Rule Reminder: Reporting manure and chemical releases 9/3/2019 2:33:00 PM View Count 1498 State laws require producers and manure applicators to report spills to the Iowa DNR. Not only is reporting required, but the sooner you report, the more likely DNR technical staff can help. DNR staff have experience with many spills. They may be able to offer ideas that you don’t think of—preventing a worse situation or a fish kill. Play it safe and call it in.