London Borough of Hillingdon Monitoring Data
London Hillingdon (HIL, an AURN site)
Date Started: 02/08/1996
Environment: Urban Background
This monitoring site data was last updated: Sorry, no current data available. The last data date time is: 28/02/2021 24:00
|Ozone (O3)||Low (Index 2)||35 µg/m3||8 Hour mean|
|Nitrogen dioxide (NO2)||Low (Index 1)||25 µg/m3||hourly mean|
|Nitric oxide (NO)||not applicable||1 µg/m3||hourly mean|
|Nitrogen oxides as nitrogen dioxide (NOx as NO2)||not applicable||27 µg/m3||hourly 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.