AURN Monitoring Site Monitoring Data

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Bath A4 Roadside (BHA4, an AURN site)

Latitude: 51.390922
Longitude: -2.355030
Date Started: 24/10/2019
Altitude: 27 metres
Environment: Rural

Latest Data

This monitoring site data was last updated: 08/11/2025 10:00

Parameter Pollution Band Concentration Period
Nitrogen dioxide (NO2) Low (Index 1) 26 µg/m3 hourly mean
Nitric oxide (NO) not applicable 17 µg/m3 hourly mean
Nitrogen oxides as nitrogen dioxide (NOx as NO2) not applicable 53 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.

Map showing the location of the Bath A4 Roadside monitoring site