Katie Grimes, an 18-year-old American swimmer, expressed her mixed feelings about competing in the Seine River during the Paris 2024 Olympics, where she won a silver medal in the women's 400-meter medley and placed 15th in the 10km marathon swim. Despite the extensive efforts and $1.5 billion investment by French officials to clean the heavily polluted river, Grimes admitted to being nervous about the water quality prior to her race. However, once in the water, her concerns subsided, and she reported no health issues after competing. Other athletes experienced health problems, but Grimes maintained that her experience was enjoyable and historic. She humorously stated she hopes not to swim in the Seine again but acknowledged the fun she had at the Games. The event was marked by notable incidents, including a postponed men's triathlon due to water quality concerns and some competitors falling ill.