From the Lawrence Daily Journal-World for June 30, 1986:

The Kansas Department of Health and Environment and the Kansas Fish and Game Commission issued a health advisory about carp caught in the Kansas River between Lawrence and Eudora. Consumption of carp should be limited, officials said, because of high levels of chlordane, a cancer-causing insecticide, found in edible portions of the fish during testing the previous fall. The findings applied only to carp, but officials were warning fishermen that other bottom-feeding fish, such as catfish, might be likewise affected. Residents whose drinking water came from the Kaw were not in any danger, as tests showed that the chlordane was not appearing in Lawrence’s treated water.