Maybe this was the wrong way to think about things, but my interest in composting toilets was taken down a notch when I started thinking about the water use in everything… food, and the manufacture of things. Not just flushing, showering, etc. Now, I know composting toilets is not all about water use. But that is certainly part of it. For our part, we have 0.8/1.6 dual flush toilets, so that’s not bad I reckon.
So back to water intensity. For instance, here is a chart of the “water intensity” of some common food items: LINK
And here is a radio program discussing, among other things, the amount of water needed to make a pair of shoes or Levi 501 jeans. LINK