London Borough of Hillingdon Monitoring Data

« Return to local authority summary

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: 03/12/2024 15:00

Parameter Pollution Band Concentration Period
PM2.5 particulate matter (Hourly measured) Low (Index 1) 6 µg/m3 (Osiris) 24 Hour mean
PM10 particulate matter (Hourly measured) Low (Index 1) 11 µg/m3 (INDIC GRAV) 24 Hour mean
PM1 Particulates (PM1) not applicable 4 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.

Other monitoring sites

Use the dropdown below to switch to another monitoring site within this local authority.

Map showing the location of the Hillingdon Harmondsworth Osiris monitoring site