Spotting unreliable water safety claims
How to read a potability claim, and which marketing phrases carry no verifiable meaning.
Claims that mean something
A meaningful claim identifies the laboratory or authority that issued the result, the date the sample was taken, what was tested for, and the standard it was compared against. It can be checked.
Claims that mean little on their own
Phrases such as "purified", "mineral", "alkaline", "premium", "ionised" or "100% safe" describe a product category or a marketing position, not a test result. A photograph of a certificate on a wall is not a current test result either. Certificates have dates, and a certificate from four years ago describes water from four years ago.
Be particularly careful with claims that a treatment removes "all contaminants". No single household method does. Boiling handles organisms but not chemicals. Most filters target a specific list of contaminants and say so in their documentation. Ultraviolet treatment inactivates organisms but does not remove chemicals or sediment, and it needs clear water and working power to function.
Health claims
Treat claims that water cures illness, changes the body's pH, or prevents disease as unsupported. Drinking water needs to be safe and adequate. Beyond that, extraordinary health claims about particular water products do not have the evidence behind them.
If a claim looks wrong
If a listing on this platform shows a water quality claim you believe is unsupported, use the report function on that listing. Reports go to moderators, who can ask the provider for the underlying evidence or suspend the listing while it is checked.
Sources
This guidance is general information, not medical or engineering advice for your specific situation. Boiling does not remove chemical contamination, and no single household treatment method handles every contaminant. Follow instructions from your local health office and water utility.