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 25
Low (1)
Not measured Not measured Not measured
Aston Hill
57
Low (2)
3
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 6
Low (1)
Not measured Not measured 12
Low (1)
Caerphilly Fochriw
Not measured Not measured Not measured 4
Low (1)
Not measured
Caerphilly Islwyn Road Wattsville
Not measured 5
Low (1)
Not measured Not measured Not measured
Caerphilly White Street
Not measured Not measured Not measured Not measured 22
Low (2)
Cardiff Castle Street
Not measured 28
Low (1)
Not measured Not measured 20
Low (2)
Cardiff Centre
26
Low (1)
29
Low (1)
1
Low (1)
9
Low (1)
15
Low (1)
Cardiff Newport Road
Not measured 43
Low (1)
Not measured Not measured 19
Low (2)
Chepstow A48
Not measured 29
Low (1)
Not measured 5
Low (1)
17
Low (2)
Cimla Road / Victoria Gardens
Not measured Not measured Not measured Not measured Not measured
Cwmbran Crownbridge
17
Low (1)
27
Low (1)
Not measured Not measured 17
Low (2)
Hafod-yr-ynys Hill Roadside
Not measured 37
Low (1)
Not measured Not measured Not measured
Marchlyn Mawr
Not measured 2
Low (1)
Not measured Not measured Not measured
Nantgarw Road
Not measured 13
Low (1)
Not measured Not measured Not measured
Narberth
67
Low (3)
3
Low (1)
3
Low (1)
4
Low (1)
10
Low (1)
Newport M4 Junction 25
7
Low (1)
Not measured Not measured Not measured Not measured
Newport M4 Junction 25 West
Not measured Not measured Not measured Not measured Not measured
Newport St Julians Comp School
Not measured 25
Low (1)
Not measured 6
Low (1)
12
Low (1)
Port Talbot Dyffryn School
Not measured Not measured Not measured 6
Low (1)
12
Low (1)
Port Talbot Little Warren
Not measured Not measured Not measured 7
Low (1)
15
Low (1)
Port Talbot M4 Junction 41
Not measured 17
Low (1)
Not measured Not measured Not measured
Port Talbot Margam
64
Low (2)
10
Low (1)
1
Low (1)
4
Low (1)
14
Low (1)
Port Talbot Prince Street 2
Not measured Not measured Not measured 6
Low (1)
12
Low (1)
Rhondda Glyncoch Garth Avenue
Not measured Not measured Not measured 10
Low (1)
51
Moderate (4)
Rhondda Mountain Ash
Not measured 17
Low (1)
Not measured Not measured Not measured
Rhondda Pontypridd Gelliwastad Rd
Not measured Not measured 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 15
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
53
Low (2)
47
Low (1)
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 30
Low (1)
Not measured 9
Low (1)
16
Low (1)
Swansea St Thomas DOAS
30
Low (1)
19
Low (1)
2
Low (1)
Not measured Not measured
Swansea Station Court High Street
Not measured Not measured Not measured Not measured Not measured
Wrexham
Not measured 20
Low (1)
2
Low (1)
7
Low (1)
12
Low (1)
Wrexham A483
Not measured 26
Low (1)
Not measured Not measured Not measured
Wrexham Chirk
Not measured 14
Low (1)
Not measured 3
Low (1)
17
Low (2)
Wrexham Chirk Community Hospital
Not measured 12
Low (1)
Not measured 4
Low (1)
13
Low (1)