London Borough of Hillingdon Monitoring Data
Hillingdon Harmondsworth Osiris (HIL4)
Environment: Urban Background
This monitoring site data was last updated: 09/12/2023 01:00
|PM10 particulate matter (Hourly measured)||Low (Index 3)||37 µg/m3 (INDIC GRAV)||24 Hour mean|
|PM2.5 particulate matter (Hourly measured)||Low (Index 2)||16 µg/m3 (Osiris)||24 Hour mean|
|PM1 Particulates (PM1)||not applicable||7 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.