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: 22/09/2021 05:00
Not measured Not measured Not measured 5
Isel (1)
43
Isel (3)
Anglesey Llynfaes
Updated: 22/09/2021 05:00
Not measured Not measured Not measured 6
Isel (1)
22
Isel (2)
Anglesey Penhesgyn 3
Updated: 22/09/2021 05:00
Not measured Not measured Not measured 7
Isel (1)
14
Isel (1)
Aston Hill
Updated: 22/09/2021 07:00
58
Isel (2)
1
Isel (1)
Not measured Not measured Not measured
Bridgend Park Street
Updated: 20/09/2021 05:00
Not measured No Data Not measured Not measured 16
Isel (1)
Caerphilly Blackwood High Street
Updated: 22/09/2021 07:00
Not measured 17
Isel (1)
Not measured Not measured 16
Isel (1)
Caerphilly Fochriw
Updated: 21/09/2021 24:00
Not measured Not measured Not measured Not measured Not measured
Caerphilly Islwyn Road Wattsville
Updated: 22/09/2021 05:00
Not measured 10
Isel (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 22/09/2021 03:00
Not measured 8
Isel (1)
Not measured Not measured 16
Isel (1)
Cardiff Castle Street
Updated: 22/09/2021 07:00
Not measured 30
Isel (1)
Not measured 7
Isel (1)
16
Isel (1)
Cardiff Centre
Updated: 22/09/2021 07:00
5
Isel (1)
19
Isel (1)
1
Isel (1)
8
Isel (1)
13
Isel (1)
Cardiff Newport Road
Updated: 22/09/2021 07:00
Not measured 27
Isel (1)
Not measured Not measured 19
Isel (2)
Chepstow A48
Updated: 22/09/2021 07:00
Not measured 32
Isel (1)
Not measured 8
Isel (1)
11
Isel (1)
Cimla Road / Victoria Gardens
Updated: 22/09/2021 06:00
Not measured 22
Isel (1)
Not measured Not measured Not measured
Cwmbran Crownbridge
Updated: 22/09/2021 07:00
9
Isel (1)
26
Isel (1)
Not measured Not measured 16
Isel (1)
Hafod-yr-ynys Roadside
Updated: 22/09/2021 07:00
Not measured 142
Isel (3)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 22/09/2021 07:00
59
Isel (2)
No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 16/09/2021 20:00
Not measured Not measured Not measured Not measured Not measured
Narberth
Updated: 22/09/2021 07:00
42
Isel (2)
3
Isel (1)
3
Isel (1)
4
Isel (1)
7
Isel (1)
Newport M4 Junction 25
Updated: 22/09/2021 07:00
2
Isel (1)
18
Isel (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 22/09/2021 07:00
Not measured 27
Isel (1)
Not measured 7
Isel (1)
13
Isel (1)
Port Talbot Dyffryn School
Updated: 21/09/2021 13:00
Not measured Not measured Not measured Not measured Not measured
Port Talbot Little Warren
Updated: 22/09/2021 07:00
Not measured Not measured Not measured Not measured 11
Isel (1)
Port Talbot Margam
Updated: 22/09/2021 07:00
26
Isel (1)
24
Isel (1)
2
Isel (1)
6
Isel (1)
20
Isel (2)
Port Talbot Prince Street 2
Updated: 22/07/2021 16:00
Not measured Not measured Not measured Not measured Not measured
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: 22/09/2021 07:00
Not measured Not measured Not measured Not measured 13
Isel (1)
Rhondda Mountain Ash
Updated: 22/09/2021 07:00
Not measured 40
Isel (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 22/09/2021 06:00
Not measured 17
Isel (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 22/09/2021 06:00
Not measured 15
Isel (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 21/09/2021 17:00
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 22/09/2021 06:00
18
Isel (1)
27
Isel (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 21/09/2021 17:00
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 01/07/2021 07:00
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Updated: 19/09/2021 16:00
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Updated: 22/09/2021 07:00
Not measured 25
Isel (1)
Not measured 14
Isel (2)
17
Isel (2)
Swansea St Thomas DOAS
Updated: 22/09/2021 06:00
14
Isel (1)
36
Isel (1)
2
Isel (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 19/09/2021 16:00
Not measured Not measured 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: 22/09/2021 07:00
Not measured 28
Isel (1)
1
Isel (1)
6
Isel (1)
10
Isel (1)
Wrexham Chirk
Updated: 27/01/2021 01:00
Not measured 18
Isel (1)
Not measured 4
Isel (1)
10
Isel (1)