No, you should not drink water directly from a water softener.
Water softeners remove minerals like calcium and magnesium by replacing them with sodium or potassium. The water that comes out of a softener is treated for laundry, dishes, and bathing—not for drinking. Softened water tastes salty or flat, and the sodium content can be a concern for people on restricted diets or with certain health conditions.
If you have a whole-house softener, your kitchen tap is likely connected to it. You will need a separate drinking water line that bypasses the softener entirely, or you can use a pitcher filter, bottled water, or a point-of-use filter at the tap where you drink.
Key Takeaways
- Water softeners add sodium or potassium to water as part of the softening process, making it unsuitable for drinking without additional treatment.
- A whole-house softener typically treats all water in your home, including kitchen taps, unless you install a bypass line to the cold water line.
- People with high blood pressure, heart disease, or sodium-restricted diets should avoid softened water entirely.
- The easiest solutions are a separate drinking water tap fed by unsoftened water, a pitcher filter, or bottled water for cooking and drinking.
- Softened water is safe for bathing, laundry, and washing dishes because the sodium is not absorbed through skin or ingested in those uses.
Why Softened Water Is Not Meant for Drinking
A water softener works by running hard water through a tank filled with resin beads. These beads swap out calcium and magnesium ions for sodium or potassium ions. The result is water that lathers better, leaves fewer spots, and does not build up scale in pipes and appliances. But that sodium stays in the water.
The amount of sodium added depends on how hard your water is. Harder water requires more sodium to soften it. If your water is very hard, a softener can add 100 to 300 milligrams of sodium per liter—enough to noticeably change the taste and to matter for your health if you drink it regularly.
Softened water also tastes different to most people. Without the minerals, it can taste flat, slippery, or salty. Many people find it unpleasant to drink straight, even if the sodium content were not a concern.
Health Concerns With Drinking Softened Water
For most healthy adults, the sodium in softened water is not dangerous in small amounts. But for certain groups, it matters. People with high blood pressure, heart disease, kidney disease, or those on a doctor-ordered low-sodium diet should not drink softened water regularly. Even people without these conditions may want to limit sodium intake, and drinking softened water adds an unnecessary source.
Infants under one year old should not drink softened water at all. Their kidneys are still developing and cannot handle the extra sodium the way adult kidneys can. If you have a softener and an infant in the house, use unsoftened water for formula and drinking.
If you are unsure whether softened water is safe for you or a family member, ask your doctor. They know your health history and can tell you whether the sodium content is a concern.
How to Get Drinking Water If You Have a Softener
The simplest solution is to install a bypass line on your softener. This is a small pipe that diverts cold water from the main line before it enters the softener tank. The bypass line feeds directly to your kitchen cold water tap, giving you unsoftened water for drinking and cooking while the rest of the house gets softened water. A plumber can install this in an hour or two, and the cost is usually between $150 and $300.
If you rent or do not want to modify your plumbing, a pitcher filter or faucet-mounted filter can reduce sodium and improve taste. These are not as thorough as a bypass line, but they work for most people. Pitcher filters cost $20 to $40 and need replacing every two to three months. Faucet filters cost $30 to $60 and last three to six months.
Another option is to use bottled water for drinking and cooking. This is more expensive over time but requires no installation and works when ready. A gallon of bottled water costs $1 to $3 depending on where you buy it.
Testing Your Water If You Are Unsure
If you are not certain whether your tap water is softened, you can test it. The easiest way is to look for a water softener tank in your basement, garage, or utility room. It is usually a tall cylinder, often white or tan, with a control head on top and a drain line running to a floor drain or outside.
You can also test the water itself. Softened water will not lather well with soap—it will feel slippery instead. Hard water lathers easily. You can also buy a water hardness test kit at a hardware store for $10 to $20. These kits use a small vial and color-changing liquid to show whether your water is hard or soft.
If you want to know the exact sodium content, contact your water utility or a water testing lab. Many utilities provide a free water quality report each year that lists sodium levels. A professional water test costs $100 to $300 but gives you complete information about everything in your water.
Softened Water for Other Uses Is Fine
While you should not drink softened water, it is perfectly safe and actually better for most other household uses. Softened water cleans dishes and laundry more effectively, uses less soap, and prevents mineral buildup in pipes and water heaters. Bathing and showering in softened water is safe—your skin does not absorb the sodium, and it actually feels better to many people because it rinses more cleanly.
Softened water is also better for appliances. It extends the life of your water heater, dishwasher, and washing machine by preventing scale buildup inside the tanks and pipes. If you have hard water, a softener is a worthwhile investment for these reasons alone.
What to Do If You Already Drank Softened Water
If you drank softened water for a few days or weeks without knowing, there is no cause for alarm. The amount of sodium is not toxic in the short term. However, if you have a health condition that requires a low-sodium diet, or if you have been drinking softened water regularly for months, talk to your doctor. They can check your sodium levels if needed.
Once you realize your water is softened, the next step is to set up one of the solutions above—a bypass line, a filter, or bottled water. This prevents any ongoing exposure and gives you peace of mind.
Frequently Asked Questions
Can I drink softened water if I do not have high blood pressure?
Most healthy adults can drink small amounts of softened water without harm. However, regularly drinking softened water adds unnecessary sodium to your diet. It is still better to use unsoftened water for drinking and cooking, even if you do not have a medical reason to avoid sodium.
Does boiling softened water remove the sodium?
No. Boiling removes some minerals and gases, but sodium stays in the water. If you want to remove sodium from softened water, you need a reverse osmosis filter or distiller, not boiling.
Is softened water safe for pets?
Pets can drink softened water in small amounts, but it is not ideal. If your pet has kidney disease or heart disease, ask your veterinarian before letting them drink softened water regularly. For healthy pets, unsoftened water is still the better choice.
What if my water softener uses potassium instead of sodium?
Potassium-based softeners are safer than sodium-based ones for people on low-sodium diets, but they are more expensive and less common. Even with potassium, the water is still not ideal for drinking because it tastes flat and the potassium can be a concern for people with kidney disease. A bypass line or filter is still the best solution.
How much does it cost to install a bypass line?
A bypass line typically costs $150 to $300 in labor and materials if a plumber installs it. If you are handy with plumbing, you can buy the parts for $20 to $50 and install it yourself, but most people hire a professional to may support it is done correctly and does not leak.