Infection Control · single question
What is the acceptable microbial level for dental unit waterlines?
Show answer and explanation
Correct answer: A. ≤500 CFU/mL
- A. Correct. CDC/EPA guidance sets ≤500 CFU/mL of heterotrophic bacteria as the standard for dental treatment water.
- B. 500–1000 CFU/mL exceeds the recommended ceiling.
- C. 1000–2000 CFU/mL is well above the acceptable limit.
- D. There is a defined limit; "no limit" is incorrect.
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