Kirkland Signature vs Topo Chico: which water is healthier?

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

Topo Chico is the healthier choice, scoring 64/100 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
Topo Chico Mineral Water Glass Bottle

Topo Chico

Topo Chico Mineral Water Glass Bottle

64

Side-by-side comparison

Kirkland SignatureTopo Chico
Purity score63/10064/100
Product comparedKirkland Signature Purified Water Plastic BottleTopo Chico Mineral Water Glass Bottle
TypeStillSparkling
Water sourceMunicipal SupplySpring
PackagingPlasticGlass
Microplastics riskHighLow
Lab testedYesYes
PFAS testedYesNo
Contaminants flagged17
pH5.95.6
TDS (minerals)—630 ppm
Fluoride0 mg/L0.096 mg/L

Score breakdown

FactorKirkland SignatureTopo Chico
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 testing5/50/5

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

Frequently asked questions

Which is better, Kirkland Signature or Topo Chico?

Topo Chico is the healthier choice, scoring 64/100 versus 63/100 for Kirkland Signature. The biggest differences are packaging material and water source.

Is Kirkland Signature or Topo Chico better for avoiding microplastics?

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

Which has more minerals, Kirkland Signature or Topo Chico?

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

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