That chemical spill tainted the water supply for nearly 300,000 people. Evansville's Water and Sewer Utility is taking several precautions to make sure it doesn't happen here.
Louisville could see traces of the chemical by Friday, then Evansville sometime over the weekend.
"If Louisville has such low levels," said Utility Director Allen Mounts, "we may not need to treat. But if there's any presence of it, we will use a special treatment to purify and remove the chemical from the river."
Local water officials are staying in contact with the coast guard, the EPA and several other agencies monitoring any changes in the water.