Water Operator Certification Study
Material ( New Mexico) Most Recent
exam 2026 Questions and Answers
What is MCL? - Correct answer-Maximum Contaminent Level (MCL)
A public water system is any system that serves a population greater that or equal
to ? - Correct answer-15 services connections or 25 people regulary
What is the Maximum total chlorine residual allowed by the Disinfectant-
Disinfection By-Prouducts Rule - Correct answer-4 mg/l
What type of contaminant is Iron? - Correct answer-Secondary
Which Primary Contaminant is sometimes added to water supplies to prevent tooth
decay? - Correct answer-Fluoride
The Failure of a public water system to comply with the NM Drinking Water
Regulations must be reported to NMED within? - Correct answer-48 hours
The MCl for Total Trihalomethanes is? - Correct answer-0.1mg/l
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, SDWA sampling results must be reported to ? - Correct answer-New Mexico
Enviroment Department (NMED)
Ground water systems must sample for inorganic chemicals every? - Correct
answer-(3) Three Years
The SDWA Compliance Cycle for Standardized Monitoring Rule consists of
Three? - Correct answer-Compliance Periods
How many bacterilogical samples(BAC-T) must be taken every month before a
system is allowed to have TWO positive samples without violating the drinking
water standard? - Correct answer-40 or less then 5% on monthly samples
What are the action levels for Lead and Copper? - Correct answer-0.015 mg/l Lead
1.3 mg/l Copper
If Bacteriological retakes are done this month what is the minimum number of
samples that must be turned in next month? - Correct answer-5 samples
if a 3-log removal is required for Giardia Lamblia what percentage of organisms
can survive and still meet requirements ? - Correct answer-0.1 %
which Primary Inorganic Contaminant poses an immediate health risk? - Correct
answer-Nitrates
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Material ( New Mexico) Most Recent
exam 2026 Questions and Answers
What is MCL? - Correct answer-Maximum Contaminent Level (MCL)
A public water system is any system that serves a population greater that or equal
to ? - Correct answer-15 services connections or 25 people regulary
What is the Maximum total chlorine residual allowed by the Disinfectant-
Disinfection By-Prouducts Rule - Correct answer-4 mg/l
What type of contaminant is Iron? - Correct answer-Secondary
Which Primary Contaminant is sometimes added to water supplies to prevent tooth
decay? - Correct answer-Fluoride
The Failure of a public water system to comply with the NM Drinking Water
Regulations must be reported to NMED within? - Correct answer-48 hours
The MCl for Total Trihalomethanes is? - Correct answer-0.1mg/l
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, SDWA sampling results must be reported to ? - Correct answer-New Mexico
Enviroment Department (NMED)
Ground water systems must sample for inorganic chemicals every? - Correct
answer-(3) Three Years
The SDWA Compliance Cycle for Standardized Monitoring Rule consists of
Three? - Correct answer-Compliance Periods
How many bacterilogical samples(BAC-T) must be taken every month before a
system is allowed to have TWO positive samples without violating the drinking
water standard? - Correct answer-40 or less then 5% on monthly samples
What are the action levels for Lead and Copper? - Correct answer-0.015 mg/l Lead
1.3 mg/l Copper
If Bacteriological retakes are done this month what is the minimum number of
samples that must be turned in next month? - Correct answer-5 samples
if a 3-log removal is required for Giardia Lamblia what percentage of organisms
can survive and still meet requirements ? - Correct answer-0.1 %
which Primary Inorganic Contaminant poses an immediate health risk? - Correct
answer-Nitrates
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
