Exam (elaborations)
AWWA chapter 1 Questions and Answers 2024
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Exam of 2 pages for the course AWWA at AWWA (AWWA chapter 1)
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AWWA chapter 1Which agency sets legal limits on the concentration levels of harmful contaminants in
potable water distributed to customers? - answerUnited States Environmental
Protection Agency
The number of monthly distribution system bacteriological samples required is: -
answerBased on population served
What is the maximum contaminant level for total trihalomethanes (TTHM) in the United
States? - answer0.080 mg/L
Under the Surface Water Treatment Rule, disinfection residuals must be collected at the
same location in the distribution system as... - answerColiform samples
Iron can cause "red water" and this customer complaints when its concentration is
above its secondary maximum contaminant level of... - answer0.30 mg/L
The goal of the Surface Drinking Water Act is for each ________ to accept primary
enforcement responsibility (primacy) for the operation of the state's drinking water
program. - answerState
What is the objective of the Total Coliform Rule? - answerTo promote routine
surveillance of distribution system water quality to search for fecal matter and/or
disease-causing bacteria
Which agency sets standards on the concentration levels of harmful contaminants I'm
drinking water? - answerUS Environmental Protection Agency
Explain the difference between the different tiers of violations. Which one is the most
serious? - answerTier 1 is an acute MCL violation requiring public notification within
within 24 hours. Tier 2 notification must occur within 30 days. Tier 3 requires notification
within 1 year.
A positive E. cool test must be reported to the primacy health agency within what time
period? - answer24 hours
How is the required number of monthly bacteriological samples determined? -
answerPopulation served
What is the action level for lead in first-draw samples taken from customer taps? -
answer0.015 mg/L
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