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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





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 |