Reverse Osmosis vs Water Softeners: What’s the Best Choice for Your UK Home?

Many UK homeowners are confused between water softeners and water filtration systems like reverse osmosis (RO). Although both improve water quality, they serve very different purposes. In this guide, we break down the key differences so you can choose the right solution for your household.

What Is a Water Softener?

A water softener is designed to remove minerals like calcium and magnesium that cause hard water. It works through an ion exchange process, replacing these minerals with sodium or potassium. The result: softer water that reduces scale build-up in appliances and pipes.

However, water softeners do not purify water or make it safer to drink. They do not remove contaminants such as chlorine, heavy metals, pesticides, or bacteria.

What Is Reverse Osmosis (RO)?

Reverse osmosis systems purify water by pushing it through a semi-permeable membrane that filters out up to 99% of contaminants. Aura’s RO systems feature multi-stage filtration that removes:

• Heavy metals (lead, arsenic, mercury)
• Microplastics and bacteria
• Chlorine and chloramine
• Pesticides, nitrates, PFAS and VOCs
• Excess sodium from softened water

Comparison Table: Water Softener vs Aura Reverse Osmosis System

Can I Use Both?

Yes! In fact, many homes with hard water benefit from using both systems:

• Water softener to protect appliances and reduce limescale
• RO system for pure, contaminant-free drinking water

If you already use a water softener, Aura’s RO system will remove the excess sodium it adds—making your drinking water both soft and safe.

Final Thoughts: Which System Do You Really Need?

If your priority is health, taste, and drinking water safety, a reverse osmosis system like Aura’s is essential. Water softeners serve a mechanical purpose, but they don’t provide the clean, pure water your family needs every day.