Paris, France (AFP) – The first training session for triathletes at the Paris Olympics was scrapped Sunday due to pollution in the River Seine, organisers said.

Following a meeting “on the water quality” and tests, “a joint decision was taken to cancel the swimming part of the triathlon orientation,” a Paris 2024 and World Triathlon statement said.

The River Seine was declared clean enough for swimming in tests from mid-July, but doubts remained as to whether the waters would be fit for competition.

“Paris 2024 and World Triathlon reiterate that the priority is the health of the athletes. The analysis carried out yesterday in the Seine showed water quality levels that… do not present sufficient guarantees to allow the event to take place,” the statement said.

Organisers blamed rain in recent days and said they were “confident” water quality would improve enough before the triathlon competition is due to start on July 30.

In the event of heavy rain, untreated sewage can be washed into the river.

If the quality is below standards a “Plan B” involves postponing the events for a few days or moving the marathon swimming to Vaires-sur-Marne, on the Marne river east of Paris.

On July 17, Paris Mayor Anne Hidalgo swam in the Seine along with Paris 2024 chief organiser Tony Estanguet.

dec/tmt/rsc/mtp

© Agence France-Presse

Featured image credit: Alejandro Aznar | Pexels

Image: The airgun bundles towed behind the SONNE generate short, strong sound pulses that penetrate the sea floor and are reflected by geological layers. Seismometers on the sea floor record these signals in order to analyze the structure of the subsurface
New data for risk assessment of submarine landslidesNews

New data for risk assessment of submarine landslides

Kiel | GEOMARExploring active and passive continental slopesComprehensive Survey and Drilling Programme How dangerous are submarine landslides in deep-sea canyons? To answer this question, the…
SourceSourceFebruary 20, 2025 Full article
Image: engine, aircraft in Frankfurt, Germany
Europe’s green jet fuels see upside in Iran warNews

Europe’s green jet fuels see upside in Iran war

Brussels, Belgium | AFP | Muser NewsDesk At a plant near Frankfurt, in Germany, hydrogen and CO₂ sourced from a chlorine factory and a biogas facility…
SourceSourceMay 31, 2026 Full article
Graphic news (s. climate, science, research, scientists. emission targets, floods, environment)
Countries commit to 6x Global Energy Storage and modernize grid to advance clean energy economyNews

Countries commit to 6x Global Energy Storage and modernize grid to advance clean energy economy

Baku, Azerbaijan | WRI (Corrected)  – At COP29, countries including UK, Uruguay, Belgium and Sweden committed to increasing the amount of global energy storage sixfold…
SourceSourceNovember 15, 2024 Full article