Water-filter claims need receipts.
Filter Report exists for buyers who do not want to decode NSF, WQA, IAPMO, PFAS, lead, TDS, and replacement-filter claims from scratch.
Filter Report Research Desk
Certification and ownership-cost review desk
Filter Report is an independent Ridgenotch Network publication that audits water-filter claims against certifier listings, official performance data, replacement-filter economics, and buyer constraints. The site is a source-audit resource, not a lab or public-health authority.
Why This Site Exists
Water-filter listings are crowded with impressive contaminant lists and percentage claims. The useful question is narrower: which exact model and cartridge is certified, tested, or merely claimed to reduce the contaminant you care about?
Filter Report starts with the buyer's water concern or installation constraint, then works back to standards, certifier listings, performance data, and replacement cost.
What We Pay Attention To
- Exact model and replacement-element matching
- NSF, WQA, IAPMO, and performance-data evidence levels
- Lead, PFAS-related, RO, taste, and renter decision paths
- Replacement-filter cost, service cycle, and compatibility risks
Editorial Guardrails
No paid ranking slots
Affiliate links do not buy position.
Evidence tiers stay visible
Certified, tested, claimed, and pending are not blended together.
Safety limits are explicit
A product review is not a water test or public-health directive.
Recommendations can move
Certification drift, price, or replacement availability can change the shortlist.
Affiliate Disclosure
Filter Report earns from qualifying purchases through Amazon Associates links. It costs you nothing extra. Rankings are based on evidence strength, buyer fit, maintenance economics, installation friction, and claim restraint.
Get in Touch
Found a certification listing that changed, a product that belongs in the receipt ledger, or a replacement cartridge that needs a separate check?