CHICO, Calif. — Butte County Public Health has lifted the no-swim advisory for Big Chico Creek after new state testing found no trace of the dangerous strain of E. coli that prompted widespread concern earlier this month.

Officials say recent laboratory results from the California Department of Public Health showed the water flowing into and out of Sycamore Pool is no longer contaminated with E. coli O157, a strain that sickened several people over the summer, including children who were hospitalized.

“It was found in several locations in the creek, and in a lot of popular swimming spots,” said Butte County Health spokesperson Lisa Almaguer.

Since the initial outbreak, the county has repeatedly collected and resampled water, submitting it for state analysis. This week, officials finall

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