Two fish kills in Iowa has prompted the Iowa Department of Natural Resources to launch investigations in northwest Iowa. According to the reports, Investigators were unable to find the cause of an 8-mile-long fish kill on the West Branch of the Floyd River north of Maurice in Sioux County. The fish had been dead for several days when DNR reached the site Sunday.
Field tests on Monday showed ammonia levels within normal ranges and adequate dissolved oxygen in the river, indicating the pollutant had likely already washed downstream. Early estimates indicate nearly 38,000 fish died worth approximately $10,000. Minnows, shiners, dace, chubs and suckers were most affected, and an estimated 1,273 catfish also died. A second fish kill on the Rock River in north Sioux County was located in a pool off 10th Street on the west side of Rock Valley. CONTINUE