Elisabeth,
yes, this is extremely helpful, thank you!

Dear Sean,

Your posting is a bit unclear, what are you looking for exactly?

If you mean a listing of where UDDTs have been implemented worldwide then please look at our list of worldwide ecosan projects (compiled by GIZ), see here:
www.susana.org/lang-en/case-studies (scrol down to bottom right)

Or directly on the GIZ website here:
www.gtz.de/en/themen/umwelt-infrastruktur/wasser/30631.htm

As you can see in the Excel file (to be found under the link above) we have estimated 1.4 million users of UDDTs (whether it is double or single vault). As you can imagine, this number is next to impossible to determine accurately, but I think our analysis is the most accurate which I have seen (and has taken weeks and months of interns in my team working on all the 313 projects which are given in the list!).

Is this what you meant, does it help?

Regards,
Elisabeth

Looking for a breakdown of the actual systems implemented (world wide) and current usage. The follow up is really on the success of any one system- but that have deeper implications.