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Rheoliadau Dŵr Mwynol Naturiol, Dŵr Ffynnon a Dŵr Yfed wedi’i Botelu (Cymru) 2015

Newidiadau dros amser i: RHAN 2

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Golwg cyfnod mewn amser fel yr oedd ar 28/11/2015.

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Mae newidiadau yn dal heb eu gwneud i Rheoliadau Dŵr Mwynol Naturiol, Dŵr Ffynnon a Dŵr Yfed wedi’i Botelu (Cymru) 2015. Mae unrhyw newidiadau sydd wedi cael eu gwneud yn barod gan y tîm yn ymddangos yn y cynnwys a chyfeirir atynt gydag anodiadau. Help about Changes to Legislation

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Nid yw newidiadau ac effeithiau sydd eto i'w gwneud gan y tîm golygyddol ond yn berthnasol wrth edrych ar y fersiwn ddiweddaraf neu fersiwn ragolygol o ddeddfwriaeth. Felly, nid oes modd eu gweld wrth edrych ar ddeddfwriaeth fel y mae ar bwynt penodol mewn amser. Er mwyn gweld yr wybodaeth 'Newidiadau i Ddeddfwriaeth' ar gyfer y ddarpariaeth hon ewch yn ôl i'r fersiwn ddiweddaraf gan ddefnyddio'r opsiynau yn y blwch 'Pa Fersiwn' uchod.

RHAN 2LL+CGwerthoedd paramedrig ar gyfer paramedrau microbiolegol a chemegol

Gwybodaeth Cychwyn

I1Atod. 7 Rhn. 2 mewn grym ar 28.11.2015, gweler rhl. 1(2)

Tabl A: Paramedrau Microbiolegol

EitemParamedrUnedau MesurCrynodiad neu Werth Mwyaf
(1)

Dylid mesur y cyfanswm cyfrif cytref hyfyw o fewn 12 awr ar ôl potelu, gan gadw’r sampl dŵr ar dymheredd cyson yn ystod y cyfnod hwnnw o 12 awr. Ni ddylai unrhyw gynnydd yng nghyfanswm cyfrif cytref hyfyw’r dŵr rhwng y 12 awr ar ôl ei botelu ac adeg y gwerthu fod yn fwy na’r hyn a ddisgwylir yn arferol.

(2)

Mewn 72 awr ar agar-agar neu gymysgedd o agar-gelatin.

(3)

Mewn 24 awr ar agar-agar.

1.

Escherichia coli

(E coli)

nifer/250 ml0/250 ml
2.Enterococinifer/250 ml0/250 ml
3.Pseudomonas aeruginosanifer/250ml0/250 ml
4.Cyfrif cytref 22ºCnifer/ml100/ml (1) (2)
5.Cyfrif cytref 37ºCnifer/ml20/ml(1) (3)

Tabl B: Paramedrau Cemegol

EitemParamedrUnedau MesurCrynodiad neu Werth Mwyaf
(1)

Mae’r gwerth paramedrig yn cyfeirio at y crynodiad monomer gweddilliol yn y dŵr fel y’i cyfrifir yn unol â manylebau mwyafswm y gollyngiad o’r polymer cyfatebol sydd mewn cyffyrddiad â’r dŵr.

(2)

Rhaid i grynodiad (mg/l) nitrad wedi’i rannu â 50 a ychwanegir i grynodiad (mg/l) o nitrid wedi’i rannu â 3 beidio â bod yn fwy nag 1.

(3)

Ystyr “Plaleiddiad” yw:

– pryfleiddiad organig,
– chwynleiddiad organig,
– ffyngleiddiad organig,
– nematoleiddiad organig,
– gwiddonleiddiaid organig,
– algaleiddiaid organig,
– llygodleiddiaid organig,
– llysnafeddleiddiaid organig, a
– cynhyrchion perthynol (inter alia, rheoleiddwyr tyfiant) a’u metabolion, eu cynnyrch diraddio ac adweithio perthnasol.
Dim ond y plaleiddiaid hynny sy’n debygol o fod yn bresennol mewn dŵr penodol sydd angen eu monitro.
(4)

Mae mwyafswm crynodiad yn gymwys i bob plaleiddiad unigol. Yn achos aldrin, deueldrin, heptaclor a heptaclor epocsid mwyafswm y crynodiad yw 0.030 μg/l.

(5)

Mae mwyafswm y crynodiad ar gyfer “cyfanswm y sylweddau” yn cyfeirio at swm y crynodiadau o bob plaleiddiad unigol a ganfyddir ac a feintolir yn y weithdrefn fonitro.

(6)

Y cyfansoddion penodedig yw benso(b)fflworanthen, benso(k)fflworanthen, benso(ghi)perylen, indeno(1.2,3-cd) pyren.

(7)

Mae’r crynodiad mwyaf a bennir yn gymwys i swm crynodiadau’r paramedrau penodedig.

1.Acrylamidµg/l0.10 (1)
2.Antimoniµg Sb/l5
3.Arsenigµg As/l10
4.Bensenµg/l1.0
5.Benso (a) pyrenµg/l0.010
6.Boronmg/l1.0
7.Bromadµg/l BrO3/l10
8.Cadmiwmµg Cd/l5
9.Cromiwmµg Cr/l50
10.Coprmg Cu/l2
11.Cyanidµg CN/l50
12.1,2-dicloroethanµg/l3.0
13.Epicolorohydrinµg/l0.10 (1)
14.Fflworidmg F/l1.5
15.Plwmµg Pb/l10
16.Mercwriµg Hg/l1
17.Nicelµg Ni/l20
18.Nitradmg NO3/l50 (2)
19.Nitridmg NO2/l0.5 (2)
20.Plaleiddiaid a chynhyrchion perthynol:
- sylweddau unigolµg/l0.10 (3) (4)
- cyfanswm y sylweddauµg/l0.50 (3) (5)
21.Hydrocarbonau aromatig polysycligµg/l0.1 swm crynodiadau cyfansoddion penodedig (6)
22.Seleniwmµg Se/l10
23.Tetracloroethen a Thricloroethenµg/l10 (7)
24.

Tricloromethen,

Dicolrorbromomethan, Dibromocolromethan a Thribromomethan

µg/l100 (7)
25.Finyl cloridµg/l0.50 (1)

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