London Borough of Hillingdon Monitoring Data
Hillingdon Harmondsworth Osiris (HIL4)
Environment: Urban Background
This monitoring site data was last updated: 21/09/2021 05:00
|PM2.5 particulate matter (Hourly measured)||Low (Index 1)||4 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||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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