Health Concern Sparked After E. coli Found at Extreme Levels in Knysna Estuary

• E. coli contamination was found at 10 out of 14 sampling sites across the Knysna Estuary, a popular tourist destination
• The Knysna Wastewater Treatment Works recorded final effluent discharges exceeding safe E. coli limits by more than 11 times
• The DA blamed failing municipal infrastructure under the ANC-led coalition and pledged an Estuary Recovery Plan ahead of November elections

One of South Africa's most beloved coastal lagoons is in serious trouble. The Knysna Estuary, a protected habitat nestled within the Garden Route National Park, has recorded E. coli contamination levels up to 51 times higher than the limit considered safe for recreational water contact.

A parliamentary reply has confirmed the alarming figures. Of the 14 sampling sites tested across the estuary, 10 failed to meet basic safety standards. The primary culprit identified is the Knysna Wastewater Treatment Works, which discharged effluent with E. coli levels more than 11 times above the legal threshold.

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A health crisis hidden in plain sight

The contamination is not just an environmental concern. E. coli bacteria pose serious risks to human health. Certain strains produce toxins that destroy gut tissue, cause bloody diarrhoea, and trigger haemolytic uraemic syndrome, a condition that can lead to kidney failure. Young children under five, adults over 65, and immunocompromised individuals face the greatest danger. The Centres for Disease Control and Prevention notes that in severe cases, bacteria can enter the bloodstream and cause life-threatening sepsis.

For a town whose economy runs on tourism, the stakes are high. Visitors swim, kayak, and boat in the estuary year-round, often unaware of what is in the water.

DA points fingers

The Democratic Alliance's Knysna branch has characterised the crisis as a direct result of governance failures by the local ANC-led coalition. In a Facebook post dated 26 August 2026, the DA shared a stark visual comparison between the murky, litter-filled waterways under current municipal management and the clean, flowing water bodies in DA-governed Stellenbosch.

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The party announced plans for an Estuary Recovery Plan that would prioritise repairing sewerage pipes and pump stations, as well as ramping up waste collection in informal settlements surrounding the estuary.

Environmental advocates and local business owners have added their voices to the calls for urgent intervention, pointing out that the estuary falls within a protected SANParks habitat and carries significant ecological value.

With local government elections set for 4 November 2026, the condition of the Knysna Estuary has become a central campaign issue, forcing municipal service delivery failures into sharp public focus.

More on environmental issues in South Africa

• Briefly News reported on frustrated Hammanskraal residents who gave the government a deadline to fix their broken water treatment plant.
• KwaZulu-Natal officials warned residents to stay alert as dangerous weather conditions created a growing risk across several areas.
• In another story, experts warned that sewage pollution and failing wastewater systems were pushing Gauteng's rivers towards ecological collapse.

Source: Briefly News