City of London Corporation Monitoring Data

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Guildhall (CT9)

Latitude: 51.516212
Longitude: -0.092238
Date Started: 25/03/2022
Inlet Height: 25 metres
Environment: Urban Background

Latest Data

This monitoring site data was last updated: 21/11/2024 07:00

Parameter Pollution Band Concentration Period
Ozone (O3) Low (Index 1) 23 µg/m3 8 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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Map showing the location of the Guildhall monitoring site