London Borough of Hillingdon Monitoring Data
Use the map above to explore the monitoring sites in for this local authority and the surrounding area. The table below shows a summary of sites within this local authority - you can click on the site names to get more detailed information.
Active local authority funded monitoring sites
| Monitoring Site | Ozone (O3) |
Nitrogen Dioxide (NO2) |
Sulphur Dioxide (SO2) |
Particulate Matter (PM2.5) |
Particulate Matter (PM10) |
Highest Pollution Band | Last Updated |
|---|---|---|---|---|---|---|---|
| Heathrow Bath Road | n/m | 45 (1 Low) | n/m | 8 (1 Low) | 16 (1 Low) | Low (Index 1) |
14/07/2025 21:00 |
| Heathrow Green Gates | n/m | n/a | n/m | n/a | n/a | No Data | 13/07/2025 16:00 |
| Heathrow LHR2 | n/m | 59 (1 Low) | n/m | n/a | n/a | Low (Index 1) |
14/07/2025 20:00 |
| Hillingdon Harmondsworth | n/m | 4 (1 Low) | n/m | n/m | 13 (1 Low) | Low (Index 1) |
14/07/2025 13:00 |
| Hillingdon Harmondsworth Osiris | n/m | n/m | n/m | 6 (1 Low) | 13 (1 Low) | Low (Index 1) |
14/07/2025 20:00 |
| Hillingdon Hayes | n/m | 29 (1 Low) | n/m | n/m | 26 (2 Low) | Low (Index 2) |
14/07/2025 20:00 |
| Hillingdon Oxford Avenue | n/m | 60 (1 Low) | n/m | n/m | 24 (2 Low) | Low (Index 2) |
14/07/2025 20:00 |
| Hillingdon Sipson | n/m | n/a | n/m | n/m | n/m | No Data | 12/04/2025 21:00 |
| Hillingdon South Ruislip | n/m | 6 (1 Low) | n/m | n/m | 29 (2 Low) | Low (Index 2) |
14/07/2025 20:00 |
| London Harlington | 61 (2 Low) | 34 (1 Low) | n/m | 7 (1 Low) | 13 (1 Low) | Low (Index 2) |
14/07/2025 21:00 |
| London Hillingdon | 58 (2 Low) | 24 (1 Low) | n/m | 8 (1 Low) | 22 (2 Low) | Low (Index 2) |
14/07/2025 20:00 |
» Visit the Defra UK-AIR website for details of Defra funded AURN monitoring sites
Closed local authority funded monitoring sites
The following monitoring sites are no longer active in this local authority, but you can still access information about them by clicking on their names below.
| Monitoring Site | Date Ended |
|---|---|
| Hillingdon 2 - Hillingdon Hospital [Closed] (HI2) | 30/09/2011 |
LOW ( Index 2)
| Very High | 10 |
| High | 9 |
| 8 | |
| 7 | |
| Moderate | 6 |
| 5 | |
| 4 | |
| Low | 3 |
| 2 | |
| 1 |
Guide to map markers:
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