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