Water Classifications Water Classifications

The "Glossary of Salt Water" published by the Water Quality Association classifies water as follows:

Fresh: <1,000 ppm TDS
Brackish: 1,000-5,000 ppm TDS
Highly Brackish: 5,000-15,000 ppm TDS
Saline: 15,000-30,000 ppm TDS
Sea Water: 30,000-40,000 ppm TDS
Brine: 40,000-300,000+ ppmTDS

PPM: Parts per million
TDS: Total Dissolved Solids
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