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: 27/07/2024 04:00 |
47 Low (2) |
1 Low (1) |
Not measured | Not measured | Not measured |
Bridgend Park Street Updated: 22/07/2024 10:00 |
Not measured | No data | Not measured | Not measured | No data |
Caerphilly Blackwood High Street Updated: 26/07/2024 18:00 |
Not measured | No data | Not measured | Not measured | No data |
Caerphilly Fochriw Updated: 26/07/2024 21:00 |
Not measured | Not measured | Not measured | No data | No data |
Caerphilly Islwyn Road Wattsville Updated: 26/07/2024 20:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Caerphilly White Street Updated: 26/07/2024 18:00 |
Not measured | No data | Not measured | Not measured | No data |
Cardiff Castle Street Updated: 26/07/2024 21:00 |
Not measured | No data | Not measured | No data | No data |
Cardiff Centre Updated: 27/07/2024 04:00 |
25 Low (1) |
16 Low (1) |
1 Low (1) |
5 Low (1) |
13 Low (1) |
Cardiff Newport Road Updated: 27/07/2024 04:00 |
Not measured | 11 Low (1) |
Not measured | Not measured | 12 Low (1) |
Chepstow A48 Updated: 27/07/2024 04:00 |
Not measured | 5 Low (1) |
Not measured | 6 Low (1) |
14 Low (1) |
Cimla Road / Victoria Gardens Updated: 28/06/2024 09:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Cwmbran Crownbridge Updated: 27/07/2024 04:00 |
35 Low (2) |
9 Low (1) |
Not measured | Not measured | 14 Low (1) |
Hafod-yr-ynys Hill Roadside Updated: 27/07/2024 04:00 |
Not measured | 5 Low (1) |
Not measured | Not measured | Not measured |
Marchlyn Mawr Updated: 26/07/2024 21:00 |
No data | 0 Low (1) |
Not measured | Not measured | Not measured |
Nantgarw Road Updated: 26/07/2024 20:00 |
Not measured | 6 Low (1) |
Not measured | Not measured | Not measured |
Narberth Updated: 27/07/2024 04:00 |
39 Low (2) |
1 Low (1) |
2 Low (1) |
4 Low (1) |
9 Low (1) |
Newport M4 Junction 25 Updated: 26/07/2024 22:00 |
No data | No data | Not measured | Not measured | Not measured |
Newport St Julians Comp School Updated: 27/07/2024 04:00 |
Not measured | 12 Low (1) |
Not measured | 5 Low (1) |
10 Low (1) |
Port Talbot Dyffryn School Updated: 26/07/2024 01:00 |
Not measured | Not measured | Not measured | No data | No data |
Port Talbot Little Warren Updated: 26/07/2024 01:00 |
Not measured | Not measured | Not measured | No data | No data |
Port Talbot Margam Updated: 27/07/2024 04:00 |
32 Low (1) |
4 Low (1) |
1 Low (1) |
9 Low (1) |
19 Low (2) |
Port Talbot Prince Street 2 Updated: 26/07/2024 21:00 |
Not measured | Not measured | Not measured | No data | No data |
Rhondda Glyncoch Garth Avenue Updated: 26/07/2024 22:00 |
Not measured | Not measured | Not measured | No data | No data |
Rhondda Mountain Ash Updated: 26/07/2024 20:00 |
Not measured | 29 Low (1) |
Not measured | Not measured | Not measured |
Rhondda Pontypridd Gelliwastad Rd Updated: 26/07/2024 06:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Rhondda-Cynon-Taf Broadway Updated: 24/07/2024 17:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Swansea Cwm Level Park Updated: 09/07/2024 09:00 |
No data | No data | Not measured | Not measured | Not measured |
Swansea Hafod DOAS Updated: 08/07/2024 24:00 |
No data | No data | Not measured | Not measured | Not measured |
Swansea Morfa Road NOX Updated: 09/07/2024 09:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Swansea Morriston Roadside Updated: 05/07/2024 13:00 |
No data | No data | Not measured | No data | Not measured |
Swansea Port Tennant Roadside Updated: 09/07/2024 06:00 |
Not measured | No data | Not measured | No data | Not measured |
Swansea Roadside Updated: 27/07/2024 04:00 |
Not measured | 10 Low (1) |
Not measured | 6 Low (1) |
11 Low (1) |
Swansea St Thomas DOAS Updated: 09/07/2024 10:00 |
No data | No data | No data | Not measured | Not measured |
Swansea Station Court High Street Updated: 09/07/2024 07:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Wrexham Updated: 27/07/2024 04:00 |
Not measured | 5 Low (1) |
3 Low (1) |
3 Low (1) |
6 Low (1) |
Wrexham Chirk Updated: 30/05/2024 11:00 |
Not measured | No data | Not measured | 4 Low (1) |
15 Low (1) |
Wrexham Chirk Community Hospital Updated: 27/07/2024 04:00 |
Not measured | 7 Low (1) |
Not measured | 4 Low (1) |
11 Low (1) |