Kirkland Signature vs Icelandic Glacial: which water is healthier?

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

Icelandic Glacial is the healthier choice, scoring 71/100 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
Icelandic Glacial Water Glass Bottle

Icelandic Glacial

Icelandic Glacial Water Glass Bottle

71

Side-by-side comparison

Kirkland SignatureIcelandic Glacial
Purity score63/10071/100
Product comparedKirkland Signature Purified Water Plastic BottleIcelandic Glacial Water Glass Bottle
TypeStillStill
Water sourceMunicipal SupplyMountain Spring
PackagingPlasticGlass
Microplastics riskHighLow
Lab testedYesYes
PFAS testedYesYes
Contaminants flagged129
pH5.97.7
TDS (minerals)—68.9 ppm
Fluoride0 mg/L0 mg/L

Score breakdown

FactorKirkland SignatureIcelandic Glacial
Lab report indexed45/4545/45
Contaminants17/500/50
Water source15/2525/25
Mineral preservation17/1717/17
Packaging material2/2222/22
Cap material7/77/7
PFAS testing5/55/5

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

Frequently asked questions

Which is better, Kirkland Signature or Icelandic Glacial?

Icelandic Glacial is the healthier choice, scoring 71/100 versus 63/100 for Kirkland Signature. The biggest differences are packaging material and water source.

Is Kirkland Signature or Icelandic Glacial better for avoiding microplastics?

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

Which has more minerals, Kirkland Signature or Icelandic Glacial?

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

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