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: 22/02/2020 06:00
Not measured Not measured Not measured 34
Low (3)
52
Moderate (4)
Anglesey Llynfaes
Updated: 22/02/2020 06:00
Not measured Not measured Not measured 35
Low (3)
52
Moderate (4)
Anglesey Penhesgyn 3
Updated: 22/02/2020 06:00
Not measured Not measured Not measured 28
Low (3)
40
Low (3)
Aston Hill
Updated: 22/02/2020 10:00
84
Low (3)
No Data Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 22/02/2020 08:00
Not measured 5
Low (1)
Not measured Not measured 18
Low (2)
Caerphilly Fochriw
Updated: 22/02/2020 10:00
Not measured Not measured Not measured 5
Low (1)
11
Low (1)
Caerphilly Islwyn Road Wattsville
Updated: 21/02/2020 15:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly White Street
Updated: 22/02/2020 08:00
Not measured 3
Low (1)
Not measured Not measured 21
Low (2)
Cardiff Centre
Updated: 22/02/2020 10:00
75
Low (3)
11
Low (1)
4
Low (1)
6
Low (1)
22
Low (2)
Cardiff Newport Road
Updated: 22/02/2020 10:00
Not measured 7
Low (1)
Not measured Not measured 22
Low (2)
Chepstow A48
Updated: 22/02/2020 10:00
Not measured 43
Low (1)
Not measured 8
Low (1)
22
Low (2)
Cimla Road / Victoria Gardens
Updated: 22/02/2020 07:00
Not measured 10
Low (1)
Not measured Not measured Not measured
Cwmbran
Updated: 22/02/2020 10:00
83
Low (3)
2
Low (1)
Not measured Not measured 21
Low (2)
Hafod-yr-ynys Roadside
Updated: 22/02/2020 10:00
Not measured 28
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 22/02/2020 10:00
56
Low (2)
2
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 22/02/2020 10:00
Not measured 13
Low (1)
Not measured Not measured Not measured
Narberth
Updated: 22/02/2020 10:00
78
Low (3)
1
Low (1)
2
Low (1)
11
Low (1)
18
Low (2)
Newport M4 Junction 25
Updated: 22/02/2020 11:00
68
Low (3)
20
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 22/02/2020 10:00
Not measured 7
Low (1)
Not measured 10
Low (1)
20
Low (2)
Port Talbot Dyffryn School
Updated: 22/02/2020 09:00
Not measured Not measured Not measured Not measured 47
Low (3)
Port Talbot Little Warren
Updated: 22/02/2020 10:00
Not measured Not measured Not measured Not measured 29
Low (2)
Port Talbot Margam
Updated: 22/02/2020 10:00
71
Low (3)
23
Low (1)
15
Low (1)
22
Low (2)
73
Moderate (6)
Port Talbot Prince Street 2
Updated: 22/02/2020 10:00
Not measured Not measured Not measured 13
Low (2)
42
Low (3)
Port Talbot Twll-yn-y-Wal Park
Updated: 22/02/2020 10:00
Not measured Not measured Not measured Not measured 57
Moderate (4)
Rhondda Glyncoch Garth Avenue
Updated: 22/02/2020 10:00
Not measured Not measured Not measured Not measured 19
Low (2)
Rhondda Mountain Ash
Updated: 21/02/2020 21:00
Not measured Not measured Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 22/02/2020 07:00
Not measured 4
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 22/02/2020 07:00
Not measured 5
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 21/02/2020 08:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: -
Not measured Not measured Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 21/02/2020 09:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: -
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 22/02/2020 08:00
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Updated: 22/02/2020 10:00
Not measured 7
Low (1)
Not measured 10
Low (1)
31
Low (2)
Swansea St Thomas DOAS
Updated: 22/02/2020 09:00
94
Low (3)
23
Low (1)
1
Low (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 22/02/2020 09:00
Not measured 51
Low (1)
Not measured Not measured Not measured
Twynyrodyn
Updated: -
Not measured Not measured Not measured Not measured Not measured
V Glamorgan Windsor Road Penarth
Updated: 22/02/2020 06:00
77
Low (3)
2
Low (1)
Not measured Not measured 24
Low (2)
Wrexham
Updated: 22/02/2020 10:00
Not measured 1
Low (1)
9
Low (1)
3
Low (1)
5
Low (1)