Paris is working diligently to ensure the River Seine meets Olympic standards for water quality, with Mayor Anne Hidalgo expressing confidence in its cleanliness and promising to demonstrate its safety by swimming there herself. To achieve this goal, the city has invested heavily in new water treatment facilities, including a storage basin and a plant in Champigny-sur-Marne. The mayor plans to host a symbolic ‘big dive’ event in June or July, inviting officials and volunteers to join her in the Seine. Water quality will be closely monitored during the Olympics to ensure the safety of athletes and beachgoers alike. Despite concerns raised by environmental groups, the city maintains that the river will be suitable for swimming during the Games and intends to open certain areas to the public in the summer from 2025 onwards.