CERTIFIED POOL OPERATOR CPO HANDBOOK
2026 WATER CHEMISTRY AND SAFETY
ASSESSMENT STUDY GUIDE COMPLETE
QUESTIONS AND ANSWERS
◉ RWI stands for. Answer: Recreational Water illness
◉ How are recreational water illnesses spread. Answer: Swallowing
water
Breathing in mists
Coming in contact with contaminated water
◉ Recreational Water Illness. Answer: illness caused by
microorganisms and chloramines in water
◉ common illness caused by chloramines. Answer: Breathing
disorder called swimmers asthma
◉ examples of microorganisms that can make you sick in pools.
Answer: Pseudomonas aeruginosa
E.coli
Staph
, Crypto
◉ interior walls of pool. Answer: pool plaster or white coat
◉ what do pool pumps do?. Answer: They poll water form the pool
main drains and skimmers
◉ pool main drain. Answer: point of strongest suction in the pool
◉ Reasons to close pool immediately. Answer: Main drain cover is
broken or missing
Main drain is not visible due to cloudy water
pool telephone not working
◉ Skimmers. Answer: water from surface passes through skimmers
and debris get trapped in skimmer basket
◉ Skimmer Weir. Answer: prevents floating debris from reentering
the pool
◉ where does water go after going through the pump?. Answer:
filter
2026 WATER CHEMISTRY AND SAFETY
ASSESSMENT STUDY GUIDE COMPLETE
QUESTIONS AND ANSWERS
◉ RWI stands for. Answer: Recreational Water illness
◉ How are recreational water illnesses spread. Answer: Swallowing
water
Breathing in mists
Coming in contact with contaminated water
◉ Recreational Water Illness. Answer: illness caused by
microorganisms and chloramines in water
◉ common illness caused by chloramines. Answer: Breathing
disorder called swimmers asthma
◉ examples of microorganisms that can make you sick in pools.
Answer: Pseudomonas aeruginosa
E.coli
Staph
, Crypto
◉ interior walls of pool. Answer: pool plaster or white coat
◉ what do pool pumps do?. Answer: They poll water form the pool
main drains and skimmers
◉ pool main drain. Answer: point of strongest suction in the pool
◉ Reasons to close pool immediately. Answer: Main drain cover is
broken or missing
Main drain is not visible due to cloudy water
pool telephone not working
◉ Skimmers. Answer: water from surface passes through skimmers
and debris get trapped in skimmer basket
◉ Skimmer Weir. Answer: prevents floating debris from reentering
the pool
◉ where does water go after going through the pump?. Answer:
filter
