Can Water Filters Remove Salt?

Water filters remove chlorine, limescale, and other contaminants, but not salt.

There are several ways to remove salt from softened water. The most common method is reverse osmosis, which filters out dissolved solids.

Short Answer

Normal water filters cannot remove the salt. Water filters cannot remove the salt. Filters remove sodium from the water. In reverse osmosis filters, a membrane removes the salt. These systems remove salt from water best. High-pressure water passes through a semi-permeable membrane to remove dissolved salts, including sodium.

Dual-stage filters remove sodium, chlorine, and heavy metals while retaining potassium and other trace minerals. 90% of sodium is removed from water by potassium chloride. Pur water filters remove the salt. These filters last two months or 40 gallons of water between replacements and are easy to install.

Reverse osmosis systems waste water and are costly. Many people cannot afford water softeners and reverse osmosis systems. It’s important to note that a water filter removes excess sodium and other impurities to provide clean, safe drinking water. Even though sodium is a component of salt, the two have very different tastes and functions.

As water filter technicians, clients often ask if water filters remove the salt. I tell them that a standard water filter cannot remove splitters removed the salt. I tell them that a standard water filter cannot remove the salt. They require a sodium-removing filter. I also tell them that reverse osmosis is the best way to neutralize salt in water, but it’s expensive. Dual-stage filters or potassium chloride cost less. The choice depends on the client’s needs and budget.


Reverse osmosis is one of the best water filtration methods for chlorine and salt removal. This process uses a semi-permeable membrane to separate two solutions with different concentrations.

Reverse osmosis systems have many parts. It has a pre-filter to remove sediment and chlorine and a post-filter to remove any remaining taste or odor.

The water enters an RO unit, where pressure forces it through a semi-permeable membrane. It’s stored in an underground tank until you need it again after passing.

In a reverse osmosis system, the ultra-fine filter membrane can capture particles as small as 0.001 microns, eliminating almost all impurities like rust, sand, and chlorinated chemicals.

Carbon activated

Activated carbon is versatile and used in many applications. It’s used in purification, adsorption, and separation.

Activated carbon filters trap contaminants on the material’s surface due to their excellent adsorption capacity. Water filters usually remove pollutants by adsorption.

When activated carbon’s millions of micropores and pockets come into contact with a substance, adsorption occurs. The carbon’s chemical structure bonds the contaminated substance to its surface.

Activated carbon is one of the best filters. It removes chlorine and other disinfectants that give tap water an unpleasant taste and smell.


Cow bones are used to make natural carbon or bone char. It’s used to refine sugar and make black pigment.

Bone char removes fluoride and other chemicals from water, including chlorine, cadmium, lead, iron, manganese, copper, nickel, aluminum, and arsenic. It also easily removes radionuclides, herbicides, and pesticides.

Point-of-use and whole-house fluoride filter systems can use bulk bone char. Depending on your family’s usage, you may only need to change the filter once or twice a year.


NSF-certified water filters are the best for removing salt from tap water. NSF International is a public health organization that certifies health and safety products.

Systems that pass NSF International’s performance and chemical safety tests are certified.

NSF/ANSI Standard 53 sets maximum contaminant levels for health-threatening contaminants. (MCLs). To determine if a system provides safe drinking water, the FDA sets these MCLs.

An NSF-certified water filter lets you drink clean, refreshing water without lead, chlorine, or other impurities. These filters also reduce sediment and particulates that could harm your health.