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: 24/03/2019 02:00
Not measured Not measured Not measured 10
Low (1)
19
Low (2)
Anglesey Felin Cafnan
Updated: 24/03/2019 02:00
Not measured Not measured Not measured 10
Low (1)
32
Low (2)
Anglesey Llynfaes
Updated: 24/03/2019 02:00
Not measured Not measured Not measured 11
Low (1)
19
Low (2)
Anglesey Penhesgyn 3
Updated: 24/03/2019 01:00
Not measured Not measured Not measured 12
Low (2)
21
Low (2)
Aston Hill
Updated: 24/03/2019 02:00
74
Low (3)
3
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 23/03/2019 23:00
Not measured 26
Low (1)
Not measured Not measured 17
Low (2)
Caerphilly Fochriw
Updated: 24/03/2019 01:00
Not measured Not measured Not measured 8
Low (1)
17
Low (2)
Caerphilly Islwyn Road Wattsville
Updated: 23/03/2019 21:00
Not measured 25
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 23/03/2019 23:00
Not measured 59
Low (1)
Not measured Not measured 33
Low (2)
Cardiff Centre
Updated: 24/03/2019 02:00
48
Low (2)
27
Low (1)
3
Low (1)
22
Low (2)
33
Low (2)
Cardiff Newport Road
Updated: 24/03/2019 02:00
Not measured 33
Low (1)
Not measured Not measured 26
Low (2)
Chepstow A48
Updated: 24/03/2019 02:00
Not measured 22
Low (1)
Not measured 12
Low (2)
25
Low (2)
Cimla Road / Victoria Gardens
Updated: 23/03/2019 07:00
Not measured 18
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 24/03/2019 02:00
61
Low (2)
10
Low (1)
Not measured Not measured 21
Low (2)
Hafod-yr-ynys Roadside
Updated: 24/03/2019 02:00
Not measured 32
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: 24/03/2019 01:00
Not measured 11
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 24/03/2019 02:00
59
Low (2)
5
Low (1)
3
Low (1)
7
Low (1)
14
Low (1)
Newport M4 Junction 25
Updated: 24/03/2019 02:00
27
Low (1)
13
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 24/03/2019 01:00
Not measured 18
Low (1)
Not measured 11
Low (1)
18
Low (2)
Port Talbot Dyffryn School
Updated: 24/03/2019 01:00
Not measured Not measured Not measured Not measured 15
Low (1)
Port Talbot Little Warren
Updated: 24/03/2019 01:00
Not measured Not measured Not measured Not measured 15
Low (1)
Port Talbot Margam
Updated: 24/03/2019 02:00
52
Low (2)
13
Low (1)
1
Low (1)
9
Low (1)
16
Low (1)
Port Talbot Prince Street 2
Updated: 24/03/2019 01:00
Not measured Not measured Not measured 6
Low (1)
12
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 24/03/2019 01:00
Not measured Not measured Not measured Not measured 17
Low (2)
Rhondda Glyncoch Garth Avenue
Updated: 12/10/2018 01:00
Not measured Not measured Not measured Not measured No Data
Rhondda Mountain Ash
Updated: 23/03/2019 21:00
Not measured 63
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 23/03/2019 07:00
Not measured 19
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 23/03/2019 20:00
Not measured 28
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 23/03/2019 22:00
No Data No Data Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 23/03/2019 24:00
37
Low (2)
51
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 23/03/2019 24:00
Not measured 35
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 22/03/2019 09:00
No Data No Data Not measured No Data Not measured
Swansea Roadside
Updated: 24/03/2019 02:00
Not measured 20
Low (1)
Not measured 9
Low (1)
17
Low (2)
Swansea St Thomas DOAS
Updated: 23/03/2019 24:00
63
Low (2)
34
Low (1)
2
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 23/03/2019 21:00
Not measured No Data Not measured Not measured Not measured
Twynyrodyn
Updated: 30/11/2018 24:00
Not measured Not measured Not measured No Data No Data
V Glamorgan Windsor Road Penarth
Updated: 24/03/2019 01:00
22
Low (1)
35
Low (1)
Not measured Not measured 24
Low (2)
Wrexham
Updated: 24/03/2019 02:00
Not measured 19
Low (1)
3
Low (1)
7
Low (1)
14
Low (1)