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CPO Certified Pool Operator Exam Latest Updates 2024/2025
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CPO Certified Pool Operator Exam Latest Updates 2024/2025
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CPO Certified Pool Operator Exam LatestUpdates 2024/2025
12 Reasons why the health inspector will close your pool ANS✔✔ 1. pump
filter not working for more than an hour
2. main drain is not visible
3. chemical readings out of range
4. no pool operator (15 minute grace period)
5. no lifeguard or cpr certs present
6. water is below the skimmer line
7. danger to the public
8. chlorinator is not working
9. health inspector is not allowed in
10. bathrooms + drains not working
11. flow rate is too low
12. no phone (landline)
Measuring records as the CPO ANS✔✔ Operator must test the water for Cl
and pH every hour, and Total Alkalinity, Calcium Hardness and Cyanuric Acid
once per week. Records must be maintained on site and available for at least
2 years at the pool and 3 years total.
5 Factors of Water Balance ANS✔✔ pH, Total Alkalinity, Calcium Hardness,
Temperature, and total dissolved liquids
Corrosive water ANS✔✔ pH is too low, dissolves everything it contacts
,scaling water ANS✔✔ pH it too high, mineral deposits on walls or pipes
Regulated pH range ANS✔✔ 7.2-7.8
pH reading is tested with Phenol Red
To lower pH, ANS✔✔ add muriatic acid
To raise the pH, ANS✔✔ add sodium carbonate (Soda Ash)
2. sodium bisulfate
3. carbon dioxide
Total Alkalinity ANS✔✔ represents the amount of carbonates, bicarbonates,
and hydroxides in a solution - you want this to be high, because the pH
resists changes in fluctuating
pH Bounce ANS✔✔ low alkalinity
Regulated Total Alkalinity range ANS✔✔ 60-180 ppm ideal goal is 100ppm
To lower Total Alkalinity, ANS✔✔ add muriatic acid
To raise Total Alkalinity, ANS✔✔ add Baking Soda
Calcium Hardness ANS✔✔ amount of calcium and magnesium in the water
(mineral content in water)
, Regulated calcium hardness range ANS✔✔ 150-400ppm
To raise Calcium Hardness, ANS✔✔ add calcium chloride
Total Dissolved Liquids (TDS) ANS✔✔ sum of all organic and inorganic
materials dissolved in the water- cannot be eliminated with a chemical-----
<1500 ppm allowed in water
Temperature ANS✔✔ Max temps = 88 for swimming pool
96 for therapy pool
104 for hot tub
Saturation Index ANS✔✔ -.5-.5
check once a week for a pool, everyday for a spa
Employees have the right to know: ANS✔✔ - may come into contact w/blood
-may come into contact w/ dangerous chemicals
- personal protection
- material safety data sheet
Cyanuric Acid (CYA) ANS✔✔ chemical used to stabilize an outdoor pool (not
UV light sensitive) added directly through the skimmer,
Regulated Cya levels ANS✔✔ 30-100 ppm
Sodium Hypochlorite NaOCl ANS✔✔ Liquid Chlorine, or bleach
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