The Forever Chemical Controversy: 5 Urgent Facts About Kirkland Signature Baby Wipes Safety In 2024

The question of whether Costco baby wipes are safe has taken a dramatic and urgent turn in late 2024, moving far beyond typical discussions of preservatives and fragrances. The popular, budget-friendly Kirkland Signature Baby Wipes, a staple in millions of homes, are currently at the center of a high-stakes legal battle that alleges the presence of "forever chemicals," or Per- and Polyfluoroalkyl Substances (PFAS), in the product. This news directly contradicts the brand’s marketing as hypoallergenic and suitable for sensitive skin, prompting parents to re-evaluate their bulk purchases and demanding transparency from the retail giant.

As of December 14, 2025, the primary safety concern is not a simple ingredient allergy but a serious, long-term environmental and health issue tied to these persistent chemicals. A class-action lawsuit filed in June 2024 claims that the fragrance-free wipes contain unsafe levels of PFAS, which are linked to various health risks. Understanding this controversy is crucial for any parent or caregiver relying on this product for their baby’s delicate skin and overall health. This deep-dive explores the lawsuit, the ingredients, and what you need to know right now.

The Kirkland Signature Baby Wipes PFAS Class-Action Lawsuit (2024)

The most significant safety development regarding Kirkland Signature Baby Wipes in recent history is the class-action lawsuit filed against Costco Wholesale Corporation and its supplier, Nice-Pak Products, Inc., in June 2024.

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What Are PFAS and Why Are They a Concern?

PFAS, or Per- and Polyfluoroalkyl Substances, are a group of synthetic chemicals used since the 1940s in various industrial and consumer products.

• Forever Chemicals: They are commonly referred to as "forever chemicals" because they break down extremely slowly, accumulating in the environment, water sources, and the human body.
• Health Risks: Exposure to certain PFAS has been linked to potential health issues, including increased cholesterol levels, changes in liver enzyme function, decreased vaccine response in children, and an increased risk of kidney and testicular cancer.
• Marketing Contradiction: The lawsuit alleges that the presence of these chemicals makes the wipes "unfit for their intended use," especially given that they are marketed as being made with "naturally derived ingredients" and safe for sensitive skin.

The Allegations Against Costco

The plaintiffs in the lawsuit claim that independent testing revealed detectable levels of PFAS in the Kirkland Signature Baby Wipes, Fragrance Free product.

The core of the legal argument is that Costco failed to disclose the presence of these harmful substances, leading consumers to believe they were purchasing a safe, high-quality, and gentle product for their infants. The suit seeks to represent all individuals who purchased the wipes within a specific time frame.

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Costco's Official Position and Legal Status

Costco has acknowledged the lawsuit, stating on their website that they are working closely with their supplier.

While the company has not admitted to the allegations, they contend that the lawsuit "misrepresents the safety of its product."

Crucially, a motion by Costco to dismiss the class-action lawsuit was denied by the U.S. District Court for the Northern District of California, allowing the litigation to proceed. This indicates the court found the claims to have sufficient merit to move forward.

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A Closer Look at Kirkland Signature Wipes: Ingredients and Safety Claims

Setting aside the recent PFAS controversy, the Kirkland Signature Baby Wipes have historically been a popular choice due to their size, price, and ingredient profile compared to other major brands.

The "Free From" List and Key Ingredients

Costco markets its Kirkland Signature wipes as a product that avoids many common irritants and controversial additives. The packaging highlights that the wipes are:

• Hypoallergenic
• Fragrance-Free
• Alcohol-Free
• Dye-Free
• Paraben-Free
• Phthalate-Free
• Chlorine-Free

The primary components of the wipes are water-based, which necessitates the use of preservatives to prevent microbial growth. The ingredients list typically includes:

• Purified Water (Aqua): The main carrier and solvent.
• Aloe Barbadensis Leaf Juice: Added for its soothing and moisturizing properties.
• Calendula Officinalis Flower Extract: A natural extract often used for skin conditioning.
• Chamomile Recutita (Matricaria) Flower Extract: Known for its calming effects on sensitive skin.
• Preservatives: Ingredients like Phenoxyethanol and Sodium Benzoate are used to ensure the wipes remain safe from bacteria and mold, which is vital for any water-based product.
• Surfactants/Emulsifiers: Components like Coco-Glucoside help in cleaning and mixing the water and oil-based ingredients.

The wipes are also made with Tencel®—a brand of lyocell fiber derived from wood pulp—which is marketed as an ultra-soft, plant-based fiber.

The Preservative Debate: Phenoxyethanol

While the wipes are paraben-free, they do contain Phenoxyethanol, a preservative that has been a point of discussion among consumer safety groups.

Phenoxyethanol is widely used in cosmetics and personal care products as an alternative to parabens. While generally considered safe in low concentrations (up to 1%) by regulatory bodies, some parents prefer to avoid it, especially for newborns and infants with extremely sensitive or broken skin, due to potential, though rare, skin irritation.

3 Safe Alternatives to Consider Amidst the Controversy

Given the ongoing litigation and the heightened concern over PFAS, many parents are actively searching for safer, verified alternatives to the Kirkland Signature wipes. When evaluating other brands, focus on third-party certifications and full ingredient transparency.

1. Water-Based Wipes with Minimal Ingredients

Brands that focus on a two-ingredient formula—typically water and a small amount of fruit extract—are often viewed as the safest option for the most sensitive skin. These wipes minimize the exposure to preservatives and complex chemical mixtures. They are excellent for newborns and babies prone to eczema or diaper rash.

2. Wipes with EWG Verified Status

The Environmental Working Group (EWG) provides a Skin Deep rating system and an "EWG VERIFIED" mark. This certification signifies that a product meets the organization’s strictest standards for health and transparency, containing no ingredients of concern. Looking for this label can quickly narrow down the safest options on the market.

3. Certified Organic or Natural Fiber Wipes

Consider wipes made from certified organic cotton or bamboo, which can reduce the environmental impact and the potential for chemical residues from the manufacturing process. These alternatives often prioritize naturally derived preservatives and shun synthetic additives entirely.

Final Verdict: Should You Keep Using Costco Baby Wipes?

The question of whether to continue using Kirkland Signature Baby Wipes is a personal risk assessment that every parent must make based on the most current information.

On one hand, the wipes are affordable, effective, and free from many traditional irritants like fragrance, alcohol, and parabens, making them a practical choice for many families.

On the other hand, the serious allegations of PFAS—a group of chemicals known for their persistence and potential long-term health effects—cannot be ignored. The fact that the class-action lawsuit is moving forward in court lends credence to the claims that the product may contain substances that contradict its "safe" and "naturally derived" marketing.

For parents seeking the absolute lowest risk, especially those with newborns or children with compromised skin barriers, switching to an alternative brand that is independently verified to be free of PFAS and other controversial chemicals is the most cautious step to take in 2024. For those who choose to continue using the wipes, staying informed about the lawsuit's progress is essential, as the outcome could significantly change the product's safety profile and availability.