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: 23/05/2018 11:00
No data No data No data No data No data
Anglesey Felin Cafnan
Updated: 20/06/2018 12:00
No data No data No data 11
Low (1)
17
Low (2)
Anglesey Llynfaes
Updated: 01/06/2018 19:00
No data No data No data No data No data
Anglesey Penhesgyn 3
Updated: 20/06/2018 09:00
No data No data No data 5
Low (1)
10
Low (1)
Aston Hill
Updated: 20/06/2018 13:00
25
Low (1)
1
Low (1)
No data No data No data
Caerphilly Blackwood High Street
Updated: 20/06/2018 12:00
No data 18
Low (1)
No data No data 9
Low (1)
Caerphilly Fochriw
Updated: 20/06/2018 11:00
No data No data No data 3
Low (1)
2
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 20/06/2018 11:00
No data 16
Low (1)
No data No data No data
Caerphilly White Street
Updated: 20/06/2018 12:00
No data 5
Low (1)
No data No data 10
Low (1)
Cardiff Centre
Updated: 20/06/2018 13:00
9
Low (1)
4
Low (1)
4
Low (1)
4
Low (1)
9
Low (1)
Cardiff Newport Road
Updated: 20/06/2018 13:00
No data 3
Low (1)
No data No data 6
Low (1)
Chepstow A48
Updated: 20/06/2018 13:00
No data 24
Low (1)
No data 4
Low (1)
8
Low (1)
Cimla Road / Victoria Gardens
Updated: 20/06/2018 06:00
No data 15
Low (1)
No data No data No data
Cwmbran
Updated: 20/06/2018 13:00
15
Low (1)
2
Low (1)
No data No data 7
Low (1)
Hafod-yr-ynys Roadside
Updated: 20/06/2018 13:00
No data 31
Low (1)
No data No data No data
Marchlyn Mawr
Updated: 04/07/2017 06:00
No data No data No data No data No data
Nantgarw Road
Updated: 20/06/2018 09:00
No data 27
Low (1)
No data No data No data
Narberth
Updated: 20/06/2018 13:00
18
Low (1)
No data 2
Low (1)
No data 5
Low (1)
Newport M4 Junction 25
Updated: 20/06/2018 13:00
No data 15
Low (1)
No data No data No data
Newport St Julians Comp School
Updated: 20/06/2018 12:00
No data 11
Low (1)
No data 4
Low (1)
8
Low (1)
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: 20/06/2018 13:00
No data No data No data No data 10
Low (1)
Port Talbot Margam
Updated: 20/06/2018 13:00
15
Low (1)
4
Low (1)
3
Low (1)
10
Low (1)
26
Low (2)
Port Talbot Prince Street 2
Updated: 20/06/2018 13:00
No data No data No data 9
Low (1)
24
Low (2)
Port Talbot Twll-yn-y-Wal Park
Updated: 20/06/2018 13:00
No data No data No data No data 19
Low (2)
Rhondda Glyncoch Garth Avenue
Updated: 20/06/2018 13:00
No data No data No data No data 18
Low (2)
Rhondda Mountain Ash
Updated: 20/06/2018 12:00
No data 20
Low (1)
No data No data No data
Rhondda Pontypridd Gelliwastad Rd
Updated: 12/06/2018 03:00
No data No data No data No data No data
Rhondda-Cynon-Taf Broadway
Updated: 06/06/2018 19:00
No data No data No data No data No data
Swansea Cwm Level Park
Updated: 20/06/2018 11:00
18
Low (1)
3
Low (1)
No data No data No data
Swansea Hafod DOAS
Updated: 22/05/2018 12:00
51
Low (2)
9
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: 14/06/2018 13:00
No data No data No data No data No data
Swansea Roadside
Updated: 20/06/2018 13:00
No data 13
Low (1)
No data 15
Low (2)
15
Low (1)
Swansea St Thomas DOAS
Updated: 20/06/2018 13:00
39
Low (2)
20
Low (1)
1
Low (1)
No data No data
Swansea Station Court High Street
Updated: 20/06/2018 13:00
No data 48
Low (1)
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: 20/06/2018 05:00
12
Low (1)
2
Low (1)
No data No data 9
Low (1)
Wrexham
Updated: 20/06/2018 13:00
No data 3
Low (1)
1
Low (1)
No data No data