Clearly Filtered: Purified water is water free from bacteria and viruses. Distilled water is water that goes through the distillation process (which removes the majority of viruses and bacteria). And filtered water is water that is filtered by a physical filter to reduce a range of contaminants based on the quality of the filter.   What are the Drawbacks Of Distilled Water?   It lacks beneficial minerals (like magnesium, calcium, and other electrolytes)! That's why the vast majority of health experts say you should NOT use distilled water as everyday drinking water (or home water).