Gerolsteiner vs Perrier

Gerolsteiner carries roughly 19× the magnesium of Perrier (104 vs 5.4 mg/L). Overall minerality isn't close: 2,500 mg/L TDS for Gerolsteiner against 468 for Perrier — different categories of water, not just different brands. At the register, Perrier is about 40% cheaper per liter ($2.00/L vs $3.33/L).

MeasureGerolsteinerPerrier
TDS (mg/L)2,500468
pH65.8
Calcium (mg/L)346152
Magnesium (mg/L)1045.4
Sodium (mg/L)1169.6
Potassium (mg/L)110.5
Bicarbonate (mg/L)1,808432
Sulfate (mg/L)3829
Chloride (mg/L)4020
Silica (mg/L)Not disclosedNot disclosed
Price per liter$3.33/L$2.00/L

Bold marks the higher value — higher is a fact, not a verdict; the right water depends on what you want it for. Values are label- or report-derived and approximate.

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