Overview
- The three supervised swim sites—near Notre Dame, the Eiffel Tower and Bras Marie—are open daily through August 31 at no cost.
- Lifeguards supervise bathers aged 10 or older at scheduled times and assess swimming abilities before granting access.
- Water quality is monitored daily against EU standards, with green and red flags indicating safe conditions.
- A June decree maintains a ban and fines for swimming outside designated areas and allows for site closures after rain or sewer overflows.
- The opening crowns a €1.4 billion Seine cleanup for the Paris Olympics legacy, though independent tests warn bacterial levels remain variable.