Drinking purified water is one of the most essential things that keep us healthy. In this post, I am going to provide the list of Best Water Purifiers.

Everything from food to Air and Water is affected by pollution. Say thanks to Water Purifiers. Now we can Drink safe water by installing a water purifier at our Home.

Before selecting the best water purifier, Check out the difference between RO, UV and UF water purification technologies.

RO Water PurifierUV Water PurifierUF Water Purifier
Requires Electricity to operateRequires Electricity to operateNo Electricity required
Kills and Removes all the Bacteria and Viruses from the Water.Kills all Bacteria and Viruses but their Dead Bodies remain in the Water.Kills and Removes all the Bacteria and Viruses from the Water.
Requires Electricity to Boost the Tap Water PressureUV Water Purifiers can work with Normal Tap Water Pressure.UF Water Purifiers can work with Normal Tap Water Pressure.
Removes the Dissolved SaltsCannot remove Dissolved SaltsCannot remove Dissolved Salts
RO Purifiers has Prefiltration system to work with the Dirty Water.Water should be clear for UV to work.Works with Dirty Turbid Water.

We have also listed the Buying Guide and FAQ about the water purifiers below. If you have any queries regarding water purifier selection, post them in the comments section, and I’ll answer ASAP.

Best Water Purifier in India (2019)

1. Kent Grand 8-Litre Mineral RO and UV/UF Water Purifier

Talk of water purifiers and the first name that comes to mind is Kent. Kent water purifiers have made a name for themselves in the Indian market with their excellent products.

  • 8-liter capacity
  • Futuristic Double Purification
  • Patented RO TM technology
  • Ideal for Indian homes

Kent Grand comes with a patented RO TM technology along with TDS controllers to ensure the purest drinking water for the family. Kent water purifier products are ideal for Indian conditions as they can handle the municipal water supply and natural groundwater with equal ease.

This water purifier is different from its peers as it comes equipped with a futuristic double purification system comprising of RO and UV/UF. This technology eliminates all impurities including bacteria, viruses, and dissolved salts to ensure the purest form of drinking water.

The loss of minerals during the RO purification process is natural. Kent’s patented RO technology comes with TDS controllers that replenish the minerals lost during the RO purification process to give you safe and tasty drinking water.

Other notable features of Kent Grand are computer controlled operations, ABS Food Grade Plastic construction, and high storage capacity.

  • Best water purifier for Indian conditions
  • Double purification including RO and UV/UF
  • Purify water from all inlet sources
  • 8 Litre Storage
  • RO water purifiers waste lot of water
What is the frequency of changing RO filters?
It depends on the quality of the inlet water. If the TDS levels are high, an annual change is a right frequency. Otherwise, RO filters can work for two to three years.
How do you know when to change the filter?
You will see a variation in the taste of the water you drink. That should prompt you for a filter change. The modern-day purifiers come with filter change alarms.
What is the role of TDS controller?
The TDS controller replenishes the essential minerals lost during the RO purification process.
Can we connect the Kent Grand to your refrigerator?
No, this water purifier is a standalone water purifier.

2. Havells Max 8-liters RO UV Water Purifier

Havells is also a reputed brand of water purifiers in India. This appliance uses both RO and UV purification techniques to ensure the supply of 100% pure water. Havells water purifiers are renowned for their excellent physical appearances.

  • Capacity – 8 liters
  • Purification technology – RO + UV
  • Mineralizer function restores lost minerals
  • Revitalizer restructures the water molecules
  • Best budget RO water purifier

Havells Max RO + UV water purifier uses double water purification methods to purify water. The RO membrane takes care of the TDS, bacteria, viruses, and other minute impurities. The UV purification technology takes over to destroy any residual bacteria or viruses to make the output water 100% pure.

Havells water purifiers come with a mineralizer function whereby the minerals cartridge not only replenishes the RO purified water with essential minerals but also rectifies the pH value of the water. This process ensures the supply of pure and tasty water at all times.

Havells Max water purifiers come equipped with a Revitalizer feature that restructures the water molecules and biologically activates them thereby improving the hydration and mineral absorption capacity of water.

This water purifier is an intelligent appliance as the iProtect feature continually monitors the water purification process to ensure the supply of pure water.

Other exciting features include food-grade quality storage tank and an innovative design that lets you place the water purifier at the corner of your kitchen platform or even mount it on the wall corners.

  • Excellent designing
  • Double purification makes water 100% safe to drink
  • Mineralizer function to restore lost minerals
  • Requires high maintenance, especially in areas where TDS levels are high
  • Buy yearly warranty, but it is an expensive affair
Does the Havells water purifier come with TDS controller?
No, it comes with a similar mechanism known as Mineralizer to replenish essential minerals lost in the purification process.
Does the warranty cover replacement of RO filters?
No, the replacement of the filters does not come under warranty.
Does the Havells Max waste any water during the purification process?
Yes, all RO water purifiers waste a lot of water during the purification process.
Do you need a separate pre-filter for the Havells Max?
It depends on the quality of input water. If you have turbid water as the source, you need installing an additional pre-filter.
What type of design is the Havells Max?
It is both a wall mounted and tabletop design.

3. LG Puricare WW180EP RO + UV + UF + Mineral Booster Water Purifier

LG stands at the top of all consumer durable items in India. Whenever you talk of consumer appliances in India, the name LG does ring a bell. LG manufactures some excellent water purifier models as well.

  • 8-liter capacity
  • Dual Protection Steel tank
  • RO, UV, and UF Filtration
  • Mineral Booster

The highlight of this water purifier is the stainless steel tank used instead of the food-grade plastic ones you see in almost all water purifier models. The digital sterilizing technology in use is also the first in the industry.

This water purifier comes with a robust 5-stage RO filtration system comprising of an external sediment filter, internal sediment filter, pre-activated carbon filter, RO membrane layer, and the post-activated carbon filter along with the mineral booster.

The presence of a mineral filter adds the essential minerals lost during the purification process to ensure that the RO-purified water is healthy and tasty. LG refers to this technology as True Filtration.

An additional valve on the side of the appliance enables you to wash fruits and vegetables with sterilized water directly into the sink.

Ultraviolet LED rays sterilize the RO water for 75 minutes at 6-hour intervals to prevent bacteria and germs from breeding. This water purifier comes equipped with smart filter change, UV sterilizing, and water level indicators.

  • High level of sterilization
  • Excellent performance
  • Stainless steel tank to prevent the growth of algae
  • RO process wastes a lot of water
  • Cost is a factor
How much water wastage do you find in an RO water purifier?
It depends on the quality of the source of water. The average wastage is around 60%. Hence, it requires high maintenance.
Can you reuse this water?
You cannot use it for drinking, but you can wash utensils, water plants, and do other work.
Does this appliance supply both hot and cold water?
No, this water purifier is a simple water filter that provides only pure water.
How much does the maintenance cost?
On average, the annual maintenance is around Rs 4.5 K
Can you attach this water purifier to your fridge?
No, you cannot do so.

4. Eureka Forbes Aquasure Smart Plus 6-liters RO + UV + MTDS Water Purifier

Eureka Forbes is also a reputed manufacturer of water purifiers and other consumer appliances. These water purifiers also use Double Purification technology to ensure supply of 100% pure and tasty water.

  • Capacity of 6 litres
  • RO + UV purification technology
  • Energy saving mode
  • MTDS controller

The Eureka Forbes water purifier is capable of treating all kinds of source water including well water, bore well, and tankers.

This water purification system comes with a six-stage water purifying technology that includes

  • Pre-filter to remove large impurities
  • Chemi Block with a built-in particle trap filter to eliminate bad odor and dissolved organic contaminants
  • Membrane Life Enhancer prevents scaling of dissolved salts like magnesium and calcium.
  • RO Membrane to eliminate TDS, the hardness of water, and remove heavy metals like arsenic and lead
  • Taste enhancer to replenish the minerals lost during the RO filtration process
  • UV disinfection chamber to eliminate the bacteria and viruses from the RO purified water

The smart designing featuring LED indicators highlight various activities like purification process, lack of water supply, and defects in the machine. The design is such that you place it on the countertop as well as mount it on the wall. The 6-liter storage should suffice an average Indian family of three to four persons.

The RO cartridge comes with a long life of 6000 liters of purification. The presence of the TDS regulator ensures the replenishing of essential minerals that you usually lose during the RO purification process. Hence, you get 100% tasty water to drink all the time.

This appliance is a smart one in many ways. It switches off once the water tank becomes full thereby conserving energy. The Smart Plus feature takes care of the appliance during voltage fluctuations between 150 and 270V.

  • Excellent design
  • Six-stage purification process
  • MTDS to restore the taste of water
  • Wastes water like all RO purifiers
  • 6-liter capacity is a bit small for an Indian family
Do you have to buy the pre-filter separately?
No, it comes with the attachment. If water quality is good, you need not use this attachment at all.
What is water purification speed?
This system purifies around 30 liters in an hour.
Can you use it for purifying bore well water?
Yes, you can use it for all inlet sources
Is any warranty available with the appliance?
Yes, it comes with a 1-year warranty.
How does it save energy?
The appliance switches off once the water storage tank becomes full.

5. Kent Ace Mineral 7-Liter 60-Watt RO+UV+UF Water Purifier

Kent is a perennial favorite of water purifier users. Hence, you have these machines coming in various models and capacities. The basic features are the same with almost all Kent models.

  • RO + UV + UF purification technology
  • 7-liter capacity
  • High-quality plastic storage tank
  • One year warranty

The Kent Ace water purifier model, works on Mineral RO technology to deliver the best quality of pure water. It also comes with an in-built TDS controller to ensure the replacement of minerals lost during the RO purification procedure.

As this appliance can tackle all inlet sources of water such as well, bore well, municipal tap, and tanker water, it is an ideal machine for Indian homes.

This water purifier has both UV and UF purification to eliminate bacteria, viruses, and the smallest of impurities. The RO membrane ensures the elimination of heavy metals like arsenic, lead, and antimony. It also caters to the TDS present in the water and removes all dissolved salts.

Other notable features include a high-quality food-grade plastic tank for storage of water.

  • Excellent purification
  • Highly safe to use
  • Prompt after sales service
  • 3-year no charge service promise
  • RO purifiers waste a lot of water
Can you keep it on the kitchen countertop?
No, you can mount it on the wall. Alternatively, you should have a water purifier stand to hold the appliance.
What is the RO membrane pore size?
The RO membrane size is 0.0001 micron. The sediment filter is 5 to 10 microns whereas the UF membrane is 0.01 microns.
Does this appliance require an external pump?
No, it comes with an in-built pump to take care of inlet water at low pressures.
Is it suitable to treat all types of inlet sources?
Yes, it can treat all types of water including brackish water. Hence, it is ideal for Indian homes.

6. Havells Max Alkaline 7-Litre RO + UV Water Purifier

Havells is a reputed name in the water purifier market with some of its models being the favourite of homemakers all over India. This water purifier comes with excellent features.

  • 100% RO and UV purification
  • 7-stage purification process
  • Mineralz technology to correct pH value
  • Revitalizer to improve hydration
  • Adequate capacity to cater to Indian families
  • One year warranty

Reverse Osmosis and Ultraviolet purification are the best processes available today to purify water in India. This water purifier features both these systems. Hence, you get clean and purified water every time you use this appliance. This system comes with a seven stage water purification process.

The sediment filter eliminates large impurities from the input source of water

The pre-activated carbon filter removes organic impurities to reduce the load on the RO filters.

The RO filtering system is the heart of the machine. It takes care of heavy metal impurities like arsenic, lead, antimony, and other harmful contaminants.

The post-activated carbon filter removes the traces of organic impurities that remain after the RO filtering process. It also eliminates bad odour and makes the water tasty to drink.

The Ultraviolet chamber ensures to eliminate bacteria and viruses to make the water safe and hygienic to drink.

The Mineralz feature ensures to replenish the minerals lost in the RO water purification stage. Thus, it rectifies the pH value of the resultant water to make it alkaline and safe to drink.

The Revitalizer function enhances the water molecules to improve hydration and mineral absorption.

This water filter has an excellent appearance, whereby you can hang it in a prominent corner of the kitchen wall. Alternatively, you can place it on your kitchen platform as well. It comes with a one-year warranty.

It is advisable to switch over to an Annual Maintenance Contract after the expiry of the warranty period. This water filter comes in a range of combination colours to suit your kitchen.

  • 7-stage water purification including RO and UV
  • Mineralz feature to replenish lost minerals
  • Revitalizer function to improve mineral absorption
  • Excellent looks and performance
  • Provides alkaline and great tasting water
  • Wastes water like all RO water purifiers do
  • Requires changing of filters once in two years

7. Blue Star Majesto 8-Liter RO + UV Water Purifier

Blue Star Majesto is similar in many respects to the Blue Star Aristo model. However, the capacity of the storage tank in the Majesto model is eight liters as compared to the 7-litre tank capacity of the Aristo.

  • 8-liter storage tank
  • Double purification technology
  • Food-grade plastic tank
  • One year warranty

Blue Star Majesto comes with a six-stage purification process that includes the following

  • Pre-filter to trap the large impurities
  • Pre-activated carbon filter to remove volatile organic compounds
  • Sediment filter to eliminate mud and other dissolved contaminants
  • RO membrane eliminates heavy metal impurities and TDS
  • UV lamp destroys the bacteria, viruses, and other microorganisms
  • Post-activated carbon filter along with Aqua Taste Booster helps in improving the taste of RO-purified water.

This water purifier comes with advanced system alerts like full-tank indicator and purification –on process indicator. The design is an aerodynamic one whereby you can install the appliance in two ways. One is the traditional wall mount. Alternatively, you can also place it on the countertop.

The outlet tap is at the right height whereby it becomes easy to put a glass below it to collect water.

The child lock feature is another highlight of this appliance, as it enables you to save water.

  • Double filtration method
  • Deals with high levels of TDS
  • Excellent design
  • Does not work with water at low pressure
  • There will be water wastage
Can it purify hard water?
Yes, the Blue Star Majesto can handle water with TDS levels up to 2000.
What type of membrane does Blue Star use?
Blue Star water purifiers come with the DOW membrane, the best in the world.
Can you get pure water when there is no electricity?
This device comes with an 8-liter storage tank. Hence, during power cuts, you can use the water from the storage tank.
Does the machine add back the minerals it lost during the RO process?
The machine does not come with a mineralizer. It has an Aqua Taste Booster that improves the taste of water but does not add the minerals lost during the purification process.
Do you have to wall-mount it or use it as a countertop?
You can use this water purifier in two ways, wall mount, and countertop.

8. AO Smith Z8 10-Liter Green RO Series Water Purifier

AO Smith is an international brand of repute. Some of the best water purifiers in the world come from the AO Smith manufacturing units. These water purifiers are also available in India now with the Z8 model being the most popular.

  • Capacity of 10 liters
  • RO purification with mineralizer facility
  • Food-grade plastic storage tank
  • One year warranty

AO Smith water purifiers are unique in the sense that they not only purify water but also ensure to save water. The standard RO purification process is such that every RO machine wastes 50% of water. This water usually goes down the drain. There are ways to reuse the water, but not many people do so.

AO Smith water purifiers come with an innovative and patented Advanced Water Recovery Technology that saves two times the water as compared to the regular RO water purifier.

The RO + SCMT technology ensures elimination of harmful substances whereas the MINTECH feature adds the minerals lost during the purification. Hence, you get pure and healthy water to drink. Z8 also comes with a hot water dispenser where you get hot water at 45 degrees and 80 degrees Celsius at the press of a button.

This water purifier comes in different colors to suit your kitchen interiors.

  • Does not waste as much water as standard RO water purifiers
  • Provide healthy and pure water to drink
  • Facility for dispensing hot water
  • Best water purifier with Hot water dispenser option
  • Issues with after sales services
Can you use this water purifier for all types of water?
Yes, you can use it for purifying groundwater and tap water.
Does it come with UV function?
No, the AO Smith Z8 does not have UV protection facility.
What is the filter life and cost of replacement?
The RO filter can purify up to 60,000 liters. The cost of a replacement filter should be around Rs 4.5 to 5 K.
What is SCMT?
SCMT stands for Silver Charged Membrane Technology. It is an advanced water purifying technology.
Does this water purifier deliver hot and cold water?
You can get water at three different temperatures, room temperature, 45 degrees, and 80 degrees.

9. Livpure Glo 7-liter RO + UV + Mineralizer Water Purifier

Livpure is a comparatively new entrant to the field as compared to Kent and the others. However, these water purifiers are excellent as they can handle all types of water thereby making it ideal for Indian conditions.

  • Capacity of 7 liters
  • RO + UV purification
  • Mineralizer facility to restore taste of water
  • 6-stage advanced purification
  • Best budget RO water purifier for medium family

Livpure water purifiers work on an advanced water purification system that is a combination of reverse osmosis and ultraviolet radiation to ensure 100% safe drinking water.

This water purifier comes with an excellent design having features like indicators for purification processes and full tank status. The system switches off automatically on the tank becoming full. Hence, the 7-liter tank capacity enables you to get pure water even in the absence of regular current supply.

The Livpure appliance is capable of handling impure water with TDS levels up to 1500 ppm. The system can purify up to 12 liters per hour.

The six-stage advanced purification system comprises of a sediment filter, pre-activated carbon filter, RO membrane, UV disinfection chamber, silver impregnated post activated carbon filter, and mineralizer. Thus, it gets rid of sediments, TDS, microorganisms, bacteria, and bad taste from water.

The mineralizer replenishes the vital minerals lost during the RO purification process to restore the mineral content and improve the taste of water.

  • 6-stage purification process
  • 7-liter capacity is ideal for a small Indian family
  • After sales service is not that good
  • RO process wastes water
Does this appliance come with a warranty?
Yes, the Livpure water purifier comes with a 1-year warranty.
Can you use this water purifier to purify bore well and water with high TDS content?
This water purifier can handle TDS up to 1500 ppm. Hence, it is suitable for bore well water depending on your TDS levels.
Do Livpure water purifiers come without UF?
This particular model does not have UF. However, other models come with UF technology.
Can you adjust TDS in the Livpure Glo model?
No, you cannot adjust TDS levels in this model.
Is there any filter change alarm in this water purifier?
No, there is no filter change alarm in this appliance. You have to rely on the taste of water to decide about changing filters.

10. Blue Star Aristo RO + UV 7-Liter Water Purifier

Blue Star is a renowned player in the consumer durables manufacturing industry. The water purifier is a new product, but it is a trusted brand name.

  • 7-liter capacity
  • 6-stage purification process
  • System alerts like low pressure, tank full, and purification alert
  • One year warranty on the product

Blue Star Aristo water purifier comes with a 6-stage purification process that includes a pre-sediment filter, pre and post activated carbon filters, RO membrane, UV lamp, and the aqua taste booster to improve the taste of drinking water.

The Aqua Taste Booster feature maintains the optimum pH level of water and enhances the taste of RO-purified water. The double filtration method employed by RO and UV eliminates all impurities such as TDS, bacteria, viruses, heavy metals, radioactive matter, and so on.

The copper impregnated post-activated carbon filter removes organic compounds, toxic smell, and has anti-bacterial properties as well. The high-quality RO membrane ensures excellent purification capacity. This water purifier comes with a large 10-inch filter to ensure efficient purification.

The physical features of this water purifier include a 7-liter storage tank to store water for the entire family, a child lock function to prevent unnecessary wastage of water, and system alerts. These alerts include purification-on, tank full, low pressure, and UV fail signals.

  • High-quality purification
  • 7-liter capacity is ideal for Indian homes
  • System alerts
  • 6-stage purification
  • Requires maintenance
  • Does not work at low pressure
Does this filter need special inlet tap?
No, it can work with your regular taps. You need to make a few adjustments to your existing faucet.
Can it work under low pressure?
The machine does not come with a booster pump. Hence, it requires tap water at sufficient pressure to work properly.
What type of storage tank does Blue Star Aristo have?
This water purifier comes with a Food-grade plastic storage tank.
Does the warranty period include the cost of replacement of filter?
No, you have to buy filter separately. It does not come under warranty.
What type of installation does this appliance require?
You can use this appliance as a countertop or wall-mount assembly.

11. Kent Maxx 7-liters UV + UF Water Purifier

Kent Maxx is not an RO water purifier. Hence, you should not use this appliance where there are high levels of TDS in water. This device is ideal in cities where the local municipalities supply RO-treated water to its residents.

  • Capacity of 7 liters
  • UV and UF water purifier
  • Food grade plastic
  • Ideal for water with low TDS levels

Kent Maxx provides double purification with UV and UF to ensure the elimination of bacteria, viruses, and all microorganisms. As it does not have RO purification, it is ideal for places where TDS levels in water are within acceptable limits.

This water purifier comes with a 7-liter detachable storage tank that enables you to take your pure water with you wherever you go. The food-grade plastic material makes it a durable appliance.

This device comes with an 11-Watt UV lamp to deactivate all microorganisms from water. Other notable features include the filter change alarm and UV fail alarm to alert users.

The in-built SMPS feature ensures to protect the machine from high voltage fluctuations. As this water purifier works on a fully automated process, there is no need for any manual intervention. The push-fit components in the Kent Maxx ensure there are no leakages thereby preventing wastage of water.

  • UV protection ensures elimination of disease-causing germs
  • Best water purifier for places with low TDS in water
  • Food grade plastic
  • Low maintenance
  • Not suitable for purifying groundwater
  • Does not work where water pressure is low
How does the Kent Maxx purify water without RO mechanism?
You do not need RO technology to purify water with low levels of TDS. The UV and UF mechanism is enough to purify water.
Does it work when water pressure is low?
No, it does not. However, if you install a separate pump, it will.
Is it easy to clean the UF filters?
Yes, it is easy. You should note how the technician does it the first time. Subsequently, you can do on your own.
What is the maintenance cost of this water purifier?
This water purifier is not an RO appliance. Hence, the maintenance cost is low. It is around Rs 1,500 per annum.
Can you stop the filter alarm?
The only way to stop the filter alarm is to change the filter.

Best Water Purifier – Buying Guide

What is the indicator of life on any planet?

When we say, we are exploring possibilities of life on Mars, what is it that astronomers and scientists are searching for? The answer to both the questions is ‘Water’.

Yes, water is as essential to life as air. One cannot imagine any life form without water. Fortunately, our Earth is blessed with sufficient water to take care of life in the present as well as the future generations.

Having said that, are we ensuring that the future generation has access to clean and pure water to drink?

The answer to this question is a NO as well as a YES. NO, because the release of human and industrial waste is the primary cause of water pollution in the world.

Different sources of water

Rainwater is the principal source of water for this planet. This forms the basis of groundwater. We have the melting of the snow in the mountains that flow down to the plains through the various rivers.

As it flows down the plains, various other water bodies join it before merging into the seas. You have other sources of water such as lakes and ponds.

There are certain countries that do not have any of these natural sources of water. Such countries cater to the requirements of their citizens by installing desalination plants that purify sea water.

Sources of water pollution

The rivers are pristine when they descend from the melting snow caps. As they find their way to the plains, these rivers gather salts and minerals from the rocks and sand.

These salts comprise of potassium, sodium, chlorine, and magnesium along with the phosphates and the nitrates. They form the major component of the totally dissolved solids (hereinafter referred to as TDS).

You will be hearing about TDS more as we go deep into this buying guide.

In addition to the natural salts, we have humans pitching in with their contributions towards polluting this pure river water.

You have human wastes like sewage and other impurities flowing into this water. Industries contribute their mite by releasing harmful industrial chemicals such as arsenic, lead, iron, and mercury.

All these impurities find their way into the human settlements thereby causing water-borne diseases like cholera, dysentery, etc. Therefore, there is an urgent need to purify the water resources before consuming them.

This is the concept behind the functioning of the various water purifiers. You have different methods of purification based on the level of impurities and TDS in water. We shall discuss each type of filter for the benefit of all.

Types of impurities in drinking water

As discussed earlier, you have various kinds of natural salts finding their way into your kitchen through the water resources. Similarly, groundwater also contains a lot of minerals and salts in its natural form.

As you move towards the coastal areas, the proportion of salt increases in the groundwater. Now, bore well and dug wells are the primary sources of water in such areas that do not have the rivers to bank upon.

This well water needs purification because it can contain other impurities like suspended plant and animal matter in addition to the TDS.

There are municipalities in towns and cities that treat such water resources with disinfectants like chlorine. Hence, you find a higher proportion of chlorine in areas served by municipalities. This is also harmful to your health.

Your water purifier needs to take care of these impurities as well. The rivers and other water resources have to contend with human, animal, and industrial wastes.

Eliminating these wastes requires the use of modern technology like Reverse Osmosis (RO), Ultraviolet purification (UV), and Ultra-filtration methods (UF). The modern water purifiers employ any or all of these methods of purification.

The acceptable TDS levels

We have seen the concept of TDS in water. We know how it manages to find its way into the water resources. In a way, our body needs some of these minerals and salts for its healthy growth.

Hence, one should ensure not to eliminate them completely from the drinking water. Now, the question arises as to what the acceptable TDS levels are.

The normal acceptable TDS levels are as follows.

  • Below 300 – Considered to be excellent
  • In the range 300 to 600 – Good for human consumption
  • Above 600 but below 900 – Fair and acceptable
  • Between 900 and 1200 – Poor levels of TDS
  • Above 1200 – Unacceptable and unfit for drinking purposes

Note that these levels are purely indicative. In the normal course, you will find ground level as well as other water sources having TDS levels below 900.

As per the above table, it should be fair for consumption directly. Is it true? Unfortunately, the answer is NO. The level of concentration of individual elements of TDS is more important than the general TDS value.

It can happen that you might have water with TDS levels in the range of 300. But, the water can have a high concentration of arsenic or mercury and a lower concentration of other salts.

Under such circumstances, is the water safe? You have the answer at the tip of your tongue. This water is certainly not palatable. Hence, you need water purifiers to eliminate these impurities completely.

Water purification technology explained in brief

Reverse Osmosis

This is a universally popular method.

This process involves the passing of source water through a semipermeable membrane that can trap chemical impurities like arsenic, lead, mercury, and pesticide residues. This membrane can take care of the bacteria, viruses, and other microorganisms.

You are also able to eliminate TDS up to 90% using this process. The RO water filters work on a 5 or 6-stage purification depending on the configuration of the water purifier.

The sediment filter

This is an optional arrangement. Usually, you have this filter fitted outside the machine. This filter takes care of the visible suspended particles and larger impurities. This filter enhances the life of the RO membrane as it eliminates the larger particles and does not allow them to enter the machine.

You need not use this sediment filter when the input source of water is clear, especially the water treated by the municipalities before distribution to the households.

Pre-activated carbon filters

The pre-activated carbon filter removes organic and the other volatile compounds from the water that usually give the water its bad odour.

Reverse Osmosis mechanism

Working of Kent RO

The next stage of filtration is the RO filtration. In the normal course, the water does not have a tendency to move from a higher concentration to lower concentration when passing through a semipermeable membrane.

Hence, you need to use a pump to push the water through the RO membrane. This is the principle of reverse osmosis. The RO membrane removes all kinds of impurities in the water such as TDS, pesticide residue, heavy metal impurities like mercury, lead, arsenic, and biological impurities like bacteria, viruses, and microorganisms.

This water is separated into two parts, the impure part that goes down the drain and the pure and filtered water that passes through the UV chamber for the next stage of filtration.

Ultraviolet protection 

The pure water obtained through RO filtration contains traces of bacteria and viruses. This is because the RO membrane cannot filter out impurities with molecular weight less than 20. It cannot eliminate monovalent ions like sodium, etc. Hence, this water now passes through the UV chamber where the ultraviolet radiation kills all microorganisms and bacteria thereby making the water 100% safe to drink.


The resultant water now passes through an Ultrafiltration membrane to remove traces of residual impurities. This filtration membrane contains minute pores that trap any impurities that might have escaped elimination in the RO process.

Ultima RO+UV How it works

The Post-activated Carbon filter

This filter is responsible for removing the volatile organic compounds that cause the bad odour of the pure water flowing out of the RO water purifier. This improves the taste of water.

The TDS Controller

The water that comes out of the RO water purifier is pure and healthy. But, the RO mechanism eliminates almost all the TDS from the water. In fact, it removes more than 90% of TDS from the input source. This includes the good and healthy salts like calcium and magnesium, etc. These salts and minerals are necessary for the overall growth of the body.

The TDS controller solves this issue by separating the input water into two parts, A and B. Part A goes through the RO membrane whereas Part B passes through the UV / UF membrane that does not remove the TDS but kills the microorganisms.

The TDS controller then selectively mixes this water with the RO purified water thereby increasing the TDS levels and increasing the pH value of the water.

Also, Read

The Mineralizer

The disadvantage of the TDS controller is that it releases a part of the input water into the RO purified water thereby providing an opportunity for contaminating the RO purified water.

The mineralizer releases the appropriate minerals lost during the RO purification process alone. This replenishes the mineral content of the water and thus improves the quality of output water.

Which filter to buy?

You have seen the functions of different types of water filters, but the principal question remains unanswered. Which type of filter is best suited for your home? This depends on the quality of water you have as the water source.

Let us now look at the various sources of water and see the normal kinds of impurities associated with the particular source. This will enable you to decide which water purifier to choose.

TDS Levels Is the water muddypresence of biological impuritiesIdeal choice of water purifier
Below 300 ppm (Soft water)NoNoGravity based purifiers
Below 300 ppm (Soft water)NoYesUV/UF water purifiers
Below 300 ppm (Soft water with impurities)YesYesUV/UF Water Purifiers
Over 300 ppm (Hard water)NoNoRO Water Purifier with TDS Controller
Over 300 ppm (Hard water with impurities)YesYesRO + UV/UF water purifier with TDS Controller or Mineralizer

Factors to consider while buying water purifiers

Now, you have a clear idea about the nature of impurities in the water. You have an as to which water purifier to choose to tackle the kind of impurities.

You should always conduct the test of the water source at your house before deciding the type of water purifier to opt for.

Read: RO vs UV vs UF Water purifier

1. Do the TDS evaluation test to determine the amount of TDS in water.

2. If you live in an area inhabited by industries, it is better to conduct a chemical test of the water source to determine the level of industrial pollutants.

3. If in doubt, you can always go for the best, i.e. the RO + UV + UF water filters. However, remember these filters are comparatively expensive as compared to the other water filters.

4. Your budget plays a very big role in deciding the kind of water purifier you choose. While determining the budget, you should also factor the cost of maintenance and replacement of filters.

Understand the drawbacks of the RO water purifiers

The RO water purifiers employ the best water purification techniques. However, they have a major drawback in the sense that they waste a lot of water. In fact, they waste more than 50% of the input water. In this era of water shortage, this is a criminal wastage.

You have uses for the RO wastewater. However, the water that comes out as the wastewater contains a high proportion of TDS.

best water purifier 15000

Therefore, there is a need to dilute the water before using it to water your plants, cleaning the floors, etc. Also, Have a look at 12 simple ways you can save water in everyday life.

Best Water Purifier – Frequently Asked Questions

It is natural for you to have doubts when you want to get the best water purifier. This section can play a great role in clarifying your misconceptions.

Which water purifier brand offers the best after-sales services?

On this era of customer service, all water purifier brands offer good after-sales services. However, it depends on various factors such as availability of service centres in your city, accessibility to spare parts, and so on.

The best way to verify these factors is to do a local search on Google or go through Just Dial reviews. Going through the official websites or e-commerce websites where customers post their reviews is also a good way of ascertaining the after-sales service facilities of water purifier brands.

What is the annual maintenance cost (AMC) for an RO water purifier?

Most of the top water purifier brands offer regular AMC services. The rates depend on various factors. Usually, it is in the range of around Rs 4,000 per annum. However, it is better to verify from the water purifier AMC provider.

This AMC includes cost of replacement of the various filters like RO membrane, UV and UF filters, activated carbon filters, and sediment filters.

You have to replace these filters on an annual basis to extract optimum performance from your water purifier. Refer to the actual specifications

What are TDS Controllers / Modulators?

As the name suggests, TDS controllers control the proportion of TDS in the water coming out of the RO water purifier.

Why do you need these controllers?

The RO purifiers reduce the hardness of input water by approximately 90%. Hence, if the TDS level of the water source is around 800, the TDS proportion of the output water will be in the range of 80.

This water with a low TDS level does not have a good taste. Secondly, you need some minerals and salts in the water to enhance the taste.

The TDS controllers work in the following manner. The TDS controller divides the water that goes into the RO water system into two parts.

One part goes through the RO membrane whereas the other part goes into the UV and UF filters. The water that goes through the UV and UF filters do not undergo any change in the TDS levels. Therefore you get two different outputs.

The final output is a mixture of both these waters. This is the job of the TDS modulator.

What is Mineralizer / Mineral guard in Aquaguard water purifier?

One must admit that the RO water purifier does a great job of purifying the water. But, it removes essential minerals along with the hazardous ones. This leaves the output water with a bland taste that does not have much nutrient value.

Therefore, you have water purifier brands including an extra stage of filtration that ensures the addition of essential minerals to the water. This helps in maintaining the pH balance as well. Different brands have different names for these mineralizers. Aquaguard names it ‘Mineral Guard’.

What is Kent Mineral RO technology?

Kent uses a multi-filtration process to purify drinking water. This brand works on a patented technology known as Kent Mineral RO technology that uses double purification processes.

It is a combination of Reverse Osmosis (RO) and Ultraviolet (UV) or Ultrafiltration (UF) to not only remove dissolved impurities but also retain essential minerals. This results in 100% safe and pure drinking water.

What is LG True RO filtration?

Every water purifier brand has its individual preferences. LG prefers not to use the TDS controller in its machines.

Hence, there is no question of mixing of waters with two different TDS compositions. The technology envisages the separation of water at the pre-sediment filtering stage.

One part goes into the sediment filter followed by the activated carbon filters and RO membrane. The output water passes through a mineral booster and post-carbon filter. This is fit for drinking purposes. The other part directly goes into the UF system with the output water being fit for cleaning vegetables and fruits.

What is Biotron Cartridge in Aquaguard water purifier?

biotron technologyBiotron technology is a patented technology used by Aquaguard water purifiers. This technology works on the principle of unlocking the minerals for better absorption.

It involves the breaking of water molecules into fine micro-clusters thereby making the water ‘bio-available’. This breaking down of water molecules ensures easier penetration through the cell walls. Hence, you have a higher degree of hydration.

How much water is wasted with RO water purifier?

The biggest drawback of RO water purifiers is that it wastes water a lot. For every litre of pure water it produces, the machines waste 2 litres of water. The wastage of water depends on the quality of the input water.

The higher the TDS of input water, the higher is the wastage.

How do you use reject water?

The reject water contains 95 to 99% of impurities. Hence, this water is absolutely unfit for human consumption.

However, there are other uses. You can use this water for gardening, cleaning utensils, mopping floors, cleaning bathroom floors and toilets. However, one should note to wash the utensils with tap water to remove the salt deposits.

The same logic applies to washing floors and toilets as well.

What is ABS Plastic Storage tank in water purifiers?

Storage tanks are essential ingredients in any water purifier. These storage tanks are anywhere in the capacity of 10 litres or more. Hence, you need strong material to withstand the weight of the machine as well as the water.

ABS (Acrylonitrile Butadiene Styrene) is a thermoplastic polymer capable of withstanding high-temperature fluctuations. It is a recyclable material much unlike the thermoset plastics. They are non-toxic in nature.

This makes this material perfect for manufacturing water storage tanks.

ABS Plastic or Stainless Steel tank – Which is better?

In a way both are good. However, steel is comparatively heavier to ABS plastic. Secondly, ABS plastic is non-toxic and more durable than steel.

They can withstand a high-temperature range. This makes them the perfect material to manufacture storage tanks, especially in the case of water heaters and water purifiers.

ABS plastic does not require as much maintenance as required by steel tanks. Hence, they are preferable to stainless steel tanks today.

What is ART (Advance Recovery Technology) in AO Smith water purifiers?

The wastage of water is the biggest disadvantage of RO water purifiers.

You will notice that an RO water purifier wastes 2 times the water it purifies on an average. This can be criminal in today’s times of water shortage.

AO Smith, the leader in water purification technology has come up with a new patented technology known as Advance Recovery Technology (ART) that envisages saving twice the amount of amount of water than a standard RO water purifier. At the same time, this technology ensures 100% RO purification.

Is it safe to buy water purifier online?

It depends on the customer and the website from where he chooses to purchase. Some people are more comfortable buying water purifiers after having a look at the features. Some people are comfortable buying online.

However, one should go for reputed brands from reliable websites like Amazon or Flipkart. You get good deals at these websites.

Can I buy a non-branded RO water purifier?

It is never advisable to buy a non-branded water purifier. Your health is always more important.

Invest in a reputed brand because of the quality you get. Non-branded water purifiers do not have TDS controllers or mineralizers.

This affects the quality of the output. These locally made water purifiers might be inexpensive, but they are not worth investing. You will lose all the minerals in the water when you opt to buy the cheap ones.

Final Words – Wrapping it up

You have just gone through the RO water purifier buying guide. This guide should help you make an easy decision about opting for the best water purifier.

We have seen the differences between the various purification technologies and seen that a combination of all these technologies is the best option available to you.

Hence, you find the major water purifier brands manufacturing water purifiers with multi-filtration technologies. Hence, a water purifier providing RO+UV+UF+TDS Controller facilities should be the right one to go ahead.

These are the Best water purifiers in India for home use. The list will be updated on a regular basis. If you have any queries reading the selection of water purifiers, post them in the comments section below, and I will be glad to answer them.

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Iam a resident of telangana, my water source is municipal water, tds around 250-280 which water purifier should i buy?
How is 3m water purifier? MODEL- IAS140S,RO-R8 CW.
Is UV/UF water purifier enough for me or should i go for a RO purifier?
And what do suggest for whole house filtration systems??
Kindly give your advice.


3M whole house filtration system foes not require any electricity and removes impurities like dirt, mud and other suspended impurities that are larger than 5 microns.

Normal UF water purifiers (UltraFiltration) comes with a pore size of 0.1 microns and are capable of removing bacterium and cysts from the water which is not possible with 3M filtration.

The TDS levels in your water source are below 300ppm and good. So, there is no need to for a Reverse Osmosis water purifier. You can simply install a UV/UF water purifier like Kent Maxx, Havells UV Plus or Aquaguard superb UV Uf water purifier.



I am a resident of himachal pradesh, interested in buying a water purifier but getting confused after reading lots of articles on same.
our water source is river water that comes from the glaciers. The TDS level is 24 mg/liter. For this i am sure i should not go with the RO system. But for UV+UF please suggest me a good brand in terms of service and reliability. Havells UV plus or Kent Maxx? Or any other brand/model as per your experience?



The TDS levels in your water source are good and there is no need for an Reverse Osmosis water purifier. Both the models you have mentioned are the best selling UV UF water purifier models in India and the purification process is almost same. Contact customer service of both the brands and opt for the one that provides quick support at your place. Also, the AMC for UV UF models will be around 1500 per year and not much maintenance is required.


Thank you so much for replying and clearing my doubt.


Im living in chennai. I use borewater which is yellow water (high iron content).
Currently I do two levels of Filteration:

Level 1: Iron remover plant (MORF India). Output Water TDS – 912. AMC-Rs.3000/yr
Level 2: Water Purifier (Aquaguard – RO Only). Output Water TDS – 115. AMC-Rs.4500/yr

I Prefer to change Level 2 Water Purifier. Reason – Current Purifier is 12 years Old. But still runs good.

Do I need RO + UV + UF OR just RO is enough?
But certainly I would like to add minerals at the end of the cleaning proces.
Kindly recommend a suitable water purifier for my case.
Note: Still I would have Level 1 Plant.


Hi There, Some of the RO models come with UV/UF to ensure the water is 99% free from contaminants. Also, TDS Controllers are used to retaining the natural minerals in the water. In Some RO models, 100% water passes through the RO membrane and minerals were added at the end of the purification process. Such models were recommended if the water source is very bad. Otherwise, RO models with TDS COntrollers are also good. Have a look at the below models.

LG Puricare WW150NP RO + UV Water Purifier with Dual Protection Stainless Steel Tank (Amazon Link – https://amzn.to/2NnSZJQ)

Eureka Forbes Aquasure from Aquaguard Delight RO+UV+MTDS (Amazon Link – https://amzn.to/33PV07p)

Kent Grand with RO + UV/UF + TDS Controller (Amazon Link – https://amzn.to/2Zjj8f4)

Eureka Forbes Aquaguard Enhance Ro+Uv+Uf+Mtds Water Purifier (Amazon Link – https://amzn.to/31Yj8mx)

Please read this post to know the difference between TDS Controller and Mineral booster (https://www.kitchenarena.in/tds-controller-vs-mineralizer/)


The ground water in khagaria bihar is highly Iron concentrated….. wich type of water purifier should I use.


What is the level of the TDS in your water source? If it is more than 2000ppm, domestic water purifiers are of no use.

Anything less than 2000ppm, you can use an RO water purifier. To remove iron impurities from the water, you definitely need to install an RO water purifier. Reverse Osmosis is capable of removing Salts and Hard metals from the water.

To find the TDS levels in the water, you can use a TDS meter or you can take the water sample to the nearest lab.

Also, most of the Reverse Osmosis water purifier comes with UV/UF combination to ensure the water is 100% free from contaminants.

Some of the RO models come with TDS Controllers and some models have Mineralizer.

In your case, it is better to opt for a 100% RO water purifier with Mineralizer where 100% water flows through the Reverse Osmosis chamber.

RO models with TDS Controllers allow some water directly into UV/UF chambers.

As your water has a high concentration of Iron, it is better to go with 100% RO models. There are many such models available from top brands.


I want to buy water purifier but i little bit confused which one i should go. There are some technology like RO, UV, UF. Please suggest me which one is best.


What are the TDS levels in your water? What is your water supply source? If you get water from borewell or multiple sources, you can install an RO water purifier. Most of the ro water purifiers come with the combination of uv/uf for providing additional safety.


How is the other Livpure Glo Lite7 litres RO+UF without mineraliser ?


That model comes with a TDS Controller to retain the natural minerals. Both methods are good. Normally RO is enough to remove all the contaminants from the water. UV/UF are used for extra safety. Livpure Glo lite comes with RO + UF combination. If Livpure provides good service at your place, you can go with that model.


Is there any difference between kent grand star and kent grand wrt performance?


Performance and purification wise, there is no difference. But, the Kent Grand Star comes with a -built UV disinfection in the storage tank so you can store the water for a long time in the 9-litre storage tank. Also, there is a Digital display which allows you to monitor the status of the tank, filter life and water quality.

But, the output water quality for both the water purifiers is same.



Please suggest the best water purifier for me,

We are getting water from multiple sources sometime municipal, tank and borewell and TDS like 200-250, 400-500 and 800-900 respectively.

I am confused between two technologies one use by Kent (RO+VU+UF+TDS) and other use by aquaguard (RO+ UV + MTDS) with mineral guard and active cooper etc.

I have short listed few model, Kent Grand * , Kent Grand Plus, Kent Prime, Aquaguard Reviva Nxt( RO+UV+MTDS) andDr. Aquaguard Magna Nxt HD(RO+UV+MTDS).

At present, I am using Aquagaud RO Reviva from last 12 years.



If you are getting water from multiple sources and the TDS range is above 300ppm, you have to opt for an RO water purifier.

In general RO (Reverse Osmosis) is enough to remove all the hard metals, bacterium and other contaminants from the water. But, some RO water purifier comes with TDS Controllers for retaining natural minerals in the water and other models use Mineral Cartridges to add natural minerals at the end of the purification process.

Please have a look the below articles to know the full difference


Go for the brand that provides quick support at your place. The AMC for an RO water purifier will be around Rs.4000


Thank Shiva,

One more query, does mineralizer/mineral cartridge add mineral or retain mineral naturally available in water? Or add from artificial resource.


Mineralizer adds natural minerals at the end of the purification process. It does not retain the natural minerals that are already present in the water. TDS Controller retains natural minerals. Please read this post to know the full difference



Thanks shiva,

Which one you recommend, for eureka and kent service good in my area. And I am already using eureka from last 10 years


Which do purifier wastes the least water? People say it’s Kent supreme but generally the reviews are not good for Kent supreme.


Kent Supreme and AO Smith Z8 are some of the best selling RO water purifiers with less water wastage. The service quality provided by these brands might differ from one place to other.

Also, Please have a look at the below post



Hi .. very useful blog. I live in Bangalore, where we get multiple source water (mixed). I am not convinced with Kent or other major brands who advertise much but service delivery is poor.

What is your opinion about BRITA water purifiers? They are slightly expensive, and are not into major advertising yet, but their product specs look impressive – RO + UF + UV filtration, Alkatron technology to infuse lost minerals, stainless steel storage container, good service promise (call back in 1 hour, issue resolution in 1 day) etc. Also in their AMC they promise even the RO filter replacement.

Any thoughts would be welcome.



The Purification process is almost same in Brita or any other major RO water purifier brand. These water purifier brands use different | Attractive technology names for the simple purification process. At the end of the day, RO purification process is all the same. Some brand use TDS Controllers and some use Mineralizers for retaining the natural minerals that are lost during the RO purification process.







Please take the water sample to the nearest lab to find mineral content in the water.


Our TDS is under 200. Do I still need RO or UV should do? What brand would you recommend


TDS 200ppm is good. RO is not required. Simply install a UV/UF water purifier like Kent Maxx.


My borewell water TDS is above 1200, we 4 members in my family. Could you please suggest best water purifier. And what is the cycle period for service or membrane change


The TDS levels in your water Are very high, you have to opt for an RO water purifier that removes the TDS from hard water. Filter change depends on water quality and usage. In general, you have to change the filters once in a year and the annual maintenance cost for an RO water purifier will be around Rs. 4000. You can have a look at the below models.

Havells Max (Amazon Link – https://amzn.to/2CmHrQx)
Blue Star Aristo (Amazon Link – https://amzn.to/2ClTD4f)
Kent Grand Plus (Amazon Link – http://amzn.to/2vNuihO)
Kent ACE Mineral (https://amzn.to/2LKalx7)


I have boring water , measure TDS above 1000, lived at Madhyamgram, Kolkata , West Bengal.

I opt for 1.Havells, 2. Kent

Which one is best for me ?


Both the brands you have mentioned are good and the RO purification process is almost same in both the models. So, please inquire about the service quality provided by these brands at your place and opt for the brand that provides quick support.


I am planning for a new water purifier . I was staying at goa and was using aquaguard basic model . I just relocated to Visakhapatnam and I found very hard water supplied here. Can any one suggest for a good water purifier as my basic aquaguard is unable to dispense good quality may be RO required .

My choice was

1. AO Smith

2. Havells

Pl suggest if any thing is better and good customer services at Visakhapatnam.


If you want an RO water purifier with hot water dispenser option, you can opt for AO Z8 RO water purifier (Amazon Link – https://amzn.to/2LLQkq7) Havells Max RO UV is one of the best selling RO water purifiers and is suitable for a medium family (Amazon link – https://amzn.to/2AsZYZA). The customer support offered by these brands might vary from one place to the other even within the same city. So, please inquire about the service quality with your neighbours.


Hi Chaitanya,

I need ur advice on selection of water purifier for my house. I checked near by shops and each of them were suggesting Kent prime plus, Aqua guard Superb/geneus and LG RO=UF model.

My TDS when i checked was around 400 in bore water. Could you suggest which one to choose and about the AMC which one is best??


No Matter what brand you purchase, the AMC for almost all the RO water purifiers will be around Rs.3000 to Rs.4000

The models mentioned by those shopkeepers are good. You can opt for the brand that provides quick service at your place.


Hello Chaitanya,

Very informative blog. Need your suggestion on choosing a Water Purifier. I’m from Bangalore and I’ve mixed water source with TDS level of around 500-600.

Which purifier would best suit me, budget not an issue.

Thanks in advance.


What is the meaning of AMC? Explain.



Meaning of AMC stands Annual Maintenance contract which used take original manufacture or authorized service dealers or any service experts. I suggest When your machine cross warranty periods than you can go for AMC. Its need to be decided based on your area quality of water, power system controls, based on your maintenance knowledge etc.,

Baskaran P

Maintenance Engineer for large scale industries.


Which is the suitable water purifier where water supply is short say 1 hour


Hi Sir,

The TDS level in water is 1200 here. We saw some with floating materials after boiling the water. Please suggest which one will be best and secured for health for one year baby.

1. LG

2. AO Smith

3. Havells

4. Blustar

We need 6-10 lt water preserver capacity. We are not worried about hot/cold water. Room temperature water is sufficient for us. We will appreciate your suggestion.


LG water purifiers are priced a little bit on the higher side and comes with stainless steel tank.

LG Puricare WW180EP (Amazon Link – https://amzn.to/2TDU8kT)

Havells and Blue Star models are also popular and offers 100% RO Purification. You can have a look at the below models.

Havells Max (Amazon Link – https://amzn.to/2CmHrQx)

Blue Star Aristo (Amazon Link – https://amzn.to/2ClTD4f)

Go for the brand that provides timely service at your location.