Quick summary: A water softener removes calcium and magnesium that make water hard. Benefits can include reduced scale buildup, easier cleaning, better soap and shampoo lather, protection for water-using appliances and softer-feeling laundry.
Hard water affects everything from showers and laundry to appliances and fixtures. A water softener helps address those everyday challenges by removing the minerals that cause hardness, which often leads to damaging buildup throughout your home. The biggest benefits of soft water include:
- Softer-feeling skin and more manageable hair
- Easier household cleaning
- Protecting water-using appliances
- Potential cost and efficiency benefits
- Cleaner, brighter laundry
Here’s a closer look at how installing a soft water system can support comfort, home protection and everyday convenience.
What does a water softener do?
To understand what a water softener does, it helps to start with the specific issue it is designed to solve: hard water.
The U.S. Geological Survey explains that water hardness relates to dissolved calcium and magnesium. A water softener removes these minerals through a process called ion exchange. It is not a water filtration system, but rather a different type of water treatment that specifically addresses the many everyday concerns associated with hard water.
Signs you may have hard water
Many homeowners don’t realize their water is hard until they begin noticing scale and cleaning challenges throughout the home. Common signs of hard water include:
- White scale buildup on faucets and fixtures
- Spotty dishes and glassware
- Soap scum on showers and tubs
- Soap and shampoo that don’t lather easily
- Laundry that feels stiff after washing
- Frequent appliance descaling needs
- Reduced water flow caused by scale buildup
The best way to determine whether you have hard water is through a professional water test that measures hardness levels and identifies other potential water-quality concerns.
Benefits of a water softener
Soft water brings many advantages, with these among the most impactful for you and your home.
1. Improved hair and skin
The dissolved minerals in hard water can react with soap and leave behind a residue on hair and skin. This may leave skin feeling dry or tight, and it can make hair feel dull, coated or more difficult to manage.
While hard water does not cause eczema, psoriasis or other medical skin conditions, the buildup it leaves behind can exacerbate these conditions by irritating sensitive skin.
Once your system is installed, you may notice several differences:
- Skin: Many people notice softer skin after switching to soft water.
- Hair: Hair often feels cleaner, smoother or easier to manage.
- Soap: Soap and shampoo can lather more easily and rinse away more effectively.
2. Easier household cleaning
Hard water often leaves residue throughout the home, including spots on dishes, soap scum on shower doors and a chalky buildup around tubs and faucets. Soft water addresses these problems at their source by removing calcium and magnesium before they can form hard water scale, spots and soap scum. Existing deposits still need to be cleaned, but a water softener helps prevent those hard water issues from returning.
3. Protection for water-using appliances
When hard water is left unaddressed, it can cause mineral buildup inside pipes and water-using appliances, restricting water flow and contributing to scale-related wear. This can reduce the efficiency and performance of dishwashers, washing machines, water heaters and other water-using systems.
Research from the Water Quality Research Foundation (WQRF) examined how soft water and hard water affect household water heaters, fixtures and appliances. The study found that:
- Gas storage-tank water heaters operating on soft water maintained original efficiency over a simulated lifespan, while hard water contributed to efficiency loss.
- Electric and tankless water heaters were also affected by scale buildup.
- Showerheads using hard water experienced significant flow reduction due to scale accumulation.
- Dishwashers and washing machines supplied with soft water remained largely free of scale buildup, while those supplied with hard water required more cleaning and maintenance.
These findings are tied to the calcium and magnesium that make water hard. By removing these minerals before they form scale, a water softener helps reduce the formation of new deposits in and around your:
- Dishwasher
- Water heater
- Washing machine
- Pipes
- Sinks
- Toilets
- Bathroom tiles
- Shower doors
- Tubs
- Fixtures
4. Cost and efficiency benefits
If your home has hard water, it may be costing you in ways that are easy to overlook. Scale can affect water heater efficiency, increase wear and tear on water-using appliances, and make soaps and detergents work less effectively. You’re also likely spending additional time cleaning scale buildup from sinks, showers, tubs and more.
Potential savings vary based on water hardness, household water use, appliance type and cleaning habits. However, over time, a water softener can pay for itself.* With soft water versus hard water, you could see:
- 23% less energy needed to operate your gas water heater
- 33% increase in tank water heater lifespan
- 50% increase in washing machine and dishwasher lifespans
- 50% less detergent needed for laundry and dishwashers
- 29% less soap/shampoo needed in the shower
5. Cleaner, brighter laundry
Hard water can affect your laundry as well. It often makes fabrics feel stiff, whites look dingy and colors fade faster than they should. Because hard water makes soaps and detergents less effective, it can also reduce cleaning performance in the wash.
With soft water, detergent can work more effectively. Clothing can feel softer, fabrics can look brighter, and you’ll likely need to use noticeably less detergent.
How a water softener works
The difference between hard water and soft water relates to the presence of calcium and magnesium: hard water contains high levels of these minerals, while soft water contains minimal amounts. Here’s how the softening process works:
Step 1. Hard water flows into the water softener.
Water enters the softener’s main tank, which contains resin beads that carry a negative charge.
2. Ion exchange
The positively charged calcium and magnesium ions attach to the resin beads. In a process called ion exchange, the resin exchanges sodium or potassium ions for calcium and magnesium. The hardness minerals remain captured in the system while soft water flows throughout the home.
3. Regeneration
A second tank contains a brine solution that is used to periodically “clean” the resin beads in a process called regeneration. During regeneration, the brine solution flows into the main tank, rinsing the resin beads to remove accumulated calcium and magnesium so the system can continue producing soft water.
There is a lot happening behind the scenes, but modern water softeners require relatively little day-to-day attention. One of the primary maintenance tasks is ensuring the system has enough salt to create the brine solution. Scheduled salt delivery can help make that routine easier.
Choosing your water softener
The best water softeners have a few things in common:
- Efficiency: All standard water softeners require salt, water and energy to operate, but some are more efficient in usage than others. Culligan’s Aquasential® Smart High Efficiency Water Softener, for example, is the world’s most efficient. It can reduce softener operating costs by up to 46%.**
- Smart features: A water softener with smart features can notify you when it needs salt or maintenance, help track water use and provide alerts.
- Service and maintenance: While water softeners are generally low maintenance, they do require some service. When researching brands, look for one that offers support in this area, such as water testing, salt delivery, system maintenance and general support.
To choose the softener that’s right for your home, start with a water test and consultation with a local water professional. Different hardness levels, household sizes and water usage levels may require different system sizes and configurations.
Schedule your free water test.
Water softener FAQs
Have questions about water softeners, soft water benefits or how water softening works? Here are answers to some of the most common questions homeowners ask.
What are the biggest benefits of a water softener?
A water softener removes the calcium and magnesium that make water hard. The biggest benefits include helping prevent hard water scale, making household cleaning easier, reducing wear and tear on water-using appliances, helping soap and shampoo work more effectively, and helping laundry feel softer and look cleaner.
Does a water softener improve water quality?
If hard water is the issue, yes. A water softener improves water quality by removing the calcium and magnesium that cause hardness. It creates soft water throughout your home but does not address other water concerns that may require filtration, such as contaminants.
How do water softeners improve the shower experience?
Soft water can improve showering in two ways. First, when hard water reacts with soaps and shampoos, it leaves behind a residue on hair and skin that can cause dryness, dullness and other issues. Second, soft water makes it easier for soap and shampoo to lather and rinse away completely.
Does a water softener filter water?
No. A water softener is not a water filtration system. It is designed specifically to remove hardness minerals such as calcium and magnesium. If you have other water concerns, such as chlorine taste and odor or drinking water contaminants, you may need a separate water filtration system.
Does softened water contain sodium?
Most water softeners exchange hardness minerals such as calcium and magnesium for sodium ions, so softened water typically contains some added sodium. The amount depends on your water’s hardness level and how much hardness is removed. In many homes, the amount of sodium added is relatively low, but levels vary from one water supply to another. If you are following a sodium-restricted diet or have questions about sodium in your drinking water, speak to your doctor.
How do I know whether I need a water softener?
Common signs of hard water include scale buildup on fixtures, spotty dishes, soap scum, stiff laundry and poor soap lather. A professional water test can measure your water hardness and help determine whether a water softener is the right solution for your home.
Get help choosing and installing your water softener
If hard water is causing scale buildup, cleaning frustrations or appliance-performance issues, a water softener may help. The first step is understanding what’s in your water.
A free, in-home water test and consultation can measure your water hardness, identify other potential water concerns and help determine the right solution for your household. Your local Culligan water expert can test your water, answer your questions and recommend a customized water softener based on your home’s needs.
Get started by scheduling your free, in-home water test and consultation today.
Key takeaways
- A water softener removes the calcium and magnesium that make water hard.
- Soft water helps prevent hard water scale from forming on fixtures, plumbing and water-using appliances and helps soap and shampoo lather and rinse more easily.
- A professional water test can measure your water’s hardness and help determine the right water softener for your home.
*When switching from hard to soft water, based on average household usage of soaps, detergents and energy over a usage period of 10 years or more. Individual savings may vary.
**When configured with proportional upflow brining and Aqua-Sensor® technology.
