Plans are under way for a new giant tunnel to transport sewage away from Windermere, England’s largest lake. The initiative, supported by United Utilities, the Environment Agency, and local campaigners, aims to address the widespread raw sewage and bacterial pollution affecting the lake, which has led to more frequent toxic blue-green algal blooms. As a result, the public has been advised to avoid swimming in the lake.

Context

Modelling indicates that the climate crisis will exacerbate these challenges, with the catchment area expected to experience more intense rainfall in the coming years, placing further pressure on the wastewater infrastructure. The proposed 12-mile (19km) tunnel would transport sewage away from the lake, with treated effluent discharged into either the River Leven or the Irish Sea at Ulverston.

Project Details

  • Estimated Cost: £3.6 billion
  • Impact on Water Bills: United Utilities plans to seek permission from the government to raise customer bills to fund the project, which could add up to £3.17 a month to water bills by 2035.
  • Timeline: The project will enter the detailed design phase, expected to take two years. If permission is granted, completion could occur within seven years.