My Wastewater Service

Our sewerage systems collect domestic wastewater from drainage outlets around your home and carry it through a network of underground pipes to our treatment works. Here the effluent is cleaned and returned to the environment.

In some areas these sewers carry wastewater and rainwater in one pipe; combined sewers, and in other areas they carry rainwater and wastewater in separate pipes; separate sewers.

In the eyes of our customers a good sewerage system should be “out-of-sight and out-of-mind” and this is the service that Welsh Water aim to provide 24 hours each day and 365 days a year.

However, sometimes blockages and other faults occur, which we aren’t able to prevent and we need your help to tell us about these.

Occasionally these faults will occur on parts of the drainage system that you are responsible for and it’s important that you understand where your responsibility ends.

In an emergency, call us on

0800 085 3968