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: 19/10/2021 18:00
Not measured Not measured Not measured Not measured Not measured
Anglesey Llynfaes
Updated: 19/10/2021 18:00
Not measured Not measured Not measured Not measured Not measured
Anglesey Penhesgyn 3
Updated: 19/10/2021 18:00
Not measured Not measured Not measured Not measured Not measured
Aston Hill
Updated: 19/10/2021 24:00
61
Low (2)
No Data Not measured Not measured Not measured
Bridgend Park Street
Updated: 19/10/2021 19:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 19/10/2021 22:00
Not measured 10
Low (1)
Not measured Not measured 15
Low (1)
Caerphilly Fochriw
Updated: 15/10/2021 24:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly Islwyn Road Wattsville
Updated: 19/10/2021 20:00
Not measured 13
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 19/10/2021 22:00
Not measured 3
Low (1)
Not measured Not measured 15
Low (1)
Cardiff Castle Street
Updated: 19/10/2021 23:00
Not measured 23
Low (1)
Not measured 5
Low (1)
20
Low (2)
Cardiff Centre
Updated: 19/10/2021 23:00
No Data 17
Low (1)
6
Low (1)
6
Low (1)
12
Low (1)
Cardiff Newport Road
Updated: 19/10/2021 24:00
Not measured 14
Low (1)
Not measured Not measured 13
Low (1)
Chepstow A48
Updated: 19/10/2021 22:00
Not measured No Data Not measured 5
Low (1)
11
Low (1)
Cimla Road / Victoria Gardens
Updated: 19/10/2021 06:00
Not measured 8
Low (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 19/10/2021 24:00
48
Low (2)
1
Low (1)
Not measured Not measured 14
Low (1)
Hafod-yr-ynys Roadside
Updated: 19/10/2021 24:00
Not measured 9
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 19/10/2021 23:00
69
Low (3)
No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 19/10/2021 20:00
Not measured 10
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 19/10/2021 24:00
64
Low (2)
1
Low (1)
3
Low (1)
7
Low (1)
10
Low (1)
Newport M4 Junction 25
Updated: 19/10/2021 24:00
No Data 15
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 19/10/2021 24:00
Not measured 7
Low (1)
Not measured 10
Low (1)
22
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: 19/10/2021 24:00
Not measured Not measured Not measured Not measured 20
Low (2)
Port Talbot Margam
Updated: 19/10/2021 23:00
48
Low (2)
11
Low (1)
12
Low (1)
17
Low (2)
46
Low (3)
Port Talbot Prince Street 2
Updated: 19/10/2021 14:00
Not measured Not measured Not measured Not measured Not measured
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: 19/10/2021 23:00
Not measured Not measured Not measured Not measured 8
Low (1)
Rhondda Mountain Ash
Updated: 19/10/2021 20:00
Not measured 30
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 19/10/2021 06:00
Not measured 15
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 19/10/2021 19:00
Not measured 19
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 07/10/2021 02:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 19/10/2021 22:00
No Data 31
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 19/10/2021 23:00
Not measured 6
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 01/07/2021 07:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 19/10/2021 23:00
Not measured 4
Low (1)
Not measured 14
Low (2)
Not measured
Swansea Roadside
Updated: 19/10/2021 24:00
Not measured 2
Low (1)
Not measured 20
Low (2)
19
Low (2)
Swansea St Thomas DOAS
Updated: 19/10/2021 23:00
No Data 28
Low (1)
2
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 19/10/2021 23:00
Not measured 28
Low (1)
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: 19/10/2021 23:00
Not measured 4
Low (1)
3
Low (1)
3
Low (1)
5
Low (1)
Wrexham Chirk
Updated: 19/10/2021 24:00
Not measured 10
Low (1)
Not measured 2
Low (1)
6
Low (1)