Culligan · Countertop Filters
Culligan MaxClear Technology Gravity Countertop Water Filter System
Lower-concern gravity filter; no known PFAS red flags, but no PFAS testing disclosure either.
Culligan's MaxClear gravity countertop filter uses standard activated carbon and ion-exchange media, materials with lower PFAS contamination risk than non-stick coatings or water-repellent treatments. The brand does not publicly claim PFAS-free status or provide third-party testing.
Shop Culligan on Amazon →Material
Activated carbon, ion exchange resin, 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 MaxClear uses activated carbon and ion-exchange resin as the primary filtration media, housed in food-grade polypropylene. Activated carbon is inert and does not leach; ion-exchange resins (typically styrene-divinylbenzene polymers) are chemically stable when properly formulated and do not release monomers into water at neutral pH. Polypropylene housing is chemically resistant to cold water and does not migrate BPA or phthalates under normal use conditions. The gravity (non-pressurized) design eliminates mechanical stress that could accelerate polymer degradation.
The brand's record and disclosure
Culligan is a large, established water-treatment company with NSF/ANSI certification claims on many products, though specific third-party certification status of this model should be verified on the product packaging or their website. The company does not publicly disclose PFAS testing data or remediation protocols for this gravity filter line, which is typical for consumer-grade filters but leaves uncertainty about influent PFAS screening. No major recalls or leaching incidents on record for this specific product or Culligan's gravity filter line.
How it compares in its category
Gravity countertop filters are among the lowest-risk filtration categories because they avoid pressurized plastic components and do not require electrical connections or heating. This model sits in the mid-to-standard tier of the gravity-filter market; it offers no special antimicrobial housing coating or specialty media claimed over typical Brita or Aquaphor designs. The polypropylene housing is standard across competitors; main differentiation is cartridge longevity and mineral-removal claims rather than material safety.
If you buy it
Replace the cartridge every 2-3 months or per manufacturer guidance to prevent bacterial biofilm accumulation inside depleted media; do not allow standing water in the unit for more than 48 hours. The filter is not rated for hot water; store and use only with cold tap water. Empty and rinse the housing weekly if used in warm environments (above 75F) to reduce algae or mold risk in the collection chamber. Do not attempt to clean or recharge the cartridge; disposable replacement is required for safety.
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 growth in filter media and housing
All gravity filters rely on user maintenance; if cartridges are not replaced on schedule or the unit sits unused for extended periods, saprophytic bacteria (non-pathogenic but taste/odor forming) and rarely pathogenic organisms can colonize exhausted carbon. Polypropylene housing itself does not harbor pathogens but provides no antimicrobial barrier.
Polypropylene housing leachables (cold water only)
Polypropylene is chemically stable in cold water and does not release BPA, phthalates, or other endocrine disruptors under normal use. No documented incidents of leaching from Culligan gravity filter housings in the public record.
Ion-exchange resin breakdown or migration
High-quality ion-exchange resins used in certified filters do not break down or leach resin particles or monomers into treated water at neutral pH. The polypropylene housing and media containment screen prevent macro-particle escape. No recalls or complaints on record for this product line.
Activated carbon dust or fines in filtered water
New or recently replaced cartridges may release fine carbon particles for the first few uses; rinsing or discarding the first 1-2 pitchers of water after cartridge replacement is a common precaution. This is cosmetic and non-toxic but can affect taste and appearance.
Chlorine or chloramine taste/odor breakthrough
Activated carbon in gravity filters does not remove chloramine as effectively as chlorine; once carbon is exhausted, chloramine and some disinfection byproducts may pass through. This is a performance issue rather than a safety risk at municipal water levels, but signals that cartridge replacement is overdue.
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 Countertop Filters
ZeroWater
40-Cup Glass Water Filter Dispenser
borosilicate glass, plastic pitcher housing, ion-exchange resin cartridge
Lower concern on PFAS, but brand silence on cartridge composition is a missed transparency opportunity.
✓Bare metal or glass, no coating at all
ZeroWater
Culligan ZeroWater Technology 22-Cup Ready Water Filtration Dispenser
Plastic housing, activated carbon + ion-exchange resin filter media
Lower concern, but verify filter cartridge specs before relying on PFAS claims.
✓Brand claims PFAS-free (unverified)
LARQ
PureVis Pitcher
Borosilicate glass pitcher, activated carbon filter cartridge
Lower PFAS concern for the pitcher itself; verify filter cartridge sourcing if purchasing replacements.
✓Bare metal or glass, no coating at all
More countertop 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.