Toxic Indiana

High levels of toxic polychlorinated biphenyls (PCBs) have been identified in the deep sediments lining the Indiana Harbor and Ship Canal (IHSC) in East Chicago, according to University of Iowa researchers. The findings, published online in the journal Chemosphere this month, build upon previous UI work that showed how PCBs can be released from the sediment floor to the water above and thence to the atmosphere. "We found that the deeper you go, the more toxic it is," warns team member Andres Martinez, "Dredging the IHSC has the potential to expose these more toxic sediments."