London Borough of Barnet Monitoring Data
Barnet Tally Ho (BN1)
Latitude: 51.614675
Longitude: -0.176607
Date Started: 20/12/1998
Longitude: -0.176607
Date Started: 20/12/1998
Inlet Height: 3 metres
Environment: Urban Traffic
Environment: Urban Traffic
Site Comments
Site on land between two carriage ways of busy high street.
Site on land between two carriage ways of busy high street.
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) | 18 µg/m3 (TEOM FDMS) | 24 Hour mean |
| Nitrogen dioxide (NO2) | Low (Index 1) | 27 µg/m3 | hourly mean |
| PM2.5 particulate matter (Hourly measured) | Low (Index 1) | 8 µg/m3 (TEOM FDMS) | 24 Hour mean |
| Nitric oxide (NO) | not applicable | 8 µg/m3 | hourly mean |
| Nitrogen oxides as nitrogen dioxide (NOx as NO2) | not applicable | 39 µg/m3 | hourly mean |
| Non-volatile PM10 (Hourly measured) | not applicable | 17 µg/m3 (TEOM FDMS) | 24 Hour mean |
| Volatile PM10 (Hourly measured) | not applicable | 1 µg/m3 (TEOM FDMS) | 24 Hour mean |
| Non-volatile PM2.5 (Hourly measured) | not applicable | 7 µg/m3 (TEOM FDMS) | 24 Hour mean |
| Volatile PM2.5 (Hourly measured) (Volatile PM2.5) | not applicable | 0 µg/m3 (TEOM FDMS) | 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.