Officials said that approximately 4.7 million gallons of untreated waste water were released into the river during a tornado outbreak in Ohio.
Hundreds of homes and businesses were destroyed and many more were damaged during the outbreak that saw at least 18 tornadoes touch down in western Ohio.
Dina Pierce is a spokeswoman for the Ohio Environmental Protection Agency. She says existing river water and additional rainfall diluted the sewage and moved it downstream through the Great Miami River. Pierce says for that reason officials didn’t sample the river for contamination.
Federal workers have begun assessing tornado damage.