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: 17/01/2020 19:00
Not measured Not measured Not measured 10
Low (1)
22
Low (2)
Anglesey Llynfaes
Updated: 17/01/2020 19:00
Not measured Not measured Not measured 9
Low (1)
19
Low (2)
Anglesey Penhesgyn 3
Updated: 17/01/2020 19:00
Not measured Not measured Not measured 9
Low (1)
18
Low (2)
Aston Hill
Updated: 17/01/2020 24:00
74
Low (3)
1
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 17/01/2020 23:00
Not measured 55
Low (1)
Not measured Not measured 9
Low (1)
Caerphilly Fochriw
Updated: 17/01/2020 20:00
Not measured Not measured Not measured 5
Low (1)
8
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 17/01/2020 21:00
Not measured 53
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 17/01/2020 23:00
Not measured 58
Low (1)
Not measured Not measured 9
Low (1)
Cardiff Centre
Updated: 17/01/2020 24:00
25
Low (1)
32
Low (1)
14
Low (1)
No Data No Data
Cardiff Newport Road
Updated: 17/01/2020 24:00
Not measured 33
Low (1)
Not measured Not measured No Data
Chepstow A48
Updated: 17/01/2020 24:00
Not measured 43
Low (1)
Not measured 7
Low (1)
11
Low (1)
Cimla Road / Victoria Gardens
Updated: 17/01/2020 07:00
Not measured 35
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 17/01/2020 24:00
23
Low (1)
24
Low (1)
Not measured Not measured 12
Low (1)
Hafod-yr-ynys Roadside
Updated: 17/01/2020 24:00
Not measured 78
Low (2)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 17/01/2020 23:00
70
Low (3)
2
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 17/01/2020 21:00
Not measured 85
Low (2)
Not measured Not measured Not measured
Narberth
Updated: 17/01/2020 24:00
48
Low (2)
3
Low (1)
2
Low (1)
3
Low (1)
7
Low (1)
Newport M4 Junction 25
Updated: 17/01/2020 23:00
9
Low (1)
67
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 16/01/2020 10:00
Not measured No Data Not measured 5
Low (1)
9
Low (1)
Port Talbot Dyffryn School
Updated: 16/01/2020 24:00
Not measured Not measured Not measured Not measured Not measured
Port Talbot Little Warren
Updated: 17/01/2020 23:00
Not measured Not measured Not measured Not measured 14
Low (1)
Port Talbot Margam
Updated: 17/01/2020 24:00
41
Low (2)
13
Low (1)
1
Low (1)
No Data No Data
Port Talbot Prince Street 2
Updated: 17/01/2020 23:00
Not measured Not measured Not measured 6
Low (1)
14
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 17/01/2020 23:00
Not measured Not measured Not measured Not measured 12
Low (1)
Rhondda Glyncoch Garth Avenue
Updated: 17/01/2020 23:00
Not measured Not measured Not measured Not measured 7
Low (1)
Rhondda Mountain Ash
Updated: 17/01/2020 21:00
Not measured 90
Low (2)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 17/01/2020 07:00
Not measured 39
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 17/01/2020 20:00
Not measured 71
Low (2)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 15/01/2020 17:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 04/01/2020 03:00
37
Low (2)
51
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 16/01/2020 10:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 15/01/2020 07:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 17/01/2020 23:00
Not measured 51
Low (1)
Not measured No Data Not measured
Swansea Roadside
Updated: 17/01/2020 24:00
Not measured 39
Low (1)
Not measured No Data No Data
Swansea St Thomas DOAS
Updated: 17/01/2020 23:00
57
Low (2)
78
Low (2)
1
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 17/01/2020 15:00
Not measured Not measured Not measured Not measured Not measured
Twynyrodyn
Updated: 02/07/2019 24:00
Not measured Not measured Not measured Not measured Not measured
V Glamorgan Windsor Road Penarth
Updated: 17/01/2020 06:00
61
Low (2)
2
Low (1)
Not measured Not measured 22
Low (2)
Wrexham
Updated: 17/01/2020 24:00
Not measured 7
Low (1)
11
Low (1)
4
Low (1)
8
Low (1)