78 million mÂł of potable water unaccounted for last year – Oman An estimated 78.6 million cubic metres of potable water, representing 21.6 per cent of the total output of desalinated and groundwater handled by Omanâs Public Authority for Water (Diam), remained unaccounted for in 2018. Unaccounted for Water (UFW) âtypically attributed to leaks in underground pipeline systems, metering errors and unbilled metres â represents a significant share of Diamâs revenues and is the subject of intensive mitigation efforts. Those efforts helped bring down water losses linked to UFW from 24.3 per [âŠ] 78 million mÂł of potable water unaccounted for last year – OmanHIWI042019-07-05T09:03:30+02:00