Purified water represents the fastest growing segment of the bottled water industry. Why? Because it’s purer than other types of waters. When it comes right down to it, why does anyone “buy” their water. Some buy out of convenience, but most buy because they want something that’s of a higher quality and purity than other options like tap water. Like other types of water, there are popular misconceptions about purified water as well. To meet the legal definition of “purified water”, water impurities must be removed or reduced to extremely low levels. Water which meets this definition is of higher purity than spring water, tap water or filtered water.
Purified water is often confused with filtered water. Many people believe the two terms to be synonymous, but this is not the case. While both types of water are subject to some sort of filtration (as is almost every spring water), purified water is cleansed and purified through additional purification processes, typically reverse osmosis, distillation or deionization. The resultant product, “purified” water, is of significantly higher purity than either spring water, tap water or filtered water.
Another form of purified water is deionized water. The process to deionize water is less expensive than distillation. Special chemicals are added to the water, which bond to the dissolved salts in water. These remove the chemicals, leaving behind water that is very pure, even free of most bacteria. Deionizing water takes less time, and requires less work, but for human consumption, you’re more likely to see distilled water in stores than deionized water.