London Borough of Hillingdon Monitoring Data
Heathrow LHR2 (LHR2)
Latitude: 51.479167
Longitude: -0.440556
Date Started: 01/01/1993
Longitude: -0.440556
Date Started: 01/01/1993
Altitude: 26 metres
Environment: Suburban Industrial
Environment: Suburban Industrial
Latest Data
This monitoring site data was last updated: 31/03/2025 09:00
| Parameter | Pollution Band | Concentration | Period |
|---|---|---|---|
| PM10 particulate matter (Hourly measured) | Low (Index 2) | 20 µg/m3 (FIDAS) | 24 Hour mean |
| Nitrogen dioxide (NO2) | Low (Index 1) | 33 µg/m3 | hourly mean |
| PM2.5 particulate matter (Hourly measured) | Low (Index 1) | 9 µg/m3 (Ref.eq) | 24 Hour mean |
| Nitric oxide (NO) | not applicable | 18 µg/m3 | hourly mean |
| Nitrogen oxides as nitrogen dioxide (NOx as NO2) | not applicable | 61 µg/m3 | hourly mean |
| PM1 Particulates (PM1) | not applicable | 5 µg/m3 (FIDAS) | 24 Hour 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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