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Measured pollution levels across Wales

View 24 Hour Maximums


Site 8 Hour mean Ozone
µg/m³
Hourly mean Nitrogen
Dioxide
µg/m³
Max 15 min mean Sulphur
Dioxide
µg/m³
24 Hour mean PM2.5
Particles
µg/m³
24 Hour mean PM10
Particles
µg/m³
Updated
Aston Hill  64 (2 Low) 1 (1 Low) n/m n/m n/m 12/12/2017 06:00
Anglesey Felin Cafnan  n/m n/m n/m 4 (1 Low) 7 (1 Low) 12/12/2017 06:00
Anglesey Llynfaes  n/m n/m n/m 2 (1 Low) 3 (1 Low) 12/12/2017 06:00
Anglesey Brynteg  n/m n/m n/m 2 (1 Low) 4 (1 Low) 12/12/2017 02:00
Caerphilly Islwyn Road Wattsville  n/m 40 (1 Low) n/m n/m n/m 12/12/2017 03:00
Caerphilly White Street  n/m 53 (1 Low) n/m n/m - 12/12/2017 06:00
Caerphilly Blackwood High Street  n/m 10 (1 Low) n/m n/m 11 (1 Low) 12/12/2017 03:00
Hafod-yr-ynys Roadside  n/m 111 (2 Low) n/m n/m n/m 12/12/2017 06:00
Nantgarw Road  n/m 42 (1 Low) n/m n/m n/m 12/12/2017 01:00
Caerphilly Fochriw  n/m n/m n/m 3 (1 Low) 6 (1 Low) 12/12/2017 03:00
Cardiff Centre  13 (1 Low) 23 (1 Low) 1 (1 Low) 6 (1 Low) 12 (1 Low) 12/12/2017 06:00
Chepstow A48  n/m 54 (1 Low) n/m 4 (1 Low) 10 (1 Low) 12/12/2017 06:00
Cwmbran  22 (1 Low) 41 (1 Low) n/m n/m 11 (1 Low) 12/12/2017 06:00
V Glamorgan Windsor Road Penarth  - - n/m n/m - 12/12/2017 06:00
Marchlyn Mawr  - - n/m n/m n/m 12/12/2017 06:00
Newport St Julians Comp School  n/m - n/m - - 12/12/2017 06:00
Newport M4 Junction 25  2 (1 Low) 47 (1 Low) n/m n/m n/m 12/12/2017 06:00
Cimla Road / Victoria Gardens  n/m 18 (1 Low) n/m n/m n/m 12/12/2017 02:00
Narberth  48 (2 Low) 2 (1 Low) 12 (1 Low) n/m 4 (1 Low) 12/12/2017 06:00
Port Talbot Theodore Road  n/m n/m n/m n/m 5 (1 Low) 12/12/2017 06:00
Port Talbot Prince Street 2  n/m n/m n/m - 2 (1 Low) 12/12/2017 05:00
Port Talbot Margam  - 7 (1 Low) 1 (1 Low) 5 (1 Low) 7 (1 Low) 12/12/2017 06:00
Port Talbot Dyffryn School  n/m n/m n/m n/m - 12/12/2017 06:00
Port Talbot Docks  n/m n/m n/m n/m 8 (1 Low) 12/12/2017 06:00
Port Talbot Talbot Road  n/m n/m n/m n/m 11 (1 Low) 12/12/2017 06:00
Port Talbot Twll-yn-y-Wal Park  n/m n/m n/m n/m 13 (1 Low) 12/12/2017 06:00
Port Talbot Little Warren  n/m n/m n/m n/m 8 (1 Low) 12/12/2017 06:00
Rhondda-Cynon-Taf Broadway  n/m 33 (1 Low) n/m n/m n/m 12/12/2017 02:00
Rhondda Pontypridd Gelliwastad Rd  n/m 25 (1 Low) n/m n/m n/m 12/12/2017 02:00
Rhondda Glyncoch Garth Avenue  n/m n/m n/m n/m 3 (1 Low) 12/12/2017 06:00
Rhondda Mountain Ash  n/m 36 (1 Low) n/m n/m n/m 12/12/2017 03:00
Swansea Station Court High Street  n/m 36 (1 Low) n/m n/m n/m 12/12/2017 06:00
Swansea Roadside  n/m 36 (1 Low) n/m 14 (2 Low) 15 (1 Low) 12/12/2017 06:00
Swansea Morriston Roadside  44 (2 Low) 39 (1 Low) n/m - n/m 12/12/2017 06:00
Swansea Hafod DOAS  20 (1 Low) 48 (1 Low) n/m n/m n/m 12/12/2017 05:00
Swansea St Thomas DOAS  38 (2 Low) 44 (1 Low) - n/m n/m 12/12/2017 06:00
Swansea Cwm Level Park  3 (1 Low) 25 (1 Low) n/m n/m n/m 12/12/2017 05:00
Twynyrodyn  n/m n/m n/m - - 12/12/2017 06:00
Wrexham  n/m 37 (1 Low) - n/m n/m 12/12/2017 06:00

Key

Air pollution is measured on a scale of 1 - 10 Index Points which are grouped into the following bands:
» Find out more about the air quality index.

Index 1 2 3 4 5 6 7 8 9 10
Band Low Moderate High Very high