Water Purifier Buying Guide – Buy the Right Water Purifier

This is the ultimate water purifier buying guide which will help you to buy the right water purifier. So, are you thinking about buying one? Maybe you have already made the decision, but wait a minute. Did you do all that is required before buying? If yes, then go ahead and buy. If no, you need to spend some time reading below as this could help you in choosing the right water purifier to buy.

You may still be having some questions in your mind seeking clarification which you will find answers here in this Guide. Read it thoroughly and make your choice which I believe will the right choice. So, let’s begin.

Things to Consider Before Buying a Water Purifier

1.  Testing of Water

Test the water supply in your house. Now, you make ask how to test the water. You can do it in two ways, one by trusting your instincts and other with the help of a TDS meter or a water test kit.  A simple way to analyze the quality of water is by smelling and tasting it. If you feel the water has a bad odor or it tastes bad, then this is enough to judge if the water is fit for drinking.

What if the water smells and tastes good? Is it good for drinking? The answer is NO. Look for color, sediments or particles in the water.  You will also have to check the pipes for corrosion or mineral buildup. If you find any of these, then the water you drink could very well have minute particles which may affect the quality of water.

All the above-listed methods to analyze water can be implemented by you, but for a detailed analysis it is important that you test the water through a validated testing center as the water that you drink may have contaminants like lead and arsenic which could only be found by extensive analysis of the water.

Where to Test Water?

Ministry of Drinking Water and Sanitation (Rural Drinking Water Program) – Contains a list of water quality testing labs all over India, mostly rural India.

PurityPortal is an online purity testing lab where you can book online for water testing. They would come to your doorstep to collect sample. After testing, the results will be e-mailed to you.  

 2.  Examine the Results

I am hoping that you have tested the water. Depending on the results, you have to take your next decision. If the result states water is fit for drinking, then good news for you. You don’t have to spend money to buy any water purifier. If at all the results are disappointing and the water is not fit for drinking, you can consider using water purifier. High TDS level is the primary reason for abnormal water test results. You should not ignore this as prolonged drinking of high TDS water could affect your health. To know more on TDS, read it here – TDS in water.

You can use this water interpreter tool to know more on the results (this is not a water test interpretation tool for Indian consumers, use it just to know more about the quality of water).

3.  Inquire on Available Water Purification Technologies

Assuming the results returned abnormal, i.e., water is not fit for drinking, the next approach that you should adopt is to look for the latest technologies that are available in the purification process. Gone are the days where you just use a filter which used traditional ways of purifying water.  In modern times, we have the latest innovative technologies which will help you drink safe, healthy water. The new generation water purifiers uses RO, UV, UF, TDS based purification technology. You should be able to know which water purifier could serve you the best based on the test results.

4.  Choose the Right Water Purifier

There are many water purifiers in the market which uses UV, UF, RO technology. With so many water purifiers, it could be a difficult task to buy the best one which suits you. Basically, all popular brands use the same technology with slight varying features and design. You have to decide on the type of water purifier that you need. Some of the most common ones are UV, UF, RO water purifiers. Selection of appropriate water purifier does not end with testing of water.  You have to consider many other factors before buying one. 

To put it briefly, you have to take into consideration whether the water purifier will meet your requirements such as the purified water storage capacity, maintenance cost, after-sales service, budget, etc. For more detailed information, read this article – how to choose a water purifier.

UV, UF, and RO Water Purifiers – Which One Should You Use?

The most popular water purifiers are the Ultraviolet (UV), Ultrafiltration (UF), and the Reverse Osmosis (RO) systems. Every water purifier in the market uses these systems either in isolation or in combination. Let us look at who can use these water purifiers.

Rural Folks – People Relying on Natural Sources of Water

A sizeable chunk of the Indian population lives in villages. The people living in these villages have to depend on natural sources of water for their daily requirements. Normally, you find water sources like rivers, lakes, and ponds near these villages. You also have wells as a source of water for these villagers.

These water sources cater to all the water needs of these villagers. Therefore, you see them using this water for drinking, bathing, cooking, washing clothes, and agriculture. You have village animals depending on these sources of water.

In addition, you have industries in the vicinity that dump effluents into these rivers. This results in contamination of water. Therefore, the people from these villages have to contend with water contaminated with human, animal, and industrial waste. Naturally, this water will not be safe for direct human consumption without subjecting it to purification. This is where these UV, UF, and RO water purifiers are useful.

1.  UV Water Purifiers – The principal objective of UV water purifiers is to eliminate bacteria, viruses, and other microorganisms from water. The water from rivers, lakes, and ponds do have these microorganisms in plenty because of contamination from human and animal waste. Subjecting this water to UV treatment can result in elimination of microorganisms thereby making this water fit for human consumption.

2.  UF Water Purifying Systems – We have seen that there are wells in practically every house in the village. There are fewer chances of human and animal waste contaminating well water. On the other hand, you can have visible sediments like leaves, twigs, mud, and other water animals like fishes and frogs in well water. The UF water purification systems are perfectly suited for filtering the visible sediments.

You do not require electricity to operate these UF systems. Hence, you find villagers using UF water purifying systems to purify the well water and making it fit for drinking.

3.  RO Water Purifiers – There are many industries that dump effluents like arsenic, lead, and other impurities in river water. This is one of the worst forms of water pollution. Consuming water contaminated with these heavy metals can result in people contacting dangerous diseases. There is a need for immediate purification of such water before rendering it fit for human consumption.

Reverse Osmosis is the best process to get rid of these heavy metal impurities. In addition, RO systems are also able to eliminate the TDS from water sources like borewells. Hence, RO water purifying systems have a lot of importance in such places.

Which of these systems is the best suited for the rural folks?

All these three systems have their individual importance. We can sum up their utilities as follows.

UV Systems – To remove bacteria, viruses, and other microorganisms responsible for causing waterborne diseases.

UF Systems – To remove visible sediments from well water and other water sources.

RO Systems – To remove heavy metal impurities and TDS from water.

A combination of all these three systems is perfect to cater to all types of water sources.

Urban Folks – Having Access to Municipal Water

People living in towns and cities have an inherent advantage over the people living in villages. They might not have access to water directly from rivers, lakes and ponds, but they have municipalities in towns that undertake the supply of water to its residents. These municipalities have water treatment facilities whereby they purify water before distributing it to the residents.

Normally, you find municipalities using chlorine and other similar chemicals to purify water. Some municipalities have RO water purification systems as well. They supply this water through metal pipes to the individual houses. These houses have tanks for storing this water. Therefore, there are chances of re-contamination of water at various stages during its transport and storage. This necessitates the use of water purifiers.

1.  UV Systems – Water stored in tanks can attract microorganisms, bacteria, and viruses. Hence, you need UV systems to purify this stored water. The UV systems can eliminate these disease-causing microorganisms and make the water fit for human consumption.

2.  UF Systems – You need pipes to transport water. The metal pipes used in the process can rust and hence contaminate the water. There can be leaks in the pipes whereby other contaminants can enter the pipeline. You need UF systems to remove these sediments from the water before consuming it either for drinking or cooking.

3.  RO Systems – Municipal water contains chlorine and other salts. The water can attract other contaminants on its way towards the individual houses. An RO system is the best one to take care of such impurities.

People Living in Coastal Areas – Saltwater through Borewells

Many people living in coastal areas, either in villages or cities depend on borewells or groundwater for their water consumption needs. The water you find here has a large proportion of TDS. It is impossible to drink this water directly without purifying the same. Majority of the people will need to use RO water purifying systems in their homes to cater to TDS, heavy metal impurities, and other sediments.

RO systems do not eliminate certain microorganisms and bacteria. Hence, you will need to have a UV system in combination with the RO system. The RO system depends on use of semipermeable membranes and is relatively expensive to other types of water purifiers.

RO water purifiers eliminate TDS up to 95%. In the process, they remove essential salts and minerals from the water. Therefore, it is better to have a TDS controller and Mineralizer working in combination with these RO systems.

The best RO systems applicable to the people living in coastal areas should have the following technologies.

  • Sediment filter to remove visible impurities.
  • Pre-activated carbon filters to remove unpleasant taste of input water.
  • UF systems to take care of ultrafine impurities.
  • RO semipermeable membranes.
  • UV systems to remove microorganisms.
  • Post activated carbon filters to improve the taste of RO filtered water.
  • TDS controllers to balance the pH levels of water.
  • Mineralizer to supplement the mineral content lost during the RO purification process.


We have seen the individual uses of the various kinds of water purification systems. These systems can work in isolation as well as in combination. Your selection of water purifier should depend primarily on the quality of water. I hope this water purifier buying guide will help you in buying the appropriate water purifier for your home use.