What does the term "total dissolved solids" (TDS) refer to in pool water?

Total dissolved solids (TDS) refers to the sum of all organic and inorganic substances that are dissolved in water. This includes a variety of particles such as minerals, salts, metals, and any other compounds that can be found in solution. TDS is an important measurement for maintaining water quality in pools, as it provides an overall indication of the water's composition and can affect water clarity, comfort for swimmers, and the effectiveness of sanitizers.

High levels of TDS can lead to various issues, including cloudy water and irritation for swimmers. Monitoring TDS helps pool operators determine when water changes are necessary, as elevated TDS levels can signify that the water is becoming unbalanced or that water replacement may be needed.

Understanding TDS is fundamental for maintaining proper water chemistry and ensuring a safe, clean swimming environment, which is why identifying it as the sum of all dissolved substances is crucial for pool management.