Under-sink reverse osmosis · checked 16 Oct 2026
Aquasana SmartFlow Reverse Osmosis Water Filter
Model AQ-SFRO2 · replacement parts AQ-SFRO-S1S3, AQ-SFRO-S2, AQ-SFRO-REMIN
Lead:Brand says certifiedPFAS:Brand says certified
Each claim, checked
What the brand says, what a certification listing shows for this model, and where each fact comes from. We read listings; we do not test products.
- 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.
| Contaminant | Brand claim | Standard | Certifier | Confirmed? | Source, date checked |
|---|---|---|---|---|---|
| Lead | “also certified to reduce 99.99% of cysts, 99.9% of asbestos, 99% of lead, VOCs, and microplastics, and 96% of chlorine, chloramines, arsenic, pesticides, and herbicides” brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| PFOA | “The NSF/ANSI 53 certification is to the updated, stricter standard for more comprehensive protection against PFOA/PFOS.” brand source | NSF/ANSI 53 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| PFOS | Same statement as for PFOA. brand source | NSF/ANSI 53 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Fluoride | “certified by WQA to NSF/ANSI Standards 42, 53 (includes P473), 58, 401, and CSA B483.1 to effectively reduce 90 contaminants, including 90% of fluoride” brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Arsenic | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Chlorine | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Cysts (Giardia, Cryptosporidium) | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Asbestos | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| VOCs (volatile organic chemicals) | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Microplastics | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Chloramine | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Pesticides and herbicides | Same statement as for Lead. brand source | NSF/ANSI 42, 53 (includes P473), 58, 401, CSA B483.1 | WQA (named by brand) | Brand says certified — not found in IAPMO’s listing; check NSF | IAPMO searched · check NSF’s listingchecked 16 Oct 2026 |
| Nitrate | “One of the most effective water filtration methods to reduce fluoride. Also tackles nitrates, nitrites, lead, radium, and arsenic.” brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
| Nitrite | Same statement as for Nitrate. brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
| Radium | Same statement as for Nitrate. brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
| Total dissolved solids (TDS) | “Membrane TDS Reduction: 96.4%” brand source | – | – | Brand claim — no certification cited | brand pagechecked 16 Oct 2026 |
Filter changes, by the brand’s numbers
How often Aquasana says to replace each part. Real filter life depends on how much water you use and what is in it.
| Part | Brand says replace every | Changes a year | Source, date checked |
|---|---|---|---|
| Stage 1 carbon block and Stage 3 Claryum advanced carbon block (AQ-SFRO-S1S3) | 6 months or 250 gallons“Stage 1 (Carbon Block) and Stage 3 (Advanced Carbon Block) filter cartridges should be replaced every 6 months or up to 250 gallons.” | 2 | brand sourcechecked 16 Oct 2026 |
| Stage 2 SmartFlow RO membrane (AQ-SFRO-S2) | 12 months“Stage 2 (SmartFlow® Membrane) should be replaced every 12 months depending on usage and water quality.” | 1 | brand sourcechecked 16 Oct 2026 |
| Stage 4 remineralizer (AQ-SFRO-REMIN) | 6 months“Stage 4 (Remineralizer) should be replaced every 6 months depending on usage and water quality.” | 2 | brand sourcechecked 16 Oct 2026 |
Certification listings found
No IAPMO R&T listing matched this model when we searched on 16 Oct 2026.
Check it yourself
NSF’s and WQA’s terms don’t allow automated lookups, so these links open their public listings for this model:
- NSF listing search: AQ-SFRO2
- NSF listing search: AQ-SFRO-S1S3
- NSF listing search: AQ-SFRO-S2
- WQA listing search: AQ-SFRO2
- WQA listing search: AQ-SFRO-S1S3
- WQA listing search: AQ-SFRO-S2
- IAPMO R&T listing directory
What the brand says about certification
- “WQA tested and certified to NSF/ANSI Standards 42, 53 (includes P473), 58, 401, and CSA B483.1.” source checked 16 Oct 2026
- “WQA tested and certified to NSF/ANSI Standards 42, 53, 58, 401, and CSA B483.1 for the claims specified on the Performance Data Sheet.” source checked 16 Oct 2026
- “The SmartFlow® Reverse Osmosis boasts one of the highest certified contaminant removal rates of all reverse osmosis systems on the market.” source checked 16 Oct 2026
- “In fact, it’s certified to reduce 89 more contaminants than Amazon’s top-selling RO system is certified to reduce.*” source checked 16 Oct 2026
Performance data sheet (names WQA)