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Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 22:00 on Tuesday 19th October 2021
- Low23
- Moderate0
- High0
- Very High0
- No Data2
- 25
Total monitoring sites
Low (1-3)
Moderate (4-6)
High (7-9)
Very High (10)
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 2) | 19/10/2021 21:00 |
| Heathrow Green Gates | LOW (Index 2) | NO2 19/10/2021 21:00 PM10 19/10/2021 21:00 PM2.5 19/10/2021 21:00 |
| Heathrow LHR2 | LOW (Index 1) | NO2 19/10/2021 21:00 PM10 19/10/2021 21:00 PM2.5 19/10/2021 21:00 BC 19/10/2021 21:00 |
| Heathrow Oaks Road | LOW (Index 2) | NO2 19/10/2021 21:00 PM10 19/10/2021 21:00 PM2.5 19/10/2021 21:00 BC 19/10/2021 21:00 |
| Hillingdon 1 - South Ruislip | LOW (Index 2) | 19/10/2021 21:00 |
| Hillingdon Hayes | LOW (Index 1) | 19/10/2021 06:00 |
| Hillingdon Sipson | LOW (Index 1) | 19/10/2021 06:00 |
| Hounslow 2 - Cranford | NO DATA | 08/04/2020 19:00 |
| Hounslow 4 - Chiswick High Road | LOW (Index 3) | 19/10/2021 21:00 |
| Hounslow Brentford | NO DATA | 19/10/2021 17:00 |
| Hounslow Feltham | LOW (Index 2) | 19/10/2021 21:00 |
| Hounslow Gunnersbury | LOW (Index 2) | 19/10/2021 21:00 |
| Hounslow Hatton Cross | LOW (Index 1) | 19/10/2021 21:00 |
| Hounslow Heston Road | LOW (Index 2) | 19/10/2021 21:00 |
| London Harlington | LOW (Index 2) | O3 19/10/2021 21:00 NO2 19/10/2021 21:00 PM10 19/10/2021 21:00 PM2.5 19/10/2021 21:00 |
| London Hillingdon | LOW (Index 2) | 19/10/2021 21:00 |
| London Hillingdon Harmondsworth | LOW (Index 2) | 19/10/2021 21:00 |
| London Hillingdon Harmondsworth Os | LOW (Index 1) | 19/10/2021 05:00 |
| London Hillingdon Oxford Avenue | NO DATA | 19/10/2021 14:00 |
| Slough Brands Hill London Road | LOW (Index 2) | 19/10/2021 21:00 |
| Slough Chalvey M4 | LOW (Index 1) | 19/10/2021 18:00 |
| Slough Colnbrook | LOW (Index 2) | 19/10/2021 18:00 |
| Slough Town Centre Wellington Street | LOW (Index 1) | 19/10/2021 21:00 |
| Slough Windmill Bath Road | LOW (Index 1) | 19/10/2021 21:00 |
| Spelthorne Sunbury Cross | LOW (Index 2) | 19/10/2021 21:00 |
