Sioux Center, Iowa — A Sioux Center business appears to be the source of a nine mile long fish-kill along the West Branch of the Floyd river in Sioux County.
Pending lab results, it appears the likely source of the discharge causing the fish kill is Sioux-Preme Packing Company. The company is located just south of Sioux Center at 4241 U.S. 75 Avenue. The DNR continues to investigate the reason for the discharge.
DNR staff found elevated ammonia levels and thousands of dead fish, including game fish, for at least nine miles downstream of the plant. Fisheries staff conducted a second count of dead fish after fish continued to die on Tuesday and Wednesday, and are back on the site today (Thursday).
Sioux-Preme Packing Company has hired a contractor to treat a tributary to the stream where ammonia has concentrated. The DNR will continue to monitor cleanup and will pursue appropriate enforcement action and fish restitution.
The fish kill was reported to the DNR on Monday after a resident noticed stressed fish in the stream last weekend.