# Global rise in wild swimming and associated health risks

> Live situation record from CLSTR: https://clstr.news/situations/global-rise-in-wild-swimming-and-associated-health-risks
> Updated: 2026-08-17T14:40:06.000Z. Sources: 2. Developments: 2.

Wild swimming has seen a significant rise in popularity across the UK, Ireland, the US, Australia, and parts of Europe. In the UK and Ireland, the number of regular participants has more than doubled since 2016-17, reaching approximately 543,000 adults by 2023-24. This trend is driven by a desire for adventure and a connection with nature.

However, this surge in popularity coincides with increased health risks. Heavy rainfall, sewage overflows, and agricultural runoff have heightened the presence of pathogens such as E. coli, norovirus, Salmonella, and hepatitis A in rivers and lakes. Health authorities and experts advise swimmers to monitor water conditions, research currents, and use local pollution alerts to minimize the risk of disease and infection.

## Timeline

### 2026-08-17: Wild swimming popularity rises in the UK and Ireland

Wild swimming participation has more than doubled in the UK and Ireland since 2016, with experts highlighting the importance of safety and local water conditions.

2 sources. https://clstr.news/cluster/wild-swimming-popularity-rises-in-the-uk-and-ireland

### 2026-07-26: Wild swimming faces health risks from sewage and flood contamination

Wild swimming’s rise meets heightened health risks from sewage overflows and flood‑related water contamination, prompting hygiene advisories and infrastructure upgrades.

2 sources. https://clstr.news/cluster/wild-swimming-faces-health-risks-from-sewage-and-flood-contamination

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Cite as: Global rise in wild swimming and associated health risks. CLSTR, https://clstr.news/situations/global-rise-in-wild-swimming-and-associated-health-risks