Supply

UNEP-IETC: maESTro2 - Database of technologies that are environmentally sound (Online database)
maESTro is a free searchable directory of Environmentally Sound Technologies (EST). It has been developed for decision makers in local and national governments and other organizations. It is a global repository of information on ESTs. The information provided is intended to improve decision-making processes regarding EST selection, transfer, adoption and use.

Access maESTro to search for technologies on water supply technologies
http://www.unep.or.jp/maestro2/