Salinity's the saltiness or dissolved salt content of a body of water. It's a general term used to describe the levels of different salts such as sodium chloride, magnesium and calcium sulfates and bicarbonates. Salinity in Australian English and North American English may also refer to the salt content of soil (see soil salination). Definitions Water salinity Fresh water Brackish water Saline water Brine < 0.05 % 0.05 – 3 % 3 – 5 % > 5 % < 0.5 ppt 0.5 – 30 p… (More on Salinity)