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By Corina Ciocirlan's Images on Canva

If you have ever stood in the bottled water aisle feeling overwhelmed by the options, you are not alone. Spring water, mineral water, purified water, alkaline water, electrolyte water. The labels all look similar, and most of us just grab whatever is on sale and move on.

But here is the thing. Not all bottled water is the same. The differences come down to where the water is sourced, what it contains, and how it is processed. Once you understand a few basics, choosing the right water for your family becomes a lot simpler.

The Three Main Types of Bottled Water

The FDA actually regulates how bottled water can be labeled, and each type has a specific definition (U.S. Food and Drug Administration [FDA], 2018). Here is a quick breakdown of the three you will see most often.

Spring water comes from an underground source that flows naturally to the earth's surface. It is collected at the spring or through a borehole that taps the same underground formation. Spring water retains the minerals it picks up as it moves through rock and soil, but the mineral content can vary from source to source and even season to season.

Mineral water also comes from a protected underground source, but it must meet higher standards. According to FDA regulations, mineral water must contain at least 250 parts per million (ppm) of total dissolved solids, or TDS, and those minerals have to occur naturally. No minerals can be added after the fact (FDA, 2018). The mineral composition must remain consistent over time, which is why every bottle of a given mineral water brand should taste the same.

Purified water can come from any source, including tap water. What makes it "purified" is the treatment process. Methods such as reverse osmosis, distillation, and deionization remove most minerals and contaminants. The result is very clean water with a neutral taste, but it also means many of the naturally occurring minerals have been removed.

Martin Riese, a certified water sommelier who received his credentials from the German Mineral Water Trade Association and has been featured by National Geographic, NPR, and Netflix, puts it bluntly. In an NPR interview, Riese stated that he considers purified water brands overpriced and unnecessary, recommending that consumers who want filtered water simply install a home filter and use a reusable bottle instead of buying plastic-bottled purified water (Pfeiffer, 2023). His point is a good one for budget-conscious families. If you are paying a premium, make sure you are getting something your tap water cannot provide.

What TDS, pH, and Sodium Actually Mean

You might have noticed terms like TDS, pH, and sodium on water labels. Here is what they mean in plain language.

TDS (Total Dissolved Solids) measures the concentration of dissolved solids in water, primarily minerals such as calcium, magnesium, potassium, and sodium. Higher TDS means more minerals and a stronger taste. Lower TDS means a lighter, softer flavor. Most mineral waters fall between 250 and 2,500 ppm.

pH measures how acidic or alkaline the water is on a scale from 0 to 14, with 7 being neutral. For everyday hydration, a pH near neutral is generally considered ideal.

Sodium is worth paying attention to, especially for families. Some mineral waters carry relatively high sodium levels. If you are watching sodium intake for yourself or your kids, choose brands on the lower end.

Why the Source Matters More Than You Think

One of the key differences among bottled water brands is the source of the water. A mineral water sourced from a volcanic region in Germany will have a completely different mineral profile than one from an Alpine spring in Italy or a limestone aquifer in Arkansas.

Riese has spoken extensively about this concept, comparing water's mineral signature to terroir in winemaking. Just as the soil where grapes are grown shapes wine's flavor, the underground rock through which water filters shapes its mineral content and taste (Lott-Schwartz, 2019).

For families, a water with a balanced mineral profile and low sodium tends to be the most versatile. It works well for drinking, pairs easily with meals, and does not have the strong mineral taste that children often reject. Riese notes that lighter mineral waters pair better with delicate foods, while higher-mineral options pair better with richer dishes (Pfeiffer, 2023).

Brands like Chiarella, an Italian mountain spring mineral water from the Lake Como Alps, are a good example of this kind of balance. Drawn from a protected spring at 750 meters, it is naturally enriched with calcium, magnesium, and potassium while maintaining one of the lowest sodium levels in Europe. It also comes exclusively in glass bottles, which avoids the concerns around chemicals leaching from plastic packaging.

Glass vs. Plastic: Does the Bottle Matter?

Speaking of packaging, this is one area where the research is pretty clear. Plastic bottles, especially when exposed to heat or stored for long periods, can release chemicals like BPA and phthalates into the water. A peer-reviewed study published in the Journal of Water and Health found that BPA and phthalates in commercially available plastic water bottles pose potential health risks, particularly because these chemicals act as endocrine disruptors that can interfere with hormonal function (Rouse da Silva Costa et al., 2021).

Dr. Mark Hyman, a functional medicine physician and bestselling author, has been vocal about this issue. In his writing on environmental toxins, Dr. Hyman notes that BPA is a synthetic compound found in plastic water bottles and canned foods that mimics estrogen in the body, and he recommends swapping plastic food and drink containers for glass whenever possible (Hyman, 2016).

You do not need to panic about the occasional plastic water bottle. But if you regularly buy bottled water for your household, glass is the safer choice. Glass is inert, meaning it does not react with the water or alter its composition. If glass is not practical for every situation, look for BPA-free options and avoid leaving plastic bottles in hot cars or direct sunlight.

A Simple Checklist for Choosing Better Water

Next time you are shopping for bottled water, here are a few things to look for:

Water Type: Mineral water and spring water retain natural minerals. Purified water has been stripped of most of them.

TDS: For everyday drinking, a TDS between 250 and 500 ppm gives a lighter, versatile taste. Go higher for post-workout hydration.

Sodium: Lower is generally better for daily family use.

Packaging: Glass is ideal. If buying plastic, store bottles properly and look for BPA-free labels.

Water Source: A named, protected underground source is a good sign. "Purified water" from a municipal source is essentially treated tap water.

The Bottom Line

You do not need to become a water expert to make better choices for your family. Just understanding the basics of how bottled water is categorized, what the label terms mean, and why the source matters puts you ahead of most shoppers in the aisle.

The best water for your family is one that tastes good, has a clean mineral profile, and comes in packaging you feel good about. Everything else is just marketing noise.

References

●       Hyman, M. (2016, July 25). Get these toxins out of your house. Mark Hyman, MD.

●       Lott-Schwartz, H. (2019, May 4). Meet water sommelier Martin Riese. National Geographic.

●       Pfeiffer, S. (2023, July 16). Meet the water sommelier advocating for clean drinking water. NPR.

●       Rouse da Silva Costa, T., Fernandes, T. S. M., Almeida, E. S., Oliveira, J. T., Guedes, J. A. C., Zocolo, G. J., de Sousa, F. W., & do Nascimento, R. F. (2021). Potential risk of BPA and phthalates in commercial water bottles: A minireview. Journal of Water and Health, 19(3), 411-435.

●       U.S. Food and Drug Administration. (2018, April 5). Bottled water everywhere: Keeping it safe.