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: 19/09/2019 05:00
Not measured Not measured Not measured 8
Low (1)
19
Low (2)
Anglesey Llynfaes
Updated: 19/09/2019 05:00
Not measured Not measured Not measured 8
Low (1)
17
Low (2)
Anglesey Penhesgyn 3
Updated: 19/09/2019 05:00
Not measured Not measured Not measured 8
Low (1)
18
Low (2)
Aston Hill
Updated: 19/09/2019 06:00
46
Low (2)
5
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 19/09/2019 03:00
Not measured 6
Low (1)
Not measured Not measured 16
Low (1)
Caerphilly Fochriw
Updated: 18/09/2019 24:00
Not measured Not measured Not measured 6
Low (1)
13
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 19/09/2019 05:00
Not measured 15
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 19/09/2019 03:00
Not measured 12
Low (1)
Not measured Not measured 20
Low (2)
Cardiff Centre
Updated: 19/09/2019 06:00
11
Low (1)
26
Low (1)
4
Low (1)
9
Low (1)
30
Low (2)
Cardiff Newport Road
Updated: 19/09/2019 06:00
Not measured 46
Low (1)
Not measured Not measured 25
Low (2)
Chepstow A48
Updated: 19/09/2019 06:00
Not measured 29
Low (1)
Not measured 12
Low (2)
22
Low (2)
Cimla Road / Victoria Gardens
Updated: 19/09/2019 06:00
Not measured 16
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 19/09/2019 06:00
27
Low (1)
15
Low (1)
Not measured Not measured 20
Low (2)
Hafod-yr-ynys Roadside
Updated: 19/09/2019 06:00
Not measured 110
Low (2)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 19/09/2019 06:00
No Data No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 19/09/2019 04:00
Not measured 11
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 19/09/2019 06:00
41
Low (2)
7
Low (1)
9
Low (1)
6
Low (1)
11
Low (1)
Newport M4 Junction 25
Updated: 19/09/2019 06:00
13
Low (1)
24
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 19/09/2019 05:00
Not measured 33
Low (1)
Not measured 8
Low (1)
16
Low (1)
Port Talbot Dyffryn School
Updated: 19/09/2019 05:00
Not measured Not measured Not measured Not measured 24
Low (2)
Port Talbot Little Warren
Updated: 19/09/2019 06:00
Not measured Not measured Not measured Not measured 19
Low (2)
Port Talbot Margam
Updated: 19/09/2019 06:00
22
Low (1)
22
Low (1)
2
Low (1)
12
Low (2)
25
Low (2)
Port Talbot Prince Street 2
Updated: 19/09/2019 06:00
Not measured Not measured Not measured 10
Low (1)
23
Low (2)
Port Talbot Twll-yn-y-Wal Park
Updated: 19/09/2019 06:00
Not measured Not measured Not measured Not measured 35
Low (3)
Rhondda Glyncoch Garth Avenue
Updated: 19/09/2019 06:00
Not measured Not measured Not measured Not measured 22
Low (2)
Rhondda Mountain Ash
Updated: 19/09/2019 04:00
Not measured 15
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 19/09/2019 06:00
Not measured 18
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 19/09/2019 06:00
Not measured 17
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 19/09/2019 05:00
5
Low (1)
9
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 18/09/2019 17:00
26
Low (1)
28
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 19/09/2019 05:00
Not measured 15
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 17/09/2019 07:00
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Updated: 19/09/2019 06:00
Not measured 31
Low (1)
Not measured 10
Low (1)
26
Low (2)
Swansea St Thomas DOAS
Updated: 19/09/2019 06:00
27
Low (1)
56
Low (1)
3
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 19/09/2019 06:00
Not measured 21
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
V Glamorgan Windsor Road Penarth
Updated: 19/09/2019 05:00
4
Low (1)
14
Low (1)
Not measured Not measured 25
Low (2)
Wrexham
Updated: 19/09/2019 06:00
Not measured 17
Low (1)
No Data 6
Low (1)
11
Low (1)