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Kirkland Signature Ionized Alkaline Water pH 9.5

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Common questions

Is Kirkland Signature Ionized Alkaline Water pH 9.5 healthy?

Kirkland Signature Ionized Alkaline Water pH 9.5 scores 85/100 on Scout's independent analysis of ingredients, additives, and lab results — one of the stronger scores in Scout's catalog. This product is a purified water with added minerals such as calcium chloride, magnesium chloride, and potassium bicarbonate, which enhance its electrolyte content and alkalinity.

How processed is Kirkland Signature Ionized Alkaline Water pH 9.5?

Kirkland Signature Ionized Alkaline Water pH 9.5 is NOVA Group 1: Unprocessed or Minimally Processed Foods.

Which ingredients drive Kirkland Signature Ionized Alkaline Water pH 9.5's score?

In Scout's ingredient-by-ingredient analysis, Magnesium chloride, Potassium bicarbonate count in its favor. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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Kirkland Signature Ionized Alkaline Water pH 9.5

Kirkland Signature
85 Excellent

Analysis updated September 2026 · How Scout scores

$33.99 · 1 L · $1.01 / fluid ounce
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Near you

Kirkland Signature is carried at Costco stores. Find one within 25 miles.

At a glance

Beneficial ingredients 2
Harmful ingredients 0
Owned by Costco
Category Bottled Water
Summary

This product is a purified water with added minerals such as calcium chloride, magnesium chloride, and potassium bicarbonate, which enhance its electrolyte content and alkalinity. While the water is minimally processed, the use of municipal water as a source and the addition of minerals for ionization slightly reduce its score compared to naturally sourced waters. The packaging and transparency details are not specified, which could further influence the rating.

Key ingredients 4

Magnesium chloride
Good

Magnesium chloride is included to improve the mineral profile of the water, supporting muscle and nerve function. It is added in trace amounts to enhance the water's electrolyte content without affecting flavor. Magnesium is crucial for energy production and maintaining normal muscle and nerve function.

Benefits

Contributes to muscle and nerve function, and supports energy production.

See more about Magnesium chloride →
Potassium bicarbonate
Good

Potassium bicarbonate is used to increase the alkalinity of the water, which may help neutralize acid in the body. It is added in small quantities to maintain a balanced pH level without impacting taste. Potassium is an essential mineral that aids in maintaining proper heart and muscle function.

Risks

Excessive intake could lead to hyperkalemia, but the levels in water are typically safe.

Benefits

Supports heart health and muscle function by providing essential potassium.

See more about Potassium bicarbonate →
Purified water
Neutral

Purified water is the primary component of this product, providing hydration without additional nutrients or contaminants. The purification process typically involves filtration and distillation to remove impurities, ensuring a clean and safe product. As a base ingredient, it does not contribute additional health benefits beyond hydration.

See more about Purified water →
Calcium chloride
Neutral

Standard formulation ingredient — neither beneficial nor harmful at typical use.

Risks

Excessive consumption could lead to hypercalcemia, but the amounts in water are generally safe.

Benefits

Provides calcium, which is essential for bone health and proper muscle function.

See more about Calcium chloride →

Processing

Group 1 · Minimally processed

Unprocessed or Minimally Processed Foods

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Amazon pricing & content

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