As Iowa continues its spring thaw, the Department of Natural Resources has received many reports of dead fish in lakes and ponds across the state. Though some past fish kills in Iowa have been linked to polluted waters, these ones occur naturally, according to the DNR, as the ice and snow of winter blocks sunlight from…
A DNR investigation in early December found that runoff from a dairy west of Bernard in Dubuque County killed over 2,000 fish in an unnamed stream in late November, the Dubuque Telegraph-Herald reports.