Spring Water vs. Purified Water: What’s the Difference?

Buying bottled water at the store can present an almost overwhelming amount of options. With labels like deionized, purified, distilled, and others, you won’t be alone in feeling a little lost over what the right choice is for you.  It helps to know what these labels mean, and how they can impact the taste and quality of the water inside. According to the FDA, bottled water falls into one of three categories based on their source and the level of filtration involved:

1. Spring water
2. Mineral Water
3. Purified Water

What is Spring Water?

In order to be classified as natural spring water, the FDA requires that water must come from an underground well or spring.  Once water has been collected from the spring, it must also be filtered before being bottled and made available for consumers. Most filtration systems for spring water are designed to allow most of the naturally occurring minerals that can make spring water so appealing to remain in the water, so you can enjoy the benefits of mineral rich spring water without having to worry about potentially harmful contaminants. By contrast, purified water is much more ‘pure’ in composition and has generally undergone more rigorous filtration.

What is Purified Water?

To be classified as purified water, the FDA requires that water to have gone through one of three purification processes: deionization, reverse osmosis, or distillation. In all of these forms of filtration, water undergoes a process that removes all but the most basic water molecules, so you end up with water at its most elemental, or pure, form. So when you’re looking at bottled water labels and see terms like “deionized water” or “reverse osmosis water” those are generally clues the water is purified according to FDA standards for bottled drinking water.

Spring Water Vs. Purified Water Differences

The main difference between spring water and purified water comes down to how they are sourced and treated.

Source: Spring water comes from a natural underground spring, while purified water can come from any source, including tap water, groundwater, or surface water.

Treatment process: Spring water is naturally filtered through layers of rock and soil and typically undergoes minimal processing. Purified water, on the other hand, is treated using methods like reverse osmosis, distillation, or carbon filtration to remove impurities.

Mineral content: Spring water contains naturally occurring minerals such as calcium and magnesium, which can contribute to its taste. Purified water has most of these minerals removed during treatment, resulting in a lower mineral content.

Taste: Because of its mineral content, spring water often has a more distinct taste that can vary depending on the source. Purified water usually has a clean, neutral, and consistent taste.

Consistency: Spring water can vary slightly from batch to batch depending on environmental conditions. Purified water is much more consistent because it is processed to the same standard every time.

Contaminant removal: Purified water is designed to remove the vast majority of contaminants, often eliminating up to 99 percent or more. Spring water is safe to drink but may not go through the same level of intensive purification.

Health Considerations: Purified vs Spring Water

When comparing health benefits, both types of water are generally safe, but there are a few differences:

• Purified water
  • Removes contaminants like lead, chlorine, and bacteria
  • Ideal for people who want highly controlled water quality
• Spring water
  • Contains natural minerals that may support hydration
  • Less processed, which some people prefer

For most people, the difference comes down to preference rather than safety, as long as the water meets quality standards.

Is Spring Water or Purified Water Better?

It depends on what you are looking for.

• Choose spring water if you prefer:
  • Natural mineral content
  • A more distinct or “fresh” taste
• Choose purified water if you want:
  • Maximum contaminant removal
  • Consistent, clean taste
  • More control over water quality

Both are safe to drink, but they serve slightly different preferences and needs.

Is Spring Water Good for You?

Spring water can be a good option because it contains naturally occurring minerals like calcium and magnesium, which can support hydration and overall health. However, it is important to note that mineral levels vary depending on the source, not all contaminants may be removed to the same level as purified water, and quality depends on proper bottling and source protection.

Which Is Better for Everyday Use?

Here’s a quick breakdown based on common uses:

• Drinking: Either works, depending on taste preference
• Coffee and tea: Purified water provides more consistent flavor
• Cooking: Purified water avoids altering taste
• Babies or sensitive individuals: Purified water is often preferred due to lower contaminant risk
• Athletes or hydration: Spring water may provide trace minerals

Get Started With the Right Water For You

If you want cleaner, better-tasting water at home, exploring filtration or purification systems can help you achieve consistent water quality without relying on bottled options. Culligan of San Diego offers free water tests to help you find the right system for your home.