Mae’r cwmnïau dŵr sy’n gweithredu yng Nghymru – Dŵr Cymru, Dŵr Dyffryn Dyfrdwy a Severn Trent Water – wedi adolygu a diweddaru eu cynlluniau a’u canllawiau yn dilyn tywydd garw’r gaeaf diwethaf. Mae hyn yn cynnwys cael digon o halen a chemegau i drin dŵr yfed ar gyfer y gaeaf.
The water companies operating in Wales – Dwr Cymru Welsh Water, Dee Valley Water and Severn Trent Water – have reviewed and updated their plans and guidance following the severe winter weather last year which includes having a sufficient amount of salt and chemicals for treating drinking water in preparation for the winter period.