Certified Pool Operator Class (CPO)
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      CPO Water Balance

      CPO Water Balance Values

      Download CPO Water Balance Sheet HERE

      Water Balance Values
      TOTAL ALKALINITY
      The measure of a substance's resistance to change of ph
      Acceptable Range: 60 – 180 ppm
      Ideal Range: 80 – 100 ppm for Sodium Hypochlorite, Calcium Hypochlorite
      100 – 120 ppm for Chlorine Gas, Trichlor, Dichlor

      pH
      The measure of whether a substance is an acid or a base
      Acceptable Range: 7.2 – 7.8
      Ideal Range: 7.4 – 7.6

      CALCIUM HARDNESS
      The measure of the Calcium Ions in the water
      Acceptable Range: 150 – 1000 ppm
      Ideal Range: 200 – 400 ppm
      HOT WATER FACILITIES: 150-250 ppm

      TEMPERATURE
      These are recommended ranges (temperature is not normally adjusted when doing S. I. problems)
      Competition 78 – 80 f
      Recreation 82 – 84 f
      Special Populations 86 – 88 f
      Spas Not to exceed 104 f

      TOTAL DISSOLVED SOLIDS
      The measure of all materials dissolved in the water (should not exceed 1500 ppm over starting
      level)
      S.I. Index Factor: Up to 1000 ppm use 12.1 Over 1000 ppm use 12.2