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When it comes to drinking water, many people focus on clarity and taste, but pH is another key factor that’s often overlooked. The pH level of water refers to how acidic or alkaline it is. And while it may not seem like a major concern, it can indicate the quality and safety levels of the water, as well as its potential taste.

What Is pH and Why Does It Matter in Drinking Water?

pH refers to the measurement of the acid-base balance in water and is primarily regulated by the carbon dioxide–bicarbonate–carbonate equilibrium system. When the concentration of carbon dioxide increases, the pH level drops, making the water more acidic. Conversely, a decrease in carbon dioxide raises the pH, making the water more alkaline.

What Happens When the Water’s pH Is Too High or Too Low?

While regulatory bodies like PUB in Singapore work to maintain safe and balanced pH levels in drinking water, it’s helpful to understand what happens when water is too acidic or too alkaline.

Effects of Low pH (Acidic Water)

Water with a low pH (below 6.5) is typically more acidic and may contain high levels of toxic metals like lead, copper, or zinc, which can leach from metal pipes and plumbing fixtures. This can cause:

• A metallic or sour taste
• Blue-green staining on sinks, drains, and laundry
• Corrosion of pipes and household appliances
• Potential health concerns if contaminated by heavy metals or bacteria
• High levels of dissolved carbon dioxide and possibly harmful microorganisms

Effects of High pH (Alkaline Water)

Water with a high pH (above 8.5) is often considered “hard” and can lead to:

• An alkaline or bitter taste
• Scale buildup inside pipes, fixtures, kettles, and heaters
• Reduced water pressure and clogged piping due to mineral deposits
• Soap and detergent inefficiency, making it harder to clean dishes or laundry
• White spots or film on dishes, glassware, and sinks
• Reduced efficiency and potential damage to boilers, water heaters, and heat-exchange units, sometimes voiding warranties

While high-pH water doesn’t usually pose a direct health risk, its aesthetic and functional issues make regular monitoring and water treatment important for maintaining water quality in your home.

What Is the Ideal pH for Drinking Water?

In Singapore, the quality of drinking water is regulated under the Environmental Public Health (Water Suitable for Drinking) (No. 2) Regulations 2019. This is enforced by PUB, Singapore’s National Water Agency. These regulations are aligned with the World Health Organization (WHO) Guidelines for Drinking-Water Quality.

According to the EPH Regulations, the acceptable pH range for drinking water in Singapore is between 6.5 and 9.5. In practice, Singapore’s treated drinking water typically falls within a narrower range of 7.5 to 8.8, ensuring it remains safe, palatable, and non-corrosive to pipes and infrastructure.

How Can Water Dispensers with Filters Affect the pH of Drinking Water

Water dispensers with built-in filters can have a noticeable impact on the pH level of your drinking water. For example, dispensers equipped with activated carbon filters remove chlorine, organic compounds, and other chemicals, which may cause a slight increase in pH, resulting in more alkaline water.

This shift not only reduces the chlorine taste and odour but also affects the overall taste of the water, which some consumers may find more appealing. While the change in pH is generally minimal, it can still influence both the perceived quality and suitability of the water for daily use.

Have a Taste of Alkaline Water Yourself from an Alkaline Water Purifier from Purehan

If you’re looking to enjoy the benefits of alkaline water at home, an alkaline water purifier offers a smart and convenient alternative to costly bottled options. It gives you access to great-tasting water while saving you money in the long run.

A water purifier you can consider is the Purehan Super Cooling: Water Dispenser & Alkaline Water Purifier, which features a multi-stage filtration system.

1st Filter: Carbon Filter with 5-Step Filtration

This filter focuses on removing contaminants that affect taste, odour, and clarity:

• Sediment – Eliminates suspended solids, rust, and other visible particles
• Carbon Block – Removes chlorine and bad odours to improve the flavour
• Heavy Metal Removal – Targets and filters out four types of heavy metals
• Anti-Bacterial Layer – Inhibits the growth of bacteria
• Mineral Layer – Maintains the ideal pH level and enhances mineral content

2nd Filter: Neo Nano Clean Filter with 4-Step Filtration

This core filter enhances the water’s mineral profile while offering protection against microscopic contaminants:

• Sediment Layer – Removes floating particles and fine rust
• Positively Charged Layer – Neutralises bacteria and norovirus
• Post-Carbon Layer – Further removes odours and residual particles
• Silica Ball Layer – Improves taste and adds beneficial minerals

Other Features of the Purehan Super Cooling: Water Dispenser & Alkaline Water Purifier

Beyond water filtration benefits, this unit also offers up to 8 temperature settings and 5 output options. This allows you to enjoy your water at your preferred temperature, whether it’s ice-cold, room temperature, or hot enough for tea or coffee.

This filter water dispenser also offers minimal maintenance, thanks to built-in auto-sterilisation systems. Both the faucet and internal water pipes are kept clean through UV and electrolysis sterilisation, helping to maintain hygiene and prolong performance.

With a system like this, enjoying refreshing alkaline water becomes effortless, making it perfect for daily hydration or crafting your favourite beverages.

For more water purifier insights, check out our guide on how to choose a water purifier for your home.