WATER OPERATOR CERTIFICATION
STUDY MATERIAL (NEW MEXICO)
EXAM QUESTIONS AND DETAILED
ANSWERS. EXPERT VERIFIED FOR
GUARANTEED PASS.
What is MCL? - ANS Maximum Contaminent Level (MCL)
A public water system is any system that serves a population greater that or equal to ? -
ANS 15 services connections or 25 people regulary
What is the Maximum total chlorine residual allowed by the Disinfectant-Disinfection By-
Prouducts Rule - ANS 4 mg/l
What type of contaminant is Iron? - ANS Secondary
Which Primary Contaminant is sometimes added to water supplies to prevent tooth decay? -
ANS Fluoride
The Failure of a public water system to comply with the NM Drinking Water Regulations must
be reported to NMED within? - ANS 48 hours
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, The MCl for Total Trihalomethanes is? - ANS 0.1mg/l
SDWA sampling results must be reported to ? - ANS New Mexico Enviroment Department
(NMED)
Ground water systems must sample for inorganic chemicals every? - ANS (3) Three Years
The SDWA Compliance Cycle for Standardized Monitoring Rule consists of Three? -
ANS 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? -
ANS 40 or less then 5% on monthly samples
What are the action levels for Lead and Copper? - ANS 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? - ANS 5 samples
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and
still meet requirements ? - ANS 0.1 %
which Primary Inorganic Contaminant poses an immediate health risk? - ANS Nitrates
Why do Nitrates poses immediate health risk? - ANS Pregnant mothers and infants under 18
months can develop a condition known as Blue Baby Syndrome
What is Blue Baby Syndrome? - ANS The Presence of Nitrates in the bloodstream that
reduces oxygen uptake that gives the skin a blue tint
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
STUDY MATERIAL (NEW MEXICO)
EXAM QUESTIONS AND DETAILED
ANSWERS. EXPERT VERIFIED FOR
GUARANTEED PASS.
What is MCL? - ANS Maximum Contaminent Level (MCL)
A public water system is any system that serves a population greater that or equal to ? -
ANS 15 services connections or 25 people regulary
What is the Maximum total chlorine residual allowed by the Disinfectant-Disinfection By-
Prouducts Rule - ANS 4 mg/l
What type of contaminant is Iron? - ANS Secondary
Which Primary Contaminant is sometimes added to water supplies to prevent tooth decay? -
ANS Fluoride
The Failure of a public water system to comply with the NM Drinking Water Regulations must
be reported to NMED within? - ANS 48 hours
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, The MCl for Total Trihalomethanes is? - ANS 0.1mg/l
SDWA sampling results must be reported to ? - ANS New Mexico Enviroment Department
(NMED)
Ground water systems must sample for inorganic chemicals every? - ANS (3) Three Years
The SDWA Compliance Cycle for Standardized Monitoring Rule consists of Three? -
ANS 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? -
ANS 40 or less then 5% on monthly samples
What are the action levels for Lead and Copper? - ANS 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? - ANS 5 samples
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and
still meet requirements ? - ANS 0.1 %
which Primary Inorganic Contaminant poses an immediate health risk? - ANS Nitrates
Why do Nitrates poses immediate health risk? - ANS Pregnant mothers and infants under 18
months can develop a condition known as Blue Baby Syndrome
What is Blue Baby Syndrome? - ANS The Presence of Nitrates in the bloodstream that
reduces oxygen uptake that gives the skin a blue tint
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
