Research And Insight

Brackish water

Brackish water is water that has more salinity than fresh water, but not as much as seawater. Salinity expresses the saltiness or dissolved salt content of a body of water. Technically, brackish water contains between 500 and 30,000 ppm salt, usually expressed as 0.05 - 3.0 %.

The concentration of dissolved salts in water partly determines the conductivity when the salt ionises in solution. Electrical conductivity of a water sample is used as an indicator of how salt-free or impurity-free the sample is: the purer the water, the lower the conductivity.

Water salinity based on dissolved salts

  • Fresh water
    < 0.05 %
    < 500 ppm
  • Brackish water
    0.05 - 3.0 %
    500 - 30,000 ppm
  • Saline water
    3.0 - 5.0 %
    30,000 - 50,000 ppm
  • Brine
    > 5.0 %
    > 50,000 ppm

Grundfos supplies a broad range of wastewater pumps that match the requirements when pumping the dissolved salt concentrations found in brackish water.