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: 10/08/2020 18:00
Not measured Not measured Not measured 9
Low (1)
33
Low (2)
Anglesey Llynfaes
Updated: 10/08/2020 18:00
Not measured Not measured Not measured 7
Low (1)
24
Low (2)
Anglesey Penhesgyn 3
Updated: 10/08/2020 18:00
Not measured Not measured Not measured 8
Low (1)
31
Low (2)
Aston Hill
Updated: 10/08/2020 18:00
88
Low (3)
8
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 10/08/2020 18:00
Not measured 27
Low (1)
Not measured Not measured 26
Low (2)
Caerphilly Fochriw
Updated: 07/08/2020 24:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly Islwyn Road Wattsville
Updated: 10/08/2020 17:00
Not measured 29
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 10/08/2020 18:00
Not measured 33
Low (1)
Not measured Not measured No Data
Cardiff Centre
Updated: 10/08/2020 18:00
55
Low (2)
8
Low (1)
1
Low (1)
19
Low (2)
25
Low (2)
Cardiff Newport Road
Updated: 10/08/2020 18:00
Not measured 35
Low (1)
Not measured Not measured 34
Low (3)
Chepstow A48
Updated: 10/08/2020 18:00
Not measured 19
Low (1)
Not measured 26
Low (3)
38
Low (3)
Cimla Road / Victoria Gardens
Updated: 17/07/2020 06:00
Not measured Not measured Not measured Not measured Not measured
Cwmbran
Updated: 07/08/2020 08:00
Not measured Not measured Not measured Not measured Not measured
Hafod-yr-ynys Roadside
Updated: 10/08/2020 18:00
Not measured 87
Low (2)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 10/08/2020 18:00
101
Moderate (4)
2
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 10/08/2020 09:00
Not measured 14
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 10/08/2020 18:00
74
Low (3)
3
Low (1)
9
Low (1)
11
Low (1)
15
Low (1)
Newport M4 Junction 25
Updated: 10/08/2020 19:00
57
Low (2)
14
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 10/08/2020 18:00
Not measured 24
Low (1)
Not measured 18
Low (2)
26
Low (2)
Port Talbot Dyffryn School
Updated: 10/08/2020 17:00
Not measured Not measured Not measured Not measured 34
Low (3)
Port Talbot Little Warren
Updated: 10/08/2020 18:00
Not measured Not measured Not measured Not measured 32
Low (2)
Port Talbot Margam
Updated: 10/08/2020 17:00
47
Low (2)
14
Low (1)
1
Low (1)
18
Low (2)
33
Low (2)
Port Talbot Prince Street 2
Updated: 10/08/2020 18:00
Not measured Not measured Not measured 19
Low (2)
37
Low (3)
Port Talbot Twll-yn-y-Wal Park
Updated: 10/08/2020 18:00
Not measured Not measured Not measured Not measured No Data
Rhondda Glyncoch Garth Avenue
Updated: 10/08/2020 18:00
Not measured Not measured Not measured Not measured 34
Low (3)
Rhondda Mountain Ash
Updated: 05/08/2020 07:00
Not measured Not measured Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 10/08/2020 06:00
Not measured 14
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 10/08/2020 17:00
Not measured 32
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 31/07/2020 10:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 31/07/2020 10:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 23/07/2020 12:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: -
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 31/07/2020 10:00
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Updated: 10/08/2020 18:00
Not measured 44
Low (1)
Not measured 17
Low (2)
28
Low (2)
Swansea St Thomas DOAS
Updated: 31/07/2020 10:00
Not measured Not measured Not measured Not measured Not measured
Swansea Station Court High Street
Updated: 31/07/2020 09:00
Not measured Not measured Not measured Not measured Not measured
Twynyrodyn
Updated: -
Not measured Not measured Not measured Not measured Not measured
V Glamorgan Windsor Road Penarth
Updated: 10/08/2020 14:00
No Data 23
Low (1)
Not measured Not measured 34
Low (3)
Wrexham
Updated: 10/08/2020 18:00
Not measured 21
Low (1)
5
Low (1)
19
Low (2)
29
Low (2)