The Kern County Health Department issued a press release today stating that the investigation into an E. coli outbreak among several Bakersfield, California-area resident had been traced.

Early speculation about the source of the outbreak indicated that health officials were investigating potential exposure to the E. coli bacterium at a restaurant; however, the press release shows that health officials have pinpointed the exposure as happening at a water slide event.

One child is still hospitalized in fair condition, according to an article from the Bakersfield Californian.