Paris Officials Assure Improved Seine Water Quality for Olympians

The swimming segment of a practice run for the Olympic triathlon was cancelled on Sunday due to concerns about water quality in the Seine River. However, Paris officials remain optimistic that athletes will be able to swim in the river during the actual events this week. The men's triathlon is set for Tuesday, with the women's competition following on Wednesday.

Water Quality Concerns

Triathletes were supposed to get familiar with the course on Sunday, but organisers decided to cancel the swimming leg. Representatives from World Triathlon, city and regional authorities, and other decision-makers met to discuss water quality tests before making this decision. Heavy rain during Friday's Olympic opening ceremony and continued showers on Saturday influenced the decision.

Paris Deputy Mayor Antoine Guillou stated at a news conference, "We've seen what were the dynamics of the Seine over the past few weeks, and that's what makes us confident." He noted that after similar rain events in the past, water quality has returned to safe levels within 24 to 48 hours.

Backup Plans

If water quality concerns persist when race time arrives, organisers have backup plans. The first option is to postpone the triathlon events by a few days. If water quality remains poor, the swimming portion will be cancelled, and athletes will only compete in running and biking.

Swimming in the Seine has been prohibited for over a century due to poor water quality. Paris invested 1.4 billion euros ($1.5 billion) to prepare the river for the Olympics. This includes constructing a giant basin to capture excess rainwater and prevent wastewater from entering the river, renovating sewer infrastructure, and upgrading wastewater treatment plants.

Recent Improvements

Daily water quality tests in early June indicated unsafe levels of E. coli bacteria, but recent improvements have been noted. Paris Mayor Anne Hidalgo even took a dip in the river less than two weeks before Olympic events were set to start, fulfilling a promise to show that the long-polluted waterway was clean enough for swimming competitions.

Paris 2024 spokesperson Anne Descamps echoed this confidence: "We are still very confident with the weather forecast for the next 48 hours, the water quality will improve." She added that thanks to public stakeholders' efforts, significant improvements in water quality have been observed.

Future Events

The marathon swimming event is also expected to take place in the Seine later in the Games. Torin Koos, a spokesperson for World Aquatics, mentioned they would "revisit the water quality of the Seine" closer to these events, which have their training day on August 7.

Despite Sunday's rainfall triggering the use of a basin built near Austerlitz train station—causing it to become about 20% full—officials remain hopeful. Tests by monitoring group Eau de Paris showed acceptable levels as of Tuesday before recent rains.

Paris officials declined to release more current data on Sunday, stating that governing bodies of each sport have these measurements and will decide whether events should proceed in the river.

World Triathlon officials share Paris and Olympic officials' belief that the river will be suitable for swimming on Tuesday and Wednesday. Triathletes are hopeful that conditions will allow them to swim in this iconic waterway.

The extensive measures taken by Paris aim to ensure that athletes can safely compete in both triathlon and marathon swimming events in the Seine River during these Olympic Games.