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Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 12:00 on Thursday 4th March 2021
- Low22
- Moderate1
- High0
- Very High0
- No Data2
- 25
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 | 23/03/2020 24:00 |
Heathrow Green Gates | LOW (Index 3) | NO2 04/03/2021 12:00 PM10 04/03/2021 12:00 PM2.5 04/03/2021 12:00 |
Heathrow LHR2 | LOW (Index 3) | NO2 04/03/2021 12:00 PM10 04/03/2021 12:00 PM2.5 04/03/2021 12:00 BC 04/03/2021 12:00 |
Heathrow Oaks Road | LOW (Index 3) | NO2 04/03/2021 12:00 PM10 04/03/2021 12:00 PM2.5 04/03/2021 12:00 BC 04/03/2021 12:00 |
Hillingdon 1 - South Ruislip | LOW (Index 3) | 04/03/2021 12:00 |
Hillingdon Hayes | LOW (Index 3) | 04/03/2021 07:00 |
Hillingdon Sipson | LOW (Index 1) | 04/03/2021 07:00 |
Hounslow 2 - Cranford | NO DATA | 08/04/2020 19:00 |
Hounslow 4 - Chiswick High Road | LOW (Index 3) | 04/03/2021 12:00 |
Hounslow Brentford | MODERATE (Index 4) | 04/03/2021 12:00 |
Hounslow Feltham | LOW (Index 2) | 04/03/2021 12:00 |
Hounslow Gunnersbury | LOW (Index 2) | 04/03/2021 12:00 |
Hounslow Hatton Cross | LOW (Index 3) | 04/03/2021 12:00 |
Hounslow Heston Road | LOW (Index 2) | 04/03/2021 12:00 |
London Harlington | LOW (Index 3) | O3 04/03/2021 12:00 NO2 04/03/2021 12:00 PM10 04/03/2021 12:00 PM2.5 04/03/2021 12:00 |
London Hillingdon | LOW (Index 2) | 04/03/2021 12:00 |
London Hillingdon Harmondsworth | LOW (Index 3) | 04/03/2021 07:00 |
London Hillingdon Harmondsworth Os | LOW (Index 3) | 04/03/2021 06:00 |
London Hillingdon Oxford Avenue | LOW (Index 3) | 04/03/2021 12:00 |
Slough Brands Hill London Road | LOW (Index 3) | 04/03/2021 12:00 |
Slough Chalvey M4 | LOW (Index 1) | 04/03/2021 12:00 |
Slough Colnbrook | LOW (Index 3) | 04/03/2021 12:00 |
Slough Town Centre Wellington Street | LOW (Index 1) | 04/03/2021 12:00 |
Slough Windmill Bath Road | LOW (Index 3) | 04/03/2021 12:00 |
Spelthorne Sunbury Cross | LOW (Index 3) | 04/03/2021 12:00 |