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 Expressway A494 Deeside Updated: 05/10/2024 20:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Aston Hill Updated: 08/10/2024 11:00 |
65 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: 08/10/2024 07:00 |
Not measured | 25 Low (1) |
Not measured | Not measured | 14 Low (1) |
Caerphilly Fochriw Updated: 08/10/2024 09:00 |
Not measured | Not measured | Not measured | 2 Low (1) |
10 Low (1) |
Caerphilly Islwyn Road Wattsville Updated: 08/10/2024 08:00 |
Not measured | 17 Low (1) |
Not measured | Not measured | Not measured |
Caerphilly White Street Updated: 08/10/2024 07:00 |
Not measured | 19 Low (1) |
Not measured | Not measured | 18 Low (2) |
Cardiff Castle Street Updated: 08/10/2024 10:00 |
Not measured | 62 Low (1) |
Not measured | 7 Low (1) |
18 Low (2) |
Cardiff Centre Updated: 08/10/2024 11:00 |
57 Low (2) |
16 Low (1) |
2 Low (1) |
6 Low (1) |
11 Low (1) |
Cardiff Newport Road Updated: 08/10/2024 11:00 |
Not measured | 34 Low (1) |
Not measured | Not measured | 17 Low (2) |
Chepstow A48 Updated: 08/10/2024 09:00 |
Not measured | No data | Not measured | 4 Low (1) |
13 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: 08/10/2024 11:00 |
53 Low (2) |
6 Low (1) |
Not measured | Not measured | 13 Low (1) |
Hafod-yr-ynys Hill Roadside Updated: 08/10/2024 11:00 |
Not measured | 44 Low (1) |
Not measured | Not measured | Not measured |
Marchlyn Mawr Updated: 08/10/2024 10:00 |
No data | 1 Low (1) |
Not measured | Not measured | Not measured |
Nantgarw Road Updated: 08/10/2024 09:00 |
Not measured | 16 Low (1) |
Not measured | Not measured | Not measured |
Narberth Updated: 08/10/2024 11:00 |
74 Low (3) |
2 Low (1) |
4 Low (1) |
5 Low (1) |
10 Low (1) |
Newport M4 Junction 25 Updated: 08/10/2024 11:00 |
17 Low (1) |
41 Low (1) |
Not measured | Not measured | Not measured |
Newport M4 Junction 25 West Updated: 25/08/2024 12:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Newport St Julians Comp School Updated: 08/10/2024 11:00 |
Not measured | 7 Low (1) |
Not measured | 5 Low (1) |
11 Low (1) |
Port Talbot Dyffryn School Updated: 08/10/2024 10:00 |
Not measured | Not measured | Not measured | 6 Low (1) |
11 Low (1) |
Port Talbot Little Warren Updated: 08/10/2024 10:00 |
Not measured | Not measured | Not measured | 5 Low (1) |
14 Low (1) |
Port Talbot M4 Junction 41 Updated: 08/10/2024 10:00 |
Not measured | 20 Low (1) |
Not measured | Not measured | Not measured |
Port Talbot Margam Updated: 08/10/2024 11:00 |
73 Low (3) |
7 Low (1) |
0 Low (1) |
2 Low (1) |
13 Low (1) |
Port Talbot Prince Street 2 Updated: 08/10/2024 10:00 |
Not measured | Not measured | Not measured | 5 Low (1) |
12 Low (1) |
Rhondda Glyncoch Garth Avenue Updated: 08/10/2024 11:00 |
Not measured | Not measured | Not measured | 8 Low (1) |
41 Low (3) |
Rhondda Mountain Ash Updated: 08/10/2024 07:00 |
Not measured | 57 Low (1) |
Not measured | Not measured | Not measured |
Rhondda Pontypridd Gelliwastad Rd Updated: 08/10/2024 06:00 |
Not measured | 40 Low (1) |
Not measured | Not measured | Not measured |
Rhondda-Cynon-Taf Broadway Updated: 07/10/2024 04:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Rhondda-Cynon-Taf Pontypridd A470 Updated: 08/10/2024 10:00 |
Not measured | 28 Low (1) |
Not measured | Not measured | Not measured |
Swansea Cwm Level Park Updated: 08/10/2024 10:00 |
42 Low (2) |
21 Low (1) |
Not measured | Not measured | Not measured |
Swansea Hafod DOAS Updated: 08/10/2024 10:00 |
61 Low (2) |
26 Low (1) |
Not measured | Not measured | Not measured |
Swansea Morfa Road NOX Updated: 23/08/2024 04:00 |
Not measured | No data | Not measured | Not measured | Not measured |
Swansea Morriston Roadside Updated: 27/09/2024 15:00 |
No data | No data | Not measured | No data | Not measured |
Swansea Port Tennant Roadside Updated: 04/10/2024 10:00 |
Not measured | No data | Not measured | 17 Low (2) |
Not measured |
Swansea Roadside Updated: 08/10/2024 11:00 |
Not measured | 18 Low (1) |
Not measured | 4 Low (1) |
14 Low (1) |
Swansea St Thomas DOAS Updated: 08/10/2024 10:00 |
69 Low (3) |
22 Low (1) |
2 Low (1) |
Not measured | Not measured |
Swansea Station Court High Street Updated: 08/10/2024 09:00 |
Not measured | 25 Low (1) |
Not measured | Not measured | Not measured |
Wrexham Updated: 08/10/2024 11:00 |
Not measured | 11 Low (1) |
3 Low (1) |
7 Low (1) |
13 Low (1) |
Wrexham A483 Updated: 08/10/2024 10:00 |
Not measured | 13 Low (1) |
Not measured | Not measured | Not measured |
Wrexham Chirk Updated: 08/10/2024 10:00 |
Not measured | 23 Low (1) |
Not measured | 6 Low (1) |
20 Low (2) |
Wrexham Chirk Community Hospital Updated: 08/10/2024 10:00 |
Not measured | 24 Low (1) |
Not measured | 7 Low (1) |
16 Low (1) |