An Indiana Department of Environmental Management investigator has stated the low oxygen levels were more than likely caused by the heat and low water flow.
Indiana Conservation Officers are investigating a fish kill on the Patoka River.
According to the report from the Department of Natural Resources, on Wednesday dead fish were found on the Patoka River from Ell Creek road in Dubois County to County Road 550 South in Pike County. That stretch of the Patoka is approximately 18 river miles long.
Cpl. Trent Stinson, the investigating officer, notified the Indiana Department of Environmental Management (IDEM) of the situation. They sent an official to test the water and those test results indicated low oxygen levels in the water. The cause of the low oxygen is unknown at this time.
No official number of dead fish has been released, but the kill encompasses several species.
According to DNR the investigation is ongoing.