STORM LAKE, Iowa (KCAU) — Early Wednesday morning, wastewater flowed into the city of Storm Lake’s storm sewers for less than an hour.

According to the release, wastewater began flowing into a storm sewer around 2:25 a.m. originating from Tyson Foods. The discharge ended around 2:58 a.m. The Iowa Department of Natural Resources (DNR) said the likely cause was a pump failure in the plant.

The storm sewer empties into a storm water detention basin about a block north of Storm Lake, where Tyson staff began pumping it up. Of the estimated 16,500 gallons released, some of it reached the lake. Tyson staff are working to estimate how much.

Tyson Foods along with the City of Storm Lake collected water samples for testing.

“We took immediate action to contain the accidental release of water from the plant and are working cooperatively with city and state officials as we continue to implement our containment and cleanup measures and further evaluate the matter.”

Statement from Tyson Foods

DNR staff indicated they do not expect environmental issues given the small amount that reached the lake and will monitor the cleanup and consider appropriate enforcement actions.