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: 26/05/2019 18:00
Not measured Not measured Not measured 6
Low (1)
13
Low (1)
Anglesey Llynfaes
Updated: 26/05/2019 18:00
Not measured Not measured Not measured 9
Low (1)
15
Low (1)
Anglesey Penhesgyn 3
Updated: 26/05/2019 18:00
Not measured Not measured Not measured 6
Low (1)
10
Low (1)
Aston Hill
Updated: 26/05/2019 24:00
68
Low (3)
1
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 26/05/2019 22:00
Not measured 25
Low (1)
Not measured Not measured 9
Low (1)
Caerphilly Fochriw
Updated: 26/05/2019 19:00
Not measured Not measured Not measured 3
Low (1)
5
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 26/05/2019 20:00
Not measured 16
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 26/05/2019 22:00
Not measured 18
Low (1)
Not measured Not measured 15
Low (1)
Cardiff Centre
Updated: 26/05/2019 24:00
44
Low (2)
12
Low (1)
4
Low (1)
9
Low (1)
12
Low (1)
Cardiff Newport Road
Updated: 26/05/2019 24:00
Not measured 18
Low (1)
Not measured Not measured 9
Low (1)
Chepstow A48
Updated: 26/05/2019 24:00
Not measured 58
Low (1)
Not measured 13
Low (2)
17
Low (2)
Cimla Road / Victoria Gardens
Updated: 26/05/2019 06:00
Not measured 6
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 26/05/2019 24:00
60
Low (2)
5
Low (1)
Not measured Not measured No Data
Hafod-yr-ynys Roadside
Updated: 26/05/2019 24:00
Not measured 36
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 25/11/2018 03:00
No Data No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 26/05/2019 20:00
Not measured 9
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 26/05/2019 24:00
36
Low (2)
4
Low (1)
No Data 4
Low (1)
7
Low (1)
Newport M4 Junction 25
Updated: 26/05/2019 22:00
25
Low (1)
23
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 26/05/2019 23:00
Not measured 13
Low (1)
Not measured 7
Low (1)
13
Low (1)
Port Talbot Dyffryn School
Updated: 26/05/2019 21:00
Not measured Not measured Not measured Not measured No Data
Port Talbot Little Warren
Updated: 26/05/2019 22:00
Not measured Not measured Not measured Not measured 10
Low (1)
Port Talbot Margam
Updated: 26/05/2019 24:00
56
Low (2)
7
Low (1)
1
Low (1)
8
Low (1)
16
Low (1)
Port Talbot Prince Street 2
Updated: 26/05/2019 22:00
Not measured Not measured Not measured 17
Low (2)
42
Low (3)
Port Talbot Twll-yn-y-Wal Park
Updated: 26/05/2019 22:00
Not measured Not measured Not measured Not measured 12
Low (1)
Rhondda Glyncoch Garth Avenue
Updated: 12/10/2018 01:00
Not measured Not measured Not measured Not measured No Data
Rhondda Mountain Ash
Updated: 26/05/2019 20:00
Not measured 31
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 26/05/2019 06:00
Not measured 3
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 26/05/2019 19:00
Not measured 10
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 26/05/2019 21:00
58
Low (2)
6
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 26/05/2019 21:00
64
Low (2)
13
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 26/05/2019 21:00
Not measured 19
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 24/05/2019 14:00
No Data No Data Not measured No Data Not measured
Swansea Roadside
Updated: 26/05/2019 24:00
Not measured 18
Low (1)
Not measured 12
Low (2)
12
Low (1)
Swansea St Thomas DOAS
Updated: 26/05/2019 21:00
68
Low (3)
25
Low (1)
1
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 26/05/2019 21:00
Not measured 41
Low (1)
Not measured Not measured Not measured
Twynyrodyn
Updated: 31/03/2019 24:00
Not measured Not measured Not measured No Data No Data
V Glamorgan Windsor Road Penarth
Updated: 26/05/2019 05:00
No Data No Data Not measured Not measured 14
Low (1)
Wrexham
Updated: 26/05/2019 24:00
Not measured No Data No Data 4
Low (1)
7
Low (1)