We hold ourselves to the same transparency standards we apply to the brands we score. Our full scoring methodology — including every formula, every scientific reference, and every weighting decision — is published openly on this site. If you disagree with an approach, or think we've got something wrong, we want to hear it.

Science is not static. As new research emerges — on PFAS, on microplastics, on the health effects of specific minerals — we update the methodology and recalculate affected scores. Every significant change is documented.

Water is the one thing every person on earth consumes every single day, often multiple times a day, for their entire life. The cumulative effect of that exposure — to minerals, to contaminants, to plastics, to disinfection byproducts — is not trivial.

The science on this is clear and growing: the quality of your water matters for cardiovascular health, cognitive function, dental health, endocrine function, and cancer risk.

And yet most people have never once looked at a water quality report.

We want to change that. Not by alarming people, but by making the information accessible, understandable, and actionable. A score out of 100. A plain-English explanation. A source for every claim.