Water network

We supply water to most of Dorset, Somerset and Wiltshire, with every household customer using around 1,000 litres every week – that’s equivalent to filling a large water butt five times.

Our supply network

We continuously invest in our supply network by renewing ageing water mains as well as maintaining and improving facilities that help store and move water around our region to supply our 1.4 million customers.


kilometres of water mains


water sources and treatment centres


service reservoirs and water towers


Every day we work hard to locate and repair leaks on our network to help save water. We are committed to meeting our 15% leakage reduction commitment between 2020 and 2025.

We have reduced leakage to 64.1Ml/d (million litres per day), below the agreed target of 65.1Ml/d for 2020-2021 and repaired 92% against a 90% target of reported leaks by the end of the next working day. We are one of only two companies to commit to fixing as many reported leaks as possible within a single day.

Our year to date figures are:

  • 9,773 repaired leaks between 01/04/2023 and 31/10/2023.
  • 975 customer reported significant leaks repaired by the end of the next working day between 01/04/2023 and 31/10/2023.

Meeting demand

To move water around our region we use our water supply grid. Our £230 million supply grid project was completed in 2018 and allows us to redistribute from areas where there is surplus water to where it is needed most.

This ensures:

  • customers have a more reliable supply
  • we can meet demand for water over the next 25 years without having to develop new water resources
  • less water is abstracted from the environment, so river flows are improved. 

Water resources management plan

How the next 25 years look

We will continue to balance water supplies with water demands to ensure adequate supply for our customers, while also protecting the environment.