Understanding the pH Scale and Water Alkalinity
To determine which brand of bottled water is most alkaline, it is important to first understand the pH scale. The pH scale, which ranges from 0 to 14, measures how acidic or basic (alkaline) a substance is. A pH of 7 is considered neutral, with anything below 7 being acidic and anything above 7 being alkaline. While the pH of standard tap water is generally close to neutral, alkaline bottled water typically has a pH of 8 to 9.5.
There are two primary methods for producing alkaline bottled water:
- Naturally Alkaline Water: This water gains its higher pH from natural processes, typically when it flows over mineral-rich rocks and absorbs compounds like calcium, magnesium, and potassium. These minerals are what contribute to the water's alkalinity and are often responsible for its distinct taste.
- Artificially Ionized Water: This water is often processed tap water that is passed through an ionizer, which uses electrolysis to separate water molecules into acidic and alkaline parts. Alkaline minerals are sometimes added after this process to further raise the pH. This process can be more controversial, as some critics argue that it lacks the beneficial mineral profile of naturally sourced water.
The Top Contenders: Brands with the Highest pH
Based on brand claims and various pH tests, several bottled water brands stand out for their high alkalinity. These include both naturally sourced and artificially ionized options.
- TEN Alkaline Spring Water: Frequently cited as having one of the highest pH levels available, TEN claims a stable pH of 10. Sourced from springs in the Great Appalachian Valley, it is one of the only spring waters with such a high pH.
- Essentia Water: This brand is known for its ionized alkaline water, which is processed to achieve a pH of 9.5. The water undergoes micro-filtration, reverse osmosis, and ultraviolet exposure before having electrolytes (like sodium bicarbonate) added back in.
- Perfect Hydration: Another brand using ionization, Perfect Hydration claims a pH of 9.5+ with added electrolytes.
- Icelandic Glacial Water: This is a naturally alkaline option, sourced from the Ölfus Spring in Iceland. It is filtered through ancient lava rock and naturally has a pH of 8.4.
- Waiakea Hawaiian Volcanic Water: Sourced from Hawaii, Waiakea is another naturally alkaline water, reporting a pH between 7.6 and 8.2.
- Flow Alkaline Spring Water: Sourced from a spring, Flow boasts a natural alkalinity with a pH of 8.1.
Natural vs. Ionized: A Closer Look at the Differences
Beyond the pH number itself, the method of achieving alkalinity is a key differentiator for consumers. Natural alkaline waters are valued for their mineral content, which is a result of geological filtration. For instance, volcanic rock or glacial filtration naturally enriches the water with minerals. In contrast, artificially ionized water's alkalinity is achieved through a technological process rather than mineral saturation.
Some critics of ionized water argue that it offers only the illusion of alkalinity. Because the higher pH is not due to mineral content, the alkalinity can be unstable and may revert to a lower pH over time. Furthermore, some suggest that the added minerals, often sodium bicarbonate (baking soda), are not a sufficient replacement for the diverse mineral profile found in natural spring water.
Alkaline Bottled Water Comparison Table
| Brand | pH Level | Alkalinity Source | Notes |
|---|---|---|---|
| TEN Alkaline Spring Water | ~10 | Natural Spring | One of the highest pH levels, naturally sourced. |
| Essentia Water | ~9.5 | Ionized | Achieves high pH through electrolysis with added electrolytes. |
| Perfect Hydration | ~9.5+ | Ionized | Electrolyte-enhanced, high pH via ionization. |
| Icelandic Glacial | ~8.4 | Natural Spring | Naturally filtered through lava rock. |
| Flow | ~8.1 | Natural Spring | Naturally alkaline, comes in eco-friendly packaging. |
| Eternal | 7.8–8.2 | Natural Spring | pH can vary as it is naturally sourced. |
| Fiji | ~7.7 | Natural Artesian | Naturally filtered through volcanic rock. |
| Dasani | ~5.6 | Purified/Added Minerals | Processed municipal water, tends to be acidic. |
| Aquafina | ~6.0 | Purified | Processed municipal water, tends to be acidic. |
Health Claims: What Does the Science Say?
While alkaline water is marketed with a number of health claims, it is important to separate hype from verifiable fact. The scientific evidence behind many of these claims is limited or mixed, and more research is often needed.
- Acid Reflux: Some small studies suggest that alkaline water may help neutralize pepsin, an enzyme involved in reflux. However, the effect may be minimal, especially when compared to dietary changes.
- Hydration: Some proponents claim that ionized alkaline water hydrates better due to smaller molecular clusters. However, robust scientific evidence is lacking, and regular water is just as effective for general hydration.
- Antioxidant Properties: Some alkaline waters may have a negative oxidation-reduction potential (ORP), suggesting antioxidant properties. While some research supports this, evidence on its meaningful impact on health is limited.
- Bone Health: A 2021 study involving postmenopausal women with osteoporosis suggested that drinking alkaline water could improve spinal bone density when combined with traditional treatments. More research is needed to confirm this benefit.
- Body pH: The most widely disputed claim is that alkaline water can change the body's overall pH. The body's lungs and kidneys naturally and effectively regulate blood pH within a very tight, healthy range (7.35 to 7.45). Drinking alkaline water will not override this natural process.
Which Brand is Most Alkaline? Final Verdict
TEN Alkaline Spring Water is consistently reported to have the highest pH of 10, making it the most alkaline brand of bottled water by numerical measure. However, determining the “best” choice is more nuanced. For those who prioritize a naturally sourced product enriched by geological processes, Icelandic Glacial or Waiakea may be preferred. If the highest possible pH is the main goal, ionized options like Essentia or Perfect Hydration are reliable alternatives. Ultimately, while alkaline water is safe for most healthy individuals, many of the more ambitious health claims should be viewed with skepticism, as the body is naturally equipped to regulate its own pH balance. Choosing the right brand depends on your individual priorities regarding source, processing, and personal preference.
Key Factors for Choosing Alkaline Water
Choosing the best alkaline water for your needs involves considering several factors beyond just the pH level. Here's a quick guide to help you decide:
- Source: Consider whether a naturally sourced spring or artesian water, like Icelandic Glacial, appeals to you more than an artificially processed, ionized water, like Essentia.
- Cost: Alkaline waters can be more expensive than regular bottled water. Compare prices to ensure the cost aligns with your budget and perceived benefits.
- Taste: The mineral content in alkaline water can influence its taste, often described as smoother or slightly sweeter. Taste preference is subjective, so trying a few brands might be beneficial.
- Packaging: Some brands, like Flow and Proud Source, use eco-friendly packaging, which may be a consideration if environmental impact is a concern for you.
Ultimately, the choice of bottled water brand comes down to personal priorities, but TEN Alkaline Spring Water holds the title for the highest pH.
Conclusion
When searching for the most alkaline bottled water, TEN Alkaline Spring Water consistently registers the highest pH at 10. Other high-pH brands like Essentia and Perfect Hydration achieve their alkalinity through artificial ionization, while options like Icelandic Glacial and Waiakea are naturally alkaline. While alkaline water is generally safe and a good source of hydration, many of the health benefits marketed beyond basic hydration are not fully supported by scientific research. Consumers should consider the source of alkalinity, cost, and taste when choosing a brand that best fits their needs.
Additional Facts on Alkaline Water
Water can be made artificially alkaline by adding substances like baking soda or using a water ionizer, but these methods may not replicate the mineral profile of natural sources.
Making the Best Choice for You
Choosing the right alkaline water depends on what you value most. For those seeking the highest documented pH, TEN is the clear winner. For those who prioritize natural sourcing, Icelandic Glacial offers a high pH from a natural source. For cost-conscious consumers, tap water remains a far more economical choice, with equal hydration benefits for most people. Informed decisions consider the proven facts, not just marketing claims.
Beyond the Bottle
For those interested in sustainable and budget-friendly options, creating your own alkaline water at home is an option. This can be done with special filters, ionizers, or by simply adding pH drops or baking soda to filtered water. This can reduce plastic waste and offer a more controlled way to manage alkalinity.
Final Thoughts on the Alkaline Trend
The popularity of alkaline water is undeniable, but it's important to have a balanced perspective. While it may offer certain minor benefits, it is not a miracle cure for diseases or a way to drastically alter your body's pH. For most people, staying consistently hydrated with safe drinking water, regardless of its pH, is the most crucial health benefit of all.
The Difference in Sourcing
Some brands, like Eternal, have naturally alkaline water sourced from springs where the mineral levels and, thus, the pH, can vary slightly between bottles. In contrast, ionized brands have a more consistent, controlled pH level due to the manufacturing process.
A Quick Note on Taste
Some people report that alkaline water has a smoother taste than tap water, which can be attributed to the mineral content and lower levels of chlorine. However, taste is highly subjective, and the perception of a better taste may also be influenced by marketing.
What to Look for on the Label
When purchasing alkaline water, check the label to see if the alkalinity is natural or added. Naturally sourced waters often list their origin (e.g., spring, artesian well), while artificially enhanced waters may mention being ionized or having electrolytes added. This information can help you make a more informed choice based on your preferences.
Personal Preference Reigns Supreme
At the end of the day, the "best" alkaline water is the one that you enjoy drinking and that fits your lifestyle and budget. Whether you prefer the highest possible pH of TEN, the natural filtration of Icelandic Glacial, or another option entirely, staying hydrated is the most important goal.
Final Recommendations
For those prioritizing the highest number on the pH scale, TEN Alkaline Spring Water is the top choice. For a naturally derived high pH, consider Icelandic Glacial. For a reliable, widely available ionized option, Essentia is a popular choice. Always evaluate personal needs and preferences before settling on a brand.
