hillingdon Oxford Avenue NO DATA 12/11/2023 24:00
Slough Brands Hill London Road NO DATA 29/11/2023 01:00
Slough Town Centre Wellington Street NO DATA 29/11/2023 01:00
Slough Windmill Bath Road NO DATA 29/11/2023 01:00
Spelthorne Sunbury Cross NO DATA 29/11/2023 02:00