Technical note: Chlorination effectiveness for zebra and quagga mussels: This research demonstrated that the quagga mussel is more susceptible to chlorination than the zebra mussel

A comparison of zebra mussel (Dreissena polymorpha) and quagga mussel (Dreissena bugensis) mortality from chlorine exposure is presented. The quagga mussel is a newly identified mollusk within the Great Lakes that is similar in appearance to the zebra mussel. During a full-scale chlorination treatment, tests conducted in sidestream monitors showed significantly higher mortality for the quagga mussel. Times to 100 percent mortality for quagga and zebra mussels were 23 days and 37 days, respectively. The data suggest that chlorination programs designed to control zebra mussels should also be effective for controlling populations of quagga mussels.