What value should be used for the constant when total dissolved solids (TDS) is found to be between 1,000 and 2,000 ppm?

When the total dissolved solids (TDS) in water is found to be between 1,000 and 2,000 ppm, the correct constant to use is 12.2. This constant is necessary for converting TDS values to more usable measurements, such as calculating the water's conductivity, which is a critical factor in assessing water quality in a pool.

Using the appropriate constant ensures accurate calculations for maintaining proper chemical balance and ensuring safe water conditions for pool users. If using a constant that is too high or too low, it can lead to misinterpretations of the water quality and could affect pool maintenance protocols, potentially compromising safety and comfort for swimmers.

In practice, 12.2 is a standard constant recognized in the industry for this specific range of TDS values, making it essential for pool operators to understand and apply this knowledge correctly. The other values provided do not align with established guidelines for TDS within this range and could lead to inaccuracies in assessments or procedures.