The Iowa Department of National Resources spokesperson Ken Hessenius said a tanker carrying liquid fertilizer tipped over in Odebolt Friday morning.
Hessenius said a Northland Transportation Inc. tanker was carrying 4,340 gallons of ammonium thiosulfate.
"It’s unknown how much of the product leaked from the top fill port before the leak was stopped and contained," Hessenius said. "Some of the fertilizer ran into a small tributary, through a culvert and flowed through town to Odebolt Creek."
DNR staff tested water quality at several places in the tributary and found elevated levels of ammonia, but did not detect ammonia downstream in the creek. There were no fish in the tributary and no dead fish have been found.
The company will pump up spilled fertilizer and water trapped behind a culvert.