Do Water Filters Remove Calcium (How Do They?)

The question that is so often asked: Do water filters remove calcium?.

That is also valid for our drinking water and any other water supplied to the household from the grid.

That is because people want to make sure they and their loved ones get safe water to drink.

Tap water is, in most cases, the only water source for many people out there, and they need to know the truth.

Investigate with us to find out whether the safest option is cooking water or can filters to get rid of calcium.

Do Water Filters Remove The Calcium?

Water filters such as carbon water filters will remove some of the calcium but not all of it.

These carbon filters will remove chlorine and other organic chemicals from the water and, at the same time, improve the water taste.

A highly effective filter for removing calcium from the water is an ion exchange filter that removes the hardness of the water.

Homeowners can add a whole house water filtration system into the mainline to treat all water coming into the house.

Waterdrop whole house water filtration systems are among the more popular brands used to treat mainline water.

The three-stage iron filter whole house system works more effectively than a single faucet filter to treat the water supply to your home.

There might be a drop of pressure in water flow in your home when you install a whole house water filtration system.

There are many different water treatment systems available that can help remove minerals from your drinking water.

Types Of Water Treatment Systems To Remove Calcium

While calcium is good for you in small measures, it is not that healthy for the appliances we use in our homes.

The following is a list of a few methods you can use to remove the calcium from the water in your home water supply.


This filter type is very effective and will remove up to 99 percent of contaminants from the water, such as viruses and bacteria.

It will also remove heavy metals and is the best way to purify the water in your home.

Combining this method with automatic boiling will provide you with the purest and softest water for bath and washing clothes.

The filter’s porous membranes will help remove hard minerals such as magnesium and calcium, making the water much softer.

This filter system is high maintenance and the multi-filter system requires regular replacement of the filters to keep the water soft.

Depending on the size of your household and the hardness of the water, you should replace the membrane every two to three years.

Ion Exchange

This is also a type of reverse osmosis system that helps to purify the water from a variety of water contaminants.

This works by using a calcium water filter with ion exchange resins to remove the calcium and other minerals from the water.

Activated carbon can also be used if you do not want to remove the calcium from the water but only odors and pollutants.

An ion exchange system will provide you with much higher efficiency than R.O. systems with lower power consumption.

Other Water Softener

This water softener uses a tank of salt or salt water to remove the hard minerals from the water.

The water runs through this tank, and the salt will bond with the hard minerals and form a salt cake that you can then dispose of.

After the minerals are removed from the water, the soft water is allowed to fill your home’s pipes.

A glass of clean water and filter cartridges removing calcium on the home kitchen

Where Does The Calcium In Water Come From?

The source of calcium in the water can be from calcium salts present in the soil from where your water comes from.

This is a natural phenomenon and increases the water hardness, which is not that healthy for humans to drink.

To have soft water in your home for drinking purposes, you can use a water softener.

The water supplier uses conventional water softeners to treat the water before getting to your home.

But that may not be enough, so you need to add your water treatment system to your water supply for soft water.

Is Calcium Bad For You?

Water treatment systems that remove all calcium from the water supply are not encouraged by the World Health Organization.

Calcium adds a little bit of taste to the water and counters the chlorine taste in some water.

Calcium will also help remove the bad taste from most types of water which is why it is not good to have calcium-free water.

Low mineral content in water may also cause the water not to quench your thirst that effectively.

To increase minerals in the water, calcium carbonate and sodium chloride are added to the water supplied to our homes.

Too low mineral levels in the water you drink may be a risk for many different diseases like hypertension.

A high calcium level in the water might be good for you if you do not have enough in your daily diet.

On the other hand, too much calcium in water can cause other problems such as kidney stones and gallstones.

To have the best water quality, your water should not have more than 5mmo/L. More than that can be unhealthy for you.

Too much calcium in the water supply will increase the hardness of the water, which may cause other types of problems.

One such problem is that if your bath water is too hard, the soap may be not lather that well.

The same problem can arise when you do your washing as the chemical reaction of the detergents will not be that good.

calcium crust in water filter


As you can see, most of these water filters will remove the calcium from the water in your home.

You want a system that does not remove all the calcium but leaves some of it in your drinking water.

You can add a filter to make the water even softer at the faucets where you do the washing. For those who need softer water to bathe, you can also focus on those taps.

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