Observed arrival · 2026-10-25
What Filter Removes: water-filter claims, checked
A comparison resource for US water filters, mapping certified contaminant reductions and estimated household costs.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- US households comparing water filters
- Worth noticing
- The site distinguishes certifier listings from brand lab tests; it reports that 44% of checked reduction claims lacked a certifier listing.
Field notes
Visitors can browse by contaminant or filter type, then compare first-year totals; the cost calculator also accounts for replacement filters, reverse-osmosis drain water, household size, and cost per gallon. The catalog includes discontinued models alongside current products, making status part of the comparison rather than hiding older entries. Its methodology links to certifier listings and separates those listings from claims described as “tested to NSF standards.”
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue