Welsh Water is the regulated company that provides water supply and sewerage services to over three million people living and working in Wales and some adjoining areas of England. We have 1.2 million household customers and over 110,000 business customers making us the sixth largest of the 23 regulated water companies in England and Wales.

We operate 81reservoirs, 105 water treatment works and supply an average 900 million litres of water every day through a network of 27,000km of water mains, including 532 pumping stations and 715 service reservoirs. We also collect waste water (including surface water and highway drainage) through a network of 19,000km of sewers, incorporating 1,700 sewage pumping stations and 3,300 combined sewer overflows. It is treated at 832 wastewater treatment works located next to rivers and along the coast of Wales.

Our primary responsibility is to operate, maintain and upgrade this large network of assets to ensure a safe and reliable drinking water supply and to deal effectively with waste water so as to protect the environment.