Overview

• Three free, lifeguard-supervised Seine baths opened July 5 between Notre-Dame and the Eiffel Tower for the first time since 1923.
• Heavy rain on July 6 triggered red-flag warnings and forced temporary closures over concerns that sewer overflow could compromise water quality.
• The city invested €1.4 billion in new overflow basins, sewer upgrades and household connections to support daily real-time water testing.
• A green-yellow-red flag system informs swimmers of water safety, while strict capacity limits, set hours and required safety gear enforce regulations.
• Officials intend to keep the summer sites operational through August and gradually roll out up to 30 supervised river baths along the Seine.