- Welsh Water's penalty - up from £18.3m for the last financial year - is the fifth largest handed out by Ofwat this time around.
- Another water company, Hafren Dyfrdwy, which covers parts of mid, north and south Wales, has been ordered to pay a penalty of £200,000.
- In 2023, Dŵr Cymru released sewage into rivers, lakes and the sea around Wales for more than 916,000 hours - about 20% of all hours of discharges across Wales and England.
"It is important that politicians are straight with the public, so I can tell you now that there is no quick nor easy fix to this pollution crisis.
“Improvements will take time, detailed plans, and a considerable amount of money.
“The pollution crisis will continue and only be resolved when the infrastructure is updated. To do that Welsh Water need a huge amount of money. As such, how does giving the fine money to customers help address the issue? Surely, it would be more effectively used on infrastructure improvements schemes in Wales.”