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.

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  • Pollutant levels recorded for the hour up to 11pm Fri 18th Jul 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
48 (2 Low)11 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
18/07/2025
23:00:00
Chatham Roadside
Timeseries Graph
n/m10 (1 Low)n/m2 (1 Low)10 (1 Low)
*1
18/07/2025
23:00:00
Chilbolton Observatory
Timeseries Graph
61 (2 Low)5 (1 Low)1 (1 Low)5 (1 Low)19 (2 Low)
*2
18/07/2025
23:00:00
Eastbourne
Timeseries Graph
60 (2 Low)4 (1 Low)n/m2 (1 Low)4 (1 Low)
*2
18/07/2025
23:00:00
Farnborough Cherrywood
Timeseries Graph
n/mn/mn/m4 (1 Low)7 (1 Low)
*2
18/07/2025
23:00:00
Horley
Timeseries Graph
n/m31 (1 Low)n/m5 (1 Low)8 (1 Low)
*2
18/07/2025
23:00:00
Lullington Heath
Timeseries Graph
56 (2 Low)7 (1 Low)1 (1 Low)2 (1 Low)4 (1 Low)
*2
18/07/2025
23:00:00
Maidstone Upper Stone Street
Timeseries Graph
n/mn/mn/m4 (1 Low)7 (1 Low)
*2
18/07/2025
23:00:00
Milton Keynes Civic Centre
Timeseries Graph
59 (2 Low)n/mn/m3 (1 Low)6 (1 Low)
*2
18/07/2025
23:00:00
Oxford Centre Roadside
Timeseries Graph
n/m26 (1 Low)n/mn/mn/m 18/07/2025
23:00:00
Oxford St Ebbes
Timeseries Graph
47 (2 Low)26 (1 Low)n/m3 (1 Low)5 (1 Low)
*2
18/07/2025
23:00:00
Portsmouth
Timeseries Graph
50 (2 Low)n/an/m4 (1 Low)8 (1 Low)
*2
18/07/2025
23:00:00
Portsmouth Anglesea Road
Timeseries Graph
n/m31 (1 Low)n/m4 (1 Low)7 (1 Low)
*2
18/07/2025
23:00:00
Reading London Road
Timeseries Graph
n/m14 (1 Low)n/mn/m15 (1 Low)
*1
18/07/2025
23:00:00
Reading New Town
Timeseries Graph
57 (2 Low)17 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
18/07/2025
23:00:00
Reading Rose Kiln Lane
Timeseries Graph
n/mn/mn/m3 (1 Low)n/m 18/07/2025
23:00:00
Rochester Stoke
Timeseries Graph
63 (2 Low)13 (1 Low)2 (1 Low)4 (1 Low)9 (1 Low)
*2
18/07/2025
23:00:00
Slough Windmill Bath Road
Timeseries Graph
n/mn/mn/m5 (1 Low)10 (1 Low)
*2
18/07/2025
23:00:00
Southampton A33
Timeseries Graph
n/m17 (1 Low)n/m5 (1 Low)10 (1 Low)
*2
18/07/2025
23:00:00
Southampton Centre
Timeseries Graph
45 (2 Low)17 (1 Low)1 (1 Low)5 (1 Low)8 (1 Low)
*2
18/07/2025
23:00:00
Storrington Roadside
Timeseries Graph
n/m17 (1 Low)n/m5 (1 Low)10 (1 Low)
*2
18/07/2025
23:00:00
Worthing A27 Roadside
Timeseries Graph
n/m21 (1 Low)n/m4 (1 Low)n/m 18/07/2025
23:00:00
Worthing East Ten Acres
Timeseries Graph
n/mn/mn/m4 (1 Low)6 (1 Low)
*2
18/07/2025
23:00:00

» 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