KELLOGG - The Iowa Department of Natural Resources is investigating a fish kill at Rock Creek Lake in Jasper County.
On July 28, the DNR Field Office in Des Moines was notified of a fish kill at the lake. DNR field staff responded to the incident, and upon arrival observed dead fish sporadically throughout the lake and several miles upstream in the Rock Creek watershed.
Water samples were collected from several locations within the Rock Creek watershed, including the lake. DNR staff tested the water for dissolved oxygen, ammonia nitrogen, and pH, with all parameters falling within acceptable ranges for fish survival. There is no longer an active fish kill in the lake. The investigation is ongoing.
Out of an abundance of caution, a swimming advisory has been posted at the lake through Wednesday, July 30. Swimming is not advised until the advisory is lifted on Thursday.
To report a release after hours, please call the DNR’s emergency spill line at (515) 725-8694. Quick reporting can help DNR staff identify the cause of an incident. The DNR website has more information about spill reporting requirements.