From what I understand, greywater systems can be very simple--as simple as drainage from your house to water your garden. Of course, this requires not putting anything toxic/nonbiodegradable down your drains. I'd like to build someday with a greywater system and composting toilets.
The biggest issue, usually, with septic tanks is that building codes will require them. (Check with your municipality or, if outside city limits, your county for local codes).
The biggest issue, usually, with septic tanks is that building codes will require them. (Check with your municipality or, if outside city limits, your county for local codes).