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: 10/08/2022 18:00
Not measured Not measured Not measured 4
Low (1)
10
Low (1)
Anglesey Llynfaes
Updated: 15/01/2022 24:00
Not measured Not measured Not measured Not measured Not measured
Anglesey Penhesgyn 3
Updated: 23/06/2022 11:00
Not measured Not measured Not measured Not measured Not measured
Aston Hill
Updated: 10/08/2022 20:00
138
Moderate (5)
4
Low (1)
Not measured Not measured Not measured
Bridgend Park Street
Updated: 10/08/2022 19:00
Not measured 69
Low (2)
Not measured Not measured 20
Low (2)
Caerphilly Blackwood High Street
Updated: 10/08/2022 18:00
Not measured 17
Low (1)
Not measured Not measured 14
Low (1)
Caerphilly Fochriw
Updated: 10/08/2022 19:00
Not measured Not measured Not measured 6
Low (1)
16
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 10/08/2022 20:00
Not measured 31
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 02/08/2022 07:00
Not measured No Data Not measured Not measured 20
Low (2)
Cardiff Castle Street
Updated: 10/08/2022 20:00
Not measured 81
Low (2)
Not measured 11
Low (1)
31
Low (2)
Cardiff Centre
Updated: 10/08/2022 20:00
122
Moderate (5)
16
Low (1)
6
Low (1)
11
Low (1)
20
Low (2)
Cardiff Newport Road
Updated: 07/08/2022 10:00
Not measured 58
Low (1)
Not measured Not measured 22
Low (2)
Chepstow A48
Updated: 10/08/2022 20:00
Not measured 30
Low (1)
Not measured 13
Low (2)
18
Low (2)
Cimla Road / Victoria Gardens
Updated: 10/08/2022 06:00
Not measured 17
Low (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 10/08/2022 20:00
82
Low (3)
10
Low (1)
Not measured Not measured 23
Low (2)
Hafod-yr-ynys Roadside
Updated: 10/08/2022 20:00
Not measured 61
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 10/08/2022 20:00
111
Moderate (4)
2
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 10/08/2022 20:00
Not measured 31
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 10/08/2022 20:00
108
Moderate (4)
4
Low (1)
3
Low (1)
6
Low (1)
13
Low (1)
Newport M4 Junction 25
Updated: 03/06/2022 24:00
Not measured Not measured Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 10/08/2022 20:00
Not measured 32
Low (1)
Not measured 5
Low (1)
14
Low (1)
Port Talbot Dyffryn School
Updated: 10/08/2022 20:00
Not measured Not measured Not measured 12
Low (2)
42
Low (3)
Port Talbot Little Warren
Updated: 10/08/2022 20:00
Not measured Not measured Not measured 8
Low (1)
19
Low (2)
Port Talbot Margam
Updated: 10/08/2022 19:00
106
Moderate (4)
17
Low (1)
2
Low (1)
11
Low (1)
41
Low (3)
Port Talbot Prince Street 2
Updated: 10/08/2022 20:00
Not measured Not measured Not measured 9
Low (1)
40
Low (3)
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: 10/08/2022 20:00
Not measured Not measured Not measured Not measured 20
Low (2)
Rhondda Mountain Ash
Updated: 10/08/2022 20:00
Not measured 61
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 10/08/2022 06:00
Not measured 21
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 10/08/2022 19:00
Not measured 9
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 10/08/2022 11:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 10/08/2022 12:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 08/08/2022 18:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 01/07/2022 13:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 10/08/2022 13:00
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Updated: 29/07/2022 02:00
Not measured Not measured Not measured Not measured Not measured
Swansea St Thomas DOAS
Updated: 10/08/2022 12:00
Not measured Not measured Not measured Not measured Not measured
Swansea Station Court High Street
Updated: 11/07/2022 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: 10/08/2022 20:00
Not measured 20
Low (1)
6
Low (1)
5
Low (1)
12
Low (1)
Wrexham Chirk
Updated: 10/08/2022 20:00
Not measured 5
Low (1)
Not measured 3
Low (1)
11
Low (1)
Wrexham Chirk Community Hospital
Updated: 10/08/2022 20:00
Not measured 3
Low (1)
Not measured 3
Low (1)
11
Low (1)