Cleanup efforts are underway after a large amount of fertilizer was spilled into a southwest Iowa river.
The Iowa DNR says New Cooperative in Red Oak notified the agency early Monday morning that approximately 1,500 tons of liquid nitrogen fertilizer was discharged into a drainage ditch and it later reached the East Nishnabotna River.
The DNR says the release occurred due to a valve left open on an aboveground storage tank in the overnight hours.
