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: 22/09/2019 10:00
Not measured Not measured Not measured 5
Low (1)
21
Low (2)
Anglesey Llynfaes
Updated: 22/09/2019 10:00
Not measured Not measured Not measured 6
Low (1)
19
Low (2)
Anglesey Penhesgyn 3
Updated: 22/09/2019 10:00
Not measured Not measured Not measured 5
Low (1)
17
Low (2)
Aston Hill
Updated: 22/09/2019 15:00
60
Low (2)
1
Low (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 22/09/2019 12:00
Not measured 28
Low (1)
Not measured Not measured 22
Low (2)
Caerphilly Fochriw
Updated: 22/09/2019 11:00
Not measured Not measured Not measured 8
Low (1)
15
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 22/09/2019 14:00
Not measured 11
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 21/09/2019 04:00
Not measured No Data Not measured Not measured 18
Low (2)
Cardiff Centre
Updated: 20/09/2019 14:00
Not measured Not measured Not measured Not measured Not measured
Cardiff Newport Road
Updated: 22/09/2019 15:00
Not measured 6
Low (1)
Not measured Not measured 18
Low (2)
Chepstow A48
Updated: 22/09/2019 15:00
Not measured 24
Low (1)
Not measured 14
Low (2)
21
Low (2)
Cimla Road / Victoria Gardens
Updated: 22/09/2019 06:00
Not measured 14
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 22/09/2019 15:00
58
Low (2)
3
Low (1)
Not measured Not measured 19
Low (2)
Hafod-yr-ynys Roadside
Updated: 22/09/2019 15:00
Not measured 37
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 22/09/2019 14:00
No Data 1
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 22/09/2019 09:00
Not measured 10
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 21/09/2019 18:00
Not measured Not measured Not measured Not measured Not measured
Newport M4 Junction 25
Updated: 22/09/2019 15:00
33
Low (1)
33
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 22/09/2019 14:00
Not measured 6
Low (1)
Not measured 10
Low (1)
18
Low (2)
Port Talbot Dyffryn School
Updated: 22/09/2019 14:00
Not measured Not measured Not measured Not measured 22
Low (2)
Port Talbot Little Warren
Updated: 22/09/2019 15:00
Not measured Not measured Not measured Not measured 50
Low (3)
Port Talbot Margam
Updated: 22/09/2019 15:00
62
Low (2)
5
Low (1)
2
Low (1)
10
Low (1)
15
Low (1)
Port Talbot Prince Street 2
Updated: 22/09/2019 15:00
Not measured Not measured Not measured 8
Low (1)
16
Low (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 22/09/2019 15:00
Not measured Not measured Not measured Not measured 17
Low (2)
Rhondda Glyncoch Garth Avenue
Updated: 22/09/2019 15:00
Not measured Not measured Not measured Not measured 17
Low (2)
Rhondda Mountain Ash
Updated: 22/09/2019 12:00
Not measured 27
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 22/09/2019 06:00
Not measured 13
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 22/09/2019 11:00
Not measured 19
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 20/09/2019 13:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 18/09/2019 17:00
51
Low (2)
22
Low (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 20/09/2019 10:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 20/09/2019 12:00
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Updated: 22/09/2019 15:00
Not measured 10
Low (1)
Not measured 9
Low (1)
25
Low (2)
Swansea St Thomas DOAS
Updated: 22/09/2019 14:00
76
Low (3)
22
Low (1)
1
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 20/09/2019 12:00
Not measured Not measured 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: 22/09/2019 05:00
42
Low (2)
4
Low (1)
Not measured Not measured 27
Low (2)
Wrexham
Updated: 22/09/2019 15:00
Not measured 10
Low (1)
No Data 13
Low (2)
20
Low (2)