What Really Is a Freshwater Pool?

Many people hear the term freshwater pool and assume it simply means “no chlorine.” But that’s not quite accurate. True freshwater is defined by its purity and low dissolved solids, not just by what chemicals are added or avoided.

Let’s explore what freshwater really means — and how the Naked Freshwater System creates a low-TDS, comfortable, and easy-to-manage pool environment that feels natural and refreshing to swim in.

How Freshwater Is Defined

“Freshwater” isn’t a marketing term — it’s a scientific classification used globally. It’s based on how much material is dissolved in the water, known as Total Dissolved Solids (TDS).

TDS measures the concentration of minerals, salts, and metals in the water, expressed in parts per million (ppm).

Water Type TDS Range (ppm) Defined By
Freshwater 0 – 1,000 USGS, WHO, Australian Drinking Water Guidelines
Brackish Water 1,000 – 10,000 USGS / WHO
Saline Water 10,000 – 35,000 USGS / WHO
Seawater ~35,000 USGS / WHO

Simply put, any water under 1,000 ppm TDS is considered freshwater. Higher levels move into brackish or saline territory.

Where Naked Fits In

A Naked Freshwater Pool typically operates at:

  • TDS: around 800–1,000 ppm
  • Salt: roughly 500 ppm

This keeps Naked pools comfortably within the freshwater range — far lower in dissolved solids than saltwater or mineral systems. The result is soft, balanced water that feels closer to natural fresh water than traditional pool types.

Pool Type Typical TDS (ppm) Salt Level Classification
Naked Freshwater Pool 800–1,000 ~500 ppm ✅ Freshwater
Mineral Pool 1,500–3,000 1,000–2,000 ppm Brackish
Saltwater Pool 4,000–6,000 3,000–5,000 ppm Saline
Seawater ~35,000 ~35,000 ppm Marine

How the Naked Freshwater System Works

The Naked System uses a unique combination of natural processes to help keep your pool water clear, balanced, and comfortable, while maintaining very low levels of dissolved solids. These processes work alongside regular pool maintenance and oxidation to maintain overall water quality.

1. Ionisation Technology

A small control unit releases trace amounts of natural elements into the water. These help to maintain balanced water conditions and reduce the reliance on traditional high-salt or high-chlorine treatments.

2. Oxidisation

Gentle oxidation assists in breaking down organic matter such as oils, lotions, and debris, helping keep the water looking clean and clear.

The result is a balanced, low-TDS pool environment that feels smooth, light, and refreshing — often described by swimmers as “just like fresh spring water.”

Why Other Systems Aren’t Freshwater

Many systems marketed as “mineral freshwater” or “low-salt” still rely on large amounts of salt or minerals to operate. That pushes their TDS levels far above the freshwater threshold, typically between 1,500 and 6,000 ppm — making them technically brackish or saline.

Higher TDS means heavier water, more maintenance, and a less “fresh” feel overall. Naked pools stay well below that range, giving you genuinely fresh, soft-feeling water that’s easy on your skin, eyes, and pool surfaces.

The Freshwater Difference You Can Feel

  • Soft, natural water feel
  • No salty taste or residue
  • Gentle on skin, hair, and eyes
  • Reduced need for added balancing products
  • Minimal impact on equipment and finishes

It’s the closest you can get to swimming in clean, natural water — right in your own backyard.

In Summary

Feature True Freshwater (Naked) Mineral Pool Salt Pool
TDS 800–1,000 ppm 1,500–3,000 ppm 4,000–6,000 ppm
Salt Level ~500 ppm 1,000–2,000 ppm 3,000–5,000 ppm
Water Management Ionisation + Oxidisation Chlorine Generation Chlorine Generation
Water Feel Soft, natural Slightly salty Salty

Bottom line: Naked Pools operate in true freshwater range — offering soft, low-TDS water and a more enjoyable, natural swimming experience.

Make the Switch to Freshwater

Experience the difference for yourself. Learn more about the Naked Freshwater System and see why so many pool owners are choosing a cleaner, softer, and more sustainable way to swim.

Ready to swim fresh?
Contact Us Today or Find a Naked dealer near you.

Frequently Asked Questions About Freshwater Pools

What is a freshwater pool?

A freshwater pool is defined by its low level of total dissolved solids (TDS) — less than 1,000 parts per million (ppm). This means the water contains very little salt, minerals, or other dissolved materials. Freshwater pools, like the Naked system, deliver soft, clear water that feels natural and gentle to swim in.

How is TDS measured in a pool?

Total Dissolved Solids (TDS) is measured using a digital meter or test kit that reads the amount of dissolved material in the water, expressed in parts per million (ppm). A lower reading means the water is closer to natural freshwater quality.

What is the TDS level of a Naked Freshwater Pool?

A typical Naked Freshwater Pool has a TDS of around 800–1,000 ppm, with approximately 500 ppm of salt. That places it well within the official definition of freshwater, as outlined by the World Health Organization and Australian Drinking Water Guidelines.

How does a Naked Freshwater Pool differ from a salt or mineral pool?

Salt and mineral pools usually operate at much higher TDS levels — from 1,500 up to 6,000 ppm — which makes them technically brackish or saline, not freshwater. Naked pools stay below 1,000 ppm, giving the water a softer, lighter, and more natural feel.

Does a freshwater pool still need water care?

Yes. All pools require proper water balance and regular care to maintain clarity and comfort. The Naked system helps maintain this balance naturally, while keeping TDS low for a truly fresh swimming experience.

Is a Naked Pool considered a freshwater system?

Yes. Based on internationally recognised definitions, a Naked Pool’s TDS range of 800–1,000 ppm means it qualifies as freshwater. The small amount of salt present is simply used to assist system operation — not to create saltwater conditions.