The wastewater produced from baths and showers, clothes washers, and lavatories. Constitutes 80% of household waste water and can be recycled effectively into garden irrigation and in some cases, water for toilet systems
Water that is considered waste and not to be used for cleaning milking systems. Usually including recycled water from a lagoon or milk house waste. Even water only used to cool milk in a plate cooler is considered gray water, though it is often fed to cows to reduce total usage.
Category 2, Gray Water, can pose health risks and can contain significant levels of chemical and biological contamination. Examples of gray water are water discharged from dishwashers, washing machines, sinks, showers, aquariums and waterbeds.
Wastewater from sinks, showers, kitchens, washers, etc. Unlike black water, gray water does not contain human waste. Typically gray water, after purification, is used for non-potable uses such as flushing, irrigation, etc.