Is Spring Water Better Than Purified Water?

The Short Answer

The "better" water depends entirely on whether you prioritize natural minerals or guaranteed purity.

Purified water is the safer choice if you are worried about contaminants. Because it undergoes rigorous processing (usually reverse osmosis or distillation), it is almost guaranteed to be free of PFAS, lead, bacteria, and parasites. However, this process also strips away all beneficial minerals, making the water "dead" and slightly acidic unless the brand adds electrolytes back in.

Spring water is the healthier choice for mineral intake, containing natural calcium, magnesium, and potassium that your body absorbs easily. However, "natural" does not mean clean. Since spring water undergoes minimal processing, it is vulnerable to whatever is in the groundwater—including nitrates from farming, arsenic from rocks, and increasingly, PFAS.

The Bottom Line: If you buy plastic bottles, you are drinking microplastics regardless of the water type. The true gold standard is spring water in glass bottles (tested for PFAS) or home-filtered water (RO) that you remineralize yourself.

Why This Matters

1. The "Natural" Trap

Marketing has convinced us that "coming from a spring" means water is pristine. It doesn't. FDA regulations for spring water focus on the origin (it must come from underground), not the purity. If the groundwater is contaminated with agricultural runoff or industrial chemicals, the "natural" spring water you buy will be too. Purified water, by definition, must meet a strict standard of low Total Dissolved Solids (TDS), meaning the "junk" has been removed.

2. The Nanoplastic Nightmare

A groundbreaking 2024 study from Columbia University found that bottled water contains 10 to 100 times more plastic fragments than previously thought—averaging 240,000 particles per liter. Most of these are nanoplastics, which are small enough to enter your bloodstream and cells. This affects both spring and purified water equally if they are sold in plastic bottles. Is Plastic Water Bottle Leaching A Real Concern

3. The Mineral Void

Drinking ultra-pure water (distilled or RO) pulls minerals out of your body if you don't get enough from food. Purified water is often slightly acidic (pH 5.0–6.0) because it absorbs carbon dioxide from the air. Over time, drinking demineralized water can slightly compromise your electrolyte balance. Spring water naturally provides calcium and magnesium, which are protective for heart health. Is Reverse Osmosis Missing Important Minerals

What's Actually In The Bottle

Here is how the two types break down at a chemical level.

Spring Water

Defined by: Its source. Must flow naturally to the surface from an underground formation.

• Natural Minerals: Rich in Calcium, Magnesium, Potassium, and Bicarbonates. What Minerals Should Be In Drinking Water
• Microbes: Generally treated with UV or ozone, but retains more natural bacteria profile than purified.
• Contaminant Risk: Moderate. High variability between brands. "Protected sources" can still be impacted by nearby pollution.

Purified Water

Defined by: Its treatment. Must be processed to reduce dissolved solids to <10 ppm.

• Treatment Methods: Reverse Osmosis (forces water through a membrane) or Distillation (boils water and collects steam).
• Mineral Content: Near zero (unless "remineralized" or "electrolytes added for taste").
• Contaminant Risk: Very Low. The processing removes 99%+ of lead, PFAS, arsenic, and bacteria. What Is In Municipal Tap Water

What to Look For

Green Flags (Spring):

• "Bottled at the source" — Reduces contamination risk during transport.
• Glass Packaging — The only way to avoid microplastic leaching.
• Water Quality Report — Brand publicly posts recent lab tests (not just a 5-year-old PDF).

Red Flags (Purified):

• "Distilled" without added minerals — Okay for appliances, not ideal for daily drinking.
• Acidic Taste — Indicates the water has absorbed too much CO2 and has no buffering minerals.
• Opaque Sourcing — If it just says "municipal source," you are paying a 2000% markup for tap water.

The Best Options

If you are buying bottled water, prioritize packaging first, then water type.

The Bottom Line

1. Ditch the plastic. The type of water matters less than the bottle it comes in. The health risks from nanoplastics likely outweigh the mineral benefits of spring water in a plastic bottle.

2. Choose Purified if you have trust issues. If you are buying a random brand at a gas station, purified water is the safer bet. It guarantees that biological and chemical contaminants have been removed.

3. Choose Spring for home delivery. If you can get glass 5-gallon jugs (like Mountain Valley or local spring delivery), this is the healthiest water you can drink—natural minerals with zero plastic.

FAQ

Does purified water dehydrate you?

No, but it doesn't hydrate you as efficiently as mineral-rich water. Pure water lacks electrolytes (sodium, potassium) that help your cells absorb fluid. If you drink only distilled or RO water, you should ensure your diet is rich in minerals or add a pinch of sea salt. Should You Remineralize Your Filtered Water

Is Smartwater considered spring or purified?

Smartwater is purified. It is made using vapor distillation (simulating the hydrologic cycle) and then has electrolytes added back in for taste. It does not come from a spring.

Can spring water contain PFAS?

Yes, absolutely. A 2020 Consumer Reports study found PFAS in several popular spring water brands. Because spring water is not filtered through Reverse Osmosis (which removes PFAS), any contamination in the ground source ends up in the bottle. What Water Filter Removes Pfas