With a title like this I'll probably get lots of google hits and lots of spam. An interesting note: We had intended to use composting toilets in the Perry Road Project but in Vermont this allows you to reduce the size of the leech field by only 25%. They also require you to have the septic folks take your compost away every year. Another factor in our decision not to use composting toilets is the cost. This is a very low budget house and composting toilets are pretty pricey. We will probably go with Toto low flow toilets. These have a very good reputation.