Cesspools and Septic law(s)?

[MarkP]

Locally you still need a leach field for the grey water from bath and washing machine. Furthermore I am pretty sure that drainage from the kitchen sink is considered black water (same as sewage) because of the amount of organic solids in it.

[ProjectDomecile]

I really doubt that. A greywater leach field is an entirely different beast, in terms of health risks, and even with organic solids what makes blackwater 'black' is the human waste.

[ProjectDomecile]

Huh. Nope, looks like you're right. That said, other than the toilet and the kitchen sink, the hawaii dept. of health does seem to allow greywater irrigation:

http://health.hawaii.gov/wastewater/file...ter_GL.pdf