Culligan · Countertop Filters
Culligan MaxClear Gravity Water Filter System
Lower-concern gravity filter; no PFAS disclosure, but standard carbon/PP construction carries minimal risk.
The Culligan MaxClear uses activated carbon filtration with polypropylene components, materials not inherently associated with PFAS. Culligan makes no public PFAS claims.
Shop Culligan on Amazon →Material
Activated carbon filter cartridge, 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 cartridges (coconut or bituminous coal-based) housed in food-grade polypropylene (PP) plastic. Activated carbon is inert and does not degrade or leach into water under normal gravity-fed, room-temperature conditions. Polypropylene housing is chemically stable at cold water temperatures and does not require concerns about BPA or phthalate migration in this application, since gravity filters do not expose PP to heat or acidic/oily substances that would accelerate leaching.
The brand's record and disclosure
Culligan is a long-established water filtration company with no publicly documented recalls or leaching incidents for the MaxClear gravity line. The brand does not prominently disclose PFAS test results for this product, which is typical of gravity-filter manufacturers; silence on PFAS is not unusual in this category and does not indicate a known problem. No third-party certifications (NSF, WQA) are standard for gravity filters, but the product is widely distributed and poses no known regulatory violations.
How it compares in its category
Gravity filters like this are among the lowest-risk water treatment options because they operate passively (no electric pump or heated elements) and require only periodic cartridge replacement. Compared to pitcher filters, the MaxClear has a larger capacity and longer cartridge life. Compared to pitcher filters with problematic materials (some older brands used BPA-containing housings), Culligan's PP construction is now standard and safer; compared to pitcher filters with superior filtration (e.g., multi-stage or reverse osmosis), this gravity model offers simpler maintenance and lower cost at the trade-off of slower flow rate.
If you buy it
Replace cartridges every 6-12 months or after 100 gallons, whichever comes first, to prevent bacterial biofilm growth in spent carbon. Store the assembled unit in a cool, dark place away from direct sunlight to slow algae growth in the housing. Do not refill with hot water; gravity filters are designed for cold water only. If the housing becomes discolored or smells musty after 2-3 years of use, consider replacing it, as old PP can develop microcracks that harbor bacteria, though this is a maintenance issue rather than a chemical hazard.
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 or biofilm growth in filter cartridge or housing
Gravity filters with standing water and porous carbon can develop bacteria or mold if cartridges are not replaced regularly or if the unit is stored in warm, humid conditions. This is a microbial contamination risk, not a chemical one, but is the primary non-chemical hazard for this product type.
Leaching from polypropylene housing
No documented incidents of BPA, phthalates, or other plasticizers leaching from Culligan MaxClear PP housings under normal cold-water gravity filtration. PP is chemically inert at room temperature and does not leach into non-heated, non-acidic water.
Activated carbon dust or particle release
New or damaged cartridges can shed fine activated carbon particles into water, particularly in the first fill cycle. This is cosmetic (black water) rather than toxic, but can be minimized by rinsing the cartridge and running the first 1-2 gallons through before drinking.
Housing degradation or cracking with age
Polypropylene can become brittle and develop hairline cracks after 3-5 years of UV exposure or temperature cycling, even if not used. This does not cause chemical leaching but may allow unfiltered water bypass or algae colonization of the interior.
Filter media effectiveness decline
Activated carbon does not degrade chemically during normal use; however, saturation (reaching adsorption capacity) means contaminant removal declines after 6-12 months. This is not a safety hazard but a performance issue, the filter still provides some mechanical filtration but no longer actively removes volatile organic compounds or chlorine.
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.