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: 13/12/2018 11:00
Not measured Not measured Not measured 4
Isel (1)
7
Isel (1)
Anglesey Felin Cafnan
Updated: 12/12/2018 01:00
Not measured Not measured Not measured No Data No Data
Anglesey Llynfaes
Updated: 13/12/2018 11:00
Not measured Not measured Not measured 5
Isel (1)
11
Isel (1)
Anglesey Penhesgyn 3
Updated: 13/12/2018 11:00
Not measured Not measured Not measured 5
Isel (1)
9
Isel (1)
Aston Hill
Updated: 13/12/2018 14:00
32
Isel (1)
15
Isel (1)
Not measured Not measured Not measured
Caerphilly Blackwood High Street
Updated: 13/12/2018 13:00
Not measured 12
Isel (1)
Not measured Not measured 19
Isel (2)
Caerphilly Fochriw
Updated: 13/12/2018 12:00
Not measured Not measured Not measured 7
Isel (1)
13
Isel (1)
Caerphilly Islwyn Road Wattsville
Updated: 13/12/2018 12:00
Not measured 4
Isel (1)
Not measured Not measured Not measured
Caerphilly White Street
Updated: 13/12/2018 13:00
Not measured 18
Isel (1)
Not measured Not measured 16
Isel (1)
Cardiff Centre
Updated: 13/12/2018 14:00
28
Isel (1)
24
Isel (1)
1
Isel (1)
9
Isel (1)
20
Isel (2)
Cardiff Newport Road
Updated: 13/12/2018 14:00
Not measured 36
Isel (1)
Not measured Not measured 25
Isel (2)
Chepstow A48
Updated: 13/12/2018 14:00
Not measured 29
Isel (1)
Not measured No Data 22
Isel (2)
Cimla Road / Victoria Gardens
Updated: 13/12/2018 07:00
Not measured 20
Isel (1)
Not measured Not measured Not measured
Cwmbran
Updated: 13/12/2018 14:00
33
Isel (1)
15
Isel (1)
Not measured Not measured 14
Isel (1)
Hafod-yr-ynys Roadside
Updated: 13/12/2018 14:00
Not measured 52
Isel (1)
Not measured Not measured Not measured
Marchlyn Mawr
Updated: 25/11/2018 03:00
No Data No Data Not measured Not measured Not measured
Nantgarw Road
Updated: 13/12/2018 10:00
Not measured 33
Isel (1)
Not measured Not measured Not measured
Narberth
Updated: 13/12/2018 14:00
43
Isel (2)
8
Isel (1)
8
Isel (1)
10
Isel (1)
16
Isel (1)
Newport M4 Junction 25
Updated: 13/12/2018 15:00
17
Isel (1)
14
Isel (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Updated: 13/12/2018 13:00
Not measured 22
Isel (1)
Not measured 10
Isel (1)
14
Isel (1)
Port Talbot Dyffryn School
Updated: 28/06/2017 08:00
Not measured Not measured Not measured Not measured No Data
Port Talbot Little Warren
Updated: 13/12/2018 14:00
Not measured Not measured Not measured Not measured 28
Isel (2)
Port Talbot Margam
Updated: 13/12/2018 14:00
35
Isel (2)
19
Isel (1)
1
Isel (1)
9
Isel (1)
15
Isel (1)
Port Talbot Prince Street 2
Updated: 13/12/2018 14:00
Not measured Not measured Not measured 7
Isel (1)
11
Isel (1)
Port Talbot Twll-yn-y-Wal Park
Updated: 13/12/2018 14:00
Not measured Not measured Not measured Not measured 13
Isel (1)
Rhondda Glyncoch Garth Avenue
Updated: 12/10/2018 01:00
Not measured Not measured Not measured Not measured No Data
Rhondda Mountain Ash
Updated: 13/12/2018 13:00
Not measured 35
Isel (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Updated: 13/12/2018 07:00
Not measured 26
Isel (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Updated: 13/12/2018 12:00
Not measured 19
Isel (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Updated: 13/12/2018 12:00
42
Isel (2)
16
Isel (1)
Not measured Not measured Not measured
Swansea Hafod DOAS
Updated: 22/05/2018 12:00
41
Isel (2)
37
Isel (1)
Not measured Not measured Not measured
Swansea Morfa Road NOX
Updated: 13/12/2018 12:00
Not measured 35
Isel (1)
Not measured Not measured Not measured
Swansea Morriston Roadside
Updated: 10/12/2018 12:00
No Data No Data Not measured No Data Not measured
Swansea Roadside
Updated: 13/12/2018 14:00
Not measured 22
Isel (1)
Not measured 8
Isel (1)
18
Isel (2)
Swansea St Thomas DOAS
Updated: 13/12/2018 13:00
53
Isel (2)
34
Isel (1)
2
Isel (1)
Not measured Not measured
Swansea Station Court High Street
Updated: 13/12/2018 13:00
Not measured 40
Isel (1)
Not measured Not measured Not measured
Twynyrodyn
Updated: 30/11/2018 24:00
Not measured Not measured Not measured No Data No Data
V Glamorgan Windsor Road Penarth
Updated: 13/12/2018 06:00
56
Isel (2)
3
Isel (1)
Not measured Not measured 20
Isel (2)
Wrexham
Updated: 27/11/2018 15:00
Not measured No Data No Data No Data No Data