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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  65 (2 Low) 4 (1 Low) n/m n/m n/m 24/01/2017 06:00
Anglesey Felin Cafnan  n/m n/m n/m - - 24/01/2017 06:00
Anglesey Llynfaes  n/m n/m n/m - - 24/01/2017 06:00
Anglesey Brynteg  n/m n/m n/m - - 24/01/2017 06:00
Caerphilly White Street  n/m 44 (1 Low) n/m n/m 50 (3 Low) 24/01/2017 04:00
Caerphilly Blackwood High Street  n/m 48 (1 Low) n/m n/m - 24/01/2017 06:00
Hafod-yr-ynys Roadside  n/m 117 (2 Low) n/m n/m n/m 24/01/2017 06:00
Nantgarw Road  n/m 15 (1 Low) n/m n/m n/m 24/01/2017 05:00
Caerphilly Fochriw  n/m n/m n/m 23 (2 Low) 23 (2 Low) 24/01/2017 02:00
Cardiff Centre  5 (1 Low) 16 (1 Low) 9 (1 Low) 41 (4 Moderate) - 24/01/2017 06:00
Chepstow A48  n/m 42 (1 Low) n/m 41 (4 Moderate) 46 (3 Low) 24/01/2017 06:00
Cwmbran  - 39 (1 Low) n/m n/m 31 (2 Low) 24/01/2017 06:00
V Glamorgan Windsor Road Penarth  - - n/m n/m - 24/01/2017 06:00
Marchlyn Mawr  79 (3 Low) 4 (1 Low) n/m n/m n/m 24/01/2017 02:00
Newport St Julians Comp School  n/m 46 (1 Low) n/m 41 (4 Moderate) - 24/01/2017 06:00
Newport M4 Junction 25  - 34 (1 Low) n/m n/m n/m 24/01/2017 05:00
Cimla Road / Victoria Gardens  n/m 27 (1 Low) n/m n/m n/m 24/01/2017 02:00
Narberth  63 (2 Low) 5 (1 Low) 2 (1 Low) n/m 27 (2 Low) 24/01/2017 06:00
Port Talbot Theodore Road  n/m n/m n/m n/m 29 (2 Low) 24/01/2017 06:00
Port Talbot Prince Street 2  n/m n/m n/m 25 (3 Low) 38 (3 Low) 24/01/2017 06:00
Port Talbot Margam  15 (1 Low) 47 (1 Low) 2 (1 Low) 26 (3 Low) 42 (3 Low) 24/01/2017 06:00
Port Talbot Dyffryn School  n/m n/m n/m n/m - 24/01/2017 06:00
Port Talbot Docks  n/m n/m n/m n/m 35 (3 Low) 24/01/2017 06:00
Port Talbot Talbot Road  n/m n/m n/m n/m 21 (2 Low) 24/01/2017 06:00
Port Talbot Twll-yn-y-Wal Park  n/m n/m n/m n/m 44 (3 Low) 24/01/2017 06:00
Port Talbot Little Warren  n/m n/m n/m n/m 35 (3 Low) 24/01/2017 06:00
Rhondda-Cynon-Taf Nantgarw  n/m n/m n/m n/m - 24/01/2017 06:00
Rhondda-Cynon-Taf Broadway  n/m 55 (1 Low) n/m n/m n/m 24/01/2017 06:00
Rhondda Pontypridd Gelliwastad Rd  n/m 27 (1 Low) n/m n/m n/m 24/01/2017 02:00
Rhondda Glyncoch Garth Avenue  n/m n/m n/m n/m 36 (3 Low) 24/01/2017 05:00
Rhondda Mountain Ash  n/m 98 (2 Low) n/m n/m n/m 24/01/2017 06:00
Swansea Station Court High Street  n/m 44 (1 Low) n/m n/m n/m 24/01/2017 05:00
Swansea Roadside  n/m 43 (1 Low) n/m 34 (3 Low) 36 (3 Low) 24/01/2017 06:00
Swansea Morriston Roadside  - 44 (1 Low) n/m 31 (3 Low) n/m 24/01/2017 06:00
Swansea Hafod DOAS  15 (1 Low) 57 (1 Low) n/m n/m n/m 24/01/2017 06:00
Swansea St Thomas DOAS  22 (1 Low) 48 (1 Low) - n/m n/m 24/01/2017 06:00
Swansea Cwm Level Park  2 (1 Low) 25 (1 Low) n/m n/m n/m 24/01/2017 05:00
Twynyrodyn  n/m n/m n/m - - 24/01/2017 06:00
Wrexham  n/m 32 (1 Low) 9 (1 Low) n/m n/m 24/01/2017 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