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Optimal TDS Level for RO Water

You probably know that a reverse osmosis system should reduce your water’s total dissolved solids, or TDS.

But what’s the TDS level you should be aiming for after installing an RO system?

Total dissolved solids (TDS for short) refers to the combined concentration of all organic and inorganic substances, including minerals, salts, metals, chemicals, and other dissolved particles, that are present in a water source.

What Is TDS?

The TDS level of RO water should be in the range of 10 to 50 parts per million (PPM). This is the acceptable level – it tells you that each stage of the RO filtration process is working perfectly to reduce TDS in drinking water.

What TDS Level Should RO Water Be?

The best way to measure total dissolved solids from an RO unit is to use a digital TDS meter. A TDS meter is a handheld device that provides a quick and easy way to determine the concentration of dissolved solids in water.

How Can You Measure TDS From A Reverse Osmosis?

No, it’s highly uncommon for RO water to have zero TDS. Although reverse osmosis systems offer one of the most thorough filtration processes available, achieving a TDS reading of zero is not typical or necessarily desirable for drinking water.

Should RO Water Have Zero TDS?

Quality Of RO Membrane The quality of the reverse osmosis membrane is a factor that will determine how thoroughly your water is filtered, and therefore the TDS level of the RO water.

Factors Affecting The TDS Level Of RO Water

The age and condition of the RO membrane will also determine the TDS level of the purified water. The older a reverse osmosis membrane, the more worn and damaged the membrane surface.

Membrane Age & Condition

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