What is the term for water that flows out of a treatment or purification system?

The term "product water" refers specifically to the water that has been treated or purified through a system designed to remove impurities, contaminants, or other undesired substances. This type of water is suitable for its intended use, whether that be for drinking, irrigation, or industrial applications. The purification process enhances the quality of the water, making it safe and effective for various uses.

In contrast, raw water refers to untreated water that comes directly from natural sources such as rivers, lakes, or groundwater, and contains all the impurities present in those sources. Black water is wastewater that contains human waste, typically from toilets, and is highly contaminated, while gray water is slightly less contaminated wastewater from sinks, showers, and washing machines. These terms describe different states of water that do not reflect the treatment and purification aspects associated with product water.