How to Differentiate Between Hard and Soft Water Once and For All

What Is Hard Water?

According to the United States Geological Survey (USGS) website, “Hard water is high in dissolved minerals, largely calcium and magnesium.” These minerals come from everything passed through in the water’s journey to get from its original source to your home, including soil, pipes, and more. If you’ve ever noticed a ring or film of white chalky sediment in your water glass, you might have hard water.

Is Hard Water Bad for Your Skin and Hair?

Hard water can be bad for your skin and hair due to all of the buildup of minerals. Most notably, hard water can cause skin dryness and irritation. However, “hard water is not considered a health hazard; in fact, there are a few pros and cons that vary from each individual's skin type and hair type,” says Bradford. 

“Hard water can also cause a decline in the effectiveness or application of your body soap and daily shampoo and conditioner, because it interferes by preventing the products from rinsing out of your hair and skin,” explains Bradford. In rare, more serious cases, hard water may contribute to scalp calcification

How to Tell If You Have Hard Water

Besides white spots on your faucet or shower, you might be dealing with hard water if your hair and skin appears to have the following, according to Bradford.

1. Product Build-Up: This can look like residue on hair strands and a lack of moisture absorption when trying to use hydrating products.

2. Dull-Looking Hair: Especially if your hair is color-treated, you might notice that color is fading quickly, despite frequent salon visits.

3. Hair Dryness: Despite using hydrating products, you might notice brittleness and hair shedding.

4. Film Left Behind on Hair or Skin: If your hair doesn’t feel or look clean after you wash it, hard water might be to blame. 

5. Itchy Scalp: Of course, scalp irritation can be caused by a number of things, so make sure to visit your dermatologist if you’re dealing with any form of scalp irritation. They can help you better identify the root cause. 

What Is Soft Water?

Soft water doesn’t necessarily mean it’s completely free of minerals such as magnesium and calcium, just that it’s present in much lower doses. In fact, the USGS classifies soft water as containing “zero to 60 milligrams per liter (mg/L) as calcium carbonate.”

Does Soft Water Make Your Skin and Hair Softer?

According to Bradford, “Soft water can make your hair and skin feel softer and more manageable by reducing frizzy hair and improving hair texture.” This is why some hair experts also recommend adding a soft water filter to your showerhead for fast results. 

Can Soft Water Be Bad for Your Skin and Hair?

Like so many other beauty questions, hard vs. soft water does come down to your hair’s personal needs. But in general, Bradford says that soft water is not bad for your skin and hair. 

Hard Water vs. Soft Water: Which Is Better?

Due to the fact that soft water allows for better product absorption, is less drying, and is less mineral-heavy than hard water, soft water is generally considered better for hair and skin health. However, you know what works best for you. Those who have grown up in a hard water environment their entire lives might not notice much of a difference between hard and soft water. If you’re curious, a pretty low-stakes way to try soft water is by attaching a showerhead filter.