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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  55 (2 Low) 13 (1 Low) n/m n/m n/m 27/03/2017 13:00
Anglesey Felin Cafnan  n/m n/m n/m - - 27/03/2017 14:00
Anglesey Llynfaes  n/m n/m n/m - - 27/03/2017 14:00
Anglesey Brynteg  n/m n/m n/m - - 27/03/2017 14:00
Caerphilly White Street  n/m 22 (1 Low) n/m n/m 18 (2 Low) 27/03/2017 12:00
Caerphilly Blackwood High Street  n/m 12 (1 Low) n/m n/m 7 (1 Low) 27/03/2017 12:00
Hafod-yr-ynys Roadside  n/m 59 (1 Low) n/m n/m n/m 27/03/2017 13:00
Nantgarw Road  n/m 21 (1 Low) n/m n/m n/m 27/03/2017 09:00
Caerphilly Fochriw  n/m n/m n/m 9 (1 Low) 13 (1 Low) 27/03/2017 11:00
Cardiff Centre  31 (1 Low) 19 (1 Low) 12 (1 Low) 12 (2 Low) 18 (2 Low) 27/03/2017 13:00
Chepstow A48  n/m - n/m 13 (2 Low) 19 (2 Low) 27/03/2017 14:00
Cwmbran  45 (2 Low) - n/m n/m 12 (1 Low) 27/03/2017 14:00
V Glamorgan Windsor Road Penarth  44 (2 Low) 19 (1 Low) n/m n/m 14 (1 Low) 27/03/2017 06:00
Marchlyn Mawr  89 (3 Low) 4 (1 Low) n/m n/m n/m 27/03/2017 11:00
Newport St Julians Comp School  n/m 22 (1 Low) n/m 14 (2 Low) 15 (1 Low) 27/03/2017 13:00
Newport M4 Junction 25  33 (1 Low) 23 (1 Low) n/m n/m n/m 27/03/2017 13:00
Cimla Road / Victoria Gardens  n/m 17 (1 Low) n/m n/m n/m 27/03/2017 06:00
Narberth  55 (2 Low) 8 (1 Low) 9 (1 Low) n/m 17 (2 Low) 27/03/2017 13:00
Port Talbot Theodore Road  n/m n/m n/m n/m 31 (2 Low) 27/03/2017 14:00
Port Talbot Prince Street 2  n/m n/m n/m 13 (2 Low) 18 (2 Low) 27/03/2017 13:00
Port Talbot Margam  46 (2 Low) 13 (1 Low) 2 (1 Low) 15 (2 Low) 19 (2 Low) 27/03/2017 13:00
Port Talbot Dyffryn School  n/m n/m n/m n/m 21 (2 Low) 27/03/2017 14:00
Port Talbot Docks  n/m n/m n/m n/m 24 (2 Low) 27/03/2017 14:00
Port Talbot Talbot Road  n/m n/m n/m n/m 21 (2 Low) 27/03/2017 14:00
Port Talbot Twll-yn-y-Wal Park  n/m n/m n/m n/m 23 (2 Low) 27/03/2017 14:00
Port Talbot Little Warren  n/m n/m n/m n/m 37 (3 Low) 27/03/2017 14:00
Rhondda-Cynon-Taf Nantgarw  n/m n/m n/m n/m - 27/03/2017 14:00
Rhondda-Cynon-Taf Broadway  n/m 17 (1 Low) n/m n/m n/m 27/03/2017 11:00
Rhondda Pontypridd Gelliwastad Rd  n/m 15 (1 Low) n/m n/m n/m 27/03/2017 06:00
Rhondda Glyncoch Garth Avenue  n/m n/m n/m n/m 16 (1 Low) 27/03/2017 13:00
Rhondda Mountain Ash  n/m 52 (1 Low) n/m n/m n/m 27/03/2017 12:00
Swansea Station Court High Street  n/m 17 (1 Low) n/m n/m n/m 27/03/2017 14:00
Swansea Roadside  n/m 26 (1 Low) n/m 19 (2 Low) 20 (2 Low) 27/03/2017 13:00
Swansea Morriston Roadside  27 (1 Low) 40 (1 Low) n/m 16 (2 Low) n/m 27/03/2017 13:00
Swansea Hafod DOAS  38 (2 Low) 57 (1 Low) n/m n/m n/m 27/03/2017 14:00
Swansea St Thomas DOAS  58 (2 Low) 36 (1 Low) - n/m n/m 27/03/2017 14:00
Swansea Cwm Level Park  94 (3 Low) 8 (1 Low) n/m n/m n/m 27/03/2017 14:00
Twynyrodyn  n/m n/m n/m - - 27/03/2017 14:00
Wrexham  n/m 32 (1 Low) 13 (1 Low) n/m n/m 27/03/2017 13:00

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