How does the ionization of water probably begin?

The ionization of water likely begins when a water molecule (H₂O) undergoes a process of self-ionization, where it dissociates into a hydrogen ion (H⁺) and a hydroxide ion (OH⁻). This occurs due to the polar nature of water molecules, which can facilitate the transfer of protons between them. The equilibrium established between the ions and unionized water molecules is crucial for the properties of water and its role as a solvent. In pure water, this ionization is minimal, resulting in very low concentrations of H⁺ and OH⁻ ions.