London Borough of Westminster Monitoring Data

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Westminster - Covent Garden (WMS05)

Latitude: 51.512090
Longitude: -0.121717
Date Started: 01/04/2026
Inlet Height: 2 metres
Environment: Urban Background

Latest Data

This monitoring site data was last updated: 13/04/2026 10:00

Parameter Pollution Band Concentration Period
Nitrogen dioxide (NO2) Low (Index 1) 15 µg/m3 hourly mean
Nitric oxide (NO) not applicable 2 µg/m3 hourly mean
Nitrogen oxides as nitrogen dioxide (NOx as NO2) not applicable 18 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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Map showing the location of the Westminster - Covent Garden monitoring site