What kind of water should we drink?
[Best to Worst for Daily Hydration]

This list is not meant as medical advice. Instead, it answers the question “what kind of water should we drink?” by ranking common water types for daily use based on safety, hydration, mineral content, possible contaminants, and how realistic each option is for everyday life.

1. Alkaline Ionized Water

Alkaline ionized water ranks highest because it offers several benefits in one: it is filtered, contains minerals, tastes smooth, has a higher pH, and sometimes includes dissolved molecular hydrogen.
 
A water ionizer typically filters water first, then uses electrolysis to separate it into alkaline and acidic streams. The alkaline stream is used for drinking. Depending on the source water and device, alkaline ionized water may contain minerals such as calcium and magnesium, as well as dissolved molecular hydrogen.
 
The strongest scientific interest in this category is not simply “alkalinity.” It is molecular hydrogen.
 
Hydrogen-rich water has been studied for its potential role in oxidative stress and redox balance. However, it should not be described as a cure for chronic disease or a guaranteed anti-aging solution. The more accurate statement is that molecular hydrogen is an emerging research area related to antioxidant signaling and cellular stress.
 
 
Why it ranks high:
  • Can support consistent daily hydration
  • Often has a smoother taste than ordinary tap water.
  • May retain or provide minerals depending on the system
  • May contain dissolved molecular hydrogen
  • Reduces reliance on bottled water
  • Works well for drinking, cooking, tea, and daily wellness routines
Balanced note: alkaline ionized water should be positioned as a wellness-supporting water, not a medical treatment.

2. Fresh Spring Water

Fresh spring water can be an excellent natural water source when properly tested, protected, and free of contamination. It often contains naturally occurring minerals that enhance taste and may modestly contribute to daily mineral intake.
 
The challenge is safety and consistency. A spring may be clean in one season and affected by runoff, animal activity, agricultural chemicals, or environmental contamination in another. Once bottled, spring water also becomes subject to packaging, storage, and transportation conditions.
 
Why it ranks high:
  • Naturally occurring minerals
  • Pleasant taste when sourced safely
  • Less processed than some purified waters
  • Can support daily hydration
Limitations:
  • Requires testing and source transparency
  • May vary by location and season
  • Bottled versions may involve plastic packaging.
Spring water is best when the source is verified and regularly tested.

3. Remineralized Reverse Osmosis Water

Reverse osmosis, or RO, is a strong filtration method that can reduce many contaminants, including dissolved solids, some heavy metals, and certain chemical residues. The downside is that RO can also remove beneficial minerals.
 
Remineralized RO water helps address that problem by adding minerals back after filtration. This can improve taste and make the water more suitable for daily drinking.
 
Why it ranks well:
  • Strong contaminant reduction
  • Improved taste after remineralization
  • More balanced than plain RO water
  • Useful where tap water quality is poor
Limitations:
  • Requires filter maintenance
  • Produces wastewater in many systems
  • Mineral balance depends on the remineralization method.
Remineralized RO water is a strong choice for people who prioritize contaminant reduction but still want better taste and mineral balance.

4. Natural Bottled Water

Bottled water is convenient, portable, and widely available. For travel, emergencies, and situations where tap water safety is uncertain, it can be useful.
 
However, bottled water is not automatically superior. It depends on the source, treatment, packaging, storage, and brand transparency. Bottled water may sit in warm warehouses, trucks, or cars, and plastic packaging raises environmental and potential microplastic concerns.
 
 
Why it ranks in the middle:
  • Convenient
  • Useful for travel and emergencies
  • Regulated in the United States by FDA requirements
  • Taste varies by source.
Limitations:
  • Plastic waste
  • Storage temperature concerns
  • Higher long-term cost
  • Quality varies by brand.
Bottled water is useful, but it should not be the automatic default for daily hydration if a better home filtration or ionization option is available.

5. Filtered Tap Water

Filtered tap water is one of the most practical options for many households. A good filter can reduce chlorine taste, odor, sediment, and selected contaminants, depending on the filter type.
 
The key is choosing the right filter for the actual water problem. Activated carbon, reverse osmosis, ion exchange, and specialty filters all do different things. A simple pitcher filter may improve taste but may not address all contaminants.
 
Why is it useful:
  • Affordable compared with bottled water
  • Reduces plastic waste
  • Improves taste and odor
  • Can be customized with the right filter
Limitations:
  • Filter performance varies widely.
  • Cartridges must be replaced on schedule.
  • May not restore minerals
  • Does not automatically address all contaminants
Filtered tap water is a good starting point, especially when paired with local water testing and proper filter maintenance.

6. Boiled Water

Boiling water can be useful in certain situations because it kills many bacteria, viruses, and parasites. This is why boiling is often recommended during emergency advisories or when microbial contamination is suspected.
 
However, boiling does not remove many chemical contaminants, heavy metals, PFAS, nitrates, or microplastics. It may even concentrate some substances as water evaporates.
 
Why it can help:
  • Useful for microbial safety
  • Simple and accessible
  • Important during boil-water advisories
Limitations:
  • Does not remove many chemical contaminants
  • Does not improve mineral balance
  • Taste may be flat
  • Not a complete purification method
Boiled water is useful for emergency microbial control, but it is not the best everyday solution for comprehensive water quality.

7. Distilled Water

Distilled water is produced by boiling water and collecting the condensed steam. This process removes many minerals and contaminants. It can be useful for medical devices, laboratory use, humidifiers, and short-term special purposes.
 
For everyday drinking, distilled water may not be ideal for everyone because it contains no minerals and often tastes flat. It is not “dangerous” in normal amounts, but it also does not provide the mineral profile many people prefer in daily drinking water.
 
Why does it have specific uses:
  • Very low dissolved solids
  • Useful for appliances and certain technical needs
  • Can reduce many contaminants
Limitations:
  • No minerals
  • Flat taste
  • Not usually the best daily hydration choice
  • May require remineralization for regular drinking preference
Distilled water is purity-focused, but purity alone does not always equal the best daily drinking experience.

8. Store-Bought Alkaline Water

Store-bought alkaline water may have a higher pH, often around 8 to 9.5, but pH alone does not guarantee superior hydration, antioxidant activity, or wellness benefits.
 
Some bottled alkaline waters are made by adding minerals or using filtration and ionization processes. Others are simply adjusted for pH. Once bottled, the water may lose some functional characteristics over time, especially if the product relies on dissolved gases or unstable chemistry.
 
Why it may appeal:
  • Convenient
  • Often smooth tasting
  • May help people drink more water
  • Can be useful while traveling
Limitations:
  • pH alone is not enough
  • Functional properties vary widely.
  • Plastic packaging concerns
  • More expensive than home water systems
Store-bought alkaline water can be a step up from sugary drinks, but it should not be confused with freshly produced alkaline ionized water from a quality home system.

9. Contaminated Tap, Well, or Spring Water

The lowest-ranked water is any water that contains unsafe levels of contaminants. This may include untreated well water, poorly maintained spring sources, or public/private water affected by local contamination.
 
Potential concerns include bacteria, viruses, parasites, lead, arsenic, nitrates, pesticides, PFAS, industrial chemicals, and disinfection byproducts.
 
 
This type of water should not be consumed without appropriate testing and treatment.
 
Why it ranks last:
  • May contain harmful contaminants
  • Can pose acute or long-term health risks
  • May look clear while still unsafe
  • Requires testing, filtration, or treatment
The safest approach is to test questionable water and choose certified treatment technologies based on the contaminant profile.

Comparison Table: 9 Types of Drinking Water

Alkaline Ionized Water Filtration, minerals, smooth taste, possible dissolved hydrogen Should not be marketed as a cure Daily wellness hydration
Fresh Spring Water Natural minerals and taste Source must be tested Natural hydration when verified
Remineralized RO Water Strong filtration plus restored minerals Requires maintenance Homes with contaminant concerns
Natural Bottled Water Convenience Plastic, storage, cost Travel and emergency use
Filtered Tap Water Affordable and practical Filter quality varies Everyday basic hydration
Boiled Water Microbial control Does not remove many chemicals Emergency use
Distilled Water Very low dissolved solids No minerals, flat taste Devices or short-term specific use
Store-Bought Alkaline Water Convenient higher-pH option pH alone is not enough Occasional use
Contaminated Water None for drinking Safety risk Avoid until tested and treated

What Readers May Notice When They Improve Their Water Habits

Changing water quality does not create instant medical transformation. However, improving daily hydration habits can make a noticeable difference for many people.
 
In the first week, people may notice they drink water more consistently, especially if the taste is smoother. Better hydration can support thirst regulation, digestion, and exercise recovery.
 
After several weeks, replacing sugary drinks, excess caffeine, or poorly tasting water with clean, mineral-rich water may support steadier daily energy levels and better hydration.
 
Over time, the biggest benefit may be behavioral: people drink more water because they enjoy it.
 
This is one of the most overlooked benefits of high-quality water. The best water is not just the one with the most impressive claims. It is the one that is safe, clean, balanced, and easy to drink every day.

So, What Kind of Water Should We Drink?

The best everyday water should be:
  • Safe
  • Well-filtered
  • Pleasant tasting
  • Mineral-conscious
  • Low in unwanted contaminants
  • Practical for daily use
  • Supported by credible science, not exaggerated claims
For many wellness-focused households, freshly produced alkaline ionized water can be a strong choice because it combines filtration, minerals, a smooth taste, and potential molecular hydrogen. It also reduces dependence on bottled water and supports a consistent hydration routine.
 
However, the most responsible conclusion is balanced:

The healthiest water is not defined solely by marketing. It is defined by safety, quality, mineral balance, filtration, taste, and whether it helps you hydrate consistently.

For more science-based wellness articles on alkaline water, hydrogen water, functional water, and daily hydration habits, readers can explore the BioNatural Wellness Blog.