Soma · Faucet Water Filters
Soma Replacement Filter
Lower-concern replacement filter; carbon media itself has minimal PFAS risk, but brand makes no transparency statement.
Soma replacement filters use activated coconut-shell carbon, a commonly safe filtration material without known Teflon-family coating coatings. The brand provides no public disclosure about PFAS testing or sourcing, which is typical for this product category but limits assurance.
Shop Soma on Amazon →Material
Activated coconut-shell carbon (primary filtration media)
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
Soma replacement filters use activated coconut-shell carbon as the primary filtration medium. This material is thermally processed plant-derived carbon with a porous structure designed to trap dissolved contaminants (chlorine, some pesticides, odor compounds) via adsorption. Coconut-shell carbon does not leach heavy metals, BPA, or synthetic resins into water under normal cold-water faucet conditions, making it chemically inert in this application.
The brand's record and disclosure
Soma is a water-filtration brand owned by Nestlé Waters and has no documented product recalls or safety violations in the filtration space. However, the brand has not published third-party testing reports or specific claims about PFAS reduction capability, nor does it provide transparency statements about manufacturing practices or media sourcing. This silence is not unusual in the category but falls short of best-in-class disclosure seen from competitors like Brita and PUR.
How it compares in its category
Faucet-mount filters like Soma occupy a middle tier of convenience and cost between pitcher filters (lower) and under-sink carbon systems (higher complexity). Soma's coconut-shell carbon is comparable in safety profile to other major brands; the category itself carries minimal leaching risk because these filters sit above the tap and contact water at ambient temperature. No faucet-mount filter brand certifies PFAS removal, though some carbon media can passively adsorb PFOA/PFOS to minor degrees.
If you buy it
Replace the filter every 2-3 months or per package guidance to prevent bacterial biofilm buildup inside the cartridge housing and loss of filtration efficiency. Do not use this filter with hot water, as it will degrade faster and may allow fine carbon particles to escape. Store replacement filters in a cool, dry place; do not store the used filter in the refrigerator. Rinse the filter head with cold tap water monthly to clear debris accumulation.
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.”
Bacterial colonization in filter housing
If the filter is not replaced on schedule or left unused for extended periods, standing water inside the porous carbon bed can harbor bacterial growth. This is a maintenance issue, not a material defect, and is controlled by timely replacement.
Fine carbon particle shedding
Activated carbon can shed microscopic particles, especially during initial use or if water pressure spikes. Rinsing the filter before first use and monitoring for black specks in dispensed water mitigates this risk; shedding is not toxic but is cosmetically undesirable.
Housing material leaching
Soma filter housings are typically polystyrene or ABS plastic designed for cold water only. No established leaching of BPA, phthalates, or other endocrine disruptors has been reported for this product under normal use conditions.
Inadequate reduction of unregulated contaminants
Coconut-shell carbon is effective for chlorine and some volatile organic compounds but does not reliably reduce hard minerals, fluoride, nitrates, or PFAS at levels comparable to reverse-osmosis systems. Buyer expectations should align with the filter's mid-tier capability.
Ineffective filtration after saturation
Once the carbon media is saturated, contaminants pass through unfiltered. Standard replacement intervals (2-3 months) are estimates and vary by water quality; over-extension can result in reduced safety benefit.
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.