The title "4 healthiest types of water" may seem like yet another marketing gimmick to promote specific bottled water manufacturers. However, in reality, water does come in a variety of kinds. This classification is done on the basis of the source from which the water was taken, the processing method used for purification, and its nutritional value. Based on various permutations and combinations, these factors determine how healthy a particular kind of water can be. Tap water As most urban residences across the country pay a certain fee to their local municipal water supply systems, the water that comes through their taps is super-refined and ready to consume. This water goes through multiple levels of purification, such as coagulation, flocculation, sedimentation, disinfection, and filtration. This makes them one of the healthiest types of water. This kind of water is also sourced from pristine places like rivers, lakes, underground aquifers, and even oceans. This is why most people prefer to consume water directly from their taps over bottled water, which might contain undesirable additives and preservatives. Glacier water Water normally originates from glaciers and hot springs. Manufacturers then collect this water, which is already extremely pure and full of electrolytes and nutrients, in bottles, before mildly decontaminating it to make it even more refined and consumable. This mild processing is also useful to eliminate whatever traces of contaminants, such as metals, nitrates, and chlorine, there might be in the collected water. The natural, organic nature of glacial water makes it incredibly healthy to consume on a frequent basis. Normally, it is advisable for children, elderly people, and people with weak immunities to drink this water. Spring or glacier water contains all the minerals and vitamins one can imagine. The best part about this water is its natural and incredibly refreshing taste. Mineral water Mineral water is also extracted from underground mineral water springs. This kind of water contains more minerals compared to any other kind of water. As per the US Food And Drug Administration (FDA), this kind of water contains about 250 parts per million of mineral solvents or more. Some of the ultra-nutritive minerals found in this water are magnesium, bicarbonates, calcium, and sulfates, in addition to the necessary electrolytes that provide refreshment and hydration to the body. These aspects contribute to making mineral water highly sought after in the market. Alkaline water As the name implies, alkaline water has a pH of about 8 or 9, a number that is slightly higher than the normal acid or basic levels of most kinds of water one can buy online or in physical stores. Alkaline water is known to prevent inflammation in the body and simplify oxygen distribution as well.