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Latest air quality summary
Number of monitoring sites in each pollution band
Heathrow Airwatch was last updated at 23:00 on Saturday 23rd February 2019
- Low23
- Moderate3
- High0
- Very High0
- No Data0
- 26
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 Green Gates | LOW (Index 2) | PM10 23/02/2019 23:00 PM2.5 23/02/2019 23:00 NO2 23/02/2019 22:00 |
Heathrow LHR2 | LOW (Index 3) | NO2 23/02/2019 23:00 PM10 23/02/2019 23:00 PM2.5 23/02/2019 23:00 BC 23/02/2019 23:00 |
Heathrow Oaks Road | LOW (Index 3) | PM10 23/02/2019 23:00 PM2.5 23/02/2019 23:00 BC 23/02/2019 23:00 NO2 23/02/2019 22:00 |
Hillingdon 1 - South Ruislip | LOW (Index 3) | 23/02/2019 20:00 |
Hillingdon Hayes | MODERATE (Index 4) | 23/02/2019 23:00 |
Hillingdon Sipson | LOW (Index 1) | 23/02/2019 07:00 |
Hounslow 2 - Cranford | LOW (Index 3) | 23/02/2019 23:00 |
Hounslow 4 - Chiswick High Road | LOW (Index 3) | 23/02/2019 22:00 |
Hounslow Boston Manor Park | LOW (Index 2) | 23/02/2019 23:00 |
Hounslow Brentford | LOW (Index 3) | 23/02/2019 21:00 |
Hounslow Feltham | LOW (Index 3) | 23/02/2019 23:00 |
Hounslow Gunnersbury | LOW (Index 3) | 23/02/2019 23:00 |
Hounslow Hatton Cross | LOW (Index 3) | 23/02/2019 23:00 |
Hounslow Heston Road | LOW (Index 3) | 23/02/2019 23:00 |
London Harlington | LOW (Index 3) | O3 23/02/2019 23:00 NO2 23/02/2019 23:00 PM10 23/02/2019 23:00 PM2.5 23/02/2019 23:00 |
London Hillingdon | LOW (Index 1) | 23/02/2019 22:00 |
London Hillingdon Harmondsworth | LOW (Index 2) | 23/02/2019 22:00 |
London Hillingdon Harmondsworth Os | LOW (Index 2) | 23/02/2019 06:00 |
London Hillingdon Oxford Avenue | LOW (Index 3) | 23/02/2019 23:00 |
Slough Brands Hill London Road | MODERATE (Index 4) | 23/02/2019 23:00 |
Slough Chalvey M4 | LOW (Index 2) | 23/02/2019 23:00 |
Slough Colnbrook | LOW (Index 2) | 23/02/2019 23:00 |
Slough Town Centre A4 | LOW (Index 3) | 23/02/2019 23:00 |
Slough Town Centre Wellington Street | LOW (Index 2) | 23/02/2019 23:00 |
Slough Windmill Bath Road | MODERATE (Index 4) | 23/02/2019 23:00 |
Spelthorne Sunbury Cross | LOW (Index 3) | 23/02/2019 23:00 |