Coca-Cola confirms that reverse osmosis is a vital step in purifying DASANI water. However, this advanced membrane technology is part of a larger multi-stage system designed to ensure the water's consistent taste. The process typically starts with municipal water, followed by several treatments.
The Complete DASANI Purification System
DASANI's production involves a multi-barrier system to purify the water and then reintroduce minerals for taste. Details on the specific steps, including granular activated carbon filtration, reverse osmosis, ultraviolet (UV) light disinfection, remineralization, and ozonation, are available from {Link: Coca-Cola https://www.coca-cola.com/us/en/media-center/DASANI-water-quality-report}. Reverse osmosis specifically uses high pressure to force water through a semi-permeable membrane, removing dissolved solids and other impurities, with the fine pores allowing only water molecules to pass. Remineralization involves adding a blend including magnesium sulfate, potassium chloride, and a small amount of salt back after RO.
Comparing DASANI's Process to Other Waters
DASANI's purification and remineralization differ from other water types. See the table below for a comparison:
| Feature | DASANI (Purified Water) | Natural Spring Water | Filtered Tap Water (Home RO System) |
|---|---|---|---|
| Source | Municipal water supplies | Protected underground springs | Public municipal water |
| Purification Method | Multi-barrier system, including RO, UV, and ozonation | Often minimal filtration (e.g., carbon filtration) | Point-of-use RO system with pre- and post-filters |
| Mineral Content | Added proprietary blend for consistent taste | Naturally occurring minerals, varies by source | Stripped of most minerals by RO; remineralization can be added |
| Taste Consistency | Very consistent, engineered for uniformity | Varies based on the specific spring's mineral profile | Generally consistent, depending on source water quality |
| Taste Profile | Crisp and clean, with a distinct mineral finish | Can be very smooth or have a complex taste depending on origin | Often described as very clean, but can be 'flat' without remineralization |
The Role of Reverse Osmosis in Creating a Consistent Product
Reverse osmosis is key to DASANI's consistency. By removing contaminants and minerals, it creates a base of purified water. Coca-Cola then adds a precise mineral blend, ensuring a uniform taste regardless of the bottling location or original water source.
Conclusion
Yes, DASANI is purified by reverse osmosis, but it's part of a broader multi-stage process. This system includes carbon filtration, UV disinfection, and ozonation, as outlined on the {Link: Coca-Cola website https://www.coca-cola.com/us/en/media-center/DASANI-water-quality-report}. The final step of adding a specific mineral blend is crucial for achieving DASANI's consistent, crisp taste, setting it apart from other water types.
