The Sudbury Neutrino Observatory (SNO) has been collecting data since November 1999. The study of whether or not the D2O circulation affects the data is an important part of understanding how the SNO detector behaves. This report looks at several characteristics of the data to determine to what extent the D2O circulation affects the data. We found that there is no evidence for any dependence of event rates in the cleaned data sets on the state of D2O circulation
