APEC Portable Countertop Reverse Osmosis Drinking Water System with Case RO-CTOP-C vs Culligan ZeroWater Technology 22-Cup Ready Water Filtration Dispenser: which is safer?

APEC Portable Countertop Reverse Osmosis Drinking Water System with Case RO-CTOP-C is our pick: better on PFAS and on the overall hazard picture.

Our pick

APEC Water Systems

APEC Portable Countertop Reverse Osmosis Drinking Water System with Case RO-CTOP-C

PFAS grade

A 100/100

Overall grade

A 96/100

Verdict

Buy

Hazard flags

⚑ 1

Material

RO membrane, carbon & sediment filters, plastic housing, stainless fittings

Confidence

68%

PossibleBacterial growth in carbon filter or storage tank

Why this gradeBuy

ZeroWater

Culligan ZeroWater Technology 22-Cup Ready Water Filtration Dispenser

PFAS grade

A 100/100

Overall grade

C 78/100

Verdict

Buy

Hazard flags

⚑ 4

Material

Plastic housing, activated carbon + ion-exchange resin filter media

Confidence

62%

PossibleActivated carbon dust or resin particle shedding

ReportedBacterial growth in stagnant water or unmaintained filter

PossibleIon-exchange resin leaching or breakdown products

Why this gradeBuy

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