Are you looking for the best water purifier for your home?

Well, you’ve come to the right place.

Water from natural sources like rivers and lakes get contaminated with the human, plant, animal, and industrial waste.

Municipalities add chlorine or fluorine to the groundwater to get rid of viruses and bacteria. Despite these efforts, our tap water contains harmful chemicals.

Therefore, installing the best water purifier should be a priority for every home in India.

On a simple note, If the TDS levels in your water source are above 300ppm or you get water from multiple sources, you have to opt for an RO water purifier.

Most of the RO water purifiers come with the combination of UV, UF filters to ensure that the water is 100% free from contaminants.

You might get confused by various marketing terms like RO, UV, UF, TDS, Mineralizer…

We highly recommend you to read the Water Purifier Buying Guide at the end of the article to get in-depth knowledge about all the water purification technologies.

Best Water Purifier in India

1. Kent Supreme Plus 2020 RO + UV + UF + TDS Zero Water Wastage

Kent water purifiers are the perennial favourites for Indian homemakers. Kent has a water purifier model suited for almost all requirements. The Kent Supreme Plus 2020 is a comprehensive product blessed with excellent features.

  • Zero Water wastage
  • TDS Control system
  • RO + UF + UV + UV_LED
  • Eight-litre storage
  • Fully automatic
  • Wall-mounted design

Besides providing pure and mineral-rich water, this Kent Supreme Plus 2020 water purifier does not waste any water. The Zero Water Wastage Technology involves recirculating the rejected water to the overhead tank using its pump.

This water purifier uses a multi-purification process, including RO, UV, UF, and UV_LED, to ensure the supply of absolutely pure water to the household. It is the ideal appliance to treat brackish, tap, and municipal corporation water.

The in-built TDS controller ensures the replenishment of essential minerals lost during the RO purification process. By removing bacteria, viruses, and TDS, this water filter improves the taste of water considerably.

The In-tank UV disinfection feature maintains the water purity in the storage tank for extended periods. The purification capacity of 20 L/hr and the storage tank capacity of eight litres are excellent features that ensure proper supply of pure water even in the absence of electricity.

The Kent Supreme Plus 2020 is a modern water purifier in all respects as it features computer-controlled and automatic operations. The features include Filter Change Alarm and UV Fail Alarm.

Pros
  • Excellent purification process
  • Ideal for houses located in coastal areas and the industrial belt
  • Suitable for a family of four
Cons
  • Filter replacement costs are additional expenses.
  • White colour entails regular cleaning.

2. HUL Pureit Copper+ Mineral RO + UV + UF 7-Stage water purifier

Copper has water purification qualities. It explains why our forefathers used copper vessels for storing water. HUL Pureit uses the same principle in designing this water purifier.

  • Capacity of 8 liters
  • RO+UV+MF with Mineralizer facility
  • Charges RO water with 99.8% pure copper
  • Can be used for TDS upto 2000ppm
  • ABS Plastic Food Safe tank
  • One year warranty

This appliance infuses the health benefits of copper in 100% RO purified water. Thus, you have one of the best water purifiers for home working day and night to ensure an uninterrupted stream of pure and healthy water for your family.

The water purification consists of a seven-stage process that includes the use of,

  • Pre-sediment filter to remove large impurities
  • Pre-RO activated carbon filter for eliminating bad odour and organic contaminants
  • Wire mesh filter to trap the significant soluble pollutants
  • RO membrane to carry out 100% water purification
  • UF membrane to remove the traces of any TDS that manage to seep through
  • UV reactor to get rid of bacteria, viruses, and other microorganisms
  • Post-RO activated carbon filter to enhance the taste of water

This water purifier comes with a dual water dispensing option. You get pure RO water as well as copper-charged RO water, thereby enabling you to enjoy the medicinal benefits of copper.

The system ensures infusing the right amount of copper in every glass of water.

The water purifier is an intelligent one, as it smartly senses and schedules auto cleaning, thereby ensuring the supply of fresh copper at all times.

The appliance comes equipped with an 8L water storage tank that should prove adequate for an average Indian family.

HUL Pureit water purifier comes with additional features like Double Purity Lock that ensures the machine does not dispense a single drop of unsafe water.

The Advance Alert System alerts you 15 days before the expiry of the Germkill Kit. The Auto Shut-Off feature shuts off water purification and supply after the expire of the Germkill Kit.

Pros
  • Advantage of copper purification
  • The 7-stage water purification process
  • Automatic shut off feature
Cons
  • Wastes water during the RO purification process

3. Eureka Forbes AquaSure Amaze 7L RO+UV+MTDS Water purifier

Eureka Forbes has a reputation for being a market leader in consumer appliances. It has won the trust of more than 15 million families in India.  

  • Advanced RO + UV + MTDS purification
  • Suitable for use for TDS levels 200 to 2000
  • The storage capacity of seven litres
  • Food grade plastic
  • LED indicators

Eureka Forbes has manufactured this water purifier product primarily to cater to the urban clientele. The 7L water storage tank is ideal for the nuclear Indian family.

The water purifier features a multi-stage purification process including RO, UV, and MTDS to ensure delivery of 100% pure water. The UV water purification ensures the elimination of disease-causing bacteria, thereby making water healthy for drinking.

The MTDS feature ensures the replenishment of essential minerals like calcium and magnesium that get eliminated during the RO water purification stage. It adjusts the water taste according to the quality of source water.

This water purifier features a durable cartridge capable of lasting for up to 6000 litres. The smart indicator feature alerts you when the cartridge is due for replacement. The smart LED indicators for tank-full and power-on status are welcome additional features.

This water purifier is an eco-friendly product as it features an Energy-saving mode. It switches off automatically when the water tank becomes full.

The sleek and compact design fits with your kitchen décor beautifully. The best feature of this product is its flexible installation. You can mount the appliance on the wall or place it on the kitchen counter comfortably.

Pros
  • Excellent after-sales service available
  • Multi-stage purification
  • Durable cartridge
Cons
  • 7L tank capacity is inadequate for large families
  • The water tap is not in-built but a separate attachment.

4. Kent Grand Plus 9L RO+UV+UF+TDS Zero Water Wastage 

Kent Grand Plus ZWW is another excellent water purifier model that uses patented ROTM technology to make water 100% safe for drinking. It features a multi-stage purification process to make water potable.

  • Multiple purifications including RO, UV, UF, and TDS
  • Zero water wastage
  • TDS Controller
  • UV LED protection in the storage tank.
  • The capacity of nine litres
  • Wall-mounted design

The multiple purification technologies use RO to eliminate TDS and other heavy impurities like lead, arsenic, and antimony from source water. UV technology ensures the elimination of bacteria and viruses. TDS controller improves the water taste by replenishing essential chemicals.

Generally, RO purification results in water wastage. This product uses Zero Water Wastage technology to recirculate the rejected water to the overhead tanks for alternative uses like watering plants, utensils, and flushing toilets.

This water purifier features a nine-litre storage tank to cater to the conveniences of an Indian family of four persons. The 20 L/hr water purification rate is excellent.

The storage tank features a separate UV-LED lamp to ensure that the purified water does not get contaminated by bacteria. Therefore, you get 100% pure water all the time.

This water purifier is an ideal appliance in places having high TDS levels. People living in coastal areas and depending on borewell water supply would cherish this water purifier the most.

Some of the additional features are the presence of UF and Activated Carbon filters to remove organic impurities and improve the taste of water.

The wall-mounted design occupies less space and adds to the kitchen ambience by blending beautifully with other kitchen appliances.

Pros
  • Optimum use of rejected water
  • Excellent water purification
  • Maintains water purity even during storage
Cons
  • Recurring maintenance costs
  • Product available only in white colour

5. 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
  • Can be used for TDS upto 2000ppm
  •  Hot water at the press of a button
  • 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.

Pros
  • 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
Cons
  • Issues with after-sales services

6. Faber Galaxy Plus RO + UV + UF + MAT 9L water purifier

This Faber Galaxy water purifier is better than the one discussed earlier because of its 8-stage filtration process.

  • Capacity of 9 liters
  • RO+UV+UF+MAT
  • Can be used for TDS upto 2500ppm
  • Mineral Addition
  • Food-grade plastic storage tank
  • One year warranty

The purification process includes a UV filtration procedure to take care of harmful germs and bacteria at the final stage of water purification. This enhanced level of water purification ensures that it is one of the best water purifiers available in India under Rs 15,000.

The highlights of this water purifier include its elegant designing that blends well with your kitchen décor and makes the water purifier look a part of the modern kitchen.

The RO membrane is an advanced one that can handle water with TDS levels as high as 2500ppm. Therefore, it should qualify as one of the best water purifiers for all sources of water, including groundwater, borewell water, and municipality-supplied drinking water.

The Faber Galaxy Plus water purifier comes with an 8-stage purification process that includes RO, UV, and UF processes, thereby ensuring the supply of high-quality pure and hygienically safe water.

This water purifier has the additional advantage of MAT technology to enhance the taste of purified RO water. This Mineral Addition Technology helps in adding essential minerals that get lost during the RO water purification process.

Another excellent feature of the Faber Galaxy Plus water purifier is the Copper Guard technology to eliminate foul odour from the pure water. The high storage capacity of nine litres should prove adequate for the entire family.

The ABS Food Grade Plastic tank also ensures to maintain the purity level of water during its storage.

Pros
  • Fabulous design that enhances the look of your modern kitchen
  • 8-stage filtration procedure including Ro, UV, and UF
  • Can handle TDS levels up to 2500 ppm
Cons
  • Service Quality is not up to the mark in some areas

7. AO Smith Z9 Green RO 10L RO + SCMT Water Purifier

AO Smith is a reputed international brand of water purifiers available in the Indian market at affordable prices.

  • Capacity of 10 liters
  • RO purification with mineralizer facility
  • Can be used for TDS upto 2000ppm
  • Hot water at the press of a button
  •  Advance Water Recovery Technology
  • One year warranty

One of the significant advantages of AO Smith Z9 water purifier is the patented Advance Recovery Technology.

This technology allows the appliance to save two times more water than the standard RO water purifier. It also ensures minimum wastage of essential minerals during the RO purification process.

The 8-stage water purifying process includes RO + SCMT technology along with MIN-TECH. SCMT ensures secondary microbial purification to ensure there is no recontamination of pure water by harmful microbes.

MIN-TECH adds back the essential minerals that get lost during the RO purification process. Thus, AO Smith Z9 Green ranks as one of the best water purifiers in India in 2020.

The additional advantage of this water purifying system is that you have a choice between obtaining pure water at 450C and 800C at a press of a button. This hot water is ideal for cooking, whereby you do not have to heat the water again.

With AO Smith Z9 Green water purifier, you do not have to search for the controls, as this purifier has a Night Assist feature to locate the appliance. The digital display provides useful information such as water temperature, full tank indication, and filter alerts.

The water level indicator is a handy tool to help you judge the level of pure water in the 10L food-grade water storage can. Another innovative feature is the presence of a drip tray that ensures you do not mess around the place with water spillages.

The aesthetic looks of the AO Smith Z9 Green water purifier make it one of the best purifiers for water with TDS levels up to 2000ppm.

Pros
  • Hot and cold-water options
  • Aesthetic appearance
  • Less wastage of water
  • Low power consumption
Cons
  • Water refill process starts only when the water level reaches 50% capacity

8. LG Puricare WW150NP RO + UV Water purifier

LG is a renowned consumer appliance manufacturer in India. The success of LG air conditioners, TVs, and refrigerators should be proof that Indian consumers trust LG to deliver exceptional performances. This LG Puricare water purifier does not disappoint in any way.

  • Capacity of 8 liters
  • 100% RO purification 
  • Can be used for TDS upto 2000ppm
  • Dual Protection Stainless Steel Tank
  • One year warranty

The WW150NP water purifier comes with a dual protection stainless steel tank that maintains the freshness of water while reducing the growth of bacteria and algae.

This water purifier features a 5-stage RO water purification process that includes the use of a UV lamp to eliminate harmful germs and bacteria from RO purified water to make it absolutely safe for drinking.

At the same time, it also ensures to maintain the mineral content in the purified water at all times.

The most significant advantage of this water purifier is the Stainless-Steel Certification that proves that the water storage tank has 94.4% less E-coli growth in 24 hours as compared to plastic and fibre tanks.

This water purifier has an advanced RO water purification technology that removes viruses and bacteria at the purification stage, thus obviating the need for a UV lamp at the purification stage.

However, the UV lamp proves handy during the water-preservation phase, thereby ensuring dual protection. The UV purification cycle starts every six hours.

This water purifier employs the most hygienic way of purifying water using digital sterilisation without any harmful chemicals. However, one should ensure to used LG-certified filters and genuine spare parts to retain the efficiency of the product.

Other useful features include a filter change indicator to alert you whenever a change of filter is due. This LG water purifier is one of the best water purifiers under Rs 20,000.

Pros
  • Dual protection water purifying system
  • Does not mix impure water to control TDS levels like some water purifiers do
  • One of the best water purifiers for groundwater
  • Excellent looks complemented by fantastic performance
Cons
  • Does not have UV at the purification stage but compensates during the preservation stage

9. Eureka Forbes Aquaguard Marvel 8L RO+UV+MTDS

Along with Kent, Aquaguard is a reputed model cherished by Indians. Eureka Forbes is one of the renowned companies to manufacture water purifiers of high-quality in India. This Aquaguard Marvel 8L model is one of the bestsellers today.

  • Multi-stage purification including RO and UV
  • Eight litres storage capacity
  • Active Copper technology
  • Taste Adjuster (MTDS) controller
  • Mineral Guard Technology

Traditionally, copper has water purification properties. The Aquaguard Marvel water purifier harnesses this technology to bring out the best qualities of copper to assist in water purification. The Active Copper technology works by infusing copper ions in the water to purify it.

Besides the multi-stage purification process involving RO and UV, this water purifier features Mineral Guard technology to replenish essential minerals like magnesium and calcium to deliver healthy drinking water.

The UV e-boiling technology ensures the elimination of bacteria and viruses to provide pure and healthy water as boiled for 20 minutes.

This water purifier is ideal for purifying all types of water, irrespective of its source. The Advanced Taste Adjusted Technology enhances the water taste considerably.

The source water passes through multiple purification stages like I-filter, Chemi-block, mineral-guard, MTDS, RO cartridge, UV e-boiling, and Active Copper to emerge in its purest form.

The I-filter removes suspended particles, whereas the Chemi-block filter reduces excess chlorine and eliminates organic impurities while absorbing the bad taste and odour.

Appearance-wise, this Aquaguard Marvel water filter has aesthetic looks. The large storage capacity of eight litres ensures the pure water supply for a family of four persons consistently.

Pros
  • Multi-stage purification process
  • Copper purification technology is an innovative one.
  • A compact design with a metallic finish
Cons
  • Installation costs are additional.
  • Customers have complained of bad after-sales service.

10. Havells Max-Alkaline 7-litre RO + UV Water Purifier

Havells Max water purifier has a fantastic design, as it enables you to place the water purifier at the corners. The other water purifier designs discussed here have a rectangular shape that makes it challenging to place at the corners of the kitchen. Hence, this design has an advantage over the other water purifier designs.

  • Capacity of 7 liters
  • RO and UV purification
  • Can be used for TDS upto 2000ppm
  • Food-grade plastic storage tank
  • One year warranty

Users can save a lot of space with Havells water purifier. On the performance front, the Havells water purifier ranks as among the best water purifiers in India in 2020 because it comes with fascinating features.

This Havells water purifier features a 7-stage water purification process that includes RO and UV water purification. It contains the standard sediment filter, activated carbon pre and post RO filtration, RO membrane, and Ultraviolet lamp water purification.

Alkaline water has specific health benefits. This Havells water purifier comes with Mineralz Technology that adds natural minerals with trace elements to enhance the pH value of the purified water.

The Revitalizer feature ensures to improve hydration and mineral absorption, thereby improving the taste and quality of the purified water.

Some of the other handy features include the self-diagnostic friendly alerts, tank-full indicator, and error alerts for UV, SV, and pump failure.

All RO water purifiers waste a lot of water during the water purification process. This RO water purifier is not different in this regard. Havells suggests reusing the wastewater for washing utensils, clothes, and for gardening purposes.

Pros
  • Excellent design that permits users to hang the appliance at the corners without affecting its utility
  • 7-stage water purification process including UV
  • Revitaliser and Mineralz technology to enhance the pH value and improve alkalinity
Cons
  • Maintenance can be expensive as with other RO water purifiers

11. HUL Pureit Eco Water Saver 10L RO+UV+MF Water purifier

HUL Pureit water purifiers are renowned for saving water. Studies show that this appliance saves up to 80 glasses of water as compared to other RO water purifiers. Hence, this water purifier is amongst the most popular products in India today.

  • Multi-stage purification including RO, UV, and MF
  • The capacity of 10 litres
  • Ideal for use for TDS levels up to 2000
  • Water-saving technology
  • Wall-mounted design
  • Food-grade plastic

Generally, RO water purifiers waste around two glasses of water while purifying one glass. It depends a lot on the TDS levels. This HUL Pureit Eco Water Saver product comes with Eco recovery technology to effect 60% water recovery, thereby saving around 80 glasses of water daily.

It employs a 7-stage water purification process including RO, UV, and MF to eliminate contaminants, TDS, harmful chemicals, bacteria, viruses, and pesticides from drinking water. Finally, the water purifier enriches the purified water with minerals like calcium and magnesium to improve its overall taste.

The 10-litre storage tank is one of the most spacious available on the Indian market today. It can comfortably cater to large Indian families.

This water purifier features an advanced alert system that warns you a fortnight before the expiry of the Germkill kit. Thus, you never run out of sufficient supply of pure water.

The best aspect of this water purifier is that it comes equipped with an Auto Shut Off system that shuts off the water supply if the Germkill kit expires and remains unchanged.

Pros
  • Saves more water as compared to other RO water purifiers
  • Advanced alert system to ensure 100% purification
  • Suitable for all water source types including tanker water, borewells, and tap water
Cons
  • A couple of users complained about water droplets leaking from the storage tank
  • Spares not readily available for replacement

12. Eureka Forbes Aquasure – RO + UV + MTDS Water Purifier

Eureka Forbes is among the earliest manufacturers of water purification appliances in India. This model from Eureka Forbes comes with state-of-the-art purification processes like RO, UV, and MTDS, thereby ensuring the supply of pure and hygienic water to its users.

  • Capacity of 6 liters
  • RO + UV + MTDS
  • Can be used for TDS upto 2000ppm
  • Food-grade plastic storage tank
  • One year warranty

The Aquasure model employs multi-stage purification that is a combination of RO and UV.

The water purifier comes with long-lasting cartridges that can sustain its quality for more than 6000 litres. During the RO water purification process, the essential minerals get lost as well as the heavy metal contaminants. Therefore, the resultant water is pure but lacks nourishment.

The MTDS feature ensures to replace the lost minerals with essential salts like magnesium, calcium, and potassium to enhance the hygienic value of water.

This Aquasure water purifier comes with a large storage tank having a capacity of seven litres that should prove enough for a regular Indian family.

The energy-saving mode cuts off the supply of power to the appliance when the storage tank becomes full. It starts the device again when the water goes below the minimum level. Therefore, it counts as one of the best water purifiers that can save power.

It comes with a sleek design that adds a lot of glamour to your kitchen. The system is such that it is possible to place the water purifier on the kitchen countertop or hang it from the walls, as well.

Eureka Forbes has an extensive service network, whereby it becomes easy to service the appliance in case you face problems with the same.

Pros
  • Excellent service network
  • Impeccable performance
  • One of the best water purifiers under Rs 10,000
Cons
  • As with other RO water purifiers, this appliance wastes water during its purification

13. Blue Star Majesto MA4BSAM02 8L RO + UV Water Purifier

Blue Star is a reputed manufacturer of consumer durables, especially the air conditioning systems and refrigerators. The Blue Star brand of water purifiers is also one of the best water purifiers in India in 2020 for hard water purification.

  • Capacity of 8 liters
  • RO + UV purification 
  • Can be used for TDS upto 2000ppm
  • Food-grade plastic storage tank
  • One year warranty

This feature-loaded water purifier is ideal for handling input water sources having TDS levels up to 2000.

One of the highlights of this water purification system is the use of Aqua Booster that enhances the taste of RO purified water by replenishing the minerals lost during the purification process.

The double-layered water purification method ensures a supply of 100% pure and safe water to drink. This water purifier comes with sufficient storage up to eight litres that should be enough for an average Indian family.

The six-stage water purification process consists of,

  • Pre-filter to trap large insoluble contaminants
  • Pre-carbon filter to eliminate bad odour and organic waste
  • Sediment filter to remove large-sized soluble pollutants
  • RO membrane to get rid of TDS and heavy metal impurities
  • UV lamp to take care of microorganisms
  • Post-Carbon filter with Aqua Taste Booster to enhance the taste of purified RO water

The post-carbon filter comprises of copper-impregnated carbon, thereby ensuring that you get the benefit of the medicinal uses of copper. This sleek and stylish water purifier comes in two modes, wall-mountable and allows placing on a countertop.

Other notable features include a tank-full indicator that automatically stops the supply of water to the appliance. The child-lock feature is a useful one, as it prevents your children from fiddling with the water purifier controls.

The Majesto should be an ideal addition to your modern kitchen because of its exquisite looks and performance.

Pros
  • Child-lock feature prevents accidental spillover
  • Aqua booster enhances the taste of water
  • Good performance with sleek looks
Cons
  • No TDS controller or Mineraliser feature to replenish lost minerals during RO purification

14. Kent Maxx 7L UV + UF Water purifier

Not all people require RO water purifiers as TDS levels might be acceptable in source water in many places. The Kent Maxx UV + UF water purifier should prove ideal under such circumstances.

  • Purification rate of 60 L/hr
  • Multi-stage purification including UV and UF
  • Detachable storage tank
  • Suitable for purifying municipal tap water
  • The storage capacity of seven litres

Municipal tap water in the metro cities is already treated with RO process. Hence, people living in such areas can invest in UV + UF water purifier to eliminate impurities, bacteria, and viruses from the source water.

The detachable water tank makes the water purifier easy to clean without involving a technician. Besides, the product has a high visual appeal because of the transparent cover.

This water purifier features a high-power 11W UV lamp to deactivate all microorganisms in the water to ensure safe and healthy drinking water.

The UF feature ensures to remove minute contaminants that could contaminate the water from municipal sources to the homes using pipes.

The computer-controlled operations are one of the shining highlights. The features include alarms for filter change and UV lamp change.

The 7L storage capacity should be ideal for small families up to three or four persons. It allows for the supply of pure water even during power cuts. The 60 L/hr purification rate ensures a constant supply of pure drinking water.

The ABS Food Grade Plastic tank is hygienic to use. It ensures to maintain the quality of purified water.

The plush-fit design prevents any leakages.

Pros
  • Ideal for purifying municipal tap water
  • Excellent purification rate
  • Detachable tank adds to the convenience.
Cons
  • Not the best water purifier where TDS levels are more than 500
  • Changing the filters annually is an expensive proposition.

If the TDS levels in your water source is below 400ppm and you are looking for more UV models, here is the list of best uv water purifiers.

Water Purifier Buying Guide

Why do you need a water purifier?

You have hit the nail right on the head by asking this question. The water that is available in our taps is not exactly the best one to drink directly.

This water contains all kinds of contaminants one can imagine. It explains why many people boil water before drinking.

Boiling kills the germs, viruses, and bacteria from the water. At the same time, it kills the taste and flavour, as well but does not remove the salts from the water.

Therefore, one can resort to using water purifiers that can deliver high-quality drinking water that surprisingly, tastes good, as well.

Now the ‘Why’ part of the question is out of the way. Let us now concentrate on what to do before purchasing your water purifier.

Test the tap water

Of course, there are two ways of testing the tap water. One is to use your natural instincts, and the other is a scientific way with the use of a TDS meter or what we refer to as a water testing kit.

The natural way is to smell and taste the water. If it smells or tastes awful, you should go ahead and read the rest of the article.

At the same time, if it smells and tastes good, what should you do? You should still go ahead and read the article thoroughly.

Water that smells and tastes good is not necessarily the healthiest to drink.

Tap water in India contains soluble and insoluble impurities. Despite the municipalities purifying groundwater, the water can pick up contaminants on its way to your home.

It has to pass through pipes and tanks. Pipelines and tanks can be corroded. They can also have a mineral build-up. Both of these factors affect the quality of water.

Secondly, groundwater can have impurities like arsenic, antimony, lead, and so on. It can also contain Totally Dissolved Solids (TDS – we will be using this term frequently throughout the article).

TDS can comprise organic and inorganic salts including calcium, magnesium, potassium, chlorides, bicarbonates, and sulphates. Thus, it is good to use a TDS meter to determine the extent of TDS.

Where can you test the water?

You do not have to go to a laboratory to conduct the test. The TDS meter is a simple tool to use. It gives reasonably accurate results that should enable you to decide the type of water purifier you should have in your home.

How do you use the TDS meter?

A digital TDS meter should not cost more than a few hundred rupees. Invest in one, as it will prove useful to you for life. Here is how you use the TDS meter.

Step 1 – Determine the temperature of water in the following way

  • Switch on the TDS meter and press the TEMP button.
  • Place the meter inside the glass of water and note down its temperature.
  • Return to the TDS mode by pressing the TEMP button again.

Step 2 – Measure the TDS level

  • Remove the protective cap of the TDS meter and turn the TDS meter on.
  • Immerse the TDS meter in the glass of water up to the maximum immersion level marked on the device.
  • If there are any bubbles in the water, stir it gently to get rid of them.
  • Wait for about 10 seconds and allow the reading to stabilise.
  • Press the HOLD option and remove the device to note down the reading.

Now, you have the reading. What should you do now? This table will give you a good idea about what the reading conveys.

TDS LevelReasons for acceptability or Non-acceptance
Less than 50Water with such a low level of TDS does not contain any essential minerals. It will be tasteless. It is not an acceptable range.
50 to 150It is an acceptable level. However, if you have an RO water purifier at home, ensure that the TDS level is not below 80
150 to 200This level is acceptable. Hospitals usually have this level of TDS in their water supply. It is ideal for maintaining cardiovascular fitness
250 to 350Most of the Indian homes have tap water in this range. It is an acceptable range
350 to 500BIS guidelines state that TDS levels up to 500 are acceptable.
500 to 900As this level is not acceptable, use an RO water purifier with TDS controller/mineraliser.
900 to 1200It is better to use an RO water purifier of good quality with TDS controller.
1200 to 2000It is a highly unacceptable range. You will need an excellent RO water purifier that can handle water with TDS levels up to 2000.
Above 2000Most of the RO water purifiers in the market cannot handle such a high level of TDS.

We shall now look at the type of water purifier you should buy depending on the TDS level in the source water.

TDS LevelWater QualityViruses/BacteriaIdeal water purifier
Below 500GoodYesUV water purifier should be sufficient
Below 500Muddy/turbidYesGo for a UV + UF water purifier
Above 500GoodYesRO + UV water purifier with TDS controller/mineraliser should be okay
Above 500Muddy/turbidYesRO + UV + UF water purifier with mineraliser/TDS controller should be ideal
Above 2000NANAUnfit for domestic consumption

You have done your homework correctly. Now, you know the TDS level as well as the water quality.

You should go ahead and purchase the ideal water purifier. Let us now discuss what these specific terms, TDS, UV, UF, RO, and so on signify. It will help you understand the basics well.

TDS – Totally Dissolved Solids

TDS can come in various forms. We shall now segregate our population into three distinct types

Rural Population Urban PopulationCoastal population

People living in villages and relying on natural sources of water

Village folk usually do not get piped water supply from municipalities. They rely on natural sources of water such as wells, borewells, rivers, and lakes.

These people use well water to cater to all requirements, domestic and agricultural.

If you venture into a village, you will find domestic animals like cows, buffaloes, goats, and dogs sharing the well water with humans. Naturally, there can be high levels of contaminants.

Secondly, industries in the vicinity of the villages dump their toxic wastes into the rivers and lakes.

The groundwater resources also get polluted due to the indiscriminate release of harmful metals like lead, arsenic, mercury, and so on. All these impurities, visible and impurities constitute TDS.

However, one should note that not all TDS is bad. The groundwater contains useful minerals like calcium, magnesium, and potassium, but the harmful TDS makes it necessary for village folk to invest in a good-quality RO water purifier and with a TDS controller.

We shall look into this aspect when we discuss RO water purification.

Those having access to piped water supply from municipalities

From the rural folk, we move towards the urban population that depends on municipal water supply. Many people have borewells in their homes.

Such people have an advantage over the rural people because the municipality undertakes the job of purification of water before distributing them to the residents through pipes (underground or over the ground).

Municipalities use RO water purification techniques to eliminate TDS and other contaminants. However, the RO-purified water collects impurities during transit from the municipal tanks to the homes.

Usually, the pipes supplying water to the residents are subject to corrosion, leaks, and rusting. Therefore, these households get water with visible impurities.

A UF and UV water purifier should be enough to purify the water, as the municipality has already taken care of RO.

Homes depending on borewells should determine the TDS levels before choosing the type of water purifier. It is always better to go for RO + UV + UF water purifier to be safe on all counts.

India has a vast coastal area with millions of people depending on salty groundwater for their consumption needs.

This water has a high level of TDS. Therefore, they should prefer the RO + UV + UV water purifier with TDS controller or mineraliser for domestic consumption.

We shall now discuss the different types of water filtering methods such as UV, UF, and RO. The concept should be clear before you decide to purchase the water purifier of your choice.

Different Types of Water Purification Systems

Gravity-based water purification systems

Old-timers will recall the simple water filter that used to be common in all households. It used to consist of two containers placed one over the other.

The top container used to have water filtering candles. One used to fill this container with the source water. The water seeps through the fine holes present in the filtering candles into the container below.

This water purification system is an example of gravity-based water purification. It is a kind of UF process. UF stands for Ultra Filtration.

The modern-day UF filters have such a membrane that can trap visible as well as ultrafine contaminants to provide water of good quality.

Such water filters are best in areas where the TDS levels are less than 500. Such water purification systems do not require any electricity for its functioning.

Ultra-Violet Chamber water purification water systems

About 30 years back, there were no RO water purifiers in India. People used to rely on the UF process for their water purification.

The turn of the twenty-first century saw the introduction of ultraviolet (UV) chambers as an effective method of water purification. UV purification is an effective method, as it can eliminate harmful viruses and bacteria.

The water passes through a UV chamber that serves its purpose by killing the germs and providing healthy water to drink.

Such water purification systems need electricity to work. Secondly, there is a disadvantage because the UV chamber can kill the germs but not destroy the bodies of the viruses and bacteria.

Of course, that should not affect your health in any way. However, it is better to pass such water through a UF membrane to remove the remnants.

Reverse Osmosis – RO water purifier

To understand Reverse Osmosis, one should be conversant with the principles of osmosis.

This requires us to go back to our school days and reopen the biology books. Osmosis is a natural process where a liquid in an area with a lower concentration tends to move towards an area of higher concentration through a semipermeable membrane.

A simple example of osmosis is when you place a potato inside a glass of water. After some time you will find the vegetable swelling up because the water from the glass seeps through inside the potato.

Source: puretecwater.com

The potato contains a high concentration of starch. The potato skin acts as a semipermeable membrane. The significance of the semipermeable membrane is that it does not allow the reverse flow of water under normal circumstances.

Reverse osmosis is reversing the process of osmosis. In this process, water moves from an area of higher concentration to that of a lower concentration through a semipermeable membrane.

RO water purifiers work on a similar procedure where the impure water with a higher TDS level passes through a semipermeable RO membrane.

The membrane has millions of small pores through which the salts cannot pass through. The water molecules are small enough to seep through thereby ensuring the elimination of TDS.

However, this process requires the application of pressure. Hence, RO water purifiers come with built-in pumps to quicken the process.

We shall now discuss the working principle of an RO water purifier.

RO Water Purifier – Working principle

The RO water purifiers available in the market employ a six-level or seven-level water filtration process.

Sediment Filter

The sediment filter is the first line of defence in an RO water purifier. Usually, the sediment filter is placed outside the RO water purifier machine.

The sediment filter works in a way similar to that of the erstwhile candle filters we had in the late 1980s. The water from the source passes through this sediment filter that takes care of the large impurities.

Hence the water loses much of its turbidity before entering the RO water purifier. It serves a dual purpose. On the one hand, it eliminates the heavy impurities and reduces the load for the RO water purification process. As a result, it enhances the life of the RO membrane.

Pre-Activated Carbon Filter
The RO water purifier system has the water passing through an activated carbon filter to remove the organic impurities. This filter also helps by removing the unpleasant taste of water.
Ultra-Filtration Stage
 

The UF is the third stage of filtration. The water now passed through the UF membrane to trap soluble contaminants.

The UF membrane consists of tiny pores that can trap microscopic pollutants. Thus, the water becomes relatively free of soluble solids after passing through the UF stage.

Reverse Osmosis Stage

The RO purification is the crucial stage in the purification process. The UF-purified water passes through the RO membrane, thereby resulting in the elimination of all TDS.

This purification process removes the toxic molecules of lead, arsenic, mercury, and other contaminants. It also ensures to remove TDS by more than 99%. Thus, you have TDS-free water emerging from the outlet.

The RO process has a disadvantage in that it wastes a lot of water while squeezing out pure water from the water source. This water flows out of the machine through a separate outlet.

Ultraviolet Purification

The RO process takes care of TDS and other metallic impurities. It also destroys some of the larger microorganisms, as well.

However, organisms having size less than the pores of the RO membrane pass through the filtration process. This RO-purified water then passes through an ultraviolet chamber that destroys the viruses and bacteria from the water.

Hence, you have pure and healthy water at the end of the fifth stage of purification.

Post-activated carbon filter

The UV process eliminates viruses and bacteria by killing them. However, it cannot dispose of the dead bodies of these viruses. Secondly, some organic impurities manage to sneak through the process.

Hence, the water passes through a Post-activated filter to remove these dead bodies and improve the taste of water by getting rid of the organic pollutants. The primary function of this filter is to destroy the bad odour from the RO purified water.

TDS Controller

As explained earlier, the RO purified water has low levels of TDS. In the process, the water loses essential salts like calcium, potassium, and magnesium, among others.

The TDS controller replenishes these salts and balances the pH level of water. We have discussed that pure water is tasteless and odourless. Hence, the TDS controller serves to balance the pH levels and make the water tasty and healthy to drink.

Mineraliser
The mineraliser performs a similar function as the TDS controller. It supplements the mineral content lost during the RO purification. The mineraliser is a better option than the TDS controller, as it replenishes the specific minerals.

Comparison between different water purification systems

We have seen the different types of water purification systems in the above paragraphs. Each of these systems has its advantages and disadvantages. This comparison will highlight the difference between these systems and clear the concept.

RO vs UV vs UF

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.

Read: RO vs UV vs UF Water purifier

Best Water Purifier – Frequently Asked Questions

1. 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.

2. 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 the 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

3. 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 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.

4. What is Mineralizer / Mineral guard

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’.

5. 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

6. 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.

7. ABS Plastic or Stainless Steel tank – Which is better?

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.

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.

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

8. 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. You get good deals at these websites.

9. 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. 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 we will be glad to answer them.