Technically , brackish water contains between 0.5 and 30 grams of salt per litre -- more often expressed as 0.5 to 30 parts per thousand ( ppt or ‰ ) , which is a specific gravity of between 1.005 and 1.010 .
Technically , brackish water contains between 0.5 and 30 grams of salt per litre -- more often expressed as 0.5 to 30 parts per thousand ( ppt or ‰ ) .