Expanded Swim Advisory in Big Chico Creek Due to E. coli Contamination
Butte County has issued an expanded swim advisory for the entire length of Big Chico Creek due to concerns over E. coli contamination. Initially, the warning was limited to Sycamore Pool within Bidwell Park, but the scope has been broadened following investigations into two additional cases of E. coli upstream in the creek. This decision was made by Butte County Public Health officials on July 18, highlighting the growing concern over water safety.
Public Health Officer Jarett Beaudoin explained that while E. coli is commonly found in natural water sources, the specific strain involved—E. coli O157—is a toxic form that should not be present in high concentrations. He emphasized the importance of identifying the source of this contamination. “We’re trying to actively find what sources this could come from,” Beaudoin said.
The advisory urges residents and visitors to avoid entering the water in Big Chico Creek until further notice. The health department is working closely with several agencies, including the CDC, CDPH, and the City of Chico, to determine the origin of the contamination. Beaudoin noted that tests will be conducted on the water itself, as well as surrounding soil and animal droppings. Although human activity was initially considered a possible cause, current evidence suggests that animals may be responsible for the contamination.
Beaudoin raised several questions about potential sources: “Is this an animal upstream? Is this geese? Is this cattle? Is this deer? Is this a consequence of the park fire? We don’t know, but we’re intending to find out. Hopefully, with this testing, we’ll get a little bit more information about where that’s coming from.”
The situation has had real consequences for local families. Nicole Rivera shared her experience after her nephew contracted E. coli following a swim at One Mile before the original advisory was issued. He was hospitalized for over two weeks at UC Davis Medical Center and has since returned home. Rivera described the emotional toll of watching her nephew endure painful treatments such as dialysis and blood transfusions. “Watching him struggle to stay comfortable in the hospital during three-hour dialysis treatments and blood transfusions has been heartbreaking. No child should have to go through this,” she said.
Despite the growing awareness, testing in Big Chico Creek has not yet begun. Beaudoin stated that the current round of tests will take several weeks to complete. As more data becomes available, further updates will be provided to the public. Until then, residents are encouraged to remain cautious and avoid contact with the water in the affected areas.
This incident underscores the importance of monitoring water quality, especially in recreational areas where people gather for swimming and other activities. The ongoing investigation aims to ensure that the community can return to safe and healthy environments in the future.
