Observed arrival · 2026-10-21
Verified Filter checks tap-water findings against filter certifications
Enter a ZIP code to see reported water findings for covered U.S. systems and filters whose certification listings cover the relevant claims.
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- For
- U.S. residents checking utility water and filter claims
- Worth noticing
- Its three labels distinguish a certifier listing checked from brand claims that are not confirmed there.
Field notes
The site says its water-system coverage is limited to the 50 largest U.S. systems; people outside that list are directed to their own utility's report. Its filter listings distinguish an IAPMO listing that confirms a claim from a brand assertion that the listing does not show, or a claim without a cited certification. Verified Filter says it checks public records and certification listings rather than testing products.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
◎NicheUnusually specific use
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