According to Paris 2024, adverse weather conditions have led to a significant increase in bacteria levels in the Seine, the venue for the swimming leg of the triathlon events. In response to these concerns, the organizers have opted to shift the schedule to ensure greater certainty for athletes and coaches

Paris 2024 organizers and World Triathlon announced the cancellation of Monday's swimming training session for the upcoming Olympic triathlon events, citing inadequate water quality in the Seine River. The statement revealed that "water quality levels... do not present sufficient guarantees"

Marc Guillaume, the prefect of the Paris region, confirmed the disheartening results. "Samples from the Seine do not meet the standards we will have this summer," he stated, highlighting the ongoing concerns regarding water quality as the Games approach, scheduled from July 26 to August 11

Recent data collected by water charity Surfrider in mid-May revealed E. coli levels surpassing four times the authorized limit, raising alarms about the presence of untreated human waste in the waterway