Aquasana · Faucet Water Filters
Aquasana SmartFlow Reverse Osmosis Water Filter System
Lower-concern product; RO filters themselves are PFAS-free, but brand lacks transparency on housing materials.
Reverse osmosis systems like Aquasana's use non-Teflon-family coating membranes and carbon pre-filters, which present lower PFAS risk compared to treated apparel or cookware. The plastic housing is typically PP/PE, materials not inherently tied to PFAS.
Shop Aquasana on Amazon →Material
Reverse osmosis membrane, activated carbon, polyethylene/polypropylene housing
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
The Aquasana SmartFlow uses a reverse osmosis (RO) membrane paired with activated carbon pre-filters, both chemically stable materials that do not leach contaminants into water under normal pressure and temperature conditions. The housing is polyethylene or polypropylene plastic, which are food-contact approved resins with no established leaching of BPA, BPS, or phthalates when used at room temperature and not heated. The RO membrane itself removes contaminants by physical filtration, not chemical reaction, so degradation products are not a toxicological concern during typical residential use.
The brand's record and disclosure
Aquasana does not publicly disclose material sourcing, PFAS testing, or third-party certification for this filter system's housing or membrane materials. The brand has not issued statements about PFAS-free construction or leachate testing. No major recalls or safety controversies are on record for this product line, but the absence of transparency on housing polymer composition and manufacturing is a gap relative to more disclosure-forward competitors.
How it compares in its category
Most faucet-mounted RO filters share identical core chemistry (RO membrane, carbon), so material safety profiles are broadly equivalent across brands. Aquasana's main differentiator is filter longevity and flow rate, not material risk reduction. Competitors like Waterdrop and iSpring offer similar housing materials with similarly sparse PFAS disclosure, making this product neither ahead nor behind on chemical transparency.
If you buy it
Replace the RO membrane and pre-filters on the manufacturer's recommended schedule (typically 6-12 months depending on water quality and flow) to prevent bacterial biofilm growth inside spent cartridges. Do not heat the system or expose the housing to direct sunlight, which can accelerate plastic degradation over many years. Store replacement cartridges in a cool, dry place. If you notice discoloration, odor, or sediment in filtered water, replace the cartridge immediately rather than attempting to clean it.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Polyethylene/polypropylene housing leaching
Food-grade polyethylene and polypropylene do not leach BPA, phthalates, or other endocrine disruptors at room temperature under non-pressurized storage conditions; no leachate data is published for this specific housing, but material class is considered safe for potable water contact by FDA and EU regulations.
Activated carbon dust or particulate ingestion
New activated carbon cartridges may release fine black powder or dust if not pre-rinsed; users should flush the system for 5-10 minutes before first use to clear loose carbon particles, though ingested carbon is not toxic.
Bacterial biofilm in unmaintained cartridges
RO systems that are not used regularly or whose cartridges are not replaced on schedule can develop bacterial growth inside the membrane chamber; this is a hygiene concern, not a chemical one, and is standard to all RO filters if maintenance intervals are missed.
Membrane integrity failure
Reverse osmosis membranes can crack or develop pin-holes if subjected to freezing, pressure shock, or very high water pressure; a failed membrane will not filter contaminants but will not release membrane material into water, only a loss of function.
Heavy metals in source water bypass (not product fault)
The RO membrane itself is designed to reject dissolved minerals and contaminants; no leaching of filter media into the filtered water has been documented for this product, and the membrane does not use metal-containing compounds.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Faucet Water Filters
Aquasana
Under Sink Water Filter 2-Stage Filtration Reduces up to 99.99% of Pfas
Activated carbon, ion exchange resin cartridges
Lower-concern filter type, but claim lacks third-party lab proof, verify independently before relying on it.
✓Brand claims PFAS-free (unverified)
Waterdrop
Sink Filter
activated carbon filter media, stainless steel housing
Lower-concern filter type, but brand makes no PFAS transparency claim, verify cartridge materials directly before purchase.
✓Bare metal or glass, no coating at all
Waterdrop
Filtered Water Faucet
stainless steel faucet body; activated carbon/ion-exchange filter cartridge
Lower-concern choice; water filter design avoids high-risk PFAS applications, but brand transparency on materials could be stronger.
✓Bare metal or glass, no coating at all
More faucet water filters grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.