Water Purifiers

Water Purifiers

Water Purifiers

“Pure Water is the world’s first and foremost medicine”–Slovakian proverb


Water is the essence of life. Life would be non-existent without water! We are blessed to live in a Blue planet that is covered with 70% water.

With time we have realised that we cannot use all the water present on the surface of the planet. There have been multiple measures taken to purify the water present for our use.

Some of the ways of purifying water that has evolved over time are:

1. Multi-stage purifiers:- Also known as Universal Water purifiers, these use a combination of technologies to make sure that the water is clean and germ-free. The combinations may be either RO+UV filters, RO+UV+UF filters or Pre and post activated Carbon filters. The goal is simple—to rid the water completely of bacteria, germs, and other harmful pollutants. Since multiple technologies are utilized; we can benefit by utilizing the best of all these available technologies.

Benefits of Multistage purifiers :

The best of all available technologies are used and hence the water available for consumption is high-quality pure water.

Removes all kinds of impurities like dissolved salt, pesticides and heavy metals.

Eliminates germs like bacteria that cause water-borne diseases. Branded Multistage purifiers are available between a price range of Rs. 1300 upwards to Rs. 40,000.

Disadvantages of Multi-stage purifiers :

They require a continuous power supply and cannot be used during a power failure.

Higher maintenance cost involved as it uses different technologies for purification.

2. UV Purification: This purification process is an environment-friendly process that does not use any chemicals during purification. The UV water purifier consists of a UV lamp tube through which water has to pass for purification. When running water is exposed to UV light, germs like bacteria and viruses are damaged and made inactive. This is extremely efficient in eliminating their ability to reproduce.UV systems destroy 99.99% of harmful microorganisms without adding chemicals or changing the water’s taste or odour.UV water purification is usually used with other forms of filtration such as reverse osmosis systems or carbon block filters as it can only perform limited purification.

Benefits of UV Purification :

This eliminates bacteria and virus that cause water-borne diseases

There is less wastage of water during the purification process

UV filters have low maintenance costs

Branded UV filters are available between the price range of Rs. 15,000 upwards to Rs.40,500.

Disadvantages of UV Purification :

A UF purifier is not capable of removing dissolved salts & impurities like pesticides, nitrates and fluorides and heavy metals like lead and arsenic that are carcinogenic from the drinking water.

UV rays do not remain in water once water is purified. In the case of UV rays miss any microorganism while purifying, that remaining microorganisms increase their population and impure the water.

Long term effectivity will be amiss.

3. RO water Purifiers; short form for Reverse Osmosis water purifiers: This is the most widely used method to purify water. Membrane technology is used, which removes dissolved salts, bacteria and other impurities from the water. While RO technology ensures, “clean” water, it does alter the taste of water and removes some essential minerals from the water. RO water purifier requires regular maintenance.

Benefits of RO :

It is the best solution available for treating hard water

RO water purifier removes toxin such as lead, mercury, Fluoride, Arsenic, Chlorine from water; which is extremely toxic to the human body

Branded RO water purifiers are available between a price range starting Rs. 1500 upwards to Rs. 20,000.


Industrial RO plants on an average would cost about Rs. 5,00,000.

Disadvantages of RO :

Removes essential natural minerals like Iron, Magnesium, Calcium and Sodium while removing impurities

RO does not kill waterborne disease-causing bacteria and viruses.

There high probability that microorganisms can pass through RO membrane

As natural minerals are removed from the water, the taste of water gets altered as well

Requires periodic maintenance

High maintenance charges

4.UF Purification:– UF or Ultrafiltration uses technology similar to RO purifiers. Additionally, it uses membranes that remove impurities like particulate matter, pathogenic organisms, etc. A UF water purifier works by physically removing all the germs and bacteria present in drinking water. When water is fed through the UF membrane, suspended solids, bacteria and viruses sticks, get trapped and retained in the UF membrane. However, UF cannot block minute particles as effectively as RO technology can.

Benefits of UF Purification :

It is a chemical-free technology purifier & hence does not alter the taste of water

UF purifiers are not dependent on electricity; hence there is the power save

UF water purifiers are durable and affordable from a price range starting Rs. 4800 up to 15,000

Disadvantages of UF :

A UF purifier is not capable of removing dissolved salts like nitrates and fluorides and heavy metals like lead and arsenic that are carcinogenic from the drinking water.

It is only useful where the water already has low levels of TDS. ( Total dissolved salts)

5.ACT: Activated carbon filters are small pieces of carbon, in granular or block form, that have been treated to be extremely porous. To give a perspective, just 1gm of activated carbon has a surface area of about 600 to 3600 sq yards. 4 grams will be equivalent to a football field. It’s the massive surface area that allows active carbon filters to be very effective in absorbing (essentially removing) contaminants and other substances. Activated carbon filters range from around 50 microns to 0.5 microns. When the water flows through active carbon filters the chemicals stick to the carbon resulting in purer water output. The effectiveness depends on the flow and temperature of the water. Therefore most smaller active carbon filters should be used with low pressure and cold water. Activated carbon is usually made of coconut shells, wood or coal and sold as granular activated carbon or carbon blocks. ACFT is effective in removing 95% or more of Chloramine, lead, mercury and zinc with catalytic activated carbon,100% of microplastics and Cysts. They, however, do not filter out most microbiological contaminants incl cysts, coliform and bacteria, Inorganic contaminants such as arsenic and asbestos.

Benefits of ACT :

This retains all the minerals in the water; while eliminating impurities Activated charcoal can add important minerals, such as calcium, magnesium and iron back into your water to improve the water quality. They are easier and cheaper to maintain.

Branded ACT filters are available from a price range of Rs.999 upwards to Rs.4,500.

Disadvantages of ACT :

These filters are not good at removing chemicals that are not attracted to carbon like (e.g. sodium, nitrates, heavy metals, fluoride, etc.)

The effectiveness of filtration is determined by factors such as the amount of AC (activated carbon) and the time water stays in contact with the filter media.

Its effectiveness decreases if water does not stay in contact long enough with the carbon filter media.

You can switch to a simple water purification process with the low cost and portable Watamte PURO ACFT purifier jug.

For an effective Activated Carbon Filter’s and technology with activated carbon granules, Watamate Puro will be your solution.

Hello World!