Many people use the word salt when they are actually referring to sodium. Every water supply contains some sodium and chloride.
Salt readily dissolves in water.
This is typically caused by the relative atomic weights of each, and the tendency of the soil to retard or chemically combine more with sodium than with chloride. Any judgment relative to a water's salt concentration should be made only after reviewing the results of a few samples that have been taken at different times of the year. Safe driving conditions on our highways are important to residents and visitors alike. The application of deicing salts is a very important component of maintaining road safety. MCLs are health-based standards that must be met by public water systems.