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: 25/01/2022 19:00
Not measured Not measured Not measured 12
Low (2)
24
Low (2)
Anglesey Llynfaes
Updated: 25/01/2022 19:00
Not measured Not measured Not measured 3
Low (1)
8
Low (1)
Anglesey Penhesgyn 3
Updated: 25/01/2022 19:00
Not measured Not measured Not measured 9
Low (1)
24
Low (2)
Aston Hill
Updated: 25/01/2022 19:00
45
Low (2)
5
Low (1)
Not measured Not measured Not measured
Bridgend Park Street
Updated: 25/01/2022 20:00
Not measured 52
Low (1)
Not measured Not measured 29
Low (2)
Caerphilly Blackwood High Street
Updated: 25/01/2022 19:00
Not measured 58
Low (1)
Not measured Not measured 28
Low (2)
Caerphilly Fochriw
Updated: 25/01/2022 01:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly Islwyn Road Wattsville
Updated: 25/01/2022 18:00
Not measured 46
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 25/01/2022 19:00
Not measured 71
Low (2)
Not measured Not measured 35
Low (3)
Cardiff Castle Street
Updated: 25/01/2022 19:00
Not measured 54
Low (1)
Not measured 27
Low (3)
37
Low (3)
Cardiff Centre
Updated: 25/01/2022 19:00
23
Low (1)
37
Low (1)
3
Low (1)
28
Low (3)
30
Low (2)
Cardiff Newport Road
Updated: 25/01/2022 19:00
Not measured 44
Low (1)
Not measured Not measured 36
Low (3)
Chepstow A48
Updated: 25/01/2022 19:00
Not measured 57
Low (1)
Not measured 26
Low (3)
34
Low (3)
Cimla Road / Victoria Gardens
Updated: 25/01/2022 07:00
Not measured 33
Low (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 25/01/2022 19:00
22
Low (1)
53
Low (1)
Not measured Not measured 18
Low (2)
Hafod-yr-ynys Roadside
Updated: 25/01/2022 19:00
Not measured 57
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 25/01/2022 20:00
62
Low (2)
1
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 25/01/2022 10:00
Not measured 44
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 25/01/2022 18:00
37
Low (2)
14
Low (1)
3
Low (1)
25
Low (3)
31
Low (2)
Newport M4 Junction 25
Updated: 25/01/2022 20:00
6
Low (1)
68
Low (2)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 24/01/2022 09:00
Not measured No Data Not measured 25
Low (3)
30
Low (2)
Port Talbot Dyffryn School
Updated: 20/01/2021 22:00
Not measured Not measured Not measured Not measured Not measured
Port Talbot Little Warren
Updated: 19/01/2022 14:00
Not measured Not measured Not measured Not measured Not measured
Port Talbot Margam
Updated: 25/01/2022 19:00
13
Low (1)
49
Low (1)
3
Low (1)
25
Low (3)
33
Low (2)
Port Talbot Prince Street 2
Updated: 25/01/2022 19:00
Not measured Not measured Not measured 24
Low (3)
32
Low (2)
Port Talbot Twll-yn-y-Wal Park
Updated: 18/03/2021 12:00
Not measured Not measured Not measured Not measured Not measured
Rhondda Glyncoch Garth Avenue
Updated: 25/01/2022 20:00
Not measured Not measured Not measured Not measured 34
Low (3)
Rhondda Mountain Ash
Updated: 25/01/2022 13:00
Not measured 69
Low (2)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 25/01/2022 07:00
Not measured 63
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 25/01/2022 20:00
Not measured 48
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 25/01/2022 19:00
10
Low (1)
54
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 08/01/2022 02:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 21/01/2022 09:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 19/11/2021 15:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 25/01/2022 19:00
Not measured 58
Low (1)
Not measured 27
Low (3)
Not measured
Swansea Roadside
Updated: 25/01/2022 19:00
Not measured 59
Low (1)
Not measured 29
Low (3)
36
Low (3)
Swansea St Thomas DOAS
Updated: 25/01/2022 19:00
28
Low (1)
85
Low (2)
7
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 21/01/2022 09:00
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
Wrexham
Updated: 25/01/2022 19:00
Not measured 47
Low (1)
No Data 26
Low (3)
36
Low (3)
Wrexham Chirk
Updated: 24/01/2022 09:00
Not measured Not measured Not measured Not measured Not measured
Wrexham Chirk Community Hospital
Updated: 25/01/2022 20:00
Not measured 38
Low (1)
Not measured 7
Low (1)
13
Low (1)