London Borough of Hillingdon Monitoring Data

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Hillingdon Harmondsworth Osiris (HIL4)

Latitude: 51.487534
Longitude: -0.479451
Date Started: 01/07/2007
Environment: Urban Background

Latest Data

This monitoring site data was last updated: 21/11/2024 06:00

Parameter Pollution Band Concentration Period
PM2.5 particulate matter (Hourly measured) Low (Index 1) 3 µg/m3 (Osiris) 24 Hour mean
PM10 particulate matter (Hourly measured) Low (Index 1) 5 µg/m3 (INDIC GRAV) 24 Hour mean
PM1 Particulates (PM1) not applicable 2 µg/m3 (Osiris) 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 Hillingdon Harmondsworth Osiris monitoring site