London Borough of Hounslow
Hounslow Chiswick (HS4)
Latitude: 51.492507
Longitude: -0.257252
Longitude: -0.257252
Date Started: 26/08/1999
Inlet Height: 4 metres
Inlet Height: 4 metres
Latest Data
This monitoring site data was last updated: 22/07/2019 12:00
| Parameter | Pollution Band | Concentration | Period |
|---|---|---|---|
| Nitrogen dioxide (NO2) | Low (Index 1) | 15 µg/m3 | hourly mean |
| PM2.5 particulate matter (Hourly measured) | Low (Index 1) | 7 µg/m3 (BAM) | 24 Hour mean |
| PM10 particulate matter (Hourly measured) | Low (Index 1) | 12 µg/m3 (VCM) | 24 Hour mean |
| Nitric oxide (NO) | not applicable | 13 µg/m3 | hourly mean |
| Nitrogen oxides as nitrogen dioxide (NOx as NO2) | not applicable | 35 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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