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 7am Sun 21st Jul 2024

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South Wales

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
Cardiff Centre
Timeseries Graph
29 (1 Low)3 (1 Low)n/a4 (1 Low)5 (1 Low)
*1
21/07/2024
07:00:00
Cardiff Newport Road
Timeseries Graph
n/m8 (1 Low)n/mn/m6 (1 Low)
*1
21/07/2024
07:00:00
Chepstow A48
Timeseries Graph
n/m5 (1 Low)n/m2 (1 Low)7 (1 Low)
*1
21/07/2024
07:00:00
Cwmbran Crownbridge
Timeseries Graph
48 (2 Low)2 (1 Low)n/mn/mn/m 21/07/2024
07:00:00
Hafod-yr-ynys Hill Roadside
Timeseries Graph
n/m8 (1 Low)n/mn/mn/m 21/07/2024
07:00:00
Narberth
Timeseries Graph
34 (2 Low)2 (1 Low)2 (1 Low)2 (1 Low)5 (1 Low)
*2
21/07/2024
07:00:00
Newport
Timeseries Graph
n/m8 (1 Low)n/m2 (1 Low)5 (1 Low)
*2
21/07/2024
07:00:00
Port Talbot Margam
Timeseries Graph
41 (2 Low)8 (1 Low)1 (1 Low)4 (1 Low)7 (1 Low)
*3
21/07/2024
07:00:00
Swansea Roadside
Timeseries Graph
n/m2 (1 Low)n/m3 (1 Low)5 (1 Low)
*1
21/07/2024
07:00:00

» 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