Triathlete Hospitalised After Swimming in Polluted Open Water as Welsh Project Tracks Contamination

A triathlete from Carmarthen has described falling seriously ill after swimming in contaminated open water, an experience he says has left him questioning whether he can trust a stretch of coastline he once swam in without hesitation.

Andrew Jones, an experienced competitor who has qualified for this month's Ironman World Championship in Kona, Hawaii, contracted Campylobacter — a bacterial infection — during a training swim. He believes the illness was linked to polluted water at a site he had previously regarded as safe.

The timing could hardly have been worse. Jones fell ill just over a week before what he called one of the biggest races of his life, a period when athletes are typically fine-tuning their preparation and protecting their health.

"It made me very sick, unfortunately," Jones said. He recalled feeling unwell at home on a Sunday evening, with his condition deteriorating rapidly. His temperature climbed, his heart rate spiked, and he found himself shaking uncontrollably, prompting an immediate trip to A&E.

Campylobacter is among the most common causes of stomach-related illness and is frequently associated with contaminated water, undercooked poultry and poor hygiene. For an endurance athlete, the consequences extend well beyond discomfort: dehydration, fatigue and disrupted training can derail months of preparation for a race that requires peak physical condition.

Jones admitted to feeling frustrated by the episode. He noted that swimmers enter open water with confidence, assuming conditions are safe and that the location is a good place to train. The illness, he said, has made him think twice about returning to that particular area.

His experience has emerged as Triathlon Cymru, the national governing body for the sport in Wales, presses ahead with an initiative designed to close a long-standing gap in how water quality is monitored at sporting events. The Safer Blue Spaces project, described as the first of its kind, is deploying small sampling devices on athletes themselves to gather reliable data about the water they swim in.

The project is run in partnership with Swim Wales, Bangor University and Imperial College London, and is funded by the insurance group Admiral. Its approach marks a departure from conventional testing, which typically relies on samples taken at one or two fixed points shortly before an event.

That standard method has recognised limitations. Because it captures only a snapshot of conditions at a limited number of locations, it cannot account for how water quality varies along a race route or changes over the course of a swim. Athletes can therefore be exposed to contamination that pre-race checks never detect.

To address this, competitors at Barry's SWYD Sprint Triathlon in August were pulled aside before the race and fitted with devices roughly the size of a fifty-pence piece, attached to the backs of their wetsuits. The samplers travelled the swimmers' exact route through the water, collecting information that organisers hope will provide a far more accurate picture of what athletes are actually exposed to.

After finishing the swim, competitors moved to the transition area, removed their wetsuits and continued the race, while the technical team cut the devices free and prepared them for laboratory analysis at Bangor University. Kate Herridge, a PhD student working on the project, explained that the next stage involves concentrating the water samples and determining whether any pathogens have attached themselves to the samplers. The samples can then be analysed to detect what is present within them.

Amy Jenner, Triathlon Cymru's head of development, stressed why the data matters. She said that, as an organisation, knowing what is in the water is critically important because the sport places athletes directly into it. She noted that Wales hosts roughly 60 triathlon events every year, making the question of water quality a routine concern rather than a rare one.

Jenner said the funding available for research and testing would allow the governing body to report back to athletes, event organisers, Natural Resources Wales and Public Health Wales, setting out a clearer picture of the state of Welsh waters.

Simon Webb, who organises the Barry SWYD Sprint Triathlon, said it was essential that athletes could compete in the swim leg without facing the risk of becoming ill — a standard that the project's organisers believe cannot be guaranteed through existing monitoring alone.

Triathlon Cymru hopes that, in future, it will be able to share its findings with environmental agencies and water companies, improving collective understanding of what is present in seas, lakes and rivers and helping to drive improvements in water quality. For athletes like Jones, that work carries personal weight: his illness cost him valuable preparation time and left him wary of a location he had once trusted, underlining how directly water pollution can affect the people who rely on it for their sport.