- Associated Press - Tuesday, October 4, 2016

RICEVILLE, Iowa (AP) - Officials with the Iowa Department of Natural Resources say a fish kill in northeast Iowa’s Howard County can be traced to runoff of liquid fertilizer applied to a nearby farm field.

The department says the fish kill was reported Sept. 28 on the Wapsipinicon River south of Riceville. On Monday, department staff traced high ammonia levels to the field where waste from Big Ox Energy was applied. Big Ox processes industrial food and agricultural wastes into methane. Liquid fertilizer is a byproduct of the process.

The department says it is waiting on laboratory reports from water samples, but will continue the investigation.

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