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
Anglesey Brynteg
Updated: 03/01/2023 17:00
Not measured Not measured Not measured Not measured Not measured
Anglesey Llynfaes
Updated: 15/01/2022 24:00
Not measured Not measured Not measured Not measured Not measured
Anglesey Penhesgyn 3
Updated: 03/04/2022 24:00
Not measured Not measured Not measured Not measured Not measured
Aston Hill
Updated: 03/02/2023 09:00
57
Isel (2)
1
Isel (1)
Not measured Not measured Not measured
Bridgend Park Street
Updated: 03/02/2023 08:00
Not measured 29
Isel (1)
Not measured Not measured 17
Isel (2)
Caerphilly Blackwood High Street
Updated: 03/02/2023 08:00
Not measured 23
Isel (1)
Not measured Not measured No Data
Caerphilly Fochriw
Updated: 03/02/2023 08:00
Not measured Not measured Not measured 2
Isel (1)
5
Isel (1)
Caerphilly Islwyn Road Wattsville
Updated: 03/02/2023 09:00
Not measured 39
Isel (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 03/02/2023 08:00
Not measured 24
Isel (1)
Not measured Not measured 13
Isel (1)
Cardiff Castle Street
Updated: 03/02/2023 09:00
Not measured 33
Isel (1)
Not measured 4
Isel (1)
10
Isel (1)
Cardiff Centre
Updated: 02/02/2023 07:00
72
Isel (3)
No Data 2
Isel (1)
4
Isel (1)
11
Isel (1)
Cardiff Newport Road
Updated: 03/02/2023 09:00
Not measured 16
Isel (1)
Not measured Not measured 10
Isel (1)
Chepstow A48
Updated: 03/02/2023 09:00
Not measured 76
Isel (2)
Not measured 7
Isel (1)
13
Isel (1)
Cimla Road / Victoria Gardens
Updated: 03/02/2023 09:00
Not measured 50
Isel (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 03/02/2023 09:00
73
Isel (3)
4
Isel (1)
Not measured Not measured 6
Isel (1)
Hafod-yr-ynys Roadside
Updated: 01/02/2023 04:00
Not measured Not measured Not measured Not measured Not measured
Marchlyn Mawr
Updated: 03/02/2023 09:00
68
Isel (3)
1
Isel (1)
Not measured Not measured Not measured
Nantgarw Road
Updated: 03/02/2023 05:00
Not measured 4
Isel (1)
Not measured Not measured Not measured
Narberth
Updated: 03/02/2023 09:00
75
Isel (3)
2
Isel (1)
No Data 4
Isel (1)
8
Isel (1)
Newport M4 Junction 25
Updated: 03/02/2023 09:00
43
Isel (2)
66
Isel (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 03/02/2023 09:00
Not measured 40
Isel (1)
Not measured 5
Isel (1)
7
Isel (1)
Port Talbot Dyffryn School
Updated: 03/02/2023 09:00
Not measured Not measured Not measured 6
Isel (1)
19
Isel (2)
Port Talbot Little Warren
Updated: 03/02/2023 09:00
Not measured Not measured Not measured 5
Isel (1)
17
Isel (2)
Port Talbot Margam
Updated: 03/02/2023 09:00
75
Isel (3)
11
Isel (1)
No Data 5
Isel (1)
21
Isel (2)
Port Talbot Prince Street 2
Updated: 03/02/2023 09:00
Not measured Not measured Not measured 12
Isel (2)
46
Isel (3)
Port Talbot Twll-yn-y-Wal Park
Updated: 18/03/2021 12:00
Not measured Not measured Not measured Not measured Not measured
Rhondda Glyncoch Garth Avenue
Updated: 28/01/2023 01:00
Not measured Not measured Not measured Not measured Not measured
Rhondda Mountain Ash
Updated: 03/02/2023 08:00
Not measured 54
Isel (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 03/02/2023 07:00
Not measured 55
Isel (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 03/02/2023 07:00
Not measured 29
Isel (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 01/02/2023 21:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 03/02/2023 08:00
82
Isel (3)
26
Isel (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 01/02/2023 22:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 03/01/2023 12:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 02/02/2023 14:00
Not measured 22
Isel (1)
Not measured No Data Not measured
Swansea Roadside
Updated: 03/02/2023 09:00
Not measured 25
Isel (1)
Not measured 5
Isel (1)
12
Isel (1)
Swansea St Thomas DOAS
Updated: 03/02/2023 08:00
70
Isel (3)
15
Isel (1)
1
Isel (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 02/02/2023 15:00
Not measured 60
Isel (1)
Not measured Not measured Not measured
Twynyrodyn
Updated: 02/07/2019 24:00
Not measured Not measured Not measured Not measured Not measured
Wrexham
Updated: 03/02/2023 09:00
Not measured 21
Isel (1)
No Data 2
Isel (1)
5
Isel (1)
Wrexham Chirk
Updated: 03/02/2023 09:00
Not measured 14
Isel (1)
Not measured 3
Isel (1)
7
Isel (1)
Wrexham Chirk Community Hospital
Updated: 03/02/2023 09:00
Not measured 26
Isel (1)
Not measured 3
Isel (1)
4
Isel (1)