All Transoceanic vessels that enter the Great Lakes are required to manage ballast water and ballast tank residuals with ballast water to clear out and exchange for tank flushing. Management and procedures reduce the density and richness of biota effectively in ballast waters and thus reduce the risk of transporting organisms from other parts of the world to non-native areas. Although most ships do ballast water management not all are able to clear the tanks. In an emergency, when the crew can clean out residual organisms, they use sodium chloride (salt) brine to treat the ballast tanks. Vessels arriving in the Great Lakes, and North Sea ports, were exposed to high concentrations of sodium chloride until the mortality rate of 100% is reached. Results show that an exposure of 115% of brine is extremely effective treatment resulting in a 99.9 mortality rate of living organisms in ballast tanks regardless of the type of organism. There was a median of 0%. About 0.00–5.33 of organisms are expect to survive treatment of the sodium chloride.