Brackish water is considered to be between how many Total Dissolved Solids (TDS)?

Brackish water is defined as water that has a higher salinity than freshwater but lower salinity than seawater. It typically contains Total Dissolved Solids (TDS) in the range of 1,000 to 10,000 milligrams per liter (mg/L). This salinity level comes from the mixing of freshwater and seawater, such as in estuaries or coastal regions where freshwater from rivers meets the ocean.

Understanding this classification is important for water quality management and treatment processes, as the salinity level influences the treatment needs and the types of organisms that can thrive in that environment. The identification of brackish water is crucial for operators to ensure proper management practices are followed, particularly when it comes to blending different water sources or treating the water for specific uses.

The other ranges listed do not accurately reflect the definition of brackish water, as they either fall within the range of freshwater (which is typically less than 1,000 TDS) or exceed the salinity levels associated with seawater (which usually has a TDS of around 35,000 mg/L or more).