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: 20/05/2024 01:00 |
105 Moderate (4) |
6 Low (1) |
Not measured | Not measured | Not measured |
|
Bridgend Park Street Updated: 19/05/2024 19:00 |
Not measured | 16 Low (1) |
Not measured | Not measured | 21 Low (2) |
|
Caerphilly Blackwood High Street Updated: 19/05/2024 22:00 |
Not measured | 14 Low (1) |
Not measured | Not measured | 21 Low (2) |
|
Caerphilly Fochriw Updated: 20/05/2024 01:00 |
Not measured | Not measured | Not measured | 11 Low (1) |
22 Low (2) |
|
Caerphilly Islwyn Road Wattsville Updated: 19/05/2024 20:00 |
Not measured | 16 Low (1) |
Not measured | Not measured | Not measured |
|
Caerphilly White Street Updated: 19/05/2024 22:00 |
Not measured | 34 Low (1) |
Not measured | Not measured | 16 Low (1) |
|
Cardiff Castle Street Updated: 20/05/2024 01:00 |
Not measured | 19 Low (1) |
Not measured | 12 Low (2) |
28 Low (2) |
|
Cardiff Centre Updated: 20/05/2024 01:00 |
99 Low (3) |
8 Low (1) |
1 Low (1) |
13 Low (2) |
24 Low (2) |
|
Cardiff Newport Road Updated: 20/05/2024 01:00 |
Not measured | 16 Low (1) |
Not measured | Not measured | 25 Low (2) |
|
Chepstow A48 Updated: 20/05/2024 01:00 |
Not measured | 7 Low (1) |
Not measured | 11 Low (1) |
24 Low (2) |
|
Cimla Road / Victoria Gardens Updated: 15/05/2024 06:00 |
Not measured | No Data | Not measured | Not measured | Not measured |
|
Cwmbran Crownbridge Updated: 19/05/2024 22:00 |
100 Low (3) |
No Data | Not measured | Not measured | 28 Low (2) |
|
Hafod-yr-ynys Hill Roadside Updated: 19/05/2024 24:00 |
Not measured | 7 Low (1) |
Not measured | Not measured | Not measured |
|
Marchlyn Mawr Updated: 20/05/2024 01:00 |
No Data | 4 Low (1) |
Not measured | Not measured | Not measured |
|
Nantgarw Road Updated: 19/05/2024 24:00 |
Not measured | 7 Low (1) |
Not measured | Not measured | Not measured |
|
Narberth Updated: 20/05/2024 01:00 |
88 Low (3) |
4 Low (1) |
1 Low (1) |
10 Low (1) |
16 Low (1) |
|
Newport M4 Junction 25 Updated: 20/05/2024 02:00 |
59 Low (2) |
14 Low (1) |
Not measured | Not measured | Not measured |
|
Newport St Julians Comp School Updated: 20/05/2024 01:00 |
Not measured | 11 Low (1) |
Not measured | 12 Low (2) |
25 Low (2) |
|
Port Talbot Dyffryn School Updated: 20/05/2024 01:00 |
Not measured | Not measured | Not measured | 17 Low (2) |
28 Low (2) |
|
Port Talbot Little Warren Updated: 20/05/2024 01:00 |
Not measured | Not measured | Not measured | 13 Low (2) |
20 Low (2) |
|
Port Talbot Margam Updated: 20/05/2024 01:00 |
105 Moderate (4) |
4 Low (1) |
1 Low (1) |
15 Low (2) |
37 Low (3) |
|
Port Talbot Prince Street 2 Updated: 20/05/2024 01:00 |
Not measured | Not measured | Not measured | 11 Low (1) |
34 Low (3) |
|
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: 20/05/2024 02:00 |
Not measured | Not measured | Not measured | 11 Low (1) |
21 Low (2) |
|
Rhondda Mountain Ash Updated: 19/05/2024 20:00 |
Not measured | 46 Low (1) |
Not measured | Not measured | Not measured |
|
Rhondda Pontypridd Gelliwastad Rd Updated: 19/05/2024 17:00 |
Not measured | 11 Low (1) |
Not measured | Not measured | Not measured |
|
Rhondda-Cynon-Taf Broadway Updated: 19/05/2024 19:00 |
Not measured | 9 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Cwm Level Park Updated: 18/05/2024 05:00 |
83 Low (3) |
No Data | Not measured | Not measured | Not measured |
|
Swansea Hafod DOAS Updated: 19/05/2024 12:00 |
76 Low (3) |
30 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Morfa Road NOX Updated: 19/05/2024 22:00 |
Not measured | 85 Low (2) |
Not measured | Not measured | Not measured |
|
Swansea Morriston Roadside Updated: 17/05/2024 11:00 |
No Data | No Data | Not measured | No Data | Not measured |
|
Swansea Port Tennant Roadside Updated: 17/05/2024 13:00 |
Not measured | No Data | Not measured | No Data | Not measured |
|
Swansea Roadside Updated: 20/05/2024 01:00 |
Not measured | 11 Low (1) |
Not measured | 15 Low (2) |
23 Low (2) |
|
Swansea St Thomas DOAS Updated: 19/05/2024 24:00 |
105 Moderate (4) |
3 Low (1) |
4 Low (1) |
Not measured | Not measured |
|
Swansea Station Court High Street Updated: 17/05/2024 14:00 |
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: 19/05/2024 24:00 |
Not measured | 13 Low (1) |
2 Low (1) |
10 Low (1) |
18 Low (2) |
|
Wrexham Chirk Updated: 20/05/2024 01:00 |
Not measured | 14 Low (1) |
Not measured | 3 Low (1) |
18 Low (2) |
|
Wrexham Chirk Community Hospital Updated: 20/05/2024 01:00 |
Not measured | 9 Low (1) |
Not measured | 4 Low (1) |
19 Low (2) |