English: May I thank Llyr and my committee colleagues for their work on this extremely important piece of work? From the conversations I have, and the correspondence I receive, I would suggest there is a growing public concern about the quality of our waterways. There's been a lot of media attention, rightly, on the Severn and Wye rivers, and the impact of pollution from chicken farms, for example. I have called in the past for a moratorium on these developments on a number of occasions, and I will do that again, because, to quote the Minister's letter to us: 'Discharges from combined storm overflowsare not the main cause of poor water quality in Wales - the main causes is runoff from animal waste and chemicals used in agriculture, pollution from disused mines, runoff from built up areas, and sewage pipes being wrongly connected to drainage networks.' Welsh Water's own modelling on the Wye shows that its assets are responsible for 21 per cent of phosphorus in the main water bodies, with combined storm overflows only responsible for 1 per cent. The remainder is caused by those other factors that I've just mentioned. There are certainly overflow issues in my region. Just last week, I was contacted by the Ask About the Arth community project, which is working with Dŵr Cymru, the West Wales Rivers Trust and Ceredigion Birds and Wildlife to reduce overflow into the Arth, and to regain a flag status for Aberarth beach. In 2019-20 raw sewage was pumped for 230 days, and the groups wants that to be reduced down to 60 days. I hope, Minister, that you'll be able to engage with the Ask About the Arth project going forward, and I will be more than happy to put you in touch with that group. On a positive note, there are also examples of very best practice in Mid and West Wales too. The committee did look at Llanelli's innovative Rainscape project, where Welsh Government invested £115 million between 2012 and 2020, and it's delivered around 14 miles of new pipework and curb drainage, as well as a new tunnel and almost 10,000 plants and trees. And it's a superb example of a big infrastructure solution coupled with a nature-based approach. But a small change multiplied many times can be equally effective. Five years ago I led a short debate titled, 'Running off that road, running down that hill', and I'm still proud of that one. It followed up my 2009 legislative proposal to deal with surface water flooding by curbing the use of hard surfaces around people's homes, which the Assembly, at that time, did approve. And it was one of the main recommendations of the Pitt review that followed the devastating floods of 2007, and Members will recall. But 15 years on, these weather events are less exceptional. As Hafren Dyfrdwy noted in their evidence, 'extreme rainfall events are 30% more likely in the next decade'. The fact is, compared to a garden, non-porous paving, tarmac and concrete increases run-off by as much as 50 per cent. And while there are planning restrictions for what can be laid in a front garden, there is very little, if nothing, likewise for the back of the garden and, in my opinion, there ought to be. So, again, I would urge the Minister, if she can, to take up that matter and to be bold in the next planning Bill -
Welsh: A gaf fi ddiolch i Llyr a fy nghyd-Aelodau ar y pwyllgor am eu gwaith ar y mater hynod bwysig hwn? O'r sgyrsiau a gaf, a'r ohebiaeth a gaf, carwn awgrymu bod pryder cynyddol ymhlith y cyhoedd am ansawdd ein dyfrffyrdd. Mae llawer o sylw wedi'i roi yn y cyfryngau, a hynny'n gwbl briodol, i afon Hafren ac afon Gwy, ac effaith llygredd o ffermydd ieir, er enghraifft. Gelwais yn y gorffennol am foratoriwm ar y datblygiadau hyn ar sawl achlysur, a byddaf yn gwneud hynny eto, oherwydd, i ddyfynnu llythyr y Gweinidog atom: 'Nid gollyngiadau o orlifoedd carthffosiaeth cyfunol yw prif achos ansawdd dŵr gwael yng Nghymru - y prif achosion yw dŵr ffo o wastraff anifeiliaid a chemegau a ddefnyddir mewn amaethyddiaeth, llygredd o byllau segur, dŵr ffo o ardaloedd adeiledig, a phibellau carthion yn cael eu cysylltu, yn anghywir, â rhwydweithiau draenio.' Mae gwaith modelu Dŵr Cymru ei hun ar afon Gwy yn dangos bod eu hasedau'n gyfrifol am 21 y cant o'r ffosfforws yn y prif gyrff dŵr, gyda gorlifoedd stormydd cyfunol yn gyfrifol am 1 y cant yn unig. Achosir y gweddill gan y ffactorau eraill rwyf newydd eu crybwyll. Yn sicr, ceir problemau gorlifo yn fy rhanbarth i. Yr wythnos diwethaf, cysylltodd prosiect cymunedol Gofynnwch am yr Arth â mi, sef prosiect sy'n gweithio gyda Dŵr Cymru, Ymddiriedolaeth Afonydd Gorllewin Cymru a Ceredigion Birds and Wildlife i leihau'r gorlif i afon Arth, ac i adennill statws baner ar gyfer traeth Aber-arth. Yn 2019-20, cafodd carthion amrwd eu pwmpio am 230 diwrnod, ac mae'r grwpiau am i hynny gael ei leihau i 60 diwrnod. Weinidog, rwy'n gobeithio y gallwch ymgysylltu â phrosiect Gofynnwch am yr Arth yn y dyfodol, ac rwy'n fwy na pharod i'ch rhoi mewn cysylltiad â'r grŵp hwnnw. Ar nodyn cadarnhaol, ceir enghreifftiau hefyd o arferion da iawn yng Nghanolbarth a Gorllewin Cymru. Edrychodd y pwyllgor ar brosiect GlawLif arloesol Llanelli, lle mae Llywodraeth Cymru wedi buddsoddi £115 miliwn rhwng 2012 a 2020, ac sydd wedi darparu oddeutu 14 milltir o bibellwaith newydd a draeniau yn y cyrbiau, yn ogystal â thwnnel newydd a bron i 10,000 o blanhigion a choed. Ac mae'n enghraifft wych o ateb seilwaith mawr wedi'i baru â dull sy'n seiliedig ar natur. Ond gall newid bach wedi'i luosi sawl gwaith fod yr un mor effeithiol. Bum mlynedd yn ôl, arweiniais ddadl fer o'r enw, 'Dŵr Ffo o'r Mynydd ac ar ein Ffyrdd', ac rwy'n dal yn falch ohoni. Roedd yn dilyn fy nghynnig deddfwriaethol yn 2009 i ymdrin â llifogydd dŵr wyneb drwy gyfyngu ar y defnydd o arwynebau caled o amgylch cartrefi pobl, rhywbeth a gymeradwywyd gan y Cynulliad, fel y'i gelwid ar y pryd. Ac roedd yn un o brif argymhellion adolygiad Pitt a ddilynodd llifogydd dinistriol 2007, ac y bydd yr Aelodau'n eu cofio. Ond 15 mlynedd yn ddiweddarach, mae'r digwyddiadau tywydd hyn yn llai eithriadol. Fel y nododd Hafren Dyfrdwy yn eu tystiolaeth, 'mae digwyddiadau glawiad eithafol 30% yn fwy tebygol yn y degawd nesaf'. Y ffaith amdani yw, o gymharu â gardd, mae cerrig palmant, tarmac a choncrit anhydraidd yn arwain at gynnydd o gymaint â 50 y cant mewn dŵr ffo. Ac er bod cyfyngiadau cynllunio ar yr hyn y gellir ei osod mewn gardd flaen, ychydig iawn, os o gwbl, sy'n bodoli ar gyfer yr ardd gefn, ac yn fy marn i, fe ddylai fod. Felly, unwaith eto, carwn annog y Gweinidog, os gall, i fynd i'r afael â'r mater hwnnw a bod yn feiddgar yn y Bil cynllunio nesaf -