The primary objective of this survey was to provide water quality and flow data during a mid-ebb tide in each major bay system feeding Mississippi Sound for estimating both conventional and toxic pollutant loadings entering the Sound at the time of the study. In concert with this effort, water quality sampling, in-situ monitoring, and sediment sampling was conducted at selected stations within each bay or riverine system to provide an estimate of pollutant concentrations at the time of the study.