Is your water filter actually NSF certified?
Enter your filter brand and model to see exactly which contaminants it is independently certified to remove — and which ones the brand advertises but never tested. We surface NSF, IAPMO, and WQA listings SKU by SKU, no marketing spin.
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Verify by brand
Browse certifications by brand to see which SKUs hold which NSF, IAPMO, or WQA standards.
Check by contaminant
Search by the contaminant you care about — lead, PFAS, chromium-6 — and find filters certified to remove it.
Decode marketing language
Learn the 15 patterns of misleading certification claims, from 'NSF-tested' to 'certified components only'.
TapWaterData is independent and not affiliated with NSF International, IAPMO, or WQA.
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