Who Makes Kirkland Bottled Water? (The Truth!)

Who Makes Kirkland Bottled Water

Kirkland Signature water might be dedicated to sustainability but how does their water compare to other top brands? Is it safe to drink? Does it have minerals or fluoride? Where does it even come from?

If you’re unsure whether or not to buy Kirkland Signature water, we’ve got all the answers you need to make an informed decision based on the facts.

So, who makes Kirkland bottled water? Kirkland bottled water is sourced straight from the Rocky Mountains and then bottled in California by the Niagara Bottling Company. It is filtered, purified, and mineralized, all without harmful BPA. However, Kirkland Signature water might be inexpensive but that doesn’t make it low quality.

For more information on where Kirkland Signature gets their water and how it ends up in your pantry shelves, keep reading to learn about their bottling process, manufacturing background, and more!

A Brief History of Kirkland’s Signature Water

Perhaps it’s just a coincidence or perhaps it was fated, but Kirkland Signature water comes from a region of the Rocky Mountains in Kirkland, Washington, fed by the Cedar River Watershed.

This may come as a surprise to anyone familiar with the Kirkland Signature brand, considering that the brand’s products almost always come from a third-party manufacturer.

In fact, Kirkland Signature doesn’t even bottle its own water. Instead, they’ve teamed up with the Niagara bottling company to provide buyers with affordable yet healthy bottled water the fits with Costco’s commitment to sustainability.

After sourcing raw water from the Rocky Mountains, they then remove bacteria and particulate matter through carbon filtration, UV filtration, and aeration.

The mineral content in the water is then balanced to match the mineral requirements for an average adult human. All of these processes follow FDA and EPA regulations, so you know you’re drinking top-quality water sourced responsibly.  

Best of all, Kirkland Signature water is bottled using 100% BPA-free plastic bottles that won’t contaminate the water or lead to health problems.

After testing, medical researchers even awarded the brand with an A rating for health and safety.  

Read also: Who Makes Kirkland Orange Juice? (Price, Ingredients, Nutrition Facts, Squeezed)

Results of Kirkland Signature Water Safety Tests

Before it could be sold to the public, Kirkland Signature water had to be thoroughly tested for pollutants, contaminants, and possible free radicals such as BPA.

Unsurprisingly, the Niagara bottled water brand passed with highly positive results.

Thanks to the double UV/carbon filtration process, researchers found that all impurities had been successfully removed.

They also found an abundance of beneficial minerals that humans require to live and grow. You can find a breakdown of the mineral and chemical composition here:

  • Iron – 5 parts per million (ppm)
  • Bromine – 10 ppm
  • Ammonia Chloride – 100 ppm
  • Copper – 0 ppm
  • Chlorine – 0.5 ppm
  • Lead – 0 ppm
  • Total hardness- 0
  • Nitrate – 0 ppm
  • Nitrite – 0 ppm
  • MPS – 0 ppm

Overall, they found that Kirkland Signature water has an alkalinity of around 40 ppm and a pH level around 6.0, making it slightly acidic, in line with most naturally sourced waters.  

Pros and Cons of Drinking Kirkland Signature Water

Now that you know that Kirkland Signature water is just Niagara water under the guise of Costco’s premium brand, you may be wondering if there are any benefits or downsides to drinking it versus another top brand.

We’ve gone ahead and compared it to other brands and come up with these pros and cons:


  • Contains essential minerals for human growth and development
  • BPA-free bottles
  • No added coloring or flavoring
  • Consistent with FDA and EPA safety regulations


  • More expensive than drinking tap water
  • Kirkland Signature water is not fluoridated, unlike tap water
  • Niagara doesn’t use chlorine in its filtration process, which is more reliable than charcoal and UV filtration

We understand that the health of you and your family is paramount when you’re considering which water brands to buy.

Therefore, we can assure you that even though their water isn’t chlorinated, Kirkland Signature brand is completely safe for human consumption. Some parents may prefer buying chlorinated water, though.

How Niagara Filters Their Water

Essentially, the Niagara Bottling Company uses a double-filtration process to remove particulate matter and harmful bacteria from their water.

When they receive raw water from the Cedar River Watershed, they first push it through activated charcoal to remove macroparticles such as sand, dirt, and larger bacteria cells.

From there, they expose the water to powerful 254-nm UV rays, which produce enough energy to disturb bacterial DNA and prevent them from reproducing.

After enough exposure, all living organisms, including viruses, bacteria, and protists are removed from the water.

Read also: Who Makes Kirkland Colombian Coffee (Supremo)


If you’ve recently seen Kirkland Signature bottled water for sale at your local Costco, know that you’re really buying Niagara water that’s been rebranded and packaged using the Kirkland Signature name.

This water has been thoroughly tested and approved by both the FDA and EPA for its commitment to safety and sustainability. Therefore, you can give it to your family knowing they’re drinking top-quality water.

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Lindsey graduated with an MBA in 2009. Since then, Lindsey has worked in the retail and consumer service industry as a manager, advisor, and marketer. Lindsey is also the head writer and Co-founder of Rvandplaya.com. Lindsey is based in Morgantown, West Virginia.

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