Four stages of water

Filed under: Social Activism, Vegtable soup by Kevin Griffiths — Leave a comment

May 31, 2026

While we commonly think of water as having three stages (solid, liquid, and gas), the “fourth stage of water” often refers to plasma when discussing the fundamental states of matter. However, within the context of water specifically, it’s more nuanced.
Here’s a breakdown:
* Solid (Ice): Water molecules are rigidly bound in a crystal lattice.
* Liquid (Water): Molecules are more loosely bound and can move past each other.
* Gas (Steam/Water Vapor): Molecules are far apart and move randomly.
When people talk about a “fourth stage of water,” they might be referring to a few different concepts:
* Plasma: If you heat water vapor to extremely high temperatures, the molecules can break apart, and the atoms can become ionized (electrons are stripped from the nuclei). This superheated, ionized gas is plasma, which is indeed considered the fourth fundamental state of matter. This is not a common state for water under everyday conditions.
* Supercritical Fluid: At very high temperatures and pressures (above its critical point), water can exist as a supercritical fluid. In this state, it has properties of both a liquid and a gas, diffusing like a gas but dissolving substances like a liquid. While distinct, it’s generally considered an extension of the fluid phase rather than a completely separate “stage” in the same way solid, liquid, and gas are.
* Exclusion Zone (EZ) Water / Structured Water: This is a more controversial concept, primarily popularized by Dr. Gerald Pollack. He proposes that water adjacent to hydrophilic surfaces can form a structured, ordered layer with different properties than bulk water. He sometimes refers to this as “EZ water” or “structured water” and suggests it acts like a liquid crystal, having a more ordered hexagonal structure. While intriguing, this concept is still an area of active research and not universally accepted as a distinct “fourth phase” in the traditional scientific sense.
In summary, if you’re looking for the generally accepted “fourth state of matter” in the scientific community that water can achieve under extreme conditions, it’s plasma. However, if you encounter the term in other contexts, it could refer to supercritical water or the more speculative “EZ water.”