Yes, you can drink softened water, but most people don't recommend it as your main drinking source

Water softeners remove minerals like calcium and magnesium by replacing them with sodium or potassium. The water that comes out is safe to drink in the sense that it won't poison you, but it tastes flat and slightly salty to most people. More importantly, if you have high blood pressure or are on a sodium-restricted diet, the added sodium can be a real concern — a glass of softened water contains roughly 50 to 100 milligrams of sodium per 8 ounces, depending on how hard your original water was.

The bigger issue is that softened water loses the minerals your body actually uses. Calcium and magnesium aren't just scale buildup — they're nutrients. Drinking only softened water means you're not getting those minerals from your tap, which matters if you don't get enough from food.

Key Takeaways

  • Softened water is not harmful to drink in small amounts, but it tastes noticeably different and contains added sodium.
  • People on sodium-restricted diets or with high blood pressure should avoid drinking softened water regularly.
  • Most households install a bypass line or separate tap so unsoftened water is available for drinking and cooking.
  • If you want to drink softened water, a reverse osmosis filter on your kitchen tap removes most of the sodium and improves the taste.

Why softened water tastes different

Hard water minerals give tap water a slightly mineral taste that most people don't notice until it's gone. When a water softener removes calcium and magnesium, the water tastes flat — some describe it as soapy or slippery on the tongue. This happens because sodium doesn't have the same mineral flavor, and the water feels different in your mouth.

The taste issue is why most people who install water softeners also install a separate tap in the kitchen that delivers unsoftened water. This tap pulls water directly from the main line before it enters the softener, so you get hard water for drinking and cooking while the rest of the house gets soft water for washing and cleaning.

The sodium content and who should avoid it

A water softener that uses sodium chloride (table salt) adds sodium to every glass of water. The amount depends on how hard your water is. If your water is moderately hard, you're looking at 50 to 100 milligrams of sodium per 8-ounce glass. If your water is very hard, that number can climb to 200 milligrams or higher.

For context, the American Heart Association recommends no more than 2,300 milligrams of sodium per day. If you drink eight glasses of softened water daily from very hard water, you could be getting 1,600 milligrams just from drinking water — before you eat any food. For people with high blood pressure, heart disease, or kidney problems, this is a real issue.

If you're on a sodium-restricted diet, ask your doctor whether softened water is safe for you. Some people can handle it; others need to avoid it entirely. If you have a water softener and a sodium restriction, the easiest solution is to drink unsoftened water from a separate kitchen tap or to use a reverse osmosis filter.

Potassium chloride softeners as an alternative

Some water softeners use potassium chloride instead of sodium chloride. These add potassium to your water rather than sodium, which sounds like a better option — but it's not always. Potassium-based softeners cost more upfront and are harder to find, and potassium can be just as problematic for people with certain kidney conditions or those taking certain medications.

If you're considering a potassium softener because of sodium concerns, talk to your doctor first. For most people with high blood pressure, a separate unsoftened tap or a reverse osmosis filter is cheaper and simpler than switching softener types.

Installing a bypass line or separate tap

The standard solution in homes with water softeners is a bypass line — a connection that lets you pull unsoftened water directly from the main line before it reaches the softener. This is usually installed during the softener setup, but it can be added later. A plumber can run a separate line to a dedicated kitchen tap in about an hour.

The cost of adding a bypass tap is typically $150 to $300 in labor plus the cost of the tap itself. If your softener was installed without one and you want unsoftened water for drinking and cooking, this is the most reliable way to get it. The tap sits right next to your regular kitchen faucet and delivers cold, hard water on demand.

Using a reverse osmosis filter on softened water

If you already have a water softener and no bypass tap, a reverse osmosis (RO) filter under your kitchen sink removes most of the sodium and improves the taste. An RO system forces water through a membrane that catches sodium, minerals, and other dissolved solids. The result tastes better and contains far less sodium than straight softened water.

A basic under-sink RO system costs $150 to $400 and takes about an hour to install if you're comfortable with plumbing, or $200 to $500 if you hire a plumber. The filters need replacing every 6 to 12 months, which costs $50 to $100 per year. It's not as clean a solution as a bypass tap, but it works if you can't install one.

What happens if you only drink softened water

Drinking only softened water for years won't cause acute illness, but it's not ideal. You're missing the calcium and magnesium that hard water provides, and you're getting extra sodium. If you get enough calcium and magnesium from dairy, leafy greens, nuts, and other foods, the missing minerals from water matter less. But if your diet is already low in these minerals, softened water makes the gap worse.

The sodium is the bigger concern for people with blood pressure or kidney issues. If that's you, don't rely on softened water as your main drinking source. Use a bypass tap, a separate unsoftened line, or an RO filter instead.

Frequently Asked Questions

Is softened water bad for you to drink?

Softened water is not toxic, but it's not ideal as your only drinking water. The added sodium is the main concern for people with high blood pressure or on sodium-restricted diets. The loss of calcium and magnesium is a secondary issue if your diet doesn't provide enough of these minerals.

How much sodium does a water softener add?

The amount depends on how hard your water is. Moderately hard water typically results in 50 to 100 milligrams of sodium per 8-ounce glass. Very hard water can add 200 milligrams or more. You can ask your water utility for a hardness test or have one done yourself to get an exact number.

Can I drink softened water if I have high blood pressure?

Talk to your doctor first. Some people with high blood pressure can tolerate small amounts of softened water, while others need to avoid it entirely. If you have a softener, the safest approach is to install a bypass tap for unsoftened drinking water or use a reverse osmosis filter.

Do I need a separate tap for drinking water if I have a water softener?

Not required, but recommended. A separate tap that delivers unsoftened water is the simplest way to avoid sodium and get better-tasting drinking water. If you can't install one, a reverse osmosis filter under your kitchen sink is a good alternative.

What's the difference between sodium and potassium water softeners?

Sodium softeners add sodium to your water; potassium softeners add potassium. Potassium is not a concern for blood pressure, but it can be problematic for people with kidney disease or those taking certain medications. Potassium softeners also cost more and are less common. Ask your doctor which is safer for your situation.