Total Dissolved Solids in Pool Water

Total Dissolved Solids or TDS are the total amount of mobile charged ions, including minerals, salts or metals dissolved
in a given volume of water, referred to as parts per million (ppm). TDS is directly related to the quality and purity of the

The level of TDS in the pool is effected by the water hardness the chemicals added to adjust the pH, chlorine, alkalinity,
the dirt dust and human waste.  All these effect the level TDS in the pool.

The maximum acceptable level of TDS for swimming pools is 1,500 ppm.  When the TDS level rises above 1,500 ppm,
subtle problems will begin to occur such as brown manganese stains, salty tasting water, irritation to skin and eyes.  As
the TDS rises higher and higher, these problems magnify and the pool begins to deteriorate. The only practical way to
reduce TDS is to drain some if not all of the water from the pool (depending on how high the TDS is), and replace it with
fresh water . Regularly  backwashing the pool will help to prevent the TDS from rising too much.
Swimming Pool Maintenance Tips
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