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Pool Turnover Rate - CPO® Math Tutorial

The standard for a swimming pool is 6 hours. This pool is well within the code standards. Remember, always operate in compliance with your local or state code requirements.

Things to know about Turnover Rate

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Codes require more than one turnover per day:
The common accepted standards for one turnover are:

  • Pools - 6 hours
  • Spas - 30 minutes
  • Wading pools - between 1 and 2 hours
  • Therapy pools - 2 hours
  • Hospital and health club pools - as low as hours
To achieve the required Turnover Rate (TR), there must be sufficient flow of water or Flow Rate (FR)

Formula for Turnover Rate:

  • Divide the pool shape into areas of constant depth, or constant slopes.
  • Turnover Rate(TR) = Gallons divided by Flow Rate (FR) divided by 60.

    Flow Rate (FR) is measured by a flow meter.
Example:

  • You have a 65,000 gallon pool, and the flow meter is reading
    240 GPM (gallons per minute). What is the Turnover Rate (TR)?


    Turnover Rate(TR) = Gallons divided by Flow Rate (FR) divided by 60
    Gallons = 65,000; FR = 240 GPM
TR = ÷ ÷ 60 =

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