Lefelau Presennol

Dangosir y lefelau presennol yn y tabl isod – yn dangos crynodiadau a, lle’n berthnasol, y mynegai a’r bandiau cyfatebol.

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: 11/12/2023 21:00
66
Isel (2)
3
Isel (1)
Not measured Not measured Not measured
Bridgend Park Street
Updated: 11/12/2023 20:00
Not measured 45
Isel (1)
Not measured Not measured No Data
Caerphilly Blackwood High Street
Updated: 11/12/2023 19:00
Not measured 52
Isel (1)
Not measured Not measured 16
Isel (1)
Caerphilly Fochriw
Updated: 11/12/2023 20:00
Not measured Not measured Not measured 4
Isel (1)
8
Isel (1)
Caerphilly Islwyn Road Wattsville
Updated: 11/12/2023 21:00
Not measured 14
Isel (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 11/12/2023 19:00
Not measured 44
Isel (1)
Not measured Not measured 31
Isel (2)
Cardiff Castle Street
Updated: 11/12/2023 21:00
Not measured 42
Isel (1)
Not measured 10
Isel (1)
26
Isel (2)
Cardiff Centre
Updated: 11/12/2023 21:00
44
Isel (2)
16
Isel (1)
1
Isel (1)
10
Isel (1)
20
Isel (2)
Cardiff Newport Road
Updated: 11/12/2023 21:00
Not measured 13
Isel (1)
Not measured Not measured 22
Isel (2)
Chepstow A48
Updated: 11/12/2023 21:00
Not measured 60
Isel (1)
Not measured 7
Isel (1)
20
Isel (2)
Cimla Road / Victoria Gardens
Updated: 11/12/2023 21:00
Not measured 13
Isel (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 11/12/2023 21:00
22
Isel (1)
21
Isel (1)
Not measured Not measured 19
Isel (2)
Hafod-yr-ynys Hill Roadside
Updated: 11/12/2023 21:00
Not measured 38
Isel (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 11/12/2023 21:00
No Data No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 11/12/2023 21:00
Not measured 16
Isel (1)
Not measured Not measured Not measured
Narberth
Updated: 11/12/2023 21:00
81
Isel (3)
2
Isel (1)
4
Isel (1)
6
Isel (1)
11
Isel (1)
Newport M4 Junction 25
Updated: 11/12/2023 21:00
21
Isel (1)
39
Isel (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 11/12/2023 21:00
Not measured 11
Isel (1)
Not measured 7
Isel (1)
16
Isel (1)
Port Talbot Dyffryn School
Updated: 11/12/2023 21:00
Not measured Not measured Not measured 9
Isel (1)
21
Isel (2)
Port Talbot Little Warren
Updated: 08/12/2023 22:00
Not measured Not measured Not measured No Data No Data
Port Talbot Margam
Updated: 11/12/2023 21:00
63
Isel (2)
6
Isel (1)
3
Isel (1)
8
Isel (1)
30
Isel (2)
Port Talbot Prince Street 2
Updated: 11/12/2023 21:00
Not measured Not measured Not measured 10
Isel (1)
30
Isel (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: 10/11/2023 08:00
Not measured Not measured Not measured No Data No Data
Rhondda Mountain Ash
Updated: 11/12/2023 21:00
Not measured 57
Isel (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 11/12/2023 21:00
Not measured 53
Isel (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 11/12/2023 20:00
Not measured 53
Isel (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 11/12/2023 20:00
47
Isel (2)
13
Isel (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 11/12/2023 20:00
52
Isel (2)
36
Isel (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 11/11/2023 11:00
Not measured No Data Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 18/10/2023 16:00
No Data No Data Not measured No Data Not measured
Swansea Port Tennant Roadside
Updated: 10/11/2023 15:00
Not measured No Data Not measured No Data Not measured
Swansea Roadside
Updated: 11/12/2023 21:00
Not measured 29
Isel (1)
Not measured 9
Isel (1)
26
Isel (2)
Swansea St Thomas DOAS
Updated: 11/12/2023 20:00
54
Isel (2)
28
Isel (1)
19
Isel (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 11/12/2023 15:00
Not measured 75
Isel (2)
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: 11/12/2023 21:00
Not measured 31
Isel (1)
4
Isel (1)
4
Isel (1)
6
Isel (1)
Wrexham Chirk
Updated: 11/12/2023 21:00
Not measured 25
Isel (1)
Not measured 3
Isel (1)
7
Isel (1)
Wrexham Chirk Community Hospital
Updated: 11/12/2023 21:00
Not measured 38
Isel (1)
Not measured 3
Isel (1)
6
Isel (1)