Evidence · method · accountability
Trust the data. Understand the method.
PurityMap translates public water records without hiding their age, scope, uncertainty, or source. This hub shows the rules behind every report, ranking, explanation, and recommendation.
The publication promise
Unknown remains unknown.Missing evidence is never presented as a non-detect, a favorable score, or a reason to recommend a product.
From public record to water intelligence
The chain is explicit so readers can distinguish the source, the structured finding, PurityMap’s interpretation, and any later action.
- 01
Source
A dated public record from a utility, regulator, or recognized public-data program.
- 02
Structure
Publisher, place, supplier, sample date, units, qualifiers, and limits remain attached.
- 03
Validate
Incomplete or contradictory records stay visible as evidence gaps instead of becoming favorable results.
- 04
Interpret
Published findings are compared only with their stated regulatory or health benchmark.
- 05
Connect
Explanations, treatment capabilities, products, and editorial context link back to the underlying record.
Trust center
How we analyze water
Finding states, scoring boundaries, recommendation rules, publication rules, and version history.
Open this standardData sources
The public records PurityMap uses, what each source contributes, and the limitations that travel with it.
Open this standardData integrity
How source evidence moves through ingestion, normalization, validation, assessment, and publication.
Open this standardGovernance and editorial policy
Versioning, review, evidence preservation, corrections, and the separation of facts from interpretation.
Open this standardCommercial independence
Why recommendation eligibility is determined before an affiliate offer is attached.
Open this standardCorrections and verification
Submit a discrepancy or inspect how a claim moves from evidence to review and status.
Open this standardPublic-system evidence has physical limits.
Published records can lag, private wells may be outside the dataset, service boundaries can cross ZIP codes, and premise plumbing can change water after it enters a property.
Accountability in practice
See a discrepancy?
Identify the page, explain the issue, and attach the public evidence that should be reviewed.
Submit a correction →Represent a utility?
Submit the system identifier, claim, and supporting evidence for a governed review.
Request utility verification →