This claim originates from Mother's Day weekend, May 11th, 2025. Robert F. Kennedy Jr., serving as the U.S. Secretary of Health and Human Services, shared photos on the media platform X of himself and his grandchildren swimming/swanning in Rock Creek, D.C. The National Park Service (NPS) has long prohibited swimming in Rock Creek due to the high levels of bacteria and other infectious pathogens, posing health hazards to humans and pets. A simple search on the NPS website will provide this information.
News sources were quick to cover this, and an expert named Bill Sullivan, PhD, a microbiologist, stated on "Self," a health-oriented website, noted that exposure to pathogens like E. coli, Salmonella, and noroviruses can lead to serious health issues, including gastrointestinal illness and liver failure. The creek’s contamination is exacerbated by sewage overflows and runoff, making it unsafe for recreational activities.
In summary, the claim is supported by multiple sources confirming that Robert F. Kennedy did put not just himself but his grandchildren in danger by swanning in Rock Creek, building up more tension with his title as "the top health official."
https://www.washingtonpost.com/dc-md-va/2025/05/13/kennedy-swimming-rock-creek-sewage
https://www.nps.gov/rocr/index.htm
https://www.self.com/story/microbiologist-rfk-jr-creek-swim-health-risks?