Current Levels

Current measured levels are shown in the table below - showing concentrations and, where applicable, the corresponding index and bands.

Site 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
Anglesey Brynteg
Updated: 19/08/2018 05:00
No data No data No data 7
Low (1)
13
Low (1)
Anglesey Felin Cafnan
Updated: 19/08/2018 05:00
No data No data No data 9
Low (1)
22
Low (2)
Anglesey Llynfaes
Updated: 19/08/2018 05:00
No data No data No data 8
Low (1)
15
Low (1)
Anglesey Penhesgyn 3
Updated: 19/08/2018 05:00
No data No data No data 5
Low (1)
8
Low (1)
Aston Hill
Updated: 18/08/2018 21:00
No data No data No data No data No data
Caerphilly Blackwood High Street
Updated: 19/08/2018 07:00
No data 2
Low (1)
No data No data 12
Low (1)
Caerphilly Fochriw
Updated: 19/08/2018 03:00
No data No data No data 3
Low (1)
5
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 19/08/2018 05:00
No data 4
Low (1)
No data No data No data
Caerphilly White Street
Updated: 19/08/2018 07:00
No data 1
Low (1)
No data No data No data
Cardiff Centre
Updated: 18/08/2018 21:00
No data No data No data No data No data
Cardiff Newport Road
Updated: 18/08/2018 21:00
No data No data No data No data No data
Chepstow A48
Updated: 18/08/2018 21:00
No data No data No data No data No data
Cimla Road / Victoria Gardens
Updated: 19/08/2018 06:00
No data 5
Low (1)
No data No data No data
Cwmbran
Updated: 18/08/2018 21:00
No data No data No data No data 12
Low (1)
Hafod-yr-ynys Roadside
Updated: 18/08/2018 21:00
No data No data No data No data No data
Marchlyn Mawr
Updated: 31/07/2018 05:00
No data No data No data No data No data
Nantgarw Road
Updated: 19/08/2018 04:00
No data No data No data No data No data
Narberth
Updated: 18/08/2018 21:00
No data No data No data No data No data
Newport M4 Junction 25
Updated: 19/08/2018 08:00
23
Low (1)
5
Low (1)
No data No data No data
Newport St Julians Comp School
Updated: 18/08/2018 20:00
No data No data No data No data No data
Port Talbot Dyffryn School
Updated: 28/06/2017 08:00
No data No data No data No data No data
Port Talbot Little Warren
Updated: 19/08/2018 07:00
No data No data No data No data 13
Low (1)
Port Talbot Margam
Updated: 18/08/2018 21:00
No data No data No data No data No data
Port Talbot Prince Street 2
Updated: 19/08/2018 07:00
No data No data No data 1
Low (1)
1
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 19/08/2018 07:00
No data No data No data No data 23
Low (2)
Rhondda Glyncoch Garth Avenue
Updated: 19/08/2018 07:00
No data No data No data No data 18
Low (2)
Rhondda Mountain Ash
Updated: 19/08/2018 07:00
No data 15
Low (1)
No data No data No data
Rhondda Pontypridd Gelliwastad Rd
Updated: 19/08/2018 06:00
No data 1
Low (1)
No data No data No data
Rhondda-Cynon-Taf Broadway
Updated: 19/08/2018 06:00
No data 2
Low (1)
No data No data No data
Swansea Cwm Level Park
Updated: 19/08/2018 05:00
43
Low (2)
1
Low (1)
No data No data No data
Swansea Hafod DOAS
Updated: 22/05/2018 12:00
43
Low (2)
2
Low (1)
No data No data No data
Swansea Morfa Road NOX
Updated: 11/06/2018 09:00
No data No data No data No data No data
Swansea Morriston Roadside
Updated: 13/08/2018 14:00
No data No data No data No data No data
Swansea Roadside
Updated: 18/08/2018 21:00
No data No data No data No data No data
Swansea St Thomas DOAS
Updated: 19/08/2018 07:00
62
Low (2)
10
Low (1)
1
Low (1)
No data No data
Swansea Station Court High Street
Updated: 17/08/2018 23:00
No data No data No data No data No data
Twynyrodyn
Updated: 05/04/2018 14:00
No data No data No data No data No data
V Glamorgan Windsor Road Penarth
Updated: 19/08/2018 05:00
29
Low (1)
-1
Low (1)
No data No data 17
Low (2)
Wrexham
Updated: 18/08/2018 21:00
No data No data No data No data No data