Water that contains significant amounts of dissolved solids.
- Fresh water: less than 1,000 parts per million (ppm)
- Slightly saline water: from 1,000 ppm to 3,000 ppm
- Moderately saline water: from 3,000 ppm to 10,000 ppm
- Highly saline water: from 10,000 ppm to 35,000 ppm
See also Brine, Brackish Water.