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: 22/10/2018 17:00
Not measured Not measured Not measured No Data No Data
Anglesey Felin Cafnan
Updated: 21/11/2018 17:00
Not measured Not measured Not measured 3
Low (1)
6
Low (1)
Anglesey Llynfaes
Updated: 21/11/2018 17:00
Not measured Not measured Not measured 3
Low (1)
5
Low (1)
Anglesey Penhesgyn 3
Updated: 21/11/2018 17:00
Not measured Not measured Not measured 2
Low (1)
4
Low (1)
Aston Hill
Updated: 21/11/2018 17:00
29
Low (1)
15
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 21/11/2018 13:00
Not measured 18
Low (1)
Not measured Not measured 16
Low (1)
Caerphilly Fochriw
Updated: 21/11/2018 12:00
Not measured Not measured Not measured 9
Low (1)
12
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 21/11/2018 18:00
Not measured 37
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 21/11/2018 13:00
Not measured 39
Low (1)
Not measured Not measured 18
Low (2)
Cardiff Centre
Updated: 21/11/2018 17:00
12
Low (1)
47
Low (1)
3
Low (1)
16
Low (2)
19
Low (2)
Cardiff Newport Road
Updated: 21/11/2018 17:00
Not measured 81
Low (2)
Not measured Not measured 23
Low (2)
Chepstow A48
Updated: 21/11/2018 17:00
Not measured 76
Low (2)
Not measured 15
Low (2)
23
Low (2)
Cimla Road / Victoria Gardens
Updated: 21/11/2018 07:00
Not measured 35
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 21/11/2018 17:00
18
Low (1)
41
Low (1)
Not measured Not measured 11
Low (1)
Hafod-yr-ynys Roadside
Updated: 21/11/2018 16:00
Not measured 84
Low (2)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 01/11/2018 14:00
No Data No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 21/11/2018 10:00
Not measured 27
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 21/11/2018 17:00
26
Low (1)
19
Low (1)
9
Low (1)
14
Low (2)
16
Low (1)
Newport M4 Junction 25
Updated: 21/11/2018 18:00
11
Low (1)
37
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 21/11/2018 16:00
Not measured 40
Low (1)
Not measured 16
Low (2)
19
Low (2)
Port Talbot Dyffryn School
Updated: 28/06/2017 08:00
Not measured Not measured Not measured Not measured No Data
Port Talbot Little Warren
Updated: 21/11/2018 18:00
Not measured Not measured Not measured Not measured 28
Low (2)
Port Talbot Margam
Updated: 21/11/2018 17:00
31
Low (1)
17
Low (1)
1
Low (1)
14
Low (2)
17
Low (2)
Port Talbot Prince Street 2
Updated: 21/11/2018 17:00
Not measured Not measured Not measured 11
Low (1)
14
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 21/11/2018 18:00
Not measured Not measured Not measured Not measured 14
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: 21/11/2018 13:00
Not measured 43
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 21/11/2018 07:00
Not measured 49
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 21/11/2018 12:00
Not measured 23
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 21/11/2018 15:00
22
Low (1)
17
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 22/05/2018 12:00
28
Low (1)
49
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 21/11/2018 16:00
Not measured 50
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 19/11/2018 10:00
No Data No Data Not measured No Data Not measured
Swansea Roadside
Updated: 21/11/2018 17:00
Not measured 52
Low (1)
Not measured 13
Low (2)
19
Low (2)
Swansea St Thomas DOAS
Updated: 21/11/2018 16:00
43
Low (2)
54
Low (1)
3
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 21/11/2018 16:00
Not measured 41
Low (1)
Not measured Not measured Not measured
Twynyrodyn
Updated: 05/04/2018 14:00
Not measured Not measured Not measured No Data No Data
V Glamorgan Windsor Road Penarth
Updated: 21/11/2018 06:00
No Data 15
Low (1)
Not measured Not measured No Data
Wrexham
Updated: 21/11/2018 17:00
Not measured 42
Low (1)
6
Low (1)
14
Low (2)
16
Low (1)