5 Best Alkaline Water Filters in 2025

Are you wondering how to improve your health and wellness? If so, you’ve probably heard people talking about alkaline water. So, let's dive in and talk about what alkaline water filters are all about. We'll break down what the pH scale actually means for your drinking water and look at the potential benefits you hear about.

We’ll also walk you through the different kinds of filters available to help you get a clearer picture of which one might be the best fit for you and your home.

You might remember the pH scale from your school days. It’s basically a way to measure how acidic or alkaline something is, on a scale that runs from 0 to 14. A pH of 7 is considered neutral, anything below that is acidic and anything above 7 is alkaline.

This is really important when you consider different water sources. Rainwater, for example, is naturally acidic and typically has a pH between 5.0 and 6.0. Over time, this acidic water can eat away at the copper pipes in your home, which is what causes those tell-tale blue-green stains you might see in your bath or basins. Because of this, the goal is often to raise the pH of your water to a neutral 7.

On the other hand, groundwater or bore water can be the opposite, with a high amount of minerals like calcium and magnesium, making it 'hard' and more alkaline. While the tap water in Australia is generally fine to drink, many people choose to use a filter to create cleaner, healthier water with a specific pH level, often between 7.5 and 9.5.

In a nutshell, alkaline water filters work by raising the pH level of water that runs through them. For water that's acidic, they add vital minerals back in to raise the pH. Even with bore water that's already full of minerals, some systems are designed to create a high alkaline pH reading between 8 and 9.5.

People are drawn to alkaline water for a few key reasons, often looking for high pH water for specific health benefits. Here are some of the things that get people talking:

• Helping to Balance Your Body’s pH: Our bodies are capable of keeping their own pH levels in check. However, the thinking is that modern diets, which are often heavy on acidic foods, can sometimes throw this natural balance out of whack. Drinking alkaline water might help to gently neutralise some of that excess acidity.

• Better Hydration: It’s thought that alkaline water could be absorbed more easily by the body. The theory is that its molecular structure could be a little smaller, which may help you hydrate more efficiently and give your energy levels a nice little lift.

• May Lend a Hand with Digestion: Some people find that drinking alkaline water helps with stomach troubles like acid reflux. By neutralising extra acid in the stomach, it might make it easier for your body to break down food and soak up all the good nutrients.

• A Little Boost for Your Immune System: Alkaline water can contain minerals and antioxidants that may help support your immune system and protect your body from oxidative stress.

• Healthier Skin: By helping to reduce inflammation and oxidative stress, some people feel that alkaline water improves their skin’s health and appearance, giving them a bit of a glow.

Ultimately, choosing an alkaline water filter is a personal decision. It’s always a great idea to weigh up the potential benefits and find a high-quality filter that suits your needs and budget. You’ll certainly find some fantastic options right here with us at My Water Filter.

When you start looking around, you’ll find there are a few different types of alkaline filters to get your head around:

• Mineral Filters: These are pretty straightforward. They use natural minerals, like calcium and magnesium, to raise the water's pH as it flows through the cartridge.

• Reverse Osmosis (RO) Filters: These systems are great at stripping out contaminants and minerals. They’re our number one recommendation for removing nitrates. Then, they add healthy minerals back in to create beautifully fresh, alkaline water.

• Ionising Filters: These use a clever process called ionisation. The water passes over electrically charged plates, which separates it into alkaline and acidic streams.

This system is designed to remove all nitrates and other contamination to provide you with clean, great-tasting water. The reverse osmosis (RO) membrane is where the magic really happens, as it can effectively remove up to 95% of nitrates from your water.

The only thing to know is that this process also strips out the good minerals, which can cause the pH to drop. To sort this out, the water then flows through special cartridges that add minerals back, bumping the pH right back up to a lovely alkaline level of 8 to 9.5. The clean water is kept in a storage tank, and because all the chlorine has been removed, there's a risk of bacteria growing in there, so you might need a UV light to keep it sterile.

This 5-stage system also delivers incredibly pure, fresh water. The RO membrane divides the water into a pure stream and a wastewater stream, taking heavy metals, fluoride and other contaminants with it.

Just like its 7-stage big brother, this process can make the water a bit acidic. So, after the water is purified, it sits in a 12-litre storage tank until you’re ready for a drink. As you turn on the faucet, the water flows through an alkaliser cartridge, raising the pH to between 8 and 9.5. A final carbon cartridge polishes the taste, leaving you with fantastic drinking water.

The Aragon cartridge is one of the best you can get and is a must if you want an extra layer of protection. It’s a fantastic choice for creating safe, high-quality drinking water, brilliant at removing things like chlorine, heavy metals, pesticides, bacteria, viruses and sediment. It's so effective, you can get completely safe and clean water without needing to boil it first.

NOTE: Please get in touch with Sales at 02 5562 0255 if you need Low Alkaline.

Now, this one is a bit different. The UltraStream is a natural water ioniser that does much more than just filter. It infuses your water with a massive amount of hydrogen gas and magnesium. It’s an extreme filtration system made in the US with world-class filter media that reduces fluoride by up to 80% and lasts for up to 3,000 litres. Its standout feature is the hydrogen infusion, and it also adds minerals to give the water a beneficial alkaline pH of 8–10.

The Filteroo® Steel is a fantastic gravity-fed system that not only looks great but also creates beautiful-tasting, healthy water. Whether you're using rainwater or tap water, the Filteroo® does a brilliant job of filtering it. Its gentle, gravity-based filtration gives the water plenty of contact time with the filter media, which is key for removing unwanted contaminants. If you notice the water flow slowing down, it's likely just sediment that's collected on the outside of the cartridge.

With a few great options to consider, it can feel like a big decision! Here are some key things to keep in mind to help you find your perfect match:

• Type of Filter: Think about what you really need. A reverse osmosis system will give you the highest level of contaminant removal. Also, have a think about whether you want a system neatly tucked away under the sink or one that sits on your benchtop.

• pH Level: Different filters produce different pH levels. If you have a particular level you’re aiming for, choose a filter that can get you there.

• Cost: Prices can vary quite a bit, and RO systems can be expensive. It's a good idea to have a budget in mind and don't forget to check the price of the replacement cartridges, too.

• Maintenance: All filters need their cartridges changed, usually about once a year. For some types, like ceramic cartridges, you can simply take them out and give them a scrub if the flow slows down.

• Contaminant Removal: Consider what type of contaminants you want to remove. Whether that's PFAS, chlorine or microplastics, it's important to know which type of contaminant you want to get rid of to select the appropriate water filter to address that.