Overview
- The city opened supervised bathing at Bercy, Grenelle and the bras Marie on Saturday, July 4, running free to the public until the end of August with extended hours.
- Authorities require swimmers to use a buoy or float, ban children under 1.20 m, provide lifeguards and offer whitewater swim lessons to manage currents and crowd safety.
- Water quality will be checked multiple times per day and signaled with a green‑orange‑red flag system, and teams will patrol the quays to spot hydrocarbons and other pollution.
- Independent tests published by Le Figaro with Fluidion and calls from media outlets question the city’s reporting timeliness and demand immediate public release of results.
- Officials point to recent wastewater‑treatment upgrades and boat hookups that stop Parisian sewage discharges into the Seine but warn that upstream contamination and a recent national drowning toll of about 90 since June 19 keep risks high.