r the purity that is produced from it) grew. Icebergs are formed by glaciers so there is more to the process than just picking a random iceberg and bottling the goodness from it. Those who are experienced in this industry say that you should never pick from an iceberg that came from the side or bottom of the glacier as this would be where the most sediment would be. These same experts have the ability to tell whether or not snow that fell in many years earlier had fell trapped underneath additional snowfall. Why does this matter? Because those particular icebergs contain that fallen, trapped snow deep inside where it has been protected from the mass majority of toxins and bacteria in the seawater and air. This type of water without exposure to pollutants and such, can easily create some of the best and purest water known to man. You would think that more people would flock to this industry and make great money but the problem is that it is very dangerous. Harvesting icebergs can only produce a limited amount of water at a time due to logistical difficulties for example, the weight/height of an iceberg can sink a ship. This includes the ships that are designed to take the contents back to shore for rinsing, melting and bottling.
Spring water may be the most controversial on the list due to the fact that not all spring water is pure and actually a high percentage of it is not pure at all. A vast majority of bottled spring water is 100% from the source, not 100% free of impurities. People automatically assume that "100% Pure" means just what it says but unfortunately, that is the game that big corporations play when it's time to put a label on what you are buying. If the water collected is brought to the surface by the use of its own pressure from the spring, the presence of bad bacteria is almost non-existent but not truly. By definition, spring water is water that flows through the surface of the earth with no help from man-made machines. However, if there is a need for a drill in the vicinity, there is still a big chance of contamination. To really know what you are drinking, you have to take into consideration the TDS level of the water and this can be determined by the geology of the local area where the water comes from. TDS is a measure of the combined content of all inorganic substances contained in a liquid (in micro-granular suspended form).
Harvesting and collecting rainwater, especially in remote areas of the world like Tasmania is a very good way of producing pure water. In these remote locations of the world, air pollution is almost non-existent so that means that the water that comes down during a rainstorm is some of the purest. Even still, the collection and harvesting process must be done properly in order for the water to be drinkable. For the most part, rainwater has extremely low mineral content and a lot of times is nitrate free.
To understand why distilled water may not be the best choice, you have to understand how the filtration process works in this instance. Contaminated water is boiled to remove harsh toxins, micro-organisms and bacteria. This process is supposed to create pure water steam and that steam is captured and cooled leaving the bacteria behind. Unfortunately, organic compounds and some metals that is found in the pre-boiled regular water have a very high boiling point. This very high boiling point exceeds the boiling point for water so technically, distilled water is not 100% pure either.
A tapped artesian aquifer, which is usually made from sandstone, will force the water up to the top of the well without the use of a man-made machine. The pressure built up in an aquifer will bring the water to the surface with force and can even sometimes create a permanent fountain. Artesian water matches spring water’s range of characteristics as you can tell, but the possibility of contamination is low due to no toxins from a man-made machine.