Water filters and softeners: which claims are certified
97 popular products. For each one we read the brand’s own claims and searched IAPMO R&T’s public listing directory on 16 Oct 2026. NSF and WQA listings are linked on every product page for you to check.
- Certified (listing checked)The certifier’s public listing shows this claim for this model.
- Brand says certifiedThe brand says certified; IAPMO’s listing does not show it. NSF can be checked by hand.
- Brand claim onlyThe brand claims it without citing a certification.
Pitcher filter
Countertop dispenser
| Product | Lead | PFAS |
|---|---|---|
| Aquasana Clean Water MachineAQ-CWM2-B | Brand says certified | Brand says certified |
| Berkey Big Berkey System with 2 Black Berkey ElementsBK4X2-BB | Brand claim only | Brand claim only |
| Culligan Scout 2.25 Gallon Gravity Countertop System with MaxClear…MCSP | Certified (listing checked) | Certified (listing checked) |
Faucet-mount filter
| Product | Lead | PFAS |
|---|---|---|
| Brita Elite Advanced Water Filter Faucet System with Brita…FF-100 | Brand says certified | not claimed |
| Culligan Faucet Mount Water FilterCULFMWH | Brand claim only | Brand claim only |
| PUR PLUS Faucet Filtration System – Horizontal, ChromePFM400H | Certified (listing checked) | Certified (listing checked) |
| PUR Faucet Filtration System, VerticalFM-3333B | Certified (listing checked) | Certified (listing checked) |
| Waterdrop Sink Filter Water Faucet for Skin Care, Bathroom Faucet…WD-FC-02P | not claimed | not claimed |
Countertop filter
| Product | Lead | PFAS |
|---|---|---|
| Brita Hub Countertop Water Filter System with Brita Hub Filter87340 | Brand says certified | not claimed |
Countertop reverse osmosis
| Product | Lead | PFAS |
|---|---|---|
| APEC Water Portable Alkaline Mineral 90 GPD Countertop Reverse…RO-CTOP-PHC | Brand claim only | Brand claim only |
| AquaTru Classic Countertop Reverse Osmosis Water PurifierAT2000 | Certified (listing checked) | Certified (listing checked) |
| Waterdrop Instant Hot Countertop RO System - Waterdrop K19-HWD-K19-H | Brand claim only | not claimed |
Under-sink filter
| Product | Lead | PFAS |
|---|---|---|
| Aquasana Claryum 2-Stage Under Sink Water FilterAQ-6200 | Brand says certified | Brand says certified |
| Aquasana Claryum 3-Stage Under Sink Water FilterAQ-6300 | Brand says certified | Brand says certified |
| Aquasana Claryum 3-Stage Max Flow Under Sink Water FilterAQ-6300M | Brand says certified | Brand says certified |
| Aquasana Claryum Direct Connect Under Sink Water FilterAQ-MF-1 | Certified (listing checked) | Certified (listing checked) |
| Culligan EZ-Change Under Sink Drinking Water Filtration SystemUS-EZ-4 | Certified (listing checked) | Certified (listing checked) |
| iSpring US31 Water Filtration System for Drinking, NSF Certified…US31 | not claimed | Brand claim only |
| iSpring CU-A4 0.01μm Ultra-Filtration Under Sink Water Filter…CU-A4 | Brand claim only | Brand claim only |
| Waterdrop Under Sink Water Filter | Direct Connect Filtration SystemWD-10UA | not claimed | not claimed |
| Waterdrop 6-stage Under Sink Ultrafiltration Stainless Steel Water…WD-TST-UF | not claimed | not claimed |
Under-sink reverse osmosis
Whole-house filter
Whole-house well-water system
| Product | Lead | PFAS |
|---|---|---|
| Aquasana Rhino Well Water with UV Whole House Water FilterWH-WELL-UVS | not claimed | not claimed |
| Home Master HMF3SdgFeC 3-Stage Whole House Multi Gradient Sediment,…HMF3SdgFeC | not claimed | not claimed |
| SpringWell Whole House Well Water Filter SystemWS1 | not claimed | not claimed |
Water softener (salt)
Salt-free conditioner
| Product | Lead | PFAS |
|---|---|---|
| A. O. Smith Whole House Multifunction DescalerAO-WH-DSCLR | not claimed | not claimed |
| APEC Water FUTURA-10 Salt-Free Anti-Scale Water ConditionerFUTURA-10 | not claimed | not claimed |
| Aquasana Salt-Free Water ConditionerWH-SFWC-S | not claimed | not claimed |
| Filtersmart Salt-Free Water Softener Alternative System, Saltless…FS500 | not claimed | not claimed |
| HALO Water Systems HALO 5 Whole House Water Filtration & ConditioningH5-100 | not claimed | not claimed |
| NuvoH2O Home Water SoftenerDPHB | not claimed | not claimed |
| SpringWell FutureSoft Salt-Free Water ConditionerFS1 | not claimed | not claimed |
| Watts OneFlow Residential Anti-Scale System, 12 GPM with Smart…OFRES-0935-K | not claimed | not claimed |
Electronic descaler
| Product | Lead | PFAS |
|---|---|---|
| Eddy Electronic Water Descaler | not claimed | not claimed |
| iSpring ED2000 Whole House Water Descaler, Alternative Electronic…ED2000 | not claimed | not claimed |
| YARNA CWD24 Water DescalerCWD24 | not claimed | not claimed |