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: 25/04/2024 06:00 |
81 Low (3) |
1 Low (1) |
Not measured | Not measured | Not measured |
|
Bridgend Park Street Updated: 22/04/2024 10:00 |
Not measured | No Data | Not measured | Not measured | 14 Low (1) |
|
Caerphilly Blackwood High Street Updated: 25/04/2024 03:00 |
Not measured | 7 Low (1) |
Not measured | Not measured | 15 Low (1) |
|
Caerphilly Fochriw Updated: 25/04/2024 05:00 |
Not measured | Not measured | Not measured | 7 Low (1) |
14 Low (1) |
|
Caerphilly Islwyn Road Wattsville Updated: 25/04/2024 05:00 |
Not measured | 11 Low (1) |
Not measured | Not measured | Not measured |
|
Caerphilly White Street Updated: 25/04/2024 03:00 |
Not measured | 6 Low (1) |
Not measured | Not measured | 16 Low (1) |
|
Cardiff Castle Street Updated: 25/04/2024 06:00 |
Not measured | 27 Low (1) |
Not measured | 9 Low (1) |
20 Low (2) |
|
Cardiff Centre Updated: 25/04/2024 06:00 |
45 Low (2) |
24 Low (1) |
1 Low (1) |
9 Low (1) |
16 Low (1) |
|
Cardiff Newport Road Updated: 25/04/2024 06:00 |
Not measured | 29 Low (1) |
Not measured | Not measured | 20 Low (2) |
|
Chepstow A48 Updated: 25/04/2024 06:00 |
Not measured | 47 Low (1) |
Not measured | 10 Low (1) |
18 Low (2) |
|
Cimla Road / Victoria Gardens Updated: 25/04/2024 06:00 |
Not measured | 20 Low (1) |
Not measured | Not measured | Not measured |
|
Cwmbran Crownbridge Updated: 25/04/2024 06:00 |
53 Low (2) |
24 Low (1) |
Not measured | Not measured | 18 Low (2) |
|
Hafod-yr-ynys Hill Roadside Updated: 25/04/2024 06:00 |
Not measured | 48 Low (1) |
Not measured | Not measured | Not measured |
|
Marchlyn Mawr Updated: 25/04/2024 06:00 |
No Data | 1 Low (1) |
Not measured | Not measured | Not measured |
|
Nantgarw Road Updated: 25/04/2024 04:00 |
Not measured | 1 Low (1) |
Not measured | Not measured | Not measured |
|
Narberth Updated: 25/04/2024 06:00 |
62 Low (2) |
6 Low (1) |
1 Low (1) |
6 Low (1) |
11 Low (1) |
|
Newport M4 Junction 25 Updated: 25/04/2024 06:00 |
28 Low (1) |
51 Low (1) |
Not measured | Not measured | Not measured |
|
Newport St Julians Comp School Updated: 25/04/2024 06:00 |
Not measured | 46 Low (1) |
Not measured | 8 Low (1) |
15 Low (1) |
|
Port Talbot Dyffryn School Updated: 25/04/2024 06:00 |
Not measured | Not measured | Not measured | 10 Low (1) |
14 Low (1) |
|
Port Talbot Little Warren Updated: 25/04/2024 06:00 |
Not measured | Not measured | Not measured | 8 Low (1) |
15 Low (1) |
|
Port Talbot Margam Updated: 25/04/2024 06:00 |
54 Low (2) |
19 Low (1) |
1 Low (1) |
5 Low (1) |
16 Low (1) |
|
Port Talbot Prince Street 2 Updated: 25/04/2024 06:00 |
Not measured | Not measured | Not measured | 7 Low (1) |
25 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: 25/04/2024 06:00 |
Not measured | Not measured | Not measured | 8 Low (1) |
16 Low (1) |
|
Rhondda Mountain Ash Updated: 25/04/2024 04:00 |
Not measured | 20 Low (1) |
Not measured | Not measured | Not measured |
|
Rhondda Pontypridd Gelliwastad Rd Updated: 24/04/2024 20:00 |
Not measured | 33 Low (1) |
Not measured | Not measured | Not measured |
|
Rhondda-Cynon-Taf Broadway Updated: 25/04/2024 06:00 |
Not measured | 33 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Cwm Level Park Updated: 25/04/2024 05:00 |
41 Low (2) |
36 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Hafod DOAS Updated: 25/04/2024 05:00 |
50 Low (2) |
40 Low (1) |
Not measured | Not measured | Not measured |
|
Swansea Morfa Road NOX Updated: 16/04/2024 09:00 |
Not measured | No Data | Not measured | Not measured | Not measured |
|
Swansea Morriston Roadside Updated: 19/04/2024 04:00 |
No Data | No Data | Not measured | No Data | Not measured |
|
Swansea Port Tennant Roadside Updated: 24/04/2024 13:00 |
Not measured | 32 Low (1) |
Not measured | 11 Low (1) |
Not measured |
|
Swansea Roadside Updated: 25/04/2024 06:00 |
Not measured | 29 Low (1) |
Not measured | 6 Low (1) |
14 Low (1) |
|
Swansea St Thomas DOAS Updated: 25/04/2024 05:00 |
36 Low (2) |
47 Low (1) |
5 Low (1) |
Not measured | Not measured |
|
Swansea Station Court High Street Updated: 24/04/2024 14:00 |
Not measured | 50 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: 25/04/2024 06:00 |
Not measured | 5 Low (1) |
1 Low (1) |
5 Low (1) |
10 Low (1) |
|
Wrexham Chirk Updated: 25/04/2024 06:00 |
Not measured | 26 Low (1) |
Not measured | 6 Low (1) |
19 Low (2) |
|
Wrexham Chirk Community Hospital Updated: 25/04/2024 06:00 |
Not measured | 5 Low (1) |
Not measured | 8 Low (1) |
20 Low (2) |