AURN Monitoring Site Monitoring Data

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London A406 N Circular (LONC, an AURN site)

Latitude: 51.614224
Longitude: -0.059503
Date Started: 08/01/2026
Altitude: 12 metres
Inlet Height: 2 metres
Environment: Roadside

Latest Data

This monitoring site data was last updated: 22/01/2026 10:00

Parameter Pollution Band Concentration Period
PM2.5 particulate matter (Hourly measured) Low (Index 1) 6 µg/m3 (Ref.eq) 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.

Map showing the location of the London A406 N Circular monitoring site