If your well has high amounts ...

If your well has high amounts of sodium and chloride, there are a few methodologies that can possibly be applied--reverse osmosis that can be applied at the point- of-use, distillation systems, and deionization. All these methodologies can be expensive, especially if the well is used by 50 people and the water is distributed to various points-of-use. It would be of interest to determine why the well water has become salty. Are you near the coast or, possibly, the well was drilled too deep near naturally-occurring saltwater sources.