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