Art Ludwig – Greywater Sources, Qualities, and Quantities, from his Create an Oasis with Greywater, describes the various sources of household greywater, the quality of greywater from each source, ways to improve this quality, and expected greywater yields.

Art Ludwig – Greywater Assessment, also from Create an Oasis with Greywater, tells you how to assess potential treatment areas of your yard for disposal of greywater, as well as how to assess your plants’ irrigation needs, and how much of these needs can be met with greywater.