Peak Series Gravity Water Filter System vs Culligan ZeroWater Technology 22-Cup Ready Water Filtration Dispenser: which is safer?

LifeStraw Peak Series Gravity Water Filter System is our pick: better on PFAS and on the overall hazard picture.

Our pick

LifeStraw

Peak Series Gravity Water Filter System

PFAS grade

A 100/100

Overall grade

B 88/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Borosilicate glass, stainless steel, activated carbon filter media

Confidence

72%

PossibleBacterial growth in filter media and housing

PossibleBorosilicate glass breakage

PossibleActivated carbon dust or microparticles in filtered water

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