Most people install a water filter to remove things they don’t want in their drinking water. Chlorine. Fluoride. Heavy metals. Microplastics. And more recently, PFAS, often referred to as "forever chemicals."
Reverse osmosis, or RO, is one of the most effective ways to do this. It’s trusted in hospitals, labs, and homes around the world. The process is so thorough, it doesn’t just take out the bad stuff. It removes almost everything.
That’s where the question comes in.
Can water be too pure?
What reverse osmosis actually removes
RO filtration works by pushing water through a very fine membrane. The pores are incredibly small. So small that even the tiniest contaminants get blocked. To give you a sense of scale, a human hair is about 75 microns wide. RO membranes filter down to 0.0001 microns.
That means fluoride is filtered out. So are PFAS, microplastics, lead, arsenic, nitrates, bacteria, and even some viruses. It’s one of the few filtration systems that handles all of it in one pass.
So yes, RO gives you very clean water.
But there’s something else it does.
It removes the good stuff too
In the process of removing contaminants, reverse osmosis also strips out naturally occurring minerals. Things like calcium and magnesium. These aren’t harmful. In fact, they’re beneficial. They also make a big difference in how water tastes and feels.
If you’ve ever had distilled water, you’ve probably noticed something. It can taste flat. It feels like something is missing. That’s because something is.
Some people call RO water too pure. Not because it’s unsafe, but because it’s empty. It lacks the natural minerals that your body expects and that give water its character.
So we put the minerals back
At Tappwater, we think you should get both purity and balance. That’s why our reverse osmosis system includes a final stage that adds minerals back into the water.
We use what we call Swedish mineral rocks. These are natural stones that slowly release calcium and magnesium into the water after it has been filtered. No additives. No artificial anything. Just the minerals your body already recognises, returned to the water in a simple, natural way.
The result is clean water that doesn’t taste flat. It tastes right. And people drink more of it.
Final thoughts
Reverse osmosis is one of the most powerful ways to clean your drinking water. It removes the things many people are concerned about, including fluoride and PFAS.
But water should also taste good. It should feel natural. That’s why remineralisation is part of what we do.
Clean water is great. Clean, balanced water is better.
If you're ready for water that’s both pure and refreshing, our new Reverse Osmosis Filter is available now in a limited first batch. No plumbing required. Just plug it in and start pouring.