A Dŵr Cymru Welsh Water spokesperson said it was investing more than £20m to redevelop the Cardigan Wastewater Treatment works, which is known to be a major contributor to spills in the Teifi.
An additional £5m will be spent on three other Teifi sites to improve the river’s water quality.
It added: “The main reason for the problems on the Teifi is phosphate pollution, 66 per cent of that polluting load comes from land use and agriculture, 30 per cent from treatment works and three per cent of the problem is from storm overflows.”
With over 2,300 storms overlflows in Wales due to its high number of assets, rural infrastructure, and heavy rainfall, Dŵr Cymru Welsh Water said it was committed to improving the environment.
The company plans to invest £2.5bn over the next five years, including £889m to investigate and improve storm overflows.
