In the most recent study (2002), PCB concentrations in sunfish and channel catfish near the Kansas City Plant (KCP) were low, with many samples having PCB concentrations at or near detection limits. Higher PCB concentrations were found in fish downstream of KCP discharges, but PCBs were also detected in fish collected upstream of the plant. The highest PCB concentrations in sunfish were found in fish from Boone Creek, while the highest PCB concentrations in catfish were found in fish from the Blue River (BLK 27.0). Lower chlorinated PCB mixtures (Aroclor 1242) were found in both species only at sites downstream of the KCP outfalls. In contrast, the more highly chlorinated mixtures (Aroclor 1254 and Aroclor 1260) were found in fish and clams both upstream and downstream of KCP discharges. The following Aroclors were not detected in any KCP sample: Aroclor 1016, 1221, 1232, and 1248.

Low alpha and gamma chlordane concentrations were found in catfish from all sites, both upstream and downstream of KCP discharges.

Fish results from 1991-2002 are presented in the following graphs. Tabulated results and other information obtained during the most recent study is found in Peterson et al. 2003.