How to Remove Salt from Saltwater: The Best Ways to Purify and Reuse Your Saltwater

Salt is a mineral that exists in a lot of water sources, including seawater. It is an excellent source of minerals and trace elements, but it can also harbor salt.

Unfortunately, it's also one of the most corrosive substances on earth. These salts will impact marine life and cause water quality problems. It is important to remove these salts before using the water for other purposes. Luckily, there are a few ways to get rid of salt from saltwater.

Salinity in freshwater can be regulated using seawater desalination. This is why it is used to provide potable water for developing countries. However, this process consumes a large amount of energy and threatens marine life and fisheries. Here's how to remove salt from seawater.

Table of Contents

Table of Contents

How to Remove Salt from Saltwater

There are various methods that you can use to remove salt from your water. One of the most common methods is to boil the water. Another technique is to filter the water with a combination of sand and gravel. If you do not want to add salt, it is best to use distilled or reverse osmosis (RO) water. The last option is to use a deionizer machine.

Guide: How to  Use Deionizer Machine

Boiling water

The first method is boiling the water. Boiling is a simple way to remove salt from water. All you need is a pan and some hot water. You should have enough room for the water to expand as it boils. To start, fill up the pan about half full. Then put the pan over medium heat. After about 10 minutes, the water will begin to bubble. Or you can also boil water using microwave.

Once it does, turn off the heat and let the water cool down. When the water cooled down, pour the water and place the pan back on the stove. Fill up the pan again with fresh water. Repeat this process until all the salt has been removed.

Sand and Gravel Filter

Another method is filtering the water through a combination of sand and rock. Before you begin:

  1. Make sure that your sand and gravel are clean.
  2. Wash them thoroughly with soap and warm water.
  3. Make sure that they are dry before adding them to your container.
  4. Mix equal parts of each material.
  5. Add the mixture to a bucket or barrel.
  6. Pour the water into the container.
  7. Let the water sit overnight.
  8. In the morning, take the sand and gravel out of the container.
  9. Put them in a separate container.
  10. Rinse the container and repeat the process.
  11. Continue doing this until all the salt has evaporated.

Distilled/Reverse Osmosis Water

If you don't want to add any salt to your water, you can use distilled or RO water. Distilled water comes directly from a spring or well. Reverse osmosis water is produced by passing water through a membrane that filters out contaminants. The result is pure water.

To produce RO water, you will need to buy a RO system. There are two types of systems: those that need electricity and those that run on solar power. If you choose to go with the latter, you will need to buy batteries. The advantage of this type of system is that it produces very little waste.


A deionizer works by removing ions from the water. Ions are electrically charged particles that exist in all matter. They are essential because they help maintain electrical neutrality. Deionizing machines work by passing the water through a column filled with negatively charged resin beads.

As the water passes through the columns, the ions attach themselves to the resin. The resin is then placed in another container where the water is collected. The resin beads are cleaned and reused.

It is possible to build your deionizer. However, if you decide to do so, you will need to spend a considerable amount of money. A better alternative is to buy a pre-built unit.

Osmosis - Removing Salt From Water

The osmotic pressure is a force that pushes molecules together or apart. Here, we are trying to push ions away from each other. The process of removing salt from water uses this principle.

Osmosis is a natural phenomenon where water moves through a semipermeable membrane. When you apply a difference in concentration between two sides of the membrane, water flows through.

To use osmosis to remove salt from water, we need to put our saltwater into a container with a semipermeable membrane. Then, we add fresh water to the opposite side of the membrane.

Freshwater has less salt than saltwater, so that it will flow through the membrane. As the water passes through the membrane, it removes some salt from the saltwater. Eventually, all the saltwater becomes pure water.

This method works best when the concentration of salt in the saltwater is high. If you have low concentrations of salt, then the saltwater may not move as much. Also, if you don't have enough fresh water available, the amount of salt removed may not be sufficient.

Membrane Distillation - Removing Salt From Seawater

Water passes through a porous membrane while solids and bacteria aren't allowed to pass through it. The pores in the membrane allow the water to pass through, but they prevent the salt from passing through.

The salt stays behind in the tank. Freshwater is added to the top of the tank, which causes the salt to dissolve in the freshwater. The salty water rises to the top of the membrane. The clean water comes down below the membrane.

There are several advantages to using a membrane distillation system:

  1. It doesn't need any electricity.
  2. It's easy to maintain because it does not require cleaning.
  3. It produces very little waste.
  4. It is effective at removing salt from large volumes of water.
  5. It is a cost-effective option for small-scale applications.

Electrolysis - Removing Salt From Sea Water

An electrolytic cell is like a battery. It contains electrodes and an electrolyte solution. An electric current runs through the electrolyte solution, causing chemical reactions to take place.

In this case, the electrolyte solution would contain saltwater and freshwater. A negative electrode would be placed in the saltwater, and a positive electrode would be placed in freshwater. The current would run through the salt water, causing the salt to separate in sodium chloride.

The advantage of using an electrolytic cell is that it requires no energy input. However, it is only useful for small quantities of salt. For larger amounts, you'll need to use another method.

The Science Behind How to Remove Salt From Water

Aqueous solutions interact with dissolving and precipitating substances to dissolve the salt.

Here, we will explore how you can remove salt from water using various methods.

Salt is a major source of contaminants in treated drinking water. If left unchecked, it would eventually find its way into the distribution system and increase dissolved solids levels. Dissolved solids include things like calcium, magnesium, sulfate, and chlorides. They can lead to corrosion in pipes and damage to plumbing fixtures.

If you want to keep your drinking water safe, you should reduce the amount of salt in it. You can do this by filtering or treating the water. But if you want to get rid of the salt completely, you can use reverse osmosis. RO uses pressure to force water through a semipermeable membrane. This membrane prevents all ions except those with a low molecular weight from passing through.

Salt in Your Food Every Day Is a Risk to Your Health

Salt consumption can cause health problems, including high blood pressure, heart disease, and kidney failure. A new study suggests that the salt content in packaged food is up to twice as high as what's on the label.

The study found that many canned soups, spaghetti sauces, and biscuits have twice as much sodium as they claim. Every day, Americans consume more than double the recommended sodium intake.

In addition, even if consumers only consume the recommended amount of sodium per day, they consume half their daily allowance in just one meal.

Many people think it's okay to eat too much salt because it's in many foods like bread and vegetables. But this is untrue because it causes serious health issues.

You might not realize it, but your body needs salt to function properly. Without enough salt, your muscles won't contract properly, and your brain won't work correctly. In addition, your kidneys have trouble removing excess salt from your bloodstream.

So, if you're trying to lose weight, avoid processed foods that have added salt. Instead, eat fresh fruits and veggies that don't add any extra salt.

What is the Problem with Salt in Sea Water?

The problem with salt in seawater is not only the amount of sodium but also the salt concentration. On average, the salt concentration has risen to 80%.

Salt levels are too high in seawater. This means that there is more salt than water. It also means that there is more pollution and less oxygen for humans to breathe as well! When this happens, marine life can die because there is not enough oxygen in the water to breathe.

Too much salt has caused too much pollution, and it has impacted human health as well. The World Health Organization recommends an intake limit of 2,300 milligrams per day. That's about 10% of your daily recommended value!

How to filter salt substances from my bathing water

There are two methods for filtering salt from your bathing water. One uses a sand filter, and the other uses a carbon filter. Both of them work well, but they have their limitations.

Sand Filter

This type of filter works best when the concentration of salt in the water is low. It consists of a container filled with sand. The sand absorbs the salt as the water passes through it. After some time, the sand becomes saturated with salt. Then, the water must be changed if the salt concentration is higher than normal, then the sand will become clogged. That makes the filter ineffective.

Carbon Filters

These filters are more efficient than sand filters. Carbon filters consist of granules made from activated charcoal. During the water flow through the filter, the salt sticks to the charcoal particles. When the water leaves the filter, the salt remains behind.

How can one remove salt from well water?

Well water often contains high levels of salt. To remove this salt, you'll need to use reverse osmosis. RO uses pressure to push water through membranes. The membrane filters out molecules too big to pass through. This leaves behind pure water.

A semipermeable membrane is forced through water during reverse osmosis. The membrane keeps the bigger molecules inside while letting the smaller ones pass through.

This process removes salt from the water. However, it doesn't remove everything. For example, some minerals remain. And, the process can leave behind a small amount of waste called concentrate.

How can we separate salt from water using evaporative cooling?

Evaporative cooling is a method used to remove salt from water. It involves heating water until it boils. At this point, steam begins to condense. As the steam condenses, it turns back into liquid water. This causes the temperature of the water to drop.

As the temperature drops, the vapor becomes less dense. That makes it easier to move upward. As a result, the water rises to the surface. You can then collect the water in a bucket.

If you want to use evaporative cooling to remove salt, you'll need a container that has a lid. It needs to have holes to let air flow through the container. You also need to place the container outside.

Once the water starts to condense, you'll know when your evaporation is complete. When you've collected enough water, you can start filtering it.

Using evaporative cooling to remove salts requires a lot of energy. Because of this, you won't find many people doing this at home. Instead, they're more likely to rely on reverse osmosis.

How can one remove salt from water for plant cultivation?

You have two options for removing salt from salt water. One method involves letting the water sit in a closed container for several days. Another option is to pass the water through activated carbon filters. Both methods work well. However, they require patience.

Activated carbon filters have been around for decades. They were originally designed for removing impurities from gasoline. Activated charcoal acts like a sponge. It absorbs contaminants while allowing clean air to flow through.

However, this doesn't mean it works perfectly. There are some drawbacks to using activated carbon filters. For example, it requires regular maintenance. You'll need to replace the material every few months.

Another drawback is that the filters tend to clog up over time. To combat this problem, you can add a small amount of bleach to the water. Bleach helps keep the carbon fresh.

If you're looking for a more permanent solution, you can install a reverse osmosis system. Reverse osmosis systems work like dialysis machines. They use pressure to separate dissolved solids from water.

Reverse osmosis systems are usually installed in homes. They cost thousands of dollars, though. And, they don't always produce high-quality water. That said, they do come with their own set of benefits. For example, they are relatively easy to maintain. They also produce water that is safe to drink.

How to Remove Salt From a Dish at Home without a Recipe

Salt can be removed easily in a dish without using a recipe. The dish will still taste great because of the flavors that are already present in the dish.

The process is quite simple, but it does take time. When making a soup, it is best to get rid of all the salt before adding any other ingredients.

Salt will always make food taste better, but you might want to make it less salty for health reasons or for people who don't like salt on their food.

How to Remove Salt from Saltwater for Cooking

In this recipe, you'll learn how to remove the salt from saltwater so that you can use it for cooking purposes.

Saltwater is often used as a cooking medium for dishes such as fish, seafood, and vegetables. However, if these ingredients are not cooked in water with no salt, they can be too salty.

To make the process of removing the salt simpler and easier for you, here are some tips on how to do it:

  • Turn off your stove before adding any salt to the water;
  • After boiling off all the water's liquid part (preferably using a pot with a lid), let the pot cool down;
  • Once cooled down, pour out all the liquid part (there will now only matter left);
  • Let the mixture stand overnight;
  • In the morning, strain the mixture using a strainer;
  • Rinse the strainer with hot water;
  • Repeat the above steps until all the salt has been removed.

Tips & Tricks:

  1. Be sure to turn off your stove before adding salt to the water. Otherwise, you may end up burning yourself.
  2. Boiling off all the liquid parts of the water is essential. Without doing so, you won't be able to remove the salt.
  3. Make sure to let the pot cool down after boiling off all of the liquid. Otherwise, you risk getting burned by the heat.
  4. Pour out all the liquid parts into another container. Don't just throw them away. Use them later for something else.
  5. Let the mixture sit overnight. Doing so will help the salt dissolve faster.
  6. Strain the mixture using a straining device. You can use a cheesecloth or even a clean cloth.
  7. Rinse the strainer well with hot water.
  8. Repeat the above steps until you've successfully removed all the salt from the mixture.
  9. Store the remaining saltwater in a bottle or jar.
  10. Enjoy!

10 Tips on How To Remove Salt From Water & Preserve Your Home Brews

In conclusion, we have provided 10 tips on removing the salt from the water and preserving your home brews. We hope that these tips can help you in your next brewing project.

First of all, you need to evaluate the recipe for what it will be used for – beer or a drink – before deciding on a type of water. The different types of water will change the process.

Second, the best way to remove salt from water is by using a cold water bath with a natural mineral balance. You can also try boiling with ice or using distilled water or reverse osmosis filters before adding them back in.

Third, if you want to remove the salt from water without adding anything else to it, you should use a reverse osmosis filtration system.

Fourth, if you are looking for a cheap and easy way to remove salt from the water, you can use a salt block.

Fifth, if you are concerned about the taste of the water after removing the salt, you can use a carbonated water bottle.

Sixth, if you want to make sure that you only use clean water, you should use bottled water.

Seventh, if you want to save money, then you should consider buying a reverse osmosis machine.

Eight, if you want the highest quality water possible, you'll need a reverse osmosis system that can produce up to 200 gallons of water per day.

Ninth, to avoid making mistakes in the brewing process, always make sure that the water temperature is right before you start.

Lastly, if you want to keep your home brews safe from contamination, you should store them properly.

Turning Seawater into Fresh Water for Coastal Survival

Turning Seawater into Fresh Water for Coastal Survival

Locate your life raft and some other debris. It’s possible to use elements of your daily life raft to build a method for making fresh water from seawater.

  • This system is the most useful if you’re stranded on a beach without new water.
  • It was developed from the flying pilot through WWII in the Pacific.
  • This is a beneficial method, mainly if you don’t know how much time it’s going to be till it’s possible to be rescued.
  • Locate the gas jar out of your daily life raft. Open it and fill it with sea water.
  • A filter that the seawater using fabric so that you don’t get a lot of sand or debris from the water.
  • Do not fill up the bottle too much. You are going to want to prevent spilling the water from the surface of the container.
  • Carries back the water to an area where you can earn a fire.

Locate the hose and flow stoppers in the life raft. Attach the hose to one end of this flow stoppers

  • This will offer a tube to get new condensed water vapor to venture from this jar of seawater as it’s heated.
  • Make sure that the hose has no kinks or clogs.
  • Notice the seal between the nozzle and flow stoppers is powerful. This can help you avoid any new water leaking from the hose.

Plug up the top of the gas bottle with the leak stoppers. Use the opposite end of the leak stoppers from where you’ve attached the hose.

  • This will offer a means for water vapor to maneuver by the jar as it’s headed to the tube to transfer fresh water.
  • Make sure that the seal is tight enough to prevent escapes.
  • If you’ve any twine or tape, then you can fortify the seal together with these products.
  • Construct a bank of sand and then bury the hose. This is going to keep the tube steady since clean water travels.
  • Maintain the end of the tube vulnerable. This is where new water will trickle out.
  • Do not irritate the gas jar or flow stoppers. You’ll have to get this vulnerable to maintain the watch to be sure that there are not any leaks.
  • Make sure that the hose is comparatively directly and free of kinks because you irritate it.

Put a pan beneath the exposed end of this hose. This may accumulate water from the new pool.

What makes water saline?

What makes water saline

What do you know about saline water? The answer is that the saline water contains a lot of dissolved salts. In such case, the attention is the amount of salt in water since stated in parts per million. As water has absorption of 10,000 ppm of mixed salts, 1% of the heaviness of water comes from dissolved salts.

Under we have parameters for the saline water

  • Slightly saline water – From 1,000 ppm to 3,000 ppm
  • Moderately saline water – From 3,000 ppm to 10,000 ppm
  • Fresh water – Less than 1,000 ppm
  • Highly saline water – From 10,000 ppm to 35,000 ppm
  • By the way, ocean water contains about 35,000 ppm of salt.

Statistics for Salt Water

  • One percent of the weight of water contains 10,000 parts per million dissolved salts.
  • About 30% of the world's irrigated land is affected by salinity, and remediation costs are high.
  • Eighteen thousand four hundred twenty-six desalination plants supply 300 million people with water daily across five continents. 
  • Compared to 2013, the number of cubic meters produced increased by 10.71%. 
  • Remember that the oceans make up about 97% of all the water on, inside, and above the Earth.
  • Saline water accounts for more than 13 percent of all water used in the U.S.
  • Approximately 5 percent of all industrial water used is saline water, and 53 percent of all mining water is saline water. 
  • Reverse osmosis is currently the most widely used "gold standard" process for removing salt.
  • It claims that the bottle eliminates 99.9% of pathogens in water, but this bottle doesn't seem to comply with the company's claims. 
  • Up to 90% of the sodium present in water can be removed by adding potassium chloride.

How Seawater Desalination Works

Frequently Asked Questions (FAQs) about Removing Salt from Saltwater

1. Can you boil salt water to make it drinkable?

Yes, if the water is not too salty. You can also add a little bit of sugar or honey to sweeten it up.

2. How do we turn salty water into fresh drinking water?

The technology is not yet advanced enough to make desalination plants cost-effective in most applications. Water can only be made from seawater by reverse osmosis, which is energy-intensive. And that means it's not practical for many regions with high electricity costs.

You should read: How to make saltwater drinkable?

3. Can you remove dissolved salt from the water?

No. Dissolved salt cannot be removed from the water. All you can do is reduce the amount of salt in the water. That's what desalination plants do. They remove the salt from the water and replace it with fresh water.

4. What happens if I don’t remove salt from my swimming pool?

Your pool will eventually fill with salt. If you leave it untreated, algae will grow in the pool. Finally, the algae will die off, leaving the pool covered with dead algae. Once that happens, the chlorine in the pool will break down the dead algae, releasing toxic chemicals into the air. Those chemicals may be harmful to people who breathe them in.

5. Is it safe to swim in saltwater?

Swimming in saltwater isn't dangerous. But it does carry health risks. Some bacteria thrive in saltwater, such as Vibrio cholera. People who come in contact with contaminated water can develop diarrhea. Also, the skin of swimmers can dry out quickly because salt evaporates very easily. So, it's better to avoid getting wet feet. 

6. Is there a cheaper way to remove salt from seawater other than desalination?

Yes. There are several options available. For example, you could use a reverse osmosis system to purify the water. Or, you could install a solar still. A solar still collects sunlight and converts it to steam. The steam turns turbines that generate power. In this case, the heat generated by the sun would evaporate the salt from the sea.

7. Can saltwater be filtered through cloth to drink?

No. Water passing through a piece of fabric will pick up any impurities present in the water. However, the water will remain cloudy. To clarify the water, you need to pass it through another layer of cloth.

8. Why is salt so bad for us?

Salt is essential to our bodies. Our cells require sodium chloride to function properly. Without salt, our muscles wouldn't contract, our hearts wouldn't beat, and our brains wouldn't process information. Salt helps regulate body temperature. It also helps keep fluids inside and outside your body balanced.

But too much salt can be as bad for us as too little. Too much salt causes fluid retention and swelling in the legs and ankles. It also makes the blood thicker, increasing the risk of heart attack and stroke. High levels of salt in the bloodstream can lead to kidney damage, liver failure, and even death.

9. So how do we know when we have too much salt?

Most doctors recommend keeping your daily intake below 2 grams per day. Anything above that level should be considered a medical emergency. Keep in mind that some foods naturally contain more salt than others. For instance, salted butter contains about 3 times as much salt as unsalted butter.

Also, check the label on food packaging. Salt is common in processed foods. And, remember that many restaurants add extra salt to their dishes.

Those concerned about their salt intake should try cutting back on salty snacks like potato chips and pretzels. You might find that you enjoy healthier alternatives like fruits or vegetables instead.

10. Why can’t we filter saltwater?

Saltwater has a high concentration of dissolved solids, which means it's full of solid particles. When you put something in a container, it tends to sink to the bottom. That's because the particles don't want to stay together. They prefer to separate themselves from each other. That's why saltwater sinks.

When you filter saltwater, you force the particles to stick together. As a result, they form a thick sludge at the bottom of the tank. If you try to pour the sludge off, it'll only make things worse. Instead, you need to let the tank settle for 24 hours. Then, you can skim off the top of the liquid.

11. Can I drink seawater after I boil it?

No! Boiling water destroys all its nutrients. So, if you plan to consume the water, you must first treat it with chemicals. Chemicals such as chlorine and iodine help prevent bacteria and viruses from growing in the water.

You should also avoid drinking saltwater directly. Doing so can increase the risk of dehydration. Also, you may experience diarrhea and stomach cramps.

12. How to get rid of salt from drinking water

The best way to get rid of salt is by boiling the water. The heat breaks down the salt into harmless compounds. The U.S. Environmental Protection Agency recommends boiling water for 10 minutes to kill harmful germs.

To boil water, fill a large pot with cold tap water. Once the water reaches a rolling boil, reduce the heat to medium-low. Allow the water to simmer for 10 minutes. Afterward, turn off the heat and allow the water to cool completely.

13. What is the time it takes to get rid of salt?

It depends on where you live. Some areas are located near oceans, lakes, rivers, or underground aquifers. Others are far away from any natural bodies of water.

In either case, it takes time to get rid of salt. Depending on the amount of salt in the water, it could take several days to several weeks. But, it's not impossible.

14. Is there an easier way to purify saltwater? 

Yes. There are many different methods available. One method involves filtering out the salt through a cloth. Another option uses activated charcoal. Yet another method consists in adding baking soda to the water. All three of these options work well. However, none of them are quick.

15. What happens when I use a saltwater filter?

Filters remove impurities from the water. But, they do nothing to remove the salt. To solve this problem, you need to buy a reverse osmosis system. A reverse osmosis unit removes both salt and contaminants from the water. 

16. Do you need an advanced degree to remove salt from water?

Not necessarily. You need to know how to install and operate a reverse osmosis unit. Fortunately, you don't have to be a professional engineer to do this job.

17. What Should You Avoid if You Want to Remove Salt from your Drinking Water?

Salt, as we know, is present in drinking water and can be harmful if ingested in high amounts. You must remove salt from your drinking water to ensure that it's safe for consumption.

Some people use a salt shaker to measure out their daily intake of salt and then remove it from the drinking water. If you're looking for a more permanent solution, there are many ways to remove salt from your drinking water.

Before deciding on an option, it's important to know what type of solution you need and how often you need it.


You may have noticed many different ways to remove salt from water, depending on what kind of water you have. Some methods are more effective than others. Each method has its advantages and disadvantages. The best thing to do is try out several methods and see which ones work best for you.


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