We are investing to make things even better for you and the environment.

Our capital investment programme

At £1.4bn our capital investment programme, in the five-year period up to 2025, is our largest ever and includes the biggest programme of environmental improvements.

Projects include improving the ecology of local rivers such as the Parrett in Somerset and the Stour in Dorset by removing phosphorus and nitrogen – which can affect river water quality.

Our increased investment helps to support and generate economic growth as well as allowing us to meet the demand for new development in our region and increase the resilience of our network, reducing sewer flooding and pollution.

Investment plan pie chart

Investment in our sewerage network

We started work on a new 6.5km pipeline in summer 2019 and plan to finish it by spring 2023, investing £55 million in the future of Bristol.

This pipeline will connect Bristol’s existing trunk sewer in Lawrence Weston to the Frome Valley relief sewer near Cribbs Causeway and will direct waste more efficiently around North Bristol to our water recycling centre in Avonmouth.

Most of the sewer is constructed by tunnelling underground using a tunnel boring machine to reduce the need to dig trenches, which can be disruptive and more expensive.

This sewer is part of our essential long-term sewerage strategy for the next 100 years which will allow for a growing population as well as ongoing and future development in Bristol and South Gloucestershire.

Find out more about our North Bristol relief sewer.

Large piece of sewer tunnelling being lifted by a crane ready to go into the ground

Investment in water supply

We’re progressing with a £50 million project to improve and rebuild Durleigh Water Treatment Centre near Bridgwater as part of our long-term water supply strategy for Somerset.

Work started in 2019 on what was the largest single-value scheme delivered by our Engineering and Sustainable Delivery (ESD) department and the build of two new wetland habitats at the head of Durleigh Reservoir – located west of the treatment centre – was also completed.

As well as bringing significant benefits to wildlife such as amphibians, dragonflies and wild flowers, the wetlands project is designed to filter silt and coarse sediment, helping to improve the raw water quality entering the reservoir, with our catchment delivery team working with local farmers to reduce pesticides and silt entering the watercourse.

Aerial view of Durleigh water treatment centre where works are taking place

Investment to protect the environment

We’re committed to protecting and enhancing ecology in our region’s rivers and improving the quality of the treated wastewater that we release back into the environment from our sites plays a large part in this commitment.

Between 2020 and 2025 we’re investing £155 million in upgrades to our water recycling centres to increase the amount of phosphorus that can be removed from wastewater during the treatment process, meaning less of it will end up in local rivers.

Phosphorus is a substance that is essential for all human, animal and plant life. However, too much of it can damage ecosystems and reduce oxygen levels in rivers. As phosphorus is excreted in human waste, it’s important that we remove as much of it as we can in the treatment process.

Opening sign to Clatworthy reservoir outside on a sunny day

Scheme locations

The map below shows locations across our region where we will be investing in water and wastewater schemes between 2020 and 2025.