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: 25/01/2021 24:00
Not measured Not measured Not measured Not measured Not measured
Anglesey Llynfaes
Updated: -
Not measured Not measured Not measured Not measured Not measured
Anglesey Penhesgyn 3
Updated: -
Not measured Not measured Not measured Not measured Not measured
Aston Hill
Updated: 27/01/2021 09:00
73
Low (3)
2
Low (1)
Not measured Not measured Not measured
Bridgend Park Street
Updated: 27/01/2021 09:00
Not measured 70
Low (2)
Not measured Not measured 9
Low (1)
Caerphilly Blackwood High Street
Updated: 27/01/2021 08:00
Not measured 45
Low (1)
Not measured Not measured 11
Low (1)
Caerphilly Fochriw
Updated: 25/01/2021 20:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly Islwyn Road Wattsville
Updated: 27/01/2021 09:00
Not measured 51
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 27/01/2021 04:00
Not measured 10
Low (1)
Not measured Not measured 16
Low (1)
Cardiff Castle Street
Updated: 27/01/2021 10:00
Not measured 59
Low (1)
Not measured 6
Low (1)
10
Low (1)
Cardiff Centre
Updated: 27/01/2021 09:00
39
Low (2)
54
Low (1)
2
Low (1)
3
Low (1)
3
Low (1)
Cardiff Newport Road
Updated: 27/01/2021 09:00
Not measured 58
Low (1)
Not measured Not measured 9
Low (1)
Chepstow A48
Updated: 27/01/2021 09:00
Not measured 69
Low (2)
Not measured 11
Low (1)
11
Low (1)
Cimla Road / Victoria Gardens
Updated: 27/01/2021 07:00
Not measured 50
Low (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 27/01/2021 09:00
35
Low (2)
38
Low (1)
Not measured Not measured 8
Low (1)
Hafod-yr-ynys Roadside
Updated: 27/01/2021 09:00
Not measured 161
Low (3)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 27/01/2021 09:00
71
Low (3)
1
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 27/01/2021 10:00
Not measured 60
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 27/01/2021 09:00
59
Low (2)
3
Low (1)
4
Low (1)
1
Low (1)
3
Low (1)
Newport M4 Junction 25
Updated: 27/01/2021 10:00
16
Low (1)
91
Low (2)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 27/01/2021 09:00
Not measured 46
Low (1)
Not measured 6
Low (1)
7
Low (1)
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: 27/01/2021 10:00
Not measured Not measured Not measured Not measured 9
Low (1)
Port Talbot Margam
Updated: 27/01/2021 08:00
51
Low (2)
21
Low (1)
1
Low (1)
4
Low (1)
No Data
Port Talbot Prince Street 2
Updated: 27/01/2021 10:00
Not measured Not measured Not measured 4
Low (1)
7
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 27/01/2021 10:00
Not measured Not measured Not measured Not measured 7
Low (1)
Rhondda Glyncoch Garth Avenue
Updated: 27/01/2021 10:00
Not measured Not measured Not measured Not measured 19
Low (2)
Rhondda Mountain Ash
Updated: 27/01/2021 08:00
Not measured 83
Low (2)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 27/01/2021 07:00
Not measured 64
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 27/01/2021 07:00
Not measured 36
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 27/01/2021 09:00
No Data 39
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 27/01/2021 09:00
18
Low (1)
69
Low (2)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 27/01/2021 07:00
Not measured 56
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 21/01/2021 15:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 27/01/2021 09:00
Not measured 70
Low (2)
Not measured 9
Low (1)
Not measured
Swansea Roadside
Updated: 27/01/2021 07:00
Not measured No Data Not measured 11
Low (1)
10
Low (1)
Swansea St Thomas DOAS
Updated: 07/01/2021 04:00
Not measured Not measured Not measured Not measured Not measured
Swansea Station Court High Street
Updated: 27/01/2021 09:00
Not measured 45
Low (1)
Not measured Not measured Not measured
Twynyrodyn
Updated: -
Not measured Not measured Not measured Not measured Not measured
V Glamorgan Windsor Road Penarth
Updated: 03/01/2021 01:00
Not measured Not measured Not measured Not measured Not measured
Wrexham
Updated: 27/01/2021 09:00
Not measured 64
Low (1)
7
Low (1)
7
Low (1)
9
Low (1)
Wrexham Chirk
Updated: 27/01/2021 01:00
Not measured No Data Not measured 1
Low (1)
3
Low (1)