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