Observed arrival · 2026-10-08
Listed Water: ZIP-code water records and filter claims
Listed Water matches a ZIP code to the water systems serving it, shows EPA-recorded measurements, and lists filters with certifier-listed reduction claims for those contaminants.
- For
- U.S. households checking local tap-water records
- Worth noticing
- It reports matching 28,222 ZIP areas to water systems and checking 325 filter-reduction claims against certifier listings.
Field notes
Listed Water says it matches 28,222 ZIP areas to water-system service boundaries, while warning that one ZIP may map to several systems and asking users to confirm against a water bill. Its comparison uses dated EPA sample results alongside legal limits and health goals, then lists filters only where a certifier listing supports a reduction claim. The page reports 325 checked claims and says rankings are not paid placements.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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