ORONOCO, Minn. — What appears to be a minor fishkill was reported on Lake Zumbro downstream from Rochester. State pollution control agents have taken water samples to identify whether agricultural, industrial or municipal spills are responsible. Dead catfish, crappies and sunfish have been found floating belly-up in shallow waters. The lake is on the 64-mile Zumbro River that flows through Rochester to the Mississippi River at Kellogg. The watershed is 1,400 square miles.
