South Oxfordshire District Council Monitoring Data
SODC Henley Duke St (HEN)
Latitude: 51.536552
Longitude: -0.903958
Date Started: 01/12/2006
Longitude: -0.903958
Date Started: 01/12/2006
Altitude: 40 metres
Inlet Height: 1.6 metres
Environment: Urban Traffic
Inlet Height: 1.6 metres
Environment: Urban Traffic
Latest Data
This monitoring site data was last updated: 31/10/2025 17:00
| Parameter | Pollution Band | Concentration | Period |
|---|---|---|---|
| Nitrogen dioxide (NO2) | Low (Index 1) | 5 µg/m3 | hourly mean |
| Nitric oxide (NO) | not applicable | 2 µg/m3 | hourly mean |
| Nitrogen oxides as nitrogen dioxide (NOx as NO2) | not applicable | 8 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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