Federal health experts say they'll talk with West Virginia officials about what lab studies are needed on little-known chemicals that spilled into a water system last month.
Centers for Disease Control and Prevention spokeswoman Bernadette Burden said Wednesday the CDC will reach out to the state about possibly conducting more studies.
Scientists worked with limited animal research when they quickly crafted a chemical standard used to lift a water-use ban about a month ago.
Gov. Earl Ray Tomblin sent the CDC a letter Tuesday requesting more toxicology studies from it. He also asked the CDC to analyze health charts from patients admitted with symptoms that could have resulted from chemical contact.
After the spill into the Elk River, 300,000 people were told not to use their water for days.