Salinity

n. quality of containing salt; similarity to salt; saltiness

Salinity is the saltiness or dissolved salt content of a body of water. Salinity in Australian English and North American English may refer to salt in soil (see soil salination).
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Noun
1. the taste experience when salt is taken into the mouth
(synonym) salt, saltiness
(hypernym) taste, taste sensation, gustatory sensation, taste perception, gustatory perception
2. the relative proportion of salt in a solution
(synonym) brininess
(hypernym) saltiness

(n.)
Salineness.
  

The percentage of salt in water.