"cmiles3" wrote:

There is a wetland type of treatment system, where you use vegetation
to treat the effluent. Works, but isn't suitable for some climates,
and is not generally accepted by most communities.

There's a small community nearby the has one of these and it's a huge problem.
They can't seem to get the amount of effluent balanced against the wetland area
and end up with all the vegetation dying off once a year.