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: 04/12/2020 06:00
Not measured Not measured Not measured 2
Low (1)
9
Low (1)
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: 04/12/2020 10:00
62
Low (2)
2
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 04/12/2020 08:00
Not measured 16
Low (1)
Not measured Not measured No Data
Caerphilly Fochriw
Updated: 04/12/2020 10:00
Not measured Not measured Not measured 1
Low (1)
4
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 04/12/2020 09:00
Not measured 53
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 04/12/2020 08:00
Not measured 31
Low (1)
Not measured Not measured No Data
Cardiff Castle Street
Updated: 04/12/2020 10:00
Not measured 55
Low (1)
Not measured 6
Low (1)
8
Low (1)
Cardiff Centre
Updated: 04/12/2020 10:00
46
Low (2)
42
Low (1)
2
Low (1)
3
Low (1)
4
Low (1)
Cardiff Newport Road
Updated: 04/12/2020 10:00
Not measured 43
Low (1)
Not measured Not measured 7
Low (1)
Chepstow A48
Updated: 04/12/2020 10:00
Not measured 84
Low (2)
Not measured 5
Low (1)
8
Low (1)
Cimla Road / Victoria Gardens
Updated: 04/12/2020 07:00
Not measured 39
Low (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 04/12/2020 10:00
66
Low (2)
3
Low (1)
Not measured Not measured 6
Low (1)
Hafod-yr-ynys Roadside
Updated: 04/12/2020 10:00
Not measured 113
Low (2)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 04/12/2020 10:00
63
Low (2)
2
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 04/12/2020 10:00
Not measured 42
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 04/12/2020 10:00
68
Low (3)
2
Low (1)
2
Low (1)
2
Low (1)
3
Low (1)
Newport M4 Junction 25
Updated: 04/12/2020 11:00
39
Low (2)
No Data Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 04/12/2020 10:00
Not measured 23
Low (1)
Not measured 2
Low (1)
3
Low (1)
Port Talbot Dyffryn School
Updated: 04/12/2020 11:00
Not measured Not measured Not measured Not measured 5
Low (1)
Port Talbot Little Warren
Updated: 04/12/2020 11:00
Not measured Not measured Not measured Not measured 4
Low (1)
Port Talbot Margam
Updated: 04/12/2020 09:00
50
Low (2)
23
Low (1)
2
Low (1)
3
Low (1)
6
Low (1)
Port Talbot Prince Street 2
Updated: 04/12/2020 10:00
Not measured Not measured Not measured 9
Low (1)
12
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 04/12/2020 11:00
Not measured Not measured Not measured Not measured 6
Low (1)
Rhondda Glyncoch Garth Avenue
Updated: 04/12/2020 11:00
Not measured Not measured Not measured Not measured 3
Low (1)
Rhondda Mountain Ash
Updated: 04/12/2020 08:00
Not measured 45
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 04/12/2020 07:00
Not measured 24
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 04/12/2020 07:00
Not measured 14
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 04/12/2020 10:00
No Data 18
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 04/12/2020 10:00
57
Low (2)
38
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 04/12/2020 10:00
Not measured 43
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 26/11/2020 07:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 04/12/2020 10:00
Not measured 71
Low (2)
Not measured 4
Low (1)
Not measured
Swansea Roadside
Updated: 04/12/2020 10:00
Not measured 27
Low (1)
Not measured 4
Low (1)
8
Low (1)
Swansea St Thomas DOAS
Updated: 04/12/2020 10:00
50
Low (2)
37
Low (1)
1
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 04/12/2020 10:00
Not measured 93
Low (2)
Not measured Not measured Not measured
Twynyrodyn
Updated: -
Not measured Not measured Not measured Not measured Not measured
V Glamorgan Windsor Road Penarth
Updated: 04/12/2020 06:00
38
Low (2)
16
Low (1)
Not measured Not measured 7
Low (1)
Wrexham
Updated: 04/12/2020 10:00
Not measured 11
Low (1)
8
Low (1)
5
Low (1)
8
Low (1)
Wrexham Chirk
Updated: 04/12/2020 11:00
Not measured 10
Low (1)
Not measured 1
Low (1)
2
Low (1)