Crynodeb 24 Awr

Dangosir y crynodiadau llygryddion uchaf a fesurwyd yn ystod y 24 awr diwethaf ledled Cymru isod. Mae graffiau cryno yn dangos y saith diwrnod diwethaf ar gael ar gyfer pob llygrydd yng ngholofn chwith y tabl.

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 Expressway A494 Deeside
Not measured 56
Low (1)
Not measured Not measured Not measured
Aston Hill
86
Low (3)
7
Low (1)
Not measured Not measured Not measured
Bridgend Park Street
Not measured Not measured Not measured Not measured Not measured
Caerphilly Blackwood High Street
Not measured Not measured Not measured Not measured Not measured
Caerphilly Fochriw
Not measured Not measured Not measured Not measured Not measured
Caerphilly Islwyn Road Wattsville
Not measured 25
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Not measured 46
Low (1)
Not measured Not measured 16
Low (1)
Cardiff Castle Street
Not measured Not measured Not measured 15
Low (2)
31
Low (2)
Cardiff Centre
Not measured Not measured Not measured Not measured Not measured
Cardiff Newport Road
Not measured 56
Low (1)
Not measured Not measured 27
Low (2)
Chepstow A48
Not measured 37
Low (1)
Not measured 12
Low (2)
21
Low (2)
Cimla Road / Victoria Gardens
Not measured Not measured Not measured Not measured Not measured
Cwmbran Crownbridge
89
Low (3)
24
Low (1)
Not measured Not measured 17
Low (2)
Hafod-yr-ynys Hill Roadside
Not measured 42
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Not measured 4
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Not measured 41
Low (1)
Not measured Not measured Not measured
Narberth
88
Low (3)
15
Low (1)
1
Low (1)
14
Low (2)
25
Low (2)
Newport M4 Junction 25
66
Low (2)
58
Low (1)
Not measured Not measured Not measured
Newport M4 Junction 25 West
Not measured 43
Low (1)
Not measured Not measured Not measured
Newport St Julians Comp School
Not measured 33
Low (1)
Not measured 13
Low (2)
19
Low (2)
Port Talbot Dyffryn School
Not measured Not measured Not measured 13
Low (2)
19
Low (2)
Port Talbot Little Warren
Not measured Not measured Not measured 14
Low (2)
26
Low (2)
Port Talbot M4 Junction 41
Not measured 27
Low (1)
Not measured Not measured Not measured
Port Talbot Margam
88
Low (3)
11
Low (1)
2
Low (1)
14
Low (2)
25
Low (2)
Port Talbot Prince Street 2
Not measured Not measured Not measured 14
Low (2)
21
Low (2)
Rhondda Glyncoch Garth Avenue
Not measured Not measured Not measured 16
Low (2)
49
Low (3)
Rhondda Mountain Ash
Not measured 48
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Not measured 40
Low (1)
Not measured Not measured Not measured
Rhondda-Cynon-Taf Broadway
Not measured Not measured Not measured Not measured Not measured
Rhondda-Cynon-Taf Pontypridd A470
Not measured 23
Low (1)
Not measured Not measured Not measured
Swansea Cwm Level Park
Not measured Not measured Not measured Not measured Not measured
Swansea Hafod DOAS
Not measured Not measured Not measured Not measured Not measured
Swansea Morfa Road NOX
Not measured Not measured Not measured Not measured Not measured
Swansea Morriston Roadside
Not measured Not measured Not measured Not measured Not measured
Swansea Port Tennant Roadside
Not measured Not measured Not measured Not measured Not measured
Swansea Roadside
Not measured 33
Low (1)
Not measured 15
Low (2)
26
Low (2)
Swansea St Thomas DOAS
Not measured Not measured Not measured Not measured Not measured
Swansea Station Court High Street
Not measured Not measured Not measured Not measured Not measured
Wrexham
Not measured 24
Low (1)
3
Low (1)
18
Low (2)
24
Low (2)
Wrexham A483
Not measured 17
Low (1)
Not measured Not measured Not measured
Wrexham Chirk
Not measured 21
Low (1)
Not measured Not measured Not measured
Wrexham Chirk Community Hospital
Not measured 20
Low (1)
Not measured 5
Low (1)
11
Low (1)