with MaxClear Technology 3 gallon gravity water filter system vs 40-Cup Glass Water Filter Dispenser: which is safer?
ZeroWater 40-Cup Glass Water Filter Dispenser is our pick: better on PFAS and on the overall hazard picture.
Culligan
with MaxClear Technology 3 gallon gravity water filter system
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBacterial and mold growth in reservoir
PossibleFilter media saturation and contaminant breakthrough
Our pick
ZeroWater
40-Cup Glass Water Filter Dispenser
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleIon-exchange resin cartridge composition opacity
PossibleBacterial or mold growth in housing and spigot
PossiblePolypropylene plastic durability and UV exposure
Where these two actually differ
- We flag Bacterial and mold growth in reservoir and Filter media saturation and contaminant breakthrough on the Culligan and not on the ZeroWater.
- We flag Ion-exchange resin cartridge composition opacity, Bacterial or mold growth in housing and spigot and Polypropylene plastic durability and UV exposure on the ZeroWater and not on the Culligan.
- The Culligan is Plastic housing, carbon/ion-exchange filter media where the ZeroWater is borosilicate glass, plastic pitcher housing, ion-exchange resin cartridge, which is most of the difference in these two grades.
- These two are 5 points apart, close enough that price and fit should decide it rather than our grade.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More countertop filters: see the full ranking