It urged that anyone with continuing symptoms be evaluated for other medical conditions, and noted that viral gastroenteritis, influenza, the common cold and other infections are all common at this time of year.
A spokeswoman for West Virginia America Water Co. said the company was continuing to flush the system to get rid of pockets of licorice smell that remain. "For us, it's not over until we resolve the odor issue," said Maureen Duffy.
Dr. Tanja Popovic, the director of the CDC's National Center for Environmental Health, told reporters on February 5 that repeated testing had shown the water to be acceptable for all uses.
"What I can say is that with all the scientific evidence that we have, with everything that numerous people have worked on so far, I can say that you can use your water however you like," Popovic said. "You can drink it, you can bathe in it, you can use it how you like."
Tomblin said then that tests had shown levels of less than 10 parts per billion or too low to detect, and that he and his staff had been drinking the water "for the last couple of weeks." But when asked whether he could declare it "100% safe," he said, "No."
"The only thing that we can rely upon is what the experts tell us, and, you know, for all the tests done that's who we've got to depend upon," Tomblin said.
A federal grand jury is probing the spill at Freedom Industries, sources familiar with the grand jury's activities have told CNN.