SOMA SUSTAINABLE WATER FILTER REPLACEMENT WHITE SEALED
Lower concern. Activated carbon filter media is not a material linked to PFAS.
This replacement filter uses activated carbon filter media, likely coconut shell or bituminous coal base, with no water-repellent finish on record. The brand has no PFAS statement on record, and no third-party testing is available.
We flunk more products than we pass. This one earned its grade. How we grade
Material
activated carbon filter media (likely coconut shell or bituminous coal base)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What SOMA SUSTAINABLE WATER FILTER REPLACEMENT is made of, ingredients and materials
This replacement cartridge uses activated carbon (source material not publicly specified by Soma, likely coconut shell or coal-based) as the primary filtration medium. Activated carbon works by adsorption, trapping contaminants in its porous structure rather than releasing them into water. The sealed design minimizes air exposure before installation, reducing risk of microbial colonization during storage. No glazes, enamels, or plastic linings in direct water contact that would introduce lead, cadmium, or BPA concerns typical of ceramic or polycarbonate filters.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial growth and biofilm if cartridge is not replaced on schedule
Activated carbon filters that are not replaced promptly can become colonized by bacteria, especially in warm environments. Soma does not explicitly publish replacement guidance or maintenance protocols to mitigate this risk.
Contaminant rebound or desorption if water temperature spikes
Carbon filters can theoretically release previously adsorbed contaminants if water temperature rises significantly. Soma does not provide temperature operating range; typical faucet filters are rated for cold water only (below 40°C/104°F).
Incomplete disclosure of carbon source and activation methods
Unknown coal vs. coconut shell sourcing and activation chemistry (steam vs. chemical) could affect trace impurities. Lack of third-party testing limits verification of purity.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Activated carbon dust or fines migrating into drinking water
High-quality activated carbon cartridges are processed to minimize fines; no reported incidents with Soma filters. Risk is low if seal is intact before installation.
Housing material leachates (plastic or adhesives in filter assembly)
The cartridge body material is not disclosed by Soma. If plastic housing is used, BPA or other plasticizers are possible but not documented as tested or confirmed absent.
The full breakdown
The brand's record and disclosure
Soma has not published detailed material sourcing or third-party certification (NSF, WQA) for this specific cartridge. The brand markets sustainability but does not publicly disclose activated carbon origin, manufacturing standards, or PFAS removal claims. No recalls or contamination incidents on record for Soma filters. Marketing emphasizes environmental messaging but lacks technical depth on safety testing or composition.
How it compares in its category
Faucet-mounted carbon filters are among the lowest-risk water filtration products; they have no electrical components, heating elements, or complex plastic housings that degrade. Soma's cartridge is comparable to Brita and PUR alternatives in material class (activated carbon) but less transparent than brands offering NSF/WQA certification. Price and sustainability narrative are main differentiation, not safety profile.
If you buy it
Replace every 2 to 3 months depending on water usage and quality; delayed replacement can allow bacterial biofilm to colonize the cartridge. Inspect the seal before installation to confirm no visible damage or gaps. Store in a cool, dry place before use. Do not attempt to reactivate or rinse the cartridge with hot water, as carbon media can degrade. The housing itself (not evaluated here) should be checked for cracks or discoloration over time.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Soma has made none
Formulations change between production runs, so check the current label. How we grade.
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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.