Is Softened Water Safe to Drink? What the Science Says

If you just had a watersoftenerpros.com/blog/water-softener-benefits-home/?utm_source=internal&utm_medium=blog&utm_campaign=water-softener-benefits-home”>water softener installed — or you’re thinking about getting one — this question probably crossed your mind at some point: Is softened water actually safe to drink?

It’s a fair question. A water softener changes your water. You can feel the difference on your skin, see it in your dishes, and notice it in the shower. So it makes sense to wonder what’s different about it chemically, and whether drinking it every day is something you should think twice about.

Here’s the honest answer: for most people, softened water is perfectly safe to drink. But there are some nuances worth understanding — especially if you’re on a sodium-restricted diet, have kidney concerns, or live in an area like Utah where your source water is particularly hard to begin with.

What a Water Softener Actually Does to Your Water

A water softener is not a filter. It doesn’t remove contaminants, and it doesn’t purify your water the way a reverse osmosis system does. What it does is perform a process called ion exchange.

Your Utah tap water comes loaded with dissolved calcium and magnesium — the minerals that cause hard water. As water flows through the softener’s resin tank, those hardness minerals are attracted to and captured by the resin beads. In exchange, a small amount of sodium (or potassium, if you use potassium chloride salt) is released into the water in their place.

That’s the whole process. Calcium and magnesium out. Sodium or potassium in. The water itself isn’t altered in any other way — it’s not discolored, it’s not contaminated, and no harmful chemical is being added.

How Much Sodium Does Softened Water Actually Contain?

This is where most people’s concerns live, and it’s worth being specific rather than vague.

The amount of sodium added to softened water depends directly on how hard your source water is. The harder the water, the more calcium and magnesium there is to exchange — and the more sodium ends up in the softened water as a result.

In Northern Utah, water hardness typically runs anywhere from 12 GPG (grains per gallon) in parts of Salt Lake City to 25+ GPG in areas like Eagle Mountain or Herriman. That’s among the hardest water in the country. At those hardness levels, softened water will contain more sodium than it would in a softer-water region.

To put it in perspective: an 8-ounce glass of softened water from a moderately hard source (around 15–17 GPG) contains roughly 30–50 milligrams of sodium. A single slice of white bread contains around 130 milligrams. The American Heart Association’s daily sodium limit for most adults is 2,300 milligrams. For the average healthy person, the sodium contribution from softened water is nutritionally insignificant.

That said, if you’re on a medically supervised low-sodium diet, your doctor may recommend avoiding softened water at the kitchen tap — or switching to potassium chloride instead of salt in your softener.

The Potassium Option: A Practical Alternative

Every Water Softener Pros system is compatible with potassium chloride as a direct replacement for sodium-based salt. Instead of adding a small amount of sodium, the ion exchange releases potassium into the water instead.

Potassium is an essential mineral — most Americans actually don’t get enough of it. So for households that want fully drinkable, whole-home soft water without any sodium concern, a potassium chloride setup can make a lot of sense. It costs more per bag than regular salt, but it removes the drinking water sodium question entirely.

There is one exception worth noting: people with kidney disease or those on dialysis should consult their physician before drinking potassium-enriched water, since potassium regulation can be impaired in those conditions.

Want to understand more about how salt choices affect your softener’s performance? Our guide on water softener salt types breaks down pellets, crystals, rock salt, and potassium in practical detail.

Why Most Utah Homes Keep the Kitchen Cold Tap Hard

If you look at how most Utah homes are plumbed, you’ll notice something: many of them have a soft water loop that deliberately leaves the kitchen cold water tap, the refrigerator water line, and any house-attached outdoor faucets on the hard (unsoftened) side of the plumbing.

This is intentional, and it’s the standard approach for a reason. It eliminates any sodium concern at the drinking and cooking tap entirely, while still delivering softened water to the bathrooms, laundry, and hot water system — where the scale-prevention and quality-of-life benefits matter most.

If your home has a pre-plumbed soft water loop, your installer will connect to it and those designated taps will remain on hard water automatically. If your home doesn’t have a loop, Water Softener Pros will discuss your options during installation and work with your existing plumbing layout.

When a Reverse Osmosis System Makes More Sense for Drinking Water

Here’s the reality: a water softener makes your water soft. It doesn’t make it pure. If your concern is about what’s in your drinking water beyond hardness — chlorine, chloramines, trace pharmaceuticals, nitrates, heavy metals, or other contaminants — a softener isn’t the right tool for that job.

A reverse osmosis (RO) system filters water down to approximately 99.7% purity when the filters and membrane are fresh. It installs under your kitchen sink with its own dedicated faucet, and it handles the things a softener can’t touch.

For Utah homeowners with very hard water (and some of the highest GPG readings in the country), an RO system paired with a water softener is often the most complete solution. The softener handles the whole house — protecting your appliances, pipes, and water heater from scale buildup. The RO handles the kitchen drinking and cooking water, taking it down to near-pure quality regardless of what the source water contains.

Water Softener Pros installs RO systems for $650 installed, including a chrome faucet. If you want a designer faucet in matte black, brushed nickel, or oil-rubbed bronze to match your kitchen hardware, that’s an $80 add-on. The RO gets its own countertop faucet — it can’t run through the main kitchen tap — but it can often be connected to the refrigerator water line as well, depending on your home’s layout.

The Slippery Feeling Isn’t Sodium — Here’s What It Really Is

A lot of people mistake the feel of soft water for soap or sodium left on their skin. It makes sense as a first instinct, but it’s actually the opposite of what’s happening.

Hard water reacts with soap to form soap scum — a filmy residue that clings to skin, tubs, and tiles. When you switch to soft water, that reaction stops. Your skin’s natural oils are no longer being stripped away or coated with mineral film. What you’re feeling is your own clean skin, not a residue. It takes a few showers to get used to it, but there’s nothing being left behind.

What About Cooking and Baby Formula?

For general cooking — boiling pasta, making coffee, cooking vegetables — softened water from a hard-water-area tap is fine for most households. The sodium added is minimal and diluted further in cooking.

For mixing infant formula, however, many pediatricians recommend using purified or bottled water rather than tap water in general, regardless of whether it’s been softened. If this is a concern for your household, an RO system under the kitchen sink is the most practical and cost-effective long-term solution compared to buying bottled water indefinitely.

The Bottom Line on Drinking Softened Water

For most healthy adults in Northern Utah, softened water is safe to drink. The sodium added through ion exchange is modest — especially compared to the sodium in everyday foods — and the process doesn’t introduce any harmful substance into your water.

If you have specific health concerns around sodium intake or kidney function, talk to your doctor, and consider either potassium chloride as your softener salt or leaving the kitchen cold tap on the hard side of the plumbing — which is standard practice anyway in most Utah homes with a soft water loop.

And if pure drinking water at the kitchen sink is a priority, pairing a softener with an RO system covers both goals completely.

Our systems use metered (on-demand) regeneration — meaning your softener only regenerates when it actually needs to based on your household’s water use, not on a fixed timer. That keeps salt use efficient and your water quality consistent.

Ready for Soft Water in Northern Utah?

If you’ve been wondering whether softened water is right for your home, Water Softener Pros makes it straightforward. We serve the Salt Lake City metro, Utah Valley, and the Ogden area with transparent, posted pricing — no salespeople, no “call for a quote” games, and no payment until installation is complete. Get a quote online or call us at (801) 845-9658.