Paris organizers have granted Olympic open water swimmers permission to train in the Seine River after deeming it safe for use. A two-hour training session was scheduled for swimmers to familiarize themselves with the course through the heart of Paris. However, the participation rate for this session remains uncertain.
Earlier, a test run was canceled due to concerns over fluctuating bacteria levels in the waterway. Despite ongoing efforts to improve water quality, the Seine has been a point of concern throughout the games.
Open water swimmers typically train in controlled pool environments, and given the worries about bacteria levels in the Seine, some athletes may opt to limit their time in the river to the actual event. However, others may choose to use the training session to acclimate themselves to the conditions, including the strong current that has raised additional concerns.
Triathlon events have already taken place in the river, with daily water quality readings impacting the schedule. In case the Seine is deemed unsafe, a backup plan is in place to shift the races to Vaires-sur-Marne Nautical Stadium.
The marathon swims will occur on longer stretches of the river, starting and finishing at the Pont Alexandre III. Marathon swimmers will complete six laps on a 1.67-kilometer course for a total of 10 kilometers.
Organizers express confidence that the marathon swimming events will proceed as planned, citing a favorable weather forecast and positive analysis. Paris Mayor Anne Hidalgo, who swam in the Seine in July to address water quality concerns, remains optimistic about the river's condition.
Swimming in the Seine has been largely prohibited since 1923 due to water toxicity. Paris has invested significantly in infrastructure improvements, amounting to 1.4 billion euros, to enable swimming events in the river. Measures include constructing a basin to capture rainwater, upgrading sewer infrastructure, and enhancing wastewater treatment plants.
Water quality in the Seine is closely tied to weather conditions, with heavy rains leading to elevated bacteria levels. While the Games have seen mostly hot and sunny weather, occasional heavy rainfalls have occurred.
Four triathletes fell ill after competing in the individual races last week, though the exact cause remains uncertain. While most strains of bacteria are harmless, some can cause infections if ingested.
Overall, Paris remains committed to ensuring a safe and successful Olympic experience for all athletes participating in open water swimming events.
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