Heathrow Airwatch uses cookies to make the site simpler. Find out more about this

Latest air quality summary

Number of monitoring sites in each pollution band

Heathrow Airwatch was last updated at 11:00 on Wednesday 11th September 2024

  • 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) 11/09/2024 10:00
Heathrow Green Gates LOW (Index 1) PM10  11/09/2024 10:00
PM2.5  11/09/2024 10:00
NO2  11/09/2024 09:00
Heathrow LHR2 LOW (Index 1) NO2  11/09/2024 10:00
PM10  11/09/2024 10:00
PM2.5  11/09/2024 10:00
BC  11/09/2024 10:00
Heathrow Oaks Road LOW (Index 1) PM10  11/09/2024 10:00
PM2.5  11/09/2024 10:00
BC  11/09/2024 10:00
NO2  11/09/2024 09:00
Hillingdon 1 - South Ruislip LOW (Index 1) 11/09/2024 10:00
Hillingdon Hayes LOW (Index 1) 11/09/2024 10:00
Hillingdon Sipson LOW (Index 1) 11/09/2024 10:00
Hounslow 4 - Chiswick High Road LOW (Index 1) 11/09/2024 09:00
Hounslow Brentford LOW (Index 2) 11/09/2024 10:00
Hounslow Feltham LOW (Index 1) 11/09/2024 10:00
Hounslow Gunnersbury LOW (Index 2) 11/09/2024 10:00
Hounslow Hatton Cross LOW (Index 2) 11/09/2024 06:00
Hounslow Heston Road LOW (Index 1) 11/09/2024 10:00
London Harlington LOW (Index 2) O3  11/09/2024 10:00
NO2  11/09/2024 10:00
PM10  11/09/2024 10:00
PM2.5  11/09/2024 10:00
London Hillingdon LOW (Index 1) 11/09/2024 10:00
London Hillingdon Harmondsworth NO DATA 06/09/2024 09:00
London Hillingdon Harmondsworth Os LOW (Index 1) 11/09/2024 05:00
London Hillingdon Oxford Avenue LOW (Index 1) 11/09/2024 10:00
Slough Brands Hill London Road LOW (Index 2) 11/09/2024 09:00
Slough Town Centre Wellington Street LOW (Index 1) 11/09/2024 10:00
Slough Windmill Bath Road LOW (Index 1) 11/09/2024 10:00
Spelthorne Sunbury Cross NO DATA 25/06/2024 15:00