Latest measured levels based on data provided by the 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
  • Pollutant levels recorded for the hour up to 5am Sat 24th May 2025

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South East

Latest measured levels based on data provided by the 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
Brighton Preston Park
Timeseries Graph
60 (2 Low)6 (1 Low)n/m7 (1 Low)13 (1 Low)
*2
24/05/2025
05:00:00
Chatham Roadside
Timeseries Graph
n/m9 (1 Low)n/m6 (1 Low)24 (2 Low)
*1
24/05/2025
05:00:00
Chilbolton Observatory
Timeseries Graph
71 (3 Low)3 (1 Low)1 (1 Low)9 (1 Low)13 (1 Low)
*2
24/05/2025
05:00:00
Eastbourne
Timeseries Graph
75 (3 Low)3 (1 Low)n/m6 (1 Low)10 (1 Low)
*2
24/05/2025
05:00:00
Farnborough Cherrywood
Timeseries Graph
n/mn/mn/m8 (1 Low)13 (1 Low)
*2
24/05/2025
05:00:00
Horley
Timeseries Graph
n/m14 (1 Low)n/mn/an/a 24/05/2025
05:00:00
Lullington Heath
Timeseries Graph
80 (3 Low)4 (1 Low)1 (1 Low)7 (1 Low)11 (1 Low)
*2
24/05/2025
05:00:00
Maidstone Upper Stone Street
Timeseries Graph
n/mn/mn/mn/an/a 23/05/2025
16:00:00
Milton Keynes Civic Centre
Timeseries Graph
76 (3 Low)n/mn/m6 (1 Low)12 (1 Low)
*2
24/05/2025
05:00:00
Oxford Centre Roadside
Timeseries Graph
n/m2 (1 Low)n/mn/mn/m 24/05/2025
05:00:00
Oxford St Ebbes
Timeseries Graph
64 (2 Low)3 (1 Low)n/m6 (1 Low)11 (1 Low)
*2
24/05/2025
05:00:00
Portsmouth
Timeseries Graph
73 (3 Low)6 (1 Low)n/m8 (1 Low)14 (1 Low)
*2
24/05/2025
05:00:00
Portsmouth Anglesea Road
Timeseries Graph
n/m12 (1 Low)n/m8 (1 Low)14 (1 Low)
*2
24/05/2025
05:00:00
Reading London Road
Timeseries Graph
n/m3 (1 Low)n/mn/m19 (2 Low)
*1
24/05/2025
05:00:00
Reading New Town
Timeseries Graph
61 (2 Low)3 (1 Low)n/m8 (1 Low)13 (1 Low)
*2
24/05/2025
05:00:00
Reading Rose Kiln Lane
Timeseries Graph
n/mn/mn/m8 (1 Low)n/m 24/05/2025
05:00:00
Rochester Stoke
Timeseries Graph
74 (3 Low)6 (1 Low)2 (1 Low)8 (1 Low)15 (1 Low)
*2
24/05/2025
05:00:00
Slough Windmill Bath Road
Timeseries Graph
n/mn/mn/m9 (1 Low)17 (2 Low)
*2
24/05/2025
05:00:00
Southampton A33
Timeseries Graph
n/m5 (1 Low)n/m9 (1 Low)19 (2 Low)
*2
24/05/2025
05:00:00
Southampton Centre
Timeseries Graph
59 (2 Low)9 (1 Low)0 (1 Low)9 (1 Low)16 (1 Low)
*2
24/05/2025
05:00:00
Storrington Roadside
Timeseries Graph
n/m2 (1 Low)n/m8 (1 Low)14 (1 Low)
*2
24/05/2025
05:00:00
Worthing A27 Roadside
Timeseries Graph
n/m4 (1 Low)n/m10 (1 Low)n/m 24/05/2025
05:00:00
Worthing East Ten Acres
Timeseries Graph
n/mn/mn/m8 (1 Low)14 (1 Low)
*2
24/05/2025
05:00:00

» 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