Pure or purified water comes from a source that has removed all impurities. Distilled water is the most common or known form of pure water. Pure water can be purified through various processes such as carbon filtration, micro porous filtration, and ultra violet oxidation. Sometimes various processes are done simultaneously too. It is used for various purposes that include cooking, drinking, scientific studies, and Laborites.
Water purified systems remove various impurities from water including inorganic ions, organic compounds, bacteria, endotoxins and nucleases, particulates and gases.

Distilled

It is bottled pure water produced by distillation. The water is first boiled after which the steam is condensed into a container where the contaminants are left behind. This process guarantees bacteria-free water if the reservoir is well sterilized.

Deionized

It is a cheaper imitation of distilled water that is stripped of all essential mineral ions such as calcium, copper, and iron. The deionization process is nothing but a physical process that uses ion exchange resins which remove mineral salts from the water. The entire process is an inexpensive way to achieve pure water.

Ultra Filtration

In water purification, ultra filtration water purifier system is used to remove various bacterial endotoxins. They are used at the end of water purified systems to ensure near total removal of impurities like pyrogens, and nucleases. However, it is unlikely to remove dissolved in organics, gases, and organics.

REVERSE OSMOSIS

It is the most economical method of removing nearly 99% of water's contaminants and is therefore considered one of the best filters for water. It makes use of percent rejection technology. The level of the purity depends on the purity of feed water. Water obtained from this method is typically 95-99% higher in purity. It can therefore safely be concluded that reverse osmosis gives the best water purification system.

Uses

It is used in everyday life both by humans and animals. It is also useful for fish aquariums since it does not contain harsh impurities like chlorine and copper, which can even kill the fish. Car washes sometimes also use it because it does not leave spots. Moreover, it is preferred over tap water because it does not contain chemicals that can harm internal engine components.

Disadvantages

Consuming pure water has both advantages and disadvantages. One major disadvantage being that it does not contain useful minerals such as calcium and iron which are present in basic drinking water. It also does not contain fluoride which is essential for maintaining healthy teeth. However, if you are getting sufficient mineral and nutrients from the food, you are eating, drinking pure water can be considered a reasonable option.

Advantages

Tap water is thought to be linked to many poor cardiovascular problems. Pure water, on the other hand, does not contain many chemical compounds that are not required by our body and is thus less likely to cause any harmful effects.

Today, more than 780 million people across the world do not have access to clean drinking water. According to the centers for disease control and Prevention, an increasing number of people are dying because of diarrhea, and the number is thought to increase day by day. The need for pure water is therefore urgent, and while it is the duty of the government to provide its citizens with pure water, individuals themselves also need to become aware. When buying bottled or any water, they should make sure it has gone through various processes of purification just as distillation.