Poland Spring vs Kirkland Signature: which water is healthier?

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

Kirkland Signature is the healthier choice, scoring 63/100 versus 56/100 for Poland Spring. The biggest differences are contaminants and PFAS testing.

Poland Spring Water Jug

Poland Spring

Poland Spring Water Jug

56
Kirkland Signature Purified Water Plastic Bottle

Kirkland Signature

Kirkland Signature Purified Water Plastic Bottle

63

Side-by-side comparison

Poland SpringKirkland Signature
Purity score56/10063/100
Product comparedPoland Spring Water JugKirkland Signature Purified Water Plastic Bottle
TypeStillStill
Water sourceMountain SpringMunicipal Supply
PackagingPlasticPlastic
Microplastics riskHighHigh
Lab testedYesYes
PFAS testedNoYes
Contaminants flagged71
pH6.855.9
TDS (minerals)55 ppm—
Fluoride0.9 mg/L0 mg/L

Score breakdown

FactorPoland SpringKirkland Signature
Lab report indexed45/4545/45
Contaminants0/5017/50
Water source25/2515/25
Mineral preservation17/1717/17
Packaging material2/222/22
Cap material7/77/7
PFAS testing0/55/5

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

Frequently asked questions

Which is better, Poland Spring or Kirkland Signature?

Kirkland Signature is the healthier choice, scoring 63/100 versus 56/100 for Poland Spring. The biggest differences are contaminants and PFAS testing.

Is Poland Spring or Kirkland Signature better for avoiding microplastics?

Poland Spring (plastic) has a high microplastics risk and Kirkland Signature (plastic) has a high risk, based on packaging material.

Which has more minerals, Poland Spring or Kirkland Signature?

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

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