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: 07/05/2024 17:00 |
85 Low (3) |
8 Low (1) |
Not measured | Not measured | Not measured |
|
Bridgend Park Street Updated: 07/05/2024 17:00 |
Not measured | 24 Low (1) |
Not measured | Not measured | 12 Low (1) |
|
Caerphilly Blackwood High Street Updated: 07/05/2024 12:00 |
Not measured | 23 Low (1) |
Not measured | Not measured | 10 Low (1) |
|
Caerphilly Fochriw Updated: 07/05/2024 15:00 |
Not measured | Not measured | Not measured | 9 Low (1) |
No Data |
|
Caerphilly Islwyn Road Wattsville Updated: 07/05/2024 17:00 |
Not measured | 24 Low (1) |
Not measured | Not measured | Not measured |
|
Caerphilly White Street Updated: 07/05/2024 12:00 |
Not measured | 23 Low (1) |
Not measured | Not measured | 9 Low (1) |
|
Cardiff Castle Street Updated: 07/05/2024 17:00 |
Not measured | 62 Low (1) |
Not measured | 11 Low (1) |
19 Low (2) |
|
Cardiff Centre Updated: 07/05/2024 17:00 |
84 Low (3) |
17 Low (1) |
1 Low (1) |
12 Low (2) |
13 Low (1) |
|
Cardiff Newport Road Updated: 07/05/2024 17:00 |
Not measured | 22 Low (1) |
Not measured | Not measured | 18 Low (2) |
|
Chepstow A48 Updated: 07/05/2024 17:00 |
Not measured | 49 Low (1) |
Not measured | 13 Low (2) |
20 Low (2) |
|
Cimla Road / Victoria Gardens Updated: 07/05/2024 11:00 |
Not measured | 35 Low (1) |
Not measured | Not measured | Not measured |
|
Cwmbran Crownbridge Updated: 07/05/2024 17:00 |
90 Low (3) |
8 Low (1) |
Not measured | Not measured | 17 Low (2) |
|
Hafod-yr-ynys Hill Roadside Updated: 07/05/2024 17:00 |
Not measured | 32 Low (1) |
Not measured | Not measured | Not measured |
|
Marchlyn Mawr Updated: 07/05/2024 17:00 |
No Data | 3 Low (1) |
Not measured | Not measured | Not measured |
|
Nantgarw Road Updated: 07/05/2024 09:00 |
Not measured | 16 Low (1) |
Not measured | Not measured | Not measured |
|
Narberth Updated: 07/05/2024 17:00 |
76 Low (3) |
2 Low (1) |
1 Low (1) |
7 Low (1) |
10 Low (1) |
|
Newport M4 Junction 25 Updated: 07/05/2024 17:00 |
55 Low (2) |
96 Low (2) |
Not measured | Not measured | Not measured |
|
Newport St Julians Comp School Updated: 07/05/2024 17:00 |
Not measured | 11 Low (1) |
Not measured | 12 Low (2) |
17 Low (2) |
|
Port Talbot Dyffryn School Updated: 07/05/2024 17:00 |
Not measured | Not measured | Not measured | 11 Low (1) |
17 Low (2) |
|
Port Talbot Little Warren Updated: 07/05/2024 17:00 |
Not measured | Not measured | Not measured | 10 Low (1) |
12 Low (1) |
|
Port Talbot Margam Updated: 07/05/2024 17:00 |
71 Low (3) |
6 Low (1) |
2 Low (1) |
11 Low (1) |
32 Low (2) |
|
Port Talbot Prince Street 2 Updated: 07/05/2024 17:00 |
Not measured | Not measured | Not measured | 10 Low (1) |
28 Low (2) |
|
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: 07/05/2024 17:00 |
Not measured | Not measured | Not measured | 10 Low (1) |
14 Low (1) |
|
Rhondda Mountain Ash Updated: 07/05/2024 12:00 |
Not measured | 36 Low (1) |
Not measured | Not measured | Not measured |
|
Rhondda Pontypridd Gelliwastad Rd Updated: 07/05/2024 06:00 |
Not measured | 38 Low (1) |
Not measured | Not measured | Not measured |
|
Rhondda-Cynon-Taf Broadway Updated: 07/05/2024 17:00 |
Not measured | 27 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Cwm Level Park Updated: 04/05/2024 07:00 |
No Data | No Data | Not measured | Not measured | Not measured |
|
Swansea Hafod DOAS Updated: 07/05/2024 15:00 |
62 Low (2) |
2 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Morfa Road NOX Updated: 03/05/2024 13:00 |
Not measured | No Data | Not measured | Not measured | Not measured |
|
Swansea Morriston Roadside Updated: 03/05/2024 11:00 |
No Data | No Data | Not measured | No Data | Not measured |
|
Swansea Port Tennant Roadside Updated: 03/05/2024 07:00 |
Not measured | No Data | Not measured | No Data | Not measured |
|
Swansea Roadside Updated: 07/05/2024 17:00 |
Not measured | 19 Low (1) |
Not measured | 9 Low (1) |
14 Low (1) |
|
Swansea St Thomas DOAS Updated: 07/05/2024 16:00 |
90 Low (3) |
19 Low (1) |
6 Low (1) |
Not measured | Not measured |
|
Swansea Station Court High Street Updated: 03/05/2024 08:00 |
Not measured | No Data | 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: 07/05/2024 17:00 |
Not measured | 20 Low (1) |
3 Low (1) |
10 Low (1) |
15 Low (1) |
|
Wrexham Chirk Updated: 07/05/2024 17:00 |
Not measured | 4 Low (1) |
Not measured | 3 Low (1) |
11 Low (1) |
|
Wrexham Chirk Community Hospital Updated: 07/05/2024 17:00 |
Not measured | 2 Low (1) |
Not measured | 4 Low (1) |
12 Low (1) |