London Borough of Hillingdon Monitoring Data
London Harlington (HRL, an AURN site)
Latitude: 51.488790
Longitude: -0.441614
Date Started: 01/01/2004
Longitude: -0.441614
Date Started: 01/01/2004
Altitude: 35 metres
Environment: Airport
Environment: Airport
Latest Data
This monitoring site data was last updated: 29/04/2025 17:00
| Parameter | Pollution Band | Concentration | Period |
|---|---|---|---|
| Ozone (O3) | No Data | 8 Hour mean | |
| PM10 particulate matter (Hourly measured) | Low (Index 2) | 24 µg/m3 (FIDAS) | 24 Hour mean |
| PM2.5 particulate matter (Hourly measured) | Low (Index 2) | 14 µg/m3 (Ref.eq) | 24 Hour mean |
| Nitrogen dioxide (NO2) | Low (Index 1) | 32 µg/m3 | hourly mean |
| Nitric oxide (NO) | not applicable | 9 µg/m3 | hourly mean |
| Nitrogen oxides as nitrogen dioxide (NOx as NO2) | not applicable | 46 µg/m3 | hourly mean |
Note: Values are based on provisional data. Data are GMT hour ending.
PM10 is measured as a running 24 hour mean, up to the current hour, and the band/index is calculated accordingly.
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