London Borough of Waltham Forest Monitoring Data

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Waltham Forest Leyton (WL5)

Latitude: 51.556239
Longitude: -0.013628
Date Started: 20/09/2007
Environment: Urban Background

Latest Data

This monitoring site data was last updated: Sorry, no current data available. The last data date time is: 31/03/2025 17:00

Parameter Pollution Band Concentration Period
PM10 particulate matter (Hourly measured) Low (Index 2) 19 µg/m3 (TEOM FDMS) 24 Hour mean
Nitrogen dioxide (NO2) Low (Index 1) 2 µg/m3 hourly mean
Nitric oxide (NO) not applicable 1 µg/m3 hourly mean
Nitrogen oxides as nitrogen dioxide (NOx as NO2) not applicable 4 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 2 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.

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Map showing the location of the Waltham Forest Leyton monitoring site