The net production of potable water is difficult to estimate at this stage and depends on {HEAD ~ the government tolerance level} of Ca++, {TAIL ~ Mg++salts} after dilution 
The net production of potable water is difficult to estimate at this stage and depends on { HEAD ~ the government tolerance level } of Ca++ , { TAIL ~ Mg++salts } after dilution
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH