# h2oMatch

> h2oMatch helps users understand, compare, and choose mineral waters using official label data — sodium, calcium, magnesium, bicarbonate, and fixed residue. All values come directly from product labels, with no estimates.

## Core Tools

- [Water Calculator](https://h2omatch.com/water-calculator): Find mineral waters that match your selected mineral preferences (low sodium, high magnesium, etc.) by country.

- [Compare Waters](https://h2omatch.com/compare-waters): Compare two or three mineral waters side by side using official label data.

- [Top 5 h2oMatch Waters](https://h2omatch.com/top-waters): Personalized ranking of the best-matching mineral waters based on the user's profile.

## Learn — Minerals Explained

- [Sodium in Mineral Water](https://h2omatch.com/learn/sodium-in-mineral-water): What sodium means on a water label and which waters are low or high.

- [Calcium in Mineral Water](https://h2omatch.com/learn/calcium-in-mineral-water): How calcium content varies and which waters are richest.

- [Magnesium in Mineral Water](https://h2omatch.com/learn/magnesium-in-mineral-water): Why magnesium matters and where to find magnesium-rich waters.

- [Bicarbonate in Mineral Water](https://h2omatch.com/learn/bicarbonate-in-mineral-water): The role of bicarbonate and its typical ranges.

- [Nitrates in Mineral Water](https://h2omatch.com/learn/nitrates-in-mineral-water): Nitrate limits, safety, and what to look for on a label.

- [Fixed Residue](https://h2omatch.com/learn/fixed-residue-mineral-water): What total mineralization means and how to read it.

- [Other Minerals](https://h2omatch.com/learn/other-minerals-in-mineral-water): Potassium, sulfates, chlorides, and other label values.

## Learn — How Water Works

- [How to Read a Water Label](https://h2omatch.com/learn/how-to-read-water-label): A practical guide to interpreting mineral water labels.

- [Why Mineral Waters Differ](https://h2omatch.com/learn/why-mineral-waters-differ): Why composition varies so much across brands and regions.

- [Types of Drinking Water](https://h2omatch.com/learn/types-of-drinking-water): The categories — natural mineral, spring, table, and tap water.

- [Mineral Water Regulation EU](https://h2omatch.com/learn/mineral-water-regulation-eu): How the EU regulates natural mineral water.

## Learn — Taste & Types

- [How Mineral Content Affects Taste](https://h2omatch.com/learn/how-mineral-content-affects-taste): Which minerals shape taste and how.

- [Still vs Sparkling](https://h2omatch.com/learn/still-vs-sparkling-mineral-water): The difference between still, lightly sparkling, and sparkling waters.

- [How Much Water Per Day](https://h2omatch.com/learn/how-much-water-per-day): Daily intake guidance and what affects it.

## Learn — Water & Wellbeing

- [Mineral Water and Blood Pressure](https://h2omatch.com/learn/mineral-water-blood-pressure): How sodium and other minerals relate to blood pressure.

- [Mineral Water and Bone Health](https://h2omatch.com/learn/mineral-water-bone-health): Calcium and magnesium for bone health.

- [Mineral Water in Pregnancy](https://h2omatch.com/learn/mineral-water-pregnancy): Considerations during pregnancy.

## Learn — Brand Comparisons

- [Levissima vs San Benedetto](https://h2omatch.com/learn/levissima-vs-san-benedetto): Italy's two leading low-mineralization still waters compared by sodium, calcium and magnesium.

- [Ferrarelle vs San Pellegrino](https://h2omatch.com/learn/ferrarelle-vs-san-pellegrino): Two iconic Italian sparkling waters with very different bicarbonate and magnesium profiles.

- [San Pellegrino vs Perrier](https://h2omatch.com/learn/san-pellegrino-vs-perrier): How the two best-known sparkling waters in the world compare on minerals and sodium.

- [Evian vs Fiji](https://h2omatch.com/learn/evian-vs-fiji): French Alps versus Fijian volcanic source — two distinctive still waters side by side.

- [Aqua Carpatica vs Borsec](https://h2omatch.com/learn/aqua-carpatica-vs-borsec): Romania's flagship Carpathian still waters: ultra-low sodium against richer magnesium.

## Learn — How the Tools Work

- [How the Water Calculator Works](https://h2omatch.com/learn/how-water-calculator-works): The logic behind the Water Calculator.

- [How the Compare Waters Tool Works](https://h2omatch.com/learn/how-compare-waters-works): What you can compare and how.

- [How the h2oMatch Score Works](https://h2omatch.com/learn/how-h2omatch-score-works): How the h2oMatch Score evaluates fit between user profile and water composition.

## Explore by Mineral Profile

- [Low Sodium Waters](https://h2omatch.com/explore/low-sodium): Mineral waters with the lowest sodium content.

- [High Magnesium Waters](https://h2omatch.com/explore/high-magnesium): Mineral waters richest in magnesium.

- [High Calcium Waters](https://h2omatch.com/explore/high-calcium): Mineral waters with the highest calcium content.

- [Light Mineral Waters](https://h2omatch.com/explore/light-waters): Waters with the lowest total mineralization.

## Explore by Country

Country-specific mineral water rankings (low sodium, high magnesium, high calcium, light) are available for: Italy, Germany, France, Romania, Spain, United Kingdom, Switzerland, Austria, and the United States. Browse them all from the [Explore hub](https://h2omatch.com/explore).

## Other Pages

- [Best Mineral Water](https://h2omatch.com/best-mineral-water): Editorial overview of top mineral waters across categories.

- [About h2oMatch](https://h2omatch.com/about): About the project, methodology, and data sources.