London Borough of Hillingdon Monitoring Data
Hillingdon Hayes (HIL5)
Date Started: 21/04/2008
Environment: Urban Traffic
This monitoring site data was last updated: 25/10/2020 07:00
|Nitrogen dioxide (NO2)||Low (Index 1)||20 µg/m3||hourly mean|
|PM10 particulate matter (Hourly measured)||Low (Index 1)||11 µg/m3 (Ref.eq)||24 Hour mean|
|Nitric oxide (NO)||not applicable||8 µg/m3||hourly mean|
|Nitrogen oxides as nitrogen dioxide (NOx as NO2)||not applicable||32 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.
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