What actually separates mineral water from spring water? Source rules, mineral content, EU and US regulation, and how to choose for daily drinking.
A legally protected category in the EU and a regulated FDA category in the US. Must come from a single, microbiologically protected underground source, be bottled at source, and carry a stable, declared mineral composition.
Treatment is heavily restricted — no chemical disinfection, no demineralization. Mineral content is usually 250–3,000+ mg/L and is part of the product's identity (calcium, magnesium, bicarbonate, sulphate).
Also originates underground and either emerges naturally at a spring or is collected via borehole from the same formation. No minimum mineral concentration is required.
More processing is allowed (filtration, limited treatment). Mineral content is usually lower and more variable — most spring waters sit between 50 and 500 mg/L TDS, with neutral taste profiles preferred for everyday drinking.
| Attribute | Mineral water | Spring water |
|---|---|---|
| Source | Single, protected underground source, bottled at source | Underground spring flowing naturally to the surface; can be collected via borehole |
| Mineral content | Stable, declared on the label; typically 250–3,000+ mg/L TDS | Variable; usually 50–500 mg/L TDS, no required minimum |
| Treatment allowed | EU: only iron, sulphur and manganese removal — no disinfection, no demineralization | Filtration and limited treatments allowed in most jurisdictions |
| Regulation (EU) | Directive 2009/54/EC — strictest bottled-water category | Covered by the same directive but with looser composition rules |
| Regulation (US) | FDA: ≥ 250 ppm TDS from a protected source | FDA: must flow naturally to surface from an underground formation |
| Label promises | Therapeutic / nutritional claims possible when minerals justify them | Marketed on purity and origin, not mineral therapy |
| Typical examples | Evian, Vittel, Contrex, Gerolsteiner, San Pellegrino, Vichy Catalan | Poland Spring, Arrowhead, Crystal Geyser, Highland Spring, Acqua Panna |
| Best for | Mineral intake (Ca, Mg, bicarbonate), gastronomy, sparkling | Everyday hydration, neutral taste, mixing |
Both come from underground sources, but mineral water must come from a single, protected source with a stable, declared mineral composition, and it must be bottled at source with virtually no treatment. Spring water also originates underground and emerges naturally at a spring or via borehole, but it has no minimum mineral content requirement and can undergo more processing.
Mineral water can contribute meaningful amounts of calcium, magnesium and bicarbonate — for example, 1 L of Contrex provides ~468 mg of calcium. Spring water generally has lower mineral content and doesn't deliver the same nutritional contribution, but it's perfectly healthy for hydration. People on low-sodium diets should check labels: some mineral waters (Vichy Catalan, Apollinaris) are very high in sodium.
Not exactly. 'Natural spring water' is a specific FDA/EU category requiring an underground spring source. 'Natural water' is a looser US label meaning the water is not from a municipal supply but doesn't guarantee spring origin.
No — the categories are defined by source and process, not by mineral concentration alone. Even if a spring water happens to be mineral-rich, it can only be sold as 'natural mineral water' if its source is officially protected and recognized, and if it is bottled at source under stricter rules.
For most people, low-to-moderate mineral content spring or mineral water (e.g., Evian, Volvic, Highland Spring, Acqua Panna) is the most balanced everyday choice. Very high TDS mineral waters are best used as a supplement rather than a primary hydration source.
No. Mineral water can be still or sparkling. Sparkling mineral water is either naturally carbonated at the source (Gerolsteiner, Perrier, Vichy Catalan) or carbonated at bottling using CO₂ recovered from the source or added.
