The pH level of alkaline water does not remain constant after bottling or storage, and it can change over time. Alkaline water is characterised by having a higher pH level, typically above 7 on the pH scale, which measures the acidity or alkalinity of a substance.
This elevated pH is often achieved through the addition of minerals such as calcium, magnesium, and potassium, or through a process known as electrolysis in water ioniser machines.
While alkaline water is marketed for its potential health benefits, it's essential to understand that its pH level can fluctuate under various conditions.
The pH level of water, including alkaline water, can be influenced by several factors, and these changes can occur during bottling and storage.
Here are some of the key factors that can impact the pH level of alkaline water:
- Exposure to Air: When alkaline water is exposed to air, it can absorb carbon dioxide from the environment. Carbon dioxide can form carbonic acid when dissolved in water, which can lower the pH of the water. This is why some alkaline water may become less alkaline over time, especially if the bottle is not properly sealed or if the water is left exposed.
- Contact with Light: Exposure to light, particularly sunlight, can lead to changes in the composition of water. This exposure can promote the breakdown of certain compounds in the water, which might affect its pH. This is more of a concern with transparent or semi-transparent containers.
- Temperature: Temperature variations can also influence the pH of alkaline water. When water is exposed to extreme temperatures, it can alter the balance of minerals and ions, potentially affecting the pH level. This is why it's generally recommended to store alkaline water at moderate temperatures.
- Container Material: The material of the container can impact the pH of alkaline water. Some containers, especially those made of plastic, can release chemicals over time, which may change the pH of the water. Choosing the right type of container for storing alkaline water is crucial.
- Duration of Storage: The longer alkaline water is stored, the more time there is for potential pH changes to occur. Therefore, it's generally advisable to consume alkaline water relatively soon after it's bottled to minimise any pH fluctuations.
- Water Source: The quality and mineral content of the source water used to produce alkaline water can also play a role in how stable its pH is. Variations in source water can lead to differences in the final pH of the alkaline water.
It's essential for consumers to be aware of these factors and take proper precautions to ensure that the pH of their alkaline water remains relatively stable. This may include storing the water in airtight, opaque containers, keeping it at a moderate temperature, and consuming it within a reasonable timeframe.
In conclusion, the pH level of alkaline water is not a static characteristic; it can change over time due to various factors such as exposure to air, light, temperature, and the container used for storage. To enjoy the potential benefits of alkaline water, it's crucial to be mindful of how it is stored and consumed. Always check the label for any specific recommendations provided by the manufacturer regarding storage and shelf life.