How to Purify Borewell Water at Home? Step By Step

If you are looking to purify borewell/hard water naturally, then you have landed at the right place. In this post, I will explain the best method to purify water without water purifier. This is the best source on the internet for this question.

Borewell water is hard water, which can be harmful for your skin and hair. Hence, purifying this hard water becomes essential before using it.

how to purify borewell water

Please note that RO purification is the best method to purify borewell water, but in case you do not have an RO water purifier available, you can use this method safely and effectively to purify hard water naturally.

Why to Purify Borewell Water?

Various impurities leach into ground water from the surface, which makes it unfit for drinking. Ground water in many areas is contaminated with toxic heavy metals such as arsenic, pesticides, nitrates, flourides, nickel, zinc, cadmium and so on.

If this is the case then you should go for RO purification because this is the only method to remove heavy metals.

However, if there are no known heavy metals present in the area then you may want to purify hard water so that it becomes soft, which is good for skin, hair, pipes, washing etc.

Let us see how we can purify borewell water with naturally available products.

Which is the best way to purify borewell water naturally?

One word answer to this question is alum or potash alum, which is also called fitkari in India. This naturally occurring salt has been used around the world as well as in India since ancient times.

Before water filters became common, this was an important method to purify all type of water including muddy water, hard water, turbid water.

In fact, in most cases, alum can purify even very dirty water in 30 minutes, which is quite good considering doing the same with the help of a water purifier can be difficult and costly because many water purifiers do not work with very dirty water.

Also, this method is perfect for reducing water hardness.

How to Purify Borewell Water

You need only two things and both are available at home easily: alum and bleaching powder.

Step 1: Add borewell water / dirty water into a bucket of around 5 litres

Step 2: Add half a teaspoon of powdered Alum in 5 litre water and stir is vigorously. (This is around 50 mg which equals 10 mg alum powder in 1 liter water)

Step 3: Wait for around 3 to 4 hours so that the sediments get coagulated and settles down at the bottom.

Step 4: Collect the top 80% using a water mug or by pouring the water from the bucket gently and leave that is leave the bottom 20% water in the bucket. Remember to be gentle and not to disturb the water too much so that you can easily take out the purified water from top of the bucket.

This water does not contain sediments and less hard now, however, it is not fit for drinking because it may contain germs. Hence the water has to be disinfected.

Step 5: To disinfect water, you have to use home bleaching powder because it contains chlorine. The prescribed dosage is around 2 drops of bleach solution for 1 liter water. Hence, you can add 10 drops into the 5 litres of water. Now stir is properly.

This water may smell little bit of chlorine. To remove this smell, you can either keep it in open air and stir it intermittently after 30 minutes or use a portable filter to purify the water to remove the smell of chlorine.

This chlorination kills around 90% percent of the bacteria in the water. If you do not want to use bleach then you can boil the water as well.

Some tips and things to remember:

Alum powder is more effective and alum stone if you want speedy purification. Alum stone can take twice the amount of time its takes to purify water as compared to alum powder.

Best time to do this procedure is in the night so that you can wait till the morning. In the morning, if there is white semi solid layer on top, remove it and take the middle portion and leave the bottom 20% of water.

If you do not stir the water after adding the alum powder, the positive aluminum ions will not come in contact with the soil particles. Thus, the particles will not be neutralized and they will not settle down. Therefore, stirring is important for effective coagulation and flocculation.

Adding different amounts of alum can result in different cleanup results based on the turbidity of water. Adding more alum can result in a better purification, however, adding too much alum can lead to a less efficient purification. If you do not have a measuring device, then you can use one tea spoon of alum to filter 5 litres of hard water.

Take care not to get your skin or cloth in contact with the bleaching solution as it is corrosive.

The prescribed dosage of alum varies from 5 mg per liter for a relatively clear water to 85 mg for very dirty water. However, the normal dosage is around 17 mg per liter.

How Alum Works?

Alum or aluminum sulphate is a coagulant which means that it attracts and binds with extremely fine and small particles to form a large particle. When a solution of alum is added to impure water, the high charge on the aluminium ion (Al+3), helps the small particles of suspended solids to group together. In short, it attracts and binds with impurities and fine suspended particles of dirt, mud etc. to form large particles.

These large particles settle down over time because of their weight.

FAQs | How to Purify Bore Water Naturally

Is borewell water bad for health?

Borewell water by itself is not bad for health. However, most borewell water in cities is polluted because of higher pollution, especially in the cities. Hence, you should get the water checked for pollutants before you start drinking without any water purification or treatment.

When not to purify borewell water naturally?

If you have access to purified water from a decent water filter, then you can avoid the use of alum and bleaching powder.

Is alum-purified water safe to drink?

Alum purified water is good for drinking if you have removed the germs with the help of bleaching powder.

Can alum be used in purification of river water?

Yes, alum can purify river water and even very dirty water effectively.

What are the negative effects of alum?

The use of alum usually decreases the pH of water, which makes it slightly acidic. You can add lime to increase its pH

Can alum be used to purify water from well?

When alum added into a well it produces H2S gas which is toxic. Hence, this water needs more treatment through conventional water purifiers to remove any trace of H2S and H2SO4.

How to purify water naturally without alum and bleach?

If you have earthen pot, then store the water in this pot for two days. The impurities will deposit at the bottom which can be removed. After this, you can boil this water and drink it.


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