Kirkland Signature vs Perrier: which water is healthier?

Updated · Scores from third-party lab reports · How we score

Perrier is the healthier choice, scoring 67/100 versus 63/100 for Kirkland Signature. The biggest differences are packaging material and water source.

Kirkland Signature Purified Water Plastic Bottle

Kirkland Signature

Kirkland Signature Purified Water Plastic Bottle

63
Perrier Sparkling Mineral Water Glass Bottle

Perrier

Perrier Sparkling Mineral Water Glass Bottle

67

Side-by-side comparison

Kirkland SignaturePerrier
Purity score63/10067/100
Product comparedKirkland Signature Purified Water Plastic BottlePerrier Sparkling Mineral Water Glass Bottle
TypeStillSparkling
Water sourceMunicipal SupplyAquifer
PackagingPlasticGlass
Microplastics riskHighLow
Lab testedYesYes
PFAS testedYesYes
Contaminants flagged13
pH5.95.2
TDS (minerals)—470 ppm
Fluoride0 mg/L—

Score breakdown

FactorKirkland SignaturePerrier
Lab report indexed45/4545/45
Contaminants17/500/50
Water source15/2525/25
Mineral preservation17/1717/17
Packaging material2/2222/22
Cap material7/70/7
PFAS testing5/55/5

Each brand is represented by its most popular product. See all products from Kirkland Signature and Perrier.

Frequently asked questions

Which is better, Kirkland Signature or Perrier?

Perrier is the healthier choice, scoring 67/100 versus 63/100 for Kirkland Signature. The biggest differences are packaging material and water source.

Is Kirkland Signature or Perrier better for avoiding microplastics?

Kirkland Signature (plastic) has a high microplastics risk and Perrier (glass) has a low risk, based on packaging material.

Which has more minerals, Kirkland Signature or Perrier?

Total dissolved solids (TDS) is not reported for both products, so check each product page for its mineral list.

More comparisons