Current measured levels are shown in the table below - showing concentrations and, where applicable, the corresponding index and bands.
Current Levels
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 |
---|---|---|---|---|---|
Aston Hill Updated: 28/03/2024 23:00 |
81 Low (3) |
1 Low (1) |
Not measured | Not measured | Not measured |
Bridgend Park Street Updated: 28/03/2024 20:00 |
Not measured | 15 Low (1) |
Not measured | Not measured | 7 Low (1) |
Caerphilly Blackwood High Street Updated: 28/03/2024 08:00 |
Not measured | No Data | Not measured | Not measured | 6 Low (1) |
Caerphilly Fochriw Updated: 28/03/2024 22:00 |
Not measured | Not measured | Not measured | 4 Low (1) |
5 Low (1) |
Caerphilly Islwyn Road Wattsville Updated: 28/03/2024 21:00 |
Not measured | 20 Low (1) |
Not measured | Not measured | Not measured |
Caerphilly White Street Updated: 28/03/2024 19:00 |
Not measured | 6 Low (1) |
Not measured | Not measured | 4 Low (1) |
Cardiff Castle Street Updated: 28/03/2024 22:00 |
Not measured | 31 Low (1) |
Not measured | 5 Low (1) |
10 Low (1) |
Cardiff Centre Updated: 28/03/2024 23:00 |
82 Low (3) |
12 Low (1) |
3 Low (1) |
7 Low (1) |
8 Low (1) |
Cardiff Newport Road Updated: 28/03/2024 23:00 |
Not measured | 19 Low (1) |
Not measured | Not measured | 9 Low (1) |
Chepstow A48 Updated: 28/03/2024 23:00 |
Not measured | 21 Low (1) |
Not measured | 6 Low (1) |
8 Low (1) |
Cimla Road / Victoria Gardens Updated: 28/03/2024 22:00 |
Not measured | 40 Low (1) |
Not measured | Not measured | Not measured |
Cwmbran Crownbridge Updated: 28/03/2024 22:00 |
99 Low (3) |
6 Low (1) |
Not measured | Not measured | 9 Low (1) |
Hafod-yr-ynys Hill Roadside Updated: 28/03/2024 22:00 |
Not measured | 39 Low (1) |
Not measured | Not measured | Not measured |
Marchlyn Mawr Updated: 28/03/2024 22:00 |
No Data | 3 Low (1) |
Not measured | Not measured | Not measured |
Nantgarw Road Updated: 28/03/2024 21:00 |
Not measured | 19 Low (1) |
Not measured | Not measured | Not measured |
Narberth Updated: 28/03/2024 23:00 |
75 Low (3) |
2 Low (1) |
2 Low (1) |
2 Low (1) |
5 Low (1) |
Newport M4 Junction 25 Updated: 28/03/2024 23:00 |
57 Low (2) |
37 Low (1) |
Not measured | Not measured | Not measured |
Newport St Julians Comp School Updated: 28/03/2024 23:00 |
Not measured | 13 Low (1) |
Not measured | 3 Low (1) |
7 Low (1) |
Port Talbot Dyffryn School Updated: 28/03/2024 22:00 |
Not measured | Not measured | Not measured | 4 Low (1) |
7 Low (1) |
Port Talbot Little Warren Updated: 28/03/2024 22:00 |
Not measured | Not measured | Not measured | 6 Low (1) |
15 Low (1) |
Port Talbot Margam Updated: 28/03/2024 23:00 |
78 Low (3) |
10 Low (1) |
14 Low (1) |
3 Low (1) |
12 Low (1) |
Port Talbot Prince Street 2 Updated: 28/03/2024 22:00 |
Not measured | Not measured | Not measured | 5 Low (1) |
13 Low (1) |
Port Talbot Twll-yn-y-Wal Park Updated: 18/03/2021 12:00 |
Not measured | Not measured | Not measured | Not measured | No Data |
Rhondda Glyncoch Garth Avenue Updated: 28/03/2024 23:00 |
Not measured | Not measured | Not measured | 3 Low (1) |
10 Low (1) |
Rhondda Mountain Ash Updated: 13/03/2024 08:00 |
Not measured | No Data | Not measured | Not measured | Not measured |
Rhondda Pontypridd Gelliwastad Rd Updated: 28/03/2024 21:00 |
Not measured | 19 Low (1) |
Not measured | Not measured | Not measured |
Rhondda-Cynon-Taf Broadway Updated: 28/03/2024 20:00 |
Not measured | 16 Low (1) |
Not measured | Not measured | Not measured |
Swansea Cwm Level Park Updated: 28/03/2024 22:00 |
76 Low (3) |
16 Low (1) |
Not measured | Not measured | Not measured |
Swansea Hafod DOAS Updated: 28/03/2024 22:00 |
72 Low (3) |
30 Low (1) |
Not measured | Not measured | Not measured |
Swansea Morfa Road NOX Updated: 27/03/2024 10:00 |
Not measured | No Data | Not measured | Not measured | Not measured |
Swansea Morriston Roadside Updated: 27/03/2024 15:00 |
No Data | No Data | Not measured | No Data | Not measured |
Swansea Port Tennant Roadside Updated: 28/03/2024 06:00 |
Not measured | 21 Low (1) |
Not measured | 6 Low (1) |
Not measured |
Swansea Roadside Updated: 28/03/2024 23:00 |
Not measured | 44 Low (1) |
Not measured | 4 Low (1) |
9 Low (1) |
Swansea St Thomas DOAS Updated: 28/03/2024 22:00 |
82 Low (3) |
27 Low (1) |
3 Low (1) |
Not measured | Not measured |
Swansea Station Court High Street Updated: 28/03/2024 07:00 |
Not measured | 44 Low (1) |
Not measured | Not measured | Not measured |
Twynyrodyn Updated: 02/07/2019 24:00 |
Not measured | Not measured | Not measured | No Data | No Data |
Wrexham Updated: 28/03/2024 22:00 |
Not measured | 13 Low (1) |
3 Low (1) |
2 Low (1) |
4 Low (1) |
Wrexham Chirk Updated: 28/03/2024 22:00 |
Not measured | 43 Low (1) |
Not measured | 2 Low (1) |
5 Low (1) |
Wrexham Chirk Community Hospital Updated: 28/03/2024 22:00 |
Not measured | 12 Low (1) |
Not measured | 2 Low (1) |
4 Low (1) |