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: 24/05/2019 10:00
Not measured Not measured Not measured 3
Low (1)
16
Low (1)
Anglesey Llynfaes
Updated: 24/05/2019 10:00
Not measured Not measured Not measured 4
Low (1)
14
Low (1)
Anglesey Penhesgyn 3
Updated: 24/05/2019 10:00
Not measured Not measured Not measured 4
Low (1)
10
Low (1)
Aston Hill
Updated: 24/05/2019 12:00
64
Low (2)
3
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 24/05/2019 12:00
Not measured 37
Low (1)
Not measured Not measured 12
Low (1)
Caerphilly Fochriw
Updated: 24/05/2019 11:00
Not measured Not measured Not measured 6
Low (1)
12
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 24/05/2019 11:00
Not measured 20
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 24/05/2019 12:00
Not measured 26
Low (1)
Not measured Not measured 19
Low (2)
Cardiff Centre
Updated: 24/05/2019 12:00
35
Low (2)
32
Low (1)
9
Low (1)
11
Low (1)
18
Low (2)
Cardiff Newport Road
Updated: 24/05/2019 12:00
Not measured 19
Low (1)
Not measured Not measured 15
Low (1)
Chepstow A48
Updated: 24/05/2019 12:00
Not measured 80
Low (2)
Not measured 13
Low (2)
18
Low (2)
Cimla Road / Victoria Gardens
Updated: 24/05/2019 06:00
Not measured 22
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 24/05/2019 12:00
48
Low (2)
7
Low (1)
Not measured Not measured 17
Low (2)
Hafod-yr-ynys Roadside
Updated: 24/05/2019 12:00
Not measured 105
Low (2)
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: 24/05/2019 09:00
Not measured 42
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 24/05/2019 12:00
34
Low (2)
3
Low (1)
1
Low (1)
6
Low (1)
9
Low (1)
Newport M4 Junction 25
Updated: 24/05/2019 13:00
16
Low (1)
30
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 24/05/2019 11:00
Not measured 13
Low (1)
Not measured 6
Low (1)
14
Low (1)
Port Talbot Dyffryn School
Updated: 24/05/2019 01:00
Not measured Not measured Not measured Not measured No Data
Port Talbot Little Warren
Updated: 24/05/2019 13:00
Not measured Not measured Not measured Not measured 14
Low (1)
Port Talbot Margam
Updated: 24/05/2019 12:00
51
Low (2)
22
Low (1)
1
Low (1)
11
Low (1)
23
Low (2)
Port Talbot Prince Street 2
Updated: 24/05/2019 12:00
Not measured Not measured Not measured 10
Low (1)
28
Low (2)
Port Talbot Twll-yn-y-Wal Park
Updated: 24/05/2019 13:00
Not measured Not measured Not measured Not measured 26
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: 24/05/2019 12:00
Not measured 44
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 24/05/2019 06:00
Not measured 24
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 24/05/2019 11:00
Not measured 24
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 24/05/2019 11:00
46
Low (2)
6
Low (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 24/05/2019 11:00
47
Low (2)
44
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 24/05/2019 12:00
Not measured 27
Low (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 20/05/2019 10:00
No Data No Data Not measured No Data Not measured
Swansea Roadside
Updated: 24/05/2019 12:00
Not measured 19
Low (1)
Not measured 11
Low (1)
16
Low (1)
Swansea St Thomas DOAS
Updated: 24/05/2019 12:00
63
Low (2)
24
Low (1)
1
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 24/05/2019 12:00
Not measured 60
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: 24/05/2019 05:00
44
Low (2)
13
Low (1)
Not measured Not measured 17
Low (2)
Wrexham
Updated: 24/05/2019 12:00
Not measured 11
Low (1)
1
Low (1)
7
Low (1)
11
Low (1)