The Guardian: Most of Windermere polluted with sewage bacteria, finds biggest survey of its kind
The Big Windermere Survey, involving 350 volunteers and over 1,000 water samples, has revealed consistently poor water quality across England’s largest lake.
Dangerous bacteria levels – E. coli and intestinal enterococci, both indicators of human sewage, were found at high levels year-round, peaking in summer when the lake is busiest with swimmers and holidaymakers.
Hotspots of pollution – Areas around Ambleside, Bowness, and the south-west shore showed bacterial concentrations consistent with poor bathing water quality, with Bowness Bay recording levels up to seven times higher than the lake’s average.
Phosphorus pollution – Concentrations in the north and south of the lake met only “moderate” standards, fuelling algal blooms that choke aquatic life.
Sources of pollution – Treated and untreated sewage from United Utilities sites, storm overflows, septic tanks, and agricultural runoff.
Wildlife at risk – Rare freshwater species face decline without urgent intervention.
Campaign founder Matt Staniek called the findings “damning,” highlighting that this is the first large-scale study not shaped by vested interests. He urged the new government to honour its pledge to end sewage pollution in Windermere.
The evidence is now undeniable: Windermere is in crisis. Only decisive action can deliver a clean and healthy future for our lake.
