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Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 17:00 on Saturday 21st May 2022
- Low21
- Moderate0
- High0
- Very High0
- No Data1
- 22
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 1) | 21/05/2022 16:00 |
| Heathrow Green Gates | LOW (Index 1) | PM10 21/05/2022 16:00 PM2.5 21/05/2022 16:00 NO2 21/05/2022 15:00 |
| Heathrow LHR2 | LOW (Index 1) | NO2 21/05/2022 15:00 PM10 21/05/2022 15:00 PM2.5 21/05/2022 15:00 BC 21/05/2022 15:00 |
| Heathrow Oaks Road | LOW (Index 1) | PM10 21/05/2022 16:00 PM2.5 21/05/2022 16:00 BC 21/05/2022 16:00 NO2 21/05/2022 15:00 |
| Hillingdon 1 - South Ruislip | LOW (Index 1) | 21/05/2022 15:00 |
| Hillingdon Hayes | LOW (Index 2) | 21/05/2022 06:00 |
| Hillingdon Sipson | LOW (Index 1) | 21/05/2022 06:00 |
| Hounslow 4 - Chiswick High Road | LOW (Index 1) | 21/05/2022 15:00 |
| Hounslow Brentford | LOW (Index 2) | 21/05/2022 15:00 |
| Hounslow Feltham | LOW (Index 1) | 21/05/2022 16:00 |
| Hounslow Gunnersbury | LOW (Index 2) | 21/05/2022 15:00 |
| Hounslow Hatton Cross | LOW (Index 1) | 21/05/2022 16:00 |
| Hounslow Heston Road | LOW (Index 2) | 21/05/2022 15:00 |
| London Harlington | LOW (Index 3) | PM10 21/05/2022 16:00 PM2.5 21/05/2022 16:00 O3 21/05/2022 15:00 NO2 21/05/2022 15:00 |
| London Hillingdon | LOW (Index 2) | 21/05/2022 15:00 |
| London Hillingdon Harmondsworth | LOW (Index 1) | 21/05/2022 13:00 |
| London Hillingdon Harmondsworth Os | NO DATA | 20/05/2022 01:00 |
| London Hillingdon Oxford Avenue | LOW (Index 1) | 21/05/2022 15:00 |
| Slough Brands Hill London Road | LOW (Index 1) | 21/05/2022 15:00 |
| Slough Town Centre Wellington Street | LOW (Index 1) | 21/05/2022 15:00 |
| Slough Windmill Bath Road | LOW (Index 1) | 21/05/2022 15:00 |
| Spelthorne Sunbury Cross | LOW (Index 1) | 21/05/2022 16:00 |
