Kirkland Signature Purified Water

Purified Water

83Clean

Contaminants · 86

From lab tests of this product’s family

Kirkland Purified Water (added minerals)

This product wasn’t tested · results may differ

In the family’s tests: measured by an independent lab and compared against published safety limits.

Total Trihalomethanes0.6 ppbof 80 ppb

1% of the limitFDA bottled-water Standard of Quality, 21 CFR 165.110(b)(4)(iii) — 0.080 mg/L total trihalomethanes (= EPA Stage 1 DBP MCL). CORRECTED 2026-09-24 from 10 ppb: 0.010 mg/L is the BROMATE limit, not TTHM's.

Measured in: Purified Drinking Water

1,1-dichloroethyleneNDnone found

Not detected

Measured in: Purified Drinking Water

1,1,1-trichloroethaneNDnone found

Not detected

Measured in: Purified Drinking Water

1,1,2-trichloroethaneNDnone found

Not detected

Measured in: Purified Drinking Water

1,1,2,2-tetrachloroethaneNDnone found

Not detected

Measured in: Purified Drinking Water

1,2-dibromo-3-chloropropaneNDnone found

Not detected

Measured in: Purified Drinking Water

1,2-dichlorobenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

1,2-dichloroethaneNDnone found

Not detected

Measured in: Purified Drinking Water

1,2-dichloropropaneNDnone found

Not detected

Measured in: Purified Drinking Water

1,2,4-trichlorobenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

1,4-dichlorobenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

2,3,7,8-tcddNDnone found

Not detected

Measured in: Purified Drinking Water

2,4-dNDnone found

Not detected

Measured in: Purified Drinking Water

2,4,5-tpNDnone found

Not detected

Measured in: Purified Drinking Water

AlachlorNDnone found

Not detected

Measured in: Purified Drinking Water

AluminumNDof 200 ppb

Not detectedFDA bottled-water Standard of Quality (secondary/aesthetic), 21 CFR 165.110(b) — 0.2 mg/L. NOTE: this is a bottled-water level; it is not an FDA limit for aluminum in solid foods, where no comparable federal limit exists.

Measured in: Purified Drinking Water

AntimonyNDof 6 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.006 mg/L

Measured in: Purified Drinking Water

ArsenicNDof 10 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.010 mg/L (= EPA MCL)

Measured in: Purified Drinking Water

AtrazineNDnone found

Not detected

Measured in: Purified Drinking Water

BariumNDof 2 ppm

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 2 mg/L

Measured in: Purified Drinking Water

BentazonNDnone found

Not detected

Measured in: Purified Drinking Water

BenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

Benzo(a)PyreneNDnone found

Not detected

Measured in: Purified Drinking Water

BerylliumNDof 4 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.004 mg/L

Measured in: Purified Drinking Water

Bis (2-ethylhexyl) AdipateNDnone found

Not detected

Measured in: Purified Drinking Water

BromateNDof 10 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.010 mg/L

Measured in: Purified Drinking Water

CadmiumNDof 5 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.005 mg/L

Measured in: Purified Drinking Water

CarbofuranNDnone found

Not detected

Measured in: Purified Drinking Water

Carbon TetrachlorideNDnone found

Not detected

Measured in: Purified Drinking Water

ChloramineNDof 4 ppm

Not detectedFDA bottled-water residual-disinfectant limit, 21 CFR 165.110(b)(4)(iii) — chloramine 4.0 mg/L as Cl2 (= EPA MRDL).

Measured in: Purified Drinking Water

ChlordaneNDnone found

Not detected

Measured in: Purified Drinking Water

ChlorineNDnone found

Not detected

Measured in: Purified Drinking Water

Chlorine DioxideNDof 800 ppb

Not detectedFDA bottled-water residual-disinfectant limit, 21 CFR 165.110(b)(4)(iii) — chlorine dioxide 0.8 mg/L as ClO2 (= EPA MRDL).

Measured in: Purified Drinking Water

ChloriteNDnone found

Not detected

Measured in: Purified Drinking Water

ChlorobenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

ChromiumNDof 100 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.1 mg/L total chromium (= EPA MCL)

Measured in: Purified Drinking Water

cis-1,2-dichloroetheneNDnone found

Not detected

Measured in: Purified Drinking Water

CopperNDof 1 ppm

Not detectedFDA bottled-water Standard of Quality (secondary), 21 CFR 165.110(b) — 1 mg/L

Measured in: Purified Drinking Water

CyanideNDof 200 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.2 mg/L

Measured in: Purified Drinking Water

DalaponNDnone found

Not detected

Measured in: Purified Drinking Water

Di(2-ethylhexyl) Phthalate (DEHP)NDof 6 ppb

Not detectedUS EPA drinking-water MCL, 40 CFR 141.61(c) — 0.006 mg/L. Applied to all foods as the TIGHTEST published DEHP number; the EU food-contact limit is looser (Reg. (EU) 10/2011 as amended by 2023/1442: SML 0.6 mg/kg, plus the 0.6 mg/kg DEHP-equivalent group limit with DBP/BBP/DIBP).

Measured in: Purified Drinking Water

DinosebNDnone found

Not detected

Measured in: Purified Drinking Water

DiquatNDnone found

Not detected

Measured in: Purified Drinking Water

EndothallNDnone found

Not detected

Measured in: Purified Drinking Water

EndrinNDnone found

Not detected

Measured in: Purified Drinking Water

EthylbenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

Ethylene DibromideNDnone found

Not detected

Measured in: Purified Drinking Water

FluorideNDof 2 ppm

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 2.0 mg/L domestic non-carbonated (temperature-dependent 1.4–2.4 mg/L)

Measured in: Purified Drinking Water

GlyphosateNDof 160 ppb

Not detectedEWG children's health benchmark 160 ppb (0.01 mg/day in a 60 g serving). EPA tolerance for glyphosate on oats is far higher at 30 ppm (30,000 ppb), 40 CFR 180.364.

Measured in: Purified Drinking Water

Haloacetic Acids (Haa5)NDnone found

Not detected

Measured in: Purified Drinking Water

HeptachlorNDnone found

Not detected

Measured in: Purified Drinking Water

Heptachlor EpoxideNDnone found

Not detected

Measured in: Purified Drinking Water

HexachlorobenzeneNDnone found

Not detected

Measured in: Purified Drinking Water

HexachlorocyclopentadieneNDnone found

Not detected

Measured in: Purified Drinking Water

IronNDof 300 ppb

Not detectedFDA bottled-water Standard of Quality (secondary/aesthetic), 21 CFR 165.110(b) — 0.3 mg/L

Measured in: Purified Drinking Water

LeadNDof 5 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.005 mg/L

Measured in: Purified Drinking Water

LindaneNDnone found

Not detected

Measured in: Purified Drinking Water

ManganeseNDof 50 ppb

Not detectedFDA bottled-water Standard of Quality (secondary/aesthetic), 21 CFR 165.110(b) — 0.05 mg/L

Measured in: Purified Drinking Water

MercuryNDof 2 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.002 mg/L

Measured in: Purified Drinking Water

MethoxychlorNDnone found

Not detected

Measured in: Purified Drinking Water

Methylene ChlorideNDnone found

Not detected

Measured in: Purified Drinking Water

NickelNDof 100 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.1 mg/L

Measured in: Purified Drinking Water

NitrateNDof 10 ppm

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 10 mg/L AS NITROGEN (= EPA MCL). Readings must also be as N, not as nitrate ion; the as-NO3 equivalent would be ~44 mg/L.

Measured in: Purified Drinking Water

NitriteNDof 1 ppm

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 1 mg/L as N

Measured in: Purified Drinking Water

OxamylNDnone found

Not detected

Measured in: Purified Drinking Water

P1 Gross alphaNDnone found

Not detected

Measured in: Purified Drinking Water

PentachlorophenolNDnone found

Not detected

Measured in: Purified Drinking Water

PhenolsNDnone found

Not detected

Measured in: Purified Drinking Water

PicloramNDnone found

Not detected

Measured in: Purified Drinking Water

Polychlorinated BiphenylsNDnone found

Not detected

Measured in: Purified Drinking Water

Radium-226, Radium-228 CombinedNDnone found

Not detected

Measured in: Purified Drinking Water

SeleniumNDof 50 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.05 mg/L (= EPA MCL)

Measured in: Purified Drinking Water

SilverNDof 100 ppb

Not detectedFDA bottled-water Standard of Quality (secondary), 21 CFR 165.110(b) — 0.1 mg/L

Measured in: Purified Drinking Water

SimazineNDnone found

Not detected

Measured in: Purified Drinking Water

StyreneNDnone found

Not detected

Measured in: Purified Drinking Water

TetrachloroethyleneNDnone found

Not detected

Measured in: Purified Drinking Water

ThalliumNDof 2 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.002 mg/L

Measured in: Purified Drinking Water

TolueneNDof 1 ppm

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — toluene 1 mg/L (= EPA MCL).

Measured in: Purified Drinking Water

Total Nitrate + Nitrite-nitrogenNDof 10 ppm

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — total nitrate + nitrite 10 mg/L AS NITROGEN (= EPA MCL).

Measured in: Purified Drinking Water

Total XylenesNDnone found

Not detected

Measured in: Purified Drinking Water

ToxapheneNDnone found

Not detected

Measured in: Purified Drinking Water

trans-1,2-dichloroethyleneNDnone found

Not detected

Measured in: Purified Drinking Water

TrichloroethyleneNDnone found

Not detected

Measured in: Purified Drinking Water

UraniumNDof 30 ppb

Not detectedFDA bottled-water Standard of Quality, 21 CFR 165.110(b) — 0.030 mg/L (= EPA MCL)

Measured in: Purified Drinking Water

Vinyl ChlorideNDnone found

Not detected

Measured in: Purified Drinking Water

ZincNDof 5 ppm

Not detectedFDA bottled-water Standard of Quality (secondary/aesthetic), 21 CFR 165.110(b) — 5 mg/L

Measured in: Purified Drinking Water

Ingredients · 6

GoodCautionAvoid

,,,,,

Healthier swaps

Same shelf, cleaner ingredients

Common questions

Is Kirkland Signature Purified Water healthy?

Kirkland Signature Purified Water scores 83/100 on Tallow — our clean band. That number comes from what is on the label: the ingredients, how processed it is, and what it is packaged in, plus lab results from its product family, Kirkland Purified Water (added minerals). It is not a verdict on your diet — Tallow does not weigh calories, portion size or how often you eat it, so a high score means the ingredients are clean, not that the food is unlimited.

What is in Kirkland Signature Purified Water?

Kirkland Signature Purified Water lists 6 ingredients, starting with Purified Water, Potassium Bicarbonate, Sodium Bicarbonate, Calcium Citrate and Sodium Chloride. Ingredients are listed in descending order by weight, so the first few make up most of what you are eating.

Does Kirkland Signature Purified Water contain seed oils?

No. Nothing in Kirkland Signature Purified Water’s ingredient list matches a seed oil — canola, soybean, corn, cottonseed, grapeseed, sunflower, safflower, rice bran or peanut oil, or an unspecified "vegetable oil".

How processed is Kirkland Signature Purified Water?

Kirkland Signature Purified Water is NOVA group 1: unprocessed or minimally processed. NOVA runs 1 to 4, where 1 is whole food and 4 is ultra-processed.

How does Kirkland Signature Purified Water compare to other water?

At 83/100 Kirkland Signature Purified Water sits in our top band, among the better water we have scored. A higher-scoring option in water is Great Value Purified Drinking Water at 100/100.

Is Kirkland Signature Purified Water organic?

Kirkland Signature Purified Water is not certified organic in our data.

Has Kirkland Signature Purified Water been lab tested?

Not this product itself. It shares a base recipe (Purified water with potassium/sodium bicarbonate, calcium citrate, NaCl, MgO) with the other products in its family, Kirkland Purified Water (added minerals), and 1 product in its family has been lab tested. This product is scored with the worst result for each contaminant across those tests. Those results are in the family's Contaminants section above; its own results may differ.

Does Kirkland Signature Purified Water contain heavy metals?

Kirkland Signature Purified Water itself has not been tested for heavy metals, but other products in its family, which share its base recipe, have: a lab tested them for antimony, arsenic, cadmium, chromium, lead and 3 others and found none above its detection limit. This product is scored with the worst result for each contaminant across those tests. Its own results may differ.

Does Kirkland Signature Purified Water contain glyphosate?

Kirkland Signature Purified Water itself has not been tested for glyphosate, but other products in its family, which share its base recipe, have: a lab tested them for glyphosate and found none above its detection limit. This product is scored with the worst result for each contaminant across those tests. Its own results may differ.

Does Kirkland Signature Purified Water contain phthalates?

Kirkland Signature Purified Water itself has not been tested for phthalates, but other products in its family, which share its base recipe, have: a lab tested them for DEHP and found none above its detection limit. This product is scored with the worst result for each contaminant across those tests. Its own results may differ.

Full methodology: how we score products.

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