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