Most domestic and non-domestic customers receive and pay for four services:
the supply of drinking water;
the removal and treatment of sewage;
the removal and treatment of draining of private areas such as roofs and car parks (known as surface drainage); and
- the removal and treatment of drainage from public areas such as roads (known as roads or highway drainage).
Some non-domestic customers also dispose of trade effluent through the sewerage system and pay for this service separately.