Types of water
Water is vital, just like air and food. Water is one of the important factors responsible for life on Earth. The water is chemically formed by combination of Hydrogen (H) and Oxygen (O) forming H2O. It's is also important to note that a human being can go on for weeks without food, but not without water for even few hours. And as we are describing the importance of water on our Mother Earth, it is interesting to know that 70% of earth Surface area is covered with water. To know about it in detail we can divide the water on entire globe into two main categories: Fresh water and salt water.
It is 2.5 percent of total water. But this is the only water we use for our daily needs. The fresh water consists of water from:
- Surface water ( lakes, rivers etc.)
- Ground water ( wells, spring water etc.)
- Snow cover and Glaciers
Fresh water is what we humans mainly use. It is used for drinking, after purifying it. It is also used for farming and other important daily activities/ needs. There is further broad classification of fresh water into
- Hard water
- Soft water
Note: please read our article on hard water vs soft water for more details on them.
About 97.5% of the total water available on earth is salt water. It is in form of the sea water ecosystems on our globe. And inspire of this huge quantity of water at our disposal we can hardly make any use of it because it extreme amounts of salts in it. If it was for human consumption it will need desalination and purification both to make it consumable. The sea water is hardly used for any activities, like extraction of salt, salt water fishing etc. If consumed by humans without salivation it can cause dehydration, it is not even fit for regular farming.
There are various adjectives for water used regularly and some of the famous ones are:
- Tap water
- Spring water
- Filtered water
- Boiled water
- RO (reverse osmosis) water
- Distilled water
And many more such famous terms are routinely used and let's give you a sneak peak into some of them:
It is fresh water reaching to our homes mostly through the local municipal bodies and it needs to be purified before consuming it. There are only few countries in the world where we can directly consume tap water assuming it to be pure eg. Germany, Scotland.
This is nothing but the ground water which emerges back from the cracks and fissures on the rock surface. The water has high mineral content and it is fit for consumption but ideally after purification.
It's a very popular term, and it simply means water has undergone some kind of filtration or purification process. It is not a specific term, it's very general term for purified water.
As the name suggests it is water which is boiled before use. It is one of the most popular methods of purifying waters in various parts of the world but it is not the surest way to purification. It will only kill the organisms but hardly remove any dissolved chemical impurities.
Reverse osmosis(RO) is one of the good technologies to purify water and people address this water as RO water. It's has various advantages over the traditional methods of purifying water like boiling and filtering. It not only removes the dangerous organisms but also removes the dissolved chemical impurities. This is one of the most, if not the single most popular water purification methods available today. It is now popularly combined with various other methods.
Distillation is a process in which most of the impurities and minerals are removed from the water. It is nearest to its pure chemical form. But this kind of water is not recommended for drinking. It's lack of minerals and unpalatable taste are the two reasons. But it is very useful commercially and healthcare industry. It is mostly used to reconstitute injections, in biological laboratories, also very good option in industry boilers.
This article gives you a peak into the various types of water. There is no standard classification for water but this is to classify it for better understanding.