Greywater is wastewater produced by hand sinks, showers, baths and washing machines which may be effectively harvested for secondary use, such as irrigation needs or flushing toilets. Greywater is distinguished from Blackwater (kitchen sinks and toilets) and Clearwater (AC or Evaporative Cooler condensate). Though all three types of water have their appropriate secondary use, Greywater is exceptionally valuable for its ability to offset potable water use while serving as a teaching tool on human habits of consumption.
- California website including system examples, codes, installers and more for greywater, rainwater harvesting, and composting toilets.
- A USU Fact Sheet outlining how greywater systems work and the current code in Utah.