The rainy season has arrived. It is very difficult to get clean water to drink in it. Sometimes, even the supply water starts getting dirty. In many places even clear water is harmful. In such a situation, we usually make a plan to buy a water purifier to drink clean water. Rajesh Bharti talks about when and which water purifier to buy from Rakesh Malhotra, Founder of Livpure and Ashutosh Verma, Founder of Exalta
clean water criteria
It is not right to install a water purifier just in sight. Before installing a water purifier, make sure to test the water coming to your home. For how clean the water coming home is, it must meet these criteria:
1. Absence of bacteria
Clean water should not contain any kind of bacteria. These bacteria make a person sick. Sometimes the reason for the pain in the stomach can also be harmful bacteria that come with the water. It is not necessary that bacteria are present only in dirty water. Even clear water can contain bacteria. They are so small that they cannot be seen without a microscope.
find out like this
For the detection of bacteria in the water, the water has to be sent to the lab. Information about the lab can be obtained from the water department or municipal corporation of your area.
– Help can also be taken by calling on the phone numbers given on some websites like itslab.in, sigmatest.org, nabl-india.org etc.
2. Lower TDS
The full form of TDS is Total Dissolved Solids. It means the amount of solids (minerals) present in water. If the amount of TDS in the water of a place is 400 ppm (parts per million) or less, then it is considered as clean water. If the amount of TDS is more than 400 ppm, then drinking that water should be avoided. It contains heavy minerals like sodium, potassium etc. It has been seen in many places that the amount of water TDS is 1000 or more. This water is very salty and such water should not be drunk.
Check TDS like this
A device like a digital thermometer comes to check TDS in water. The amount of TDS is displayed on the display in the device.
This device can also be bought online. Its cost is around Rs 200.
3. Getting the pH Scale Correct
The pH scale of the water should also be correct. The pH scale shows how much acid and alkali are dissolved in water. Along with this, it also shows how much active hydrogen is in the water. The pH scale ranges from 0 to 14. A pH less than 7 means that the water is acidic and if the pH of the water is greater than 7 then the water is alkaline. The pH of water being 7 means that there are no acids and bases in the water, that is, water is neutral. Therefore, if the pH scale of a water is 7, then that water is considered clean according to the pH scale. According to experts, if the pH scale of the water of a place is between 6.5 to 7.5, then that water is potable.
How to check pH scale
To check the pH scale of water, the same device comes as TDS checking. The device has a display on which the pH value comes.
This device can also be bought online. Its cost is around Rs 700.
4. Getting the ORP Right
Here ORP stands for Oxidation Reduction Potential. Think of it in such a way that there are many such ions in water which are harmful for our body. These ions can be of any substance like sodium, magnesium or calcium etc. When these ions are in excess in water, the amount of oxygen in that water is very less. In such a situation, that water becomes harmful for the body. ORP is measured in millivolts (mV). The amount of ORP in any water can range from negative 1500 (-1500) mV to plus 1500 (+1500) mV. The more negative the ORP value, the more clean the water is considered. According to a standard, the ORP of the water of a place is -400 mV, then according to the ORP, that water is clean. On the other hand, if the ORP of water is +400, then that water is not potable.
Check ORP like this
To check the ORP value of water, the same device comes as TDS checking. The device has a display on which the ORP value comes.
You can also buy this device online. The price is around Rs 3000.
There are three types of techniques to clean water at home
1. RO (Reverse Osmosis)
RO eliminates impurities, particles and metals dissolved in water. If the water coming into your house has high TDS or the water is saline (from borewell), then only water purifier with RO technology should be used. If government water comes, don’t get RO installed.
– Impurities like chlorine and arsenic present in the water are removed.
Water remains free from bacteria and viruses.
– Working at higher tap water pressure than normal.
– Electricity needed at all times. On an average 30-70% water is wasted.
Note: Now such ROs are coming in the market, so 70% of the water is cleaned and only 30% of the water is wasted. These are called high recovery ROs. This is a better model from an environmental point of view.
2. UV (Ultraviolet)
Ultraviolet technology is used in this type of water purifier. This technique eliminates bacteria and viruses present in the water. It does not remove dissolved minerals like chlorine and arsenic and other impurities in the water. If water from Jal Nigam comes in the house, then only get a water purifier with UV technology.
It kills all types of bacteria and viruses.
– It can work under normal tap water pressure
For this also electricity is needed all the time.
– Does not remove bacteria and viruses from water, but kills.
3. UF (Ultra Filtration)
This is a physical technique to purify water. It is also called gravity technique. It consists of a membrane or layer. This cleans all the impurities dissolved in the water. At the same time, it kills all types of bacteria and viruses present in the water and removes them from the water. However, it does not filter out all the minerals and salts in the water.
– It does not require electricity.
– Can work under normal tap water pressure.
Where the borewell water cannot be cleaned.
If the amount of chlorine and arsenic in the water is high, then it is of no use.
Now know, how important is water purifier
Now the question is, is it necessary to buy a water purifier? After getting the water tested at your home, if you find that the water does not contain too many harmful bacteria, its TDS, pH scale and ORP values are correct, then there is no need to install a water purifier. On the other hand, if the water is coming clean at one or more levels, then buy a water purifier to remove the same thing. This will not only keep the pocket from getting too light but the quality of the water will also be better.
which water purifier to buy
If you live in metro city…
Pollution level is very high in metro cities (metropolitan cities like Delhi, Mumbai). It also affects the supply water. Along with this, many times it comes to the fore that the supply water pipe also breaks, due to which the dirty water starts coming. Therefore, people living in metro cities should take a water purifier that has all three technologies RO, UV and UF.
Company: KENT, Blue Star, Livpure, Aquagrand, Exalta etc.
Price: Starting from Rs.6 thousand
If you live in a non-metro city…
The pollution level is less in non-metro cities. However, most of the water there comes from borewells. In such a situation, there is a possibility that the amount of TDS in water is very high. Therefore, buy a water purifier that reduces the TDS of water. For this, only a water purifier with RO technology is enough.
Company: Aqua Fresh, Exalta, LG, Blue Star etc.
Price: Starting from Rs.8,000
If you live in hilly areas…
The water in the hilly areas is sweet. In such a situation, the amount of TDS in it is less. However, it may contain bacteria or viruses. Therefore, a water purifier with UV or UF technology would be better for people living in hilly areas.
Company: Blue Star, Livpure, Hindware, HAVELLS etc.
Price: Starting from 5 thousand
Note: Before choosing any type of water purifier, make sure to test the water. Price changes possible.
keep these things in mind
If you are buying a water purifier that runs on electricity, then always buy a water purifier whose tank is bigger i.e. it has more water carrying capacity. Actually, there are many places where power cuts keep happening. In such a situation, even if the power is cut for a long time, then you will not have to worry about water. In such a situation, it would be better to buy a water purifier with a tank of 10 or more liters.
A lot of water gets wasted with RO water purifier. Only 3 or 4 liters of clean water comes out of 10 liters of water and the water gets wasted. In such a situation, this waste water can be used for washing the house or car. Do not pour this water into plants, as it contains a lot of salts which can spoil the roots of plants.
Always buy an RO that comes with a filter replacement indicator. With this, you will be able to change the filter of the water purifier at the right time and keep drinking clean water.
If you are taking filter water somewhere, it is better to take it in a non-transparent (opaque) bottle. When the light in a transparent bottle goes on, the bacteria present in the water start growing, due to which the water becomes impure again.