Backyard Aquaponics
A place to discuss aquaponics

Very Very good point.

Those curious about their state's current GW policy can look here first. And then look around the overall Oasis Designs site for lots of information. All that I know about greywater I learned from Art Ludwig's site and books.
There's also http://www.graywater.org/home.

I'm in Texas where the law is pretty enlightened, it's even better in Arizona.