Ozone Solubility In Water

Posted by Ozone Solutions on 24th Nov 2021

Ozone Solubility in Water

Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.

One gas that everyone is familiar with is oxygen or O2. We breathe it every day, but so do fish who live under water. This means that O2 is soluble with the water. Ozone gas (O3) is 13 times more soluble in water than O2 gas!

Water at 86°F (image on left) will have less ozone bubbles than water at 50°F (image on right).

Conditions Which Affect the Solubility Level of a Gas into Water.

  1. Temperature of the Water (See example pictures above)
  2. Water Pressure - Water that is at 35 psi will have twice the solubility of water at 10 psi
  3. Pressurized Gas - Gas that is at an increased pressure, being applied into the water, which is also under an increased pressure, will increase the solubility (See the “Pressurized Ozone Gas” pictures below)
  4. If the gas that you are placing into the water is at an increased concentration, this will allow additional solubility
  5. The efficiency of the device whose purpose is to dissolve the ozone into the water


Higher water pressures result in higher dissolved ozone levels. Additionally, colder water will help to increase solubility. When the water temperature is very cool (our  WIS injection systems use a water chiller to lower the temperatures adequately) and both the gas and water are pressurized, and there is a sufficiently high concentration of ozone gas, the solubility can be anywhere from 90-99% efficient!