I would suggest you contact ...

Published November 21, 2017 08:20 by Richard Garner, Director and Consultant at Garner Sustainability Consulting Services (Pty) Ltd

I would suggest you contact the Association of Energy Engineers (AEE) or go to their website and have a look (https://www.aeecenter.org/) there is some work done on water efficiency and training that includes the aspects you mention.