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£200M Plan to Clean 140M Liters of Sewage from Windermere

March 11, 2025
3 mins read
Representative Image Sourav Niyogi, Photo Source: P.K.Niyogi (CC BY-SA 4.0)
Representative Image Sourav Niyogi, Photo Source: P.K.Niyogi (CC BY-SA 4.0)

Environment Secretary Steve Reed has pledged to clean up Lake Windermere, vowing that “only rainwater” will enter England’s largest lake in the future. This initiative aims to address the severe pollution that has plagued this UNESCO World Heritage Site.

The Pollution Problem

Between 2021 and 2023, over 140 million liters of sewage were discharged into Windermere. These discharges came from storm overflows and outdated infrastructure, causing significant ecological damage. United Utilities was found to have repeatedly discharged millions of liters of raw sewage illegally into the lake over a three-year period.

“It’s wholly unacceptable that this lake was allowed to be contaminated with so much pollution – more than 140 million liters,” Reed told BBC Breakfast.

Economic Stakes

Windermere is vital to the local economy:

  • Attracts 7 million visitors annually
  • Generates £750 million for the local economy
  • Houses more than 14,000 residents
  • Forms a central part of the Lake District National Park

The Cleanup Plan

The government’s “Plan for Change” scheme includes:

  • £200 million from United Utilities to upgrade nine wastewater treatment works
  • Reducing spills from six storm overflows discharging into the lake to two a year by 2030
  • A feasibility study to eliminate all sewage discharges
  • Over £100 billion in private investment for water infrastructure nationwide

United Utilities has already invested £75 million to reduce pollution in the lake.


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Mixed Reception

Matt Staniek, founder of Save Windermere, called the announcement “like a new dawn” for the lake but remains cautious: “This is so far just an objective, it’s a vision, it’s an ambition and we want to see this absolutely concrete. We want to see a legally binding commitment and we’re going to continue [to campaign] until that happens.”

Meanwhile, a disagreement emerged about the lake’s current safety. When asked when Windermere might be safe enough to swim in, Reed suggested it wouldn’t be ready by summer. However, Nigel Wilkinson, managing director of Windermere Lake Cruises, strongly disagreed:

“It’s simply not true and it’s absolutely disastrous for our visitor economy, we have the Windermere Great Swim coming up in June, with up to 10,000 people swimming in the lake. This misinformation is absolutely appalling.”

Official data rated Windermere’s bathing water quality as “excellent” in the last survey in September.

Cost to Consumers

While the initial investment will come from private investors, United Utilities customers will ultimately foot the bill. Over the next five years, their bills will rise by 32% above inflation. Any additional measures identified in the feasibility study could push bills even higher.

Public Pressure

Last year, protests were held outside United Utilities offices, demanding the government compel the company to clean up the lake rather than pay large dividends to shareholders. Water utilities have faced significant fines for repeated and damaging illegal pollution in recent years.

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The problem could worsen as climate change brings more extreme weather, from heavy downpours to droughts, putting additional pressure on water systems.

FAQ

How bad is the pollution in Lake Windermere? Over 140 million liters of sewage were discharged into Windermere between 2021 and 2023. United Utilities illegally dumped millions of liters of raw sewage into the lake over a three-year period. The pollution has contributed to algal blooming in some areas.
Is it safe to swim in Lake Windermere? According to the latest official data from September, Windermere’s bathing water quality was rated “excellent.” Nigel Wilkinson of Windermere Lake Cruises stated the lake is safe for swimming, contradicting Environment Secretary Reed’s suggestion that it wouldn’t be ready for swimming by summer.
What is the government’s plan to clean up the lake? The government’s “Plan for Change” includes a £200 million investment from United Utilities to upgrade nine wastewater treatment works, reducing spills from six storm overflows to two a year by 2030, and a feasibility study to completely eliminate sewage discharges so “only rainwater” enters the lake.
How will this affect water bills? United Utilities customers will see their bills rise by an average of 32% above inflation over the next five years. The costs of any additional measures identified in the feasibility study could increase bills further.
Why is cleaning up Windermere important? Windermere is England’s largest lake and part of the Lake District National Park UNESCO World Heritage Site. It attracts 7 million visitors annually, generating £750 million for the local economy, and is home to more than 14,000 people.
Has United Utilities faced consequences for the pollution? United Utilities and other water companies have been handed large fines for repeated and damaging illegal pollution in recent years. The company recently lost a legal battle to block public access to data about sewage dumping in the lake.

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