Clinton is the home of the former Clinton Corn Products plant, now owned (and much improved) by ADM. Clinton Corn smelled really bad and the stuff they dumped in the river killed fish for a mile downstream by pulling the O2 out of the water. They were fined over and over until the family that owned the place sold out.
It was like a large Hubinger Grain (of Keokuk) now corporately owned but still fouling the air and water.