AURN Monitoring Site Monitoring Data
London Marylebone Road (MY1, an AURN site)
Date Started: 01/01/1997
Inlet Height: 3.5 metres
This monitoring site data was last updated: 09/12/2023 12:00
|Ozone (O3)||Low (Index 2)||34 µg/m3||8 Hour mean|
|PM10 particulate matter (Hourly measured)||Low (Index 2)||25 µg/m3 (Ref.eq)||24 Hour mean|
|Sulphur dioxide (SO2)||Low (Index 1)||2 µg/m3||15 Minute mean|
|Nitrogen dioxide (NO2)||Low (Index 1)||46 µg/m3||hourly mean|
|PM2.5 particulate matter (Hourly measured)||Low (Index 1)||11 µg/m3 (BAM)||24 Hour mean|
|Nitric oxide (NO)||not applicable||34 µg/m3||hourly mean|
|Nitrogen oxides as nitrogen dioxide (NOx as NO2)||not applicable||98 µg/m3||hourly mean|
|Carbon monoxide (CO)||not applicable||0.1 mg/m3||8 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.