- Every number has a source. Each mineral value traces back to a published analysis. That means the producer’s label or certificate, an accredited lab report, or an official register, and every water page links straight to that document, not to us.
- Never invented. Only verified waters can win a match; the rest stay marked unverified and sit the contest out. When a value isn’t published, and with silica that is common, the page says “not published”. We never estimate or average one in. Better a gap than a guess.
- Corrected in the open. When a widely repeated number turns out to be wrong, we fix it in public and show the source. Oslo’s magnesium was circulating at six times the real value; the lab report says 0.4 mg/L, so 0.4 mg/L is what we print.
Methodology
Where the numbers come from.
The catalog is the product, so this page is the receipt.