high salinity; high salt content
Used in scientific, dietary, and environmental contexts to describe water, soil, or food with elevated salt levels.
A high-salt diet is not good for your health.
This lake is known for its high salinity.
低塩分 is the antonym, meaning 'low salinity' or 'low salt content'.
Compound of 高 (こう, 'high') + 塩分 (えんぶん, 'salt content').