7-Cup Water Filter Pitcher, NSF Certified vs Culligan 12-Cup Water Filter Pitcher with ZeroWater Technology: which is safer?

Where these two actually differ

• We flag Bacterial growth in filter housing if cartridge not replaced on schedule, Filter cartridge cross-contamination during installation and Incomplete contaminant removal (limitation of design, not a hazard per se) on the Aqua Crest and not on the ZeroWater.
• We flag Bacterial growth in reservoir if filter unmaintained or water stored too long, Filter cartridge degradation and particle escape if overfilled or misseated and Ion-exchange resin saturation without visible warning on the ZeroWater and not on the Aqua Crest.
• The Aqua Crest is Plastic pitcher with activated carbon filter cartridge where the ZeroWater is Activated carbon and ion-exchange resin filter media, which is most of the difference in these two grades.
• These two are level, close enough that price and fit should decide it rather than our grade.