The best bottled water at Costco overall is Kirkland Signature Spring Water for its balanced taste and affordability, while Fiji Water is a great alternative for those seeking a smooth, mineral-rich premium option.
Check price on AmazonChoosing the best bottled water at Costco can be overwhelming with so many brands on the warehouse shelves. We compared the most popular options based on taste, source, water quality reports, and owner reviews to help you make an informed choice for hydration.
Our research included analyzing consumer reports, expert water sommelier opinions, and Costco member feedback to rank the top contenders. From crisp spring waters to alkaline options, these picks represent the best in purity and drinkability for every preference.
How we rank
We ranked based on a combination of blind taste test results, water quality analysis reports, and aggregated member reviews from Costco forums and retail sites. See our method.
Quick picks
| Best for | Product | Who it suits |
|---|---|---|
| Best Overall | Kirkland Signature Spring Water (40-Pack) | Everyday hydration and bulk buyers |
| Best Premium | Fiji Natural Artesian Water (24-Pack) | Those who prefer a smooth, silica-rich water |
| Best for Taste Purity | Evian Natural Spring Water (24-Pack) | Purists who want consistent, low-mineral spring water |
| Best Lightweight | Acqua Panna Natural Spring Water (24-Pack) | Those who find heavy mineral waters unappealing |
| Best Value | Core Hydration (32-Pack) | Budget-conscious shoppers wanting balanced pH water |
| Best for Purity | Icelandic Glacial Natural Spring Water (24-Pack) | Those seeking ultra-pure water with a crisp taste |
| Best Budget | Dasani Purified Water (32-Pack) | Budget-minded shoppers seeking a reliable everyday water |
The picks, compared
Kirkland Signature Spring Water (40-Pack)
Kirkland Signature Spring Water consistently ranks as the top choice among Costco shoppers. Sourced from natural springs, it offers a clean, refreshing taste with no off-putting mineral aftertaste. Owners report it as a reliable staple for home and office, providing great quality at a reasonable cost. Its widespread availability in bulk makes it a convenient pick for families.
What owners say: Owners repeatedly highlight the consistent crisp taste and the convenience of the 40-pack. Many note it's their go-to water for daily drinking and that it outperforms more expensive brands in blind taste tests.
- Crisp, mild flavor widely preferred in taste tests
- Convenient bulk packaging
- Reliable spring source quality
- Plastic bottles not environmentally friendly
- Some find it too neutral or flat
Fiji Natural Artesian Water (24-Pack)
Fiji Water is sourced from an artesian aquifer in Fiji and known for its famously smooth mouthfeel. The natural silica content gives it a silky texture that many find more palatable than standard spring waters. Reviewers note its distinctive taste stands out, making it a premium choice for special occasions or discerning drinkers. It is often recommended for use in coffee or whiskey tasting to enhance flavors.
What owners say: Owners frequently praise the unique smoothness and lack of chlorine or plastic taste. Some comment on the premium price but feel the quality justifies it for occasional use.
- Exceptionally smooth texture due to silica
- Distinct, consistent flavor profile
- Electrolyte balance for hydration
- Higher cost compared to other Costco waters
- Environmental impact of long-distance shipping
Evian Natural Spring Water (24-Pack)
Evian is a classic French spring water with a balanced mineral composition and a neutral pH. Its light taste and consistent quality make it a favorite among water purists. Owners appreciate that it doesn't have any aftertaste and is gentle on the stomach. While some find it similar to Kirkland Signature, Evian's brand reputation for purity adds confidence.
What owners say: Owners often mention that Evian has a very clean, crisp taste and is their preferred water for mixing with powders or hydration packs. Many note it's a trusted brand for sensitive stomachs.
- Clean, neutral flavor with no aftertaste
- Highly consistent quality across batches
- Trusted brand with long history
- Pricier than Kirkland Signature
- Plastic bottles contribute to waste
Acqua Panna Natural Spring Water (24-Pack)
Acqua Panna is a Tuscan spring water known for its light, almost sweet profile and low total dissolved solids. It's an excellent option for water drinkers who dislike the heavy or chalky feel of some mineral waters. Owners describe it as easy to drink in large quantities and complementary to meals. It is also a popular choice in fine dining settings for its subtle flavor.
What owners say: Owners frequently comment on its refreshing lightness and lack of mineral bitterness. Many say it's their go-to water for daily hydration without feeling weighed down.
- Very light and easy to drink
- Low mineral content for subtle taste
- Pairs well with food and coffee
- Some consider it too plain
- Not as readily available in all Costco locations
Core Hydration (32-Pack)
Core Hydration is a purified water with added electrolytes and a pH of 7.4, marketed for optimal hydration. It offers a smooth taste at a price point that undercuts many premium alkaline waters. Owners report that it tastes better than many tap or cheap bottled brands and is a solid value for bulk purchase. The bottle design also features a unique shape that's easy to grip.
What owners say: Owners appreciate the great taste for the price and the added electrolytes. Some note that the pH level is a nice bonus, though they primarily buy it for the affordability and flavor.
- Excellent value for price compared to other enhanced waters
- Smooth taste with added electrolytes
- Convenient ergonomic bottle design
- Not from a natural spring source
- Some cheap plastic taste reported by a few
Icelandic Glacial Natural Spring Water (24-Pack)
Icelandic Glacial is sourced from the Ölfus Spring in Iceland, one of the most pristine natural sources on Earth. It has a low mineral content and a naturally alkaline pH of 8.4. Owners rave about its exceptionally clean and refreshing taste, often describing it as the best-tasting water they've tried. The brand also emphasizes sustainable packaging and carbon-neutral production.
What owners say: Owners consistently highlight the incredibly pure and crisp taste, with many saying it's the only water they'll drink. The eco-friendly packaging is also a frequently mentioned bonus.
- Extremely pure taste with no aftertaste
- Naturally alkaline and rich in electrolytes
- Sustainable and eco-conscious packaging options
- Higher price point
- Availability may be limited in some regions
Dasani Purified Water (32-Pack)
Dasani is a purified water with added minerals for taste, widely available at Costco in bulk. It is one of the most affordable options, appealing to those who need large quantities without sacrificing basic quality. Owners describe it as a decent, neutral-tasting water that gets the job done. While not the most flavorful, it is consistent and convenient.
What owners say: Owners often choose Dasani for its low price and consistent availability. Some note a slight 'chemical' taste from the added minerals, but most find it acceptable for daily use.
- Very affordable for bulk purchase
- Widely available at all Costco locations
- Consistent taste and quality
- Some complain of a mineral or plastic aftertaste
- Less natural flavor than spring waters
How to choose
- Source and Purity. Check if the water is from a natural spring, artesian aquifer, or purified municipal source. Spring waters often have a fresher taste and contain natural minerals, while purified waters are filtered and may have additives.
- Taste Preference. Water taste varies widely due to mineral content and pH. Light, crisp waters like Acqua Panna suit those who dislike heavy flavors, while silky waters like Fiji appeal to those who enjoy a smoother mouthfeel.
- pH and Electrolytes. Alkaline waters (pH >7) may offer a smoother taste and are sometimes marketed for hydration. Electrolyte-enhanced waters can help with rehydration after exercise, but for daily use, neutral pH is often preferred.
- Packaging and Environmental Impact. Bottled water creates plastic waste. Consider brands using recycled materials or participating in carbon offset programs. Bulk packs reduce per-bottle waste but still contribute to overall plastic usage.
- Price and Value. Kirkland Signature offers the best value for spring water quality. For premium options, Fiji and Icelandic Glacial cost more but deliver unique taste profiles. Budget-friendly Dasani is adequate for large volume needs.
Frequently asked questions
Is Kirkland Signature water actually good?
Yes, Kirkland Signature Spring Water is highly rated by Costco members for its clean, crisp taste and reliable quality. Many blind taste tests place it alongside premium brands, making it a top value pick.
What is the healthiest bottled water at Costco?
Icelandic Glacial and Evian are often considered among the healthiest due to their natural spring sources and low contaminant levels. Icelandic Glacial is naturally alkaline and rich in electrolytes, which some find beneficial.
Does Costco sell alkaline water?
Yes, Costco carries Core Hydration and Icelandic Glacial, both of which have a pH above 7. Core Hydration has a pH of 7.4, while Icelandic Glacial has a pH of 8.4, making them good alkaline options.
Which bottled water at Costco has the best taste?
Taste is subjective, but Fiji Water and Icelandic Glacial consistently receive high marks for flavor. Fiji's silky texture and Icelandic Glacial's ultra-pure crispness are frequently praised by reviewers.
Is Dasani water good?
Dasani is a serviceable budget option, but it receives mixed reviews. Some find it has a distinct mineral aftertaste from the added salts, while others consider it fine for everyday use. It is best for those prioritizing cost over taste.
What is the most eco-friendly bottled water at Costco?
Icelandic Glacial is a leader in sustainability, using 100% recycled PET bottles and offsetting carbon emissions. Acqua Panna also has eco-conscious initiatives, but plastic waste remains a concern for all bottled water.
The verdict
For the best overall bottled water at Costco, Kirkland Signature Spring Water offers an unbeatable balance of taste and value, satisfying most households. If you prefer a premium experience, Fiji Water's smooth texture is a standout for special occasions. For budget-conscious shoppers, Dasani provides a reliable, affordable option for bulk hydration needs.
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