The Monitoring and Rapid Response Workgroup conducted an independent environmental DNA, or "eDNA", sampling event at the end of October 2011, called the "eDNA snapshot", to obtain a comprehensive system-wide view of Asian carp DNA distribution in the Chicago Area Waterway System. This event also served to investigate whether the positive eDNA results detected during the course of rotational weekly sampling were the result of a few fish or sources causing positive eDNA results that were reported during the 2011 monitoring season. During the eDNA snapshot the monitoring agencies including Illinois Department of Natural Resources, U.S. Fish and Wildlife Service and U.S. Army Corps of Engineers sampled the weekly monitoring stations of North Shore Channel, Chicago Lock, Little Calumet River, Lake Calumet, as well as three additional sites at Lockport Pool above barrier, Cal-Sag Channel, and Chicago Sanitary and Ship Canal above the confluence, collecting 720 samples from 7 sites over 3 days. Due to the magnitude of this sampling event; more than 4 times the number of samples collected weekly, the processing of the samples were recently completed and reported to the workgroup.