Authorities are cautioning McGregor residents to keep away from a wastewater discharge.


About 10,000 gallons of untreated wastewater flowed into the Mississippi River in Clayton County early Tuesday morning (May 12).

The operator of McGregor's wastewater treatment plant found the discharge Tuesday morning, and stopped the leak at about 8am. According to the plant manager, the discharge may have started early in the morning. It was caused by a valve that became plugged with rags.

The 10,000 gallons of untreated wastewater flowed over the yard of a nearby summer home, then entered the Mississippi River on the south side of McGregor.

As a precaution, the Iowa DNR advised residents to keep children and pets away from the discharge area, for 24 to 48 hours.

Last month (April 18) the DNR was called to investigate a fish kill on Bloody Run Creek, west of Marquette. The origin of that pollution was being investigated and had not been released.