Less than five months to go before the start of the Paris 2024 Olympic Games. Despite the cancellation of a test race last August, the triathlon and open water swimming events must still be held there.

Fueled by recent rainfall, the river level has also increased to the point of flooding certain banks. A brown color which would be due to the heavy rains, but more worryingly, it could also be the consequence of the overflow of part of the sewers, overloaded by the precipitation. Measuring bacteria from colorless feces would be the most reliable indicator.