What is Alkaline Water? How to Prepare Alkaline Water at Home?

Alkaline water has become a familiar option on supermarket shelves, often marketed as an alternative to regular drinking water. Its most noticeable difference is its pH level, which is usually higher than that of ordinary drinking water. But does a higher pH mean better water? And can a water purifier produce alkaline water at home? Understanding alkaline water starts with knowing what pH measures, how different filtration technologies affect water composition, and why water quality involves much more than a single number.

What Does Alkaline Water Mean?

Alkaline water refers to water with a pH level above 7. The pH scale ranges from 0 to 14 and measures how acidic or alkaline a substance is.

• Below 7: Acidic

• 7: Neutral

• Above 7: Alkaline

Commercial alkaline water products commonly have pH levels between 8 and 9.5. These levels can result from the water's natural composition or from processes designed to increase its pH. One important distinction is that pH and alkalinity are not exactly the same thing. While pH indicates how acidic or alkaline water is at a particular moment, alkalinity describes its ability to resist changes in pH. This depends on the substances dissolved in the water, including bicarbonates and carbonates. Consequently, two water samples with the same pH can have different chemical compositions and different levels of alkalinity.

Typical pH of everyday drinks

What Are the Benefits of Alkaline Water?

Alkaline water is frequently associated with claims about improved hydration, digestion and overall health. However, scientific evidence supporting many of these benefits remains limited. According to Mayo Clinic, alkaline water has not been shown to be healthier than plain drinking water for most people. Some studies have explored whether alkaline water may help with certain conditions, including acid reflux. However, the available research is insufficient to establish a clear health advantage over regular drinking water. The benefits most people actually get from alkaline water are taste and hydration: the mineral content gives a smoother mouthfeel, and people who like the taste tend to drink more water. The health benefits often advertised have been studied but not established.

Does Alkaline Water Provide Better Hydration?

Both alkaline and regular drinking water contribute to daily hydration. The body's ability to maintain its normal acid-base balance is primarily regulated by the lungs and kidneys. A higher drinking-water pH does not automatically improve hydration or change the body's natural pH regulation. For everyday hydration, the more relevant considerations are drinking sufficient water, its quality and whether it is suitable for regular consumption.

Who Can't Drink Alkaline Water?

Alkaline water consumption is generally safe for healthy adults. Three groups should be careful: People with kidney disease. Kidneys regulate mineral balance; according to a 2022 review of electrolyzed-reduced water recommends medical supervision for this group. People on sodium-restricted diets. Baking-soda "recipes" add about 300 mg of sodium per quarter teaspoon. People taking medication. Very high pH water can, in theory, affect the absorption of some medicines; take tablets with ordinary water. Individuals with chronic kidney disease, people on sodium or mineral restrictions and anyone with a digestive disorder should consult a physician before adding alkaline water to their routine. Infant formula should be prepared with ordinary clean water as directed on the pack, not with alkaline or ionized water.

How to Make Alkaline Water at Home

There are several ways in which water can become more alkaline. The method used affects its composition, and the resulting pH can vary depending on the original water.

1. Mineral-Based Water Treatment

Some water treatment systems use specially designed cartridges containing mineral materials that can influence the pH of water. These cartridges are different from standard filtration stages designed to remove contaminants or improve taste.

2. Water Ionizers

Water ionizers use an electrical process called electrolysis to produce water streams with different pH levels. The resulting alkaline water depends on factors such as the composition of the incoming water and the settings of the device. Effective, but units cost around AED 2,000–8,000 and need mineral-containing feed water. Although ionizers are marketed specifically for alkaline water production, their ability to increase pH should not be confused with independently verified contaminant removal.

3. Alkaline Drops and Additives

Commercial alkaline drops contain compounds intended to increase water pH when added to drinking water. Their composition and effectiveness vary between products. The final pH depends on the formulation, concentration and characteristics of the original water. Some home methods also involve baking soda, which can increase water pH. However, baking soda also adds sodium, making it a less suitable option for routine drinking, especially for people who need to limit sodium intake. Lemon water is sometimes included in discussions about alkaline drinks. Despite these associations, adding lemon juice does not make water alkaline. Lemon juice is acidic and generally lowers the pH of the drink.

Does a Water Purifier Produce Alkaline Water?

Water purifiers are designed to treat drinking water, but different filtration technologies affect water composition in different ways. Some systems remove dissolved substances, while others focus on particular contaminants, particles, taste or odour. Certain technologies may also preserve naturally occurring minerals, depending on their filtration design. Reverse Osmosis (RO) uses a semipermeable membrane to reduce many dissolved substances, including minerals. The final water pH depends on the incoming water, treatment stages and other conditions. RO water does not have one universal pH value. Nano-filtration technologies can have different characteristics depending on the membrane and the system's design. Some are developed to retain more of the naturally occurring dissolved minerals while reducing specified contaminants. For this reason, the presence of a water filter does not automatically indicate that a system produces alkaline water. Its actual output depends on the complete filtration process and the water being treated. For more information contact Purunity’s product experts.

Is Water pH an Important Factor in Drinking Water Quality?

Water pH is an important measurement, particularly in water treatment and distribution systems. It can influence factors such as corrosion, chemical stability and the effectiveness of certain treatment processes. However, pH alone does not determine whether drinking water is safe. The World Health Organization identifies pH as an important operational water quality parameter rather than a direct indicator of health benefits. A water sample with a higher pH is not necessarily cleaner than one with a lower pH. Similarly, two types of water with identical pH values may differ significantly in their dissolved substances or microbiological quality. This is why a complete understanding of drinking water quality includes the source, treatment process, relevant water quality measurements and the condition of the distribution system.

Alkaline Water in Dubai: What Should Households Know?

Dubai's drinking water supply largely relies on desalinated seawater that undergoes treatment before entering the public distribution network. The Dubai Electricity and Water Authority (DEWA) monitors drinking water quality across production, transmission and distribution to maintain international quality standards. However, the water reaching an individual household may also pass through a building's storage tanks, internal pipes and plumbing fixtures. These conditions can affect water quality and the experience of using tap water at home. For households comparing bottled alkaline water with filtered drinking water, pH is only one part of the decision. Taste, the type of filtration, convenience, maintenance and dependence on bottled water are equally practical considerations. Our guide to drinking tap water in Dubai explains how local water supply and building-level conditions can influence the water that reaches your tap.

Choosing a Water Purifier for Your Home

A suitable water purifier is not necessarily the one that produces the highest pH level. Its filtration capabilities, water quality performance and daily convenience are more useful factors when comparing different systems. Purunity offers different filtration technologies to accommodate a variety of household needs. The Aqualis+ countertop water purifier uses six-stage Reverse Osmosis and antibacterial filtration. Its treatment stages are designed to reduce specified impurities, while the post-carbon and fine filtration stages help improve water taste. It also provides cold, ambient and hot water for daily use. The Nativus+ uses a three-step filtration system designed to reduce contaminants while preserving naturally occurring minerals. Its technology does not rely on a separate mineralization cartridge. With five temperature settings, it offers flexibility for different daily drinking habits. These filtration approaches serve different purposes and should be evaluated according to their treatment capabilities rather than an assumed alkaline-water benefit. Purunity's water purifier range provides options for households looking to combine effective filtration with convenient access to drinking water.