Kirkland Signature vs San Pellegrino: which water is healthier?

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

San Pellegrino 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
San Pellegrino Sparkling Mineral Water Glass Bottle

San Pellegrino

San Pellegrino Sparkling Mineral Water Glass Bottle

67

Side-by-side comparison

Kirkland SignatureSan Pellegrino
Purity score63/10067/100
Product comparedKirkland Signature Purified Water Plastic BottleSan Pellegrino Sparkling Mineral Water Glass Bottle
TypeStillSparkling
Water sourceMunicipal SupplyMountain Spring
PackagingPlasticGlass
Microplastics riskHighLow
Lab testedYesYes
PFAS testedYesYes
Contaminants flagged16
pH5.95.18
TDS (minerals)—901 ppm
Fluoride0 mg/L0.47 mg/L

Score breakdown

FactorKirkland SignatureSan Pellegrino
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 San Pellegrino.

Frequently asked questions

Which is better, Kirkland Signature or San Pellegrino?

San Pellegrino 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 San Pellegrino better for avoiding microplastics?

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

Which has more minerals, Kirkland Signature or San Pellegrino?

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

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