24 Hour Summary, based on data provided by Environment Agency

Here you can view the detailed data behind the latest measurement summary displayed on UK-AIR, and also a summary of information that has been displayed over the previous 24 hours. The detailed data tabulated below are from monitoring sites within the AURN. Graphs of hourly monitoring data are also available to view as weekly time series. You can also subscribe to this information as an email alert.

  • View the legend
  • Maximum pollutant levels displayed on UK-AIR for the 24 hour period up to 5pm Fri 9th May 2025

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Greater London

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Camden Kerbside
Timeseries Graph
n/m49 (1 Low)n/m12 (2 Low)32 (2 Low)
*1
09/05/2025
16:00:00
Ealing Horn Lane
Timeseries Graph
n/mn/mn/mn/m32 (2 Low)
*1
09/05/2025
14:00:00
Haringey Roadside
Timeseries Graph
n/m26 (1 Low)n/mn/mn/m 09/05/2025
10:00:00
London Bexley
Timeseries Graph
n/m32 (1 Low)n/m9 (1 Low)17 (2 Low)
*2
09/05/2025
12:00:00
London Bloomsbury
Timeseries Graph
80 (3 Low)26 (1 Low)3 (1 Low)8 (1 Low)17 (2 Low)
*2
09/05/2025
10:15:00
London Haringey Priory Park South
Timeseries Graph
88 (3 Low)17 (1 Low)n/m6 (1 Low)13 (1 Low)
*2
09/05/2025
12:00:00
London Harlington
Timeseries Graph
n/a16 (1 Low)n/m8 (1 Low)17 (2 Low)
*2
09/05/2025
10:00:00
London Hillingdon
Timeseries Graph
81 (3 Low)17 (1 Low)n/m7 (1 Low)15 (1 Low)
*2
09/05/2025
13:00:00
London Honor Oak Park
Timeseries Graph
93 (3 Low)n/mn/m7 (1 Low)14 (1 Low)
*2
09/05/2025
12:00:00
London Marylebone Road
Timeseries Graph
72 (3 Low)65 (1 Low)5 (1 Low)9 (1 Low)26 (2 Low)
*1
09/05/2025
12:45:00
London N. Kensington
Timeseries Graph
89 (3 Low)16 (1 Low)1 (1 Low)7 (1 Low)14 (1 Low)
*2
08/05/2025
19:00:00
London Teddington Bushy Park
Timeseries Graph
n/mn/mn/m7 (1 Low)15 (1 Low)
*2
09/05/2025
12:00:00
London Westminster
Timeseries Graph
69 (3 Low)18 (1 Low)n/m8 (1 Low)n/m 09/05/2025
12:00:00
Southwark A2 Old Kent Road
Timeseries Graph
n/m38 (1 Low)n/mn/m30 (2 Low)
*1
09/05/2025
11:00:00

» View the latest regional summary for this region

Legend

  • n/m means that the pollutant is not measured at that site
  • n/a means that no data were recorded for the period
  • *1: measurements are PM10 BAM 1020 heated
  • *2: measurements are PM10 FIDAS
  • *3: measurements are PM10 SEQ 47/50