The Caesars riverboat casino in Indiana has been called on the carpet by state officials for discharging improperly treated sewage into the Ohio River.
Environmental regulators have ordered the casino to submit a plan for correcting the violations, which were caused by restaurant grease and oil entering the riverboat's wastewater treatment system, according to a newspaper report. The pollutants showed up in the river in the form of "floating debris, oil or scum," according to the report.
The casino had no comment, the report said.
Caesars Indiana is owned by Las Vegas-based Park Place Entertainment.