Water Operator Cer fica on Study Material ( New
Mexico) (Basic) Ques ons and answers LATEST
2025/2026 100% VERIFIED CORRECT
Maximum Contaminent Level - Correct Answers MCL
Public water system is a system that serves a popula on of ___ or more regularly - Correct
Answers 25
Maximum total chlorine residual ___ mg/l - Correct Answers 4
What type of contaminant is Iron - Correct Answers Secondary
Primary contaminant is some mes added to water supplies to prevent tooth decay - Correct
Answers Fluoride
The Failure of a public water system to comply with the NM Drinking Water Regula ons must
be reported to NMED within ___ hours - Correct Answers 48
MCL for Total Trihalomethanes ___ mg/l - Correct Answers 0.1
SDWA sampling results must be reported to - Correct Answers New Mexico Enviroment
Department (NMED)
Ground water systems must sample for inorganic chemicals every ___ years - Correct Answers
3
,The SDWA Compliance Cycle for Standardized Monitoring Rule consists of ___ Compliance
Periods - Correct Answers 3
___ or less than 5% bacteriological samples must be taken every month before a system is
allowed to have TWO posi ve samples without viola ng the drinking water standard? - Correct
Answers 40
Ac on level for Lead ___ mg/l - Correct Answers 0.015
If Bacteriological retakes are done this month what is the minimum number of samples that
must be turned in next month? - Correct Answers 5
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and
s ll meet requirements - Correct Answers 0.1
Primary Inorganic Contaminant poses an immediate health risk - Correct Answers Nitrates
The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a
blue nt - Correct Answers Blue Baby Syndrome
Primary Contaminant that shields harmful bacteria from disinfec on processes - Correct
Answers Turbidity
Device used to measure NTU's - Correct Answers Nephelometer
Turbidity is Measured with - Correct Answers Turbidimeter or Nephelometer
Chemical sampling results be kept ___ years - Correct Answers 10
, Bacteriological sampling results be kept ___ years - Correct Answers 5
Microorganisms whose presence in water indicates probable presence of pathogens. - Correct
Answers Indicator organism
White powder used to neutralize chlorine - Correct Answers Sodium Thiosulphate
To insure the water being sampled is from the main and not the customers plumbling - Correct
Answers Flush line
Number is used to determine how many Bac-t samples must be taken - Correct Answers
People served
Minimum number of Bac-T samples required each month? - Correct Answers 1
Any me the MCL is exceeded and fecal coliform posi ve results come back from any of the
samples - Correct Answers Non-acute viola on
If retakes are required this month what is the minimum number of samples required next
month - Correct Answers 5
Bacteria that are found only in surface water supplies - Correct Answers Cryptosporidium &
Giardia
How soon must NMED be no fied that a Bacterial MCL has been exceeded? ___ hours -
Correct Answers 24
Mexico) (Basic) Ques ons and answers LATEST
2025/2026 100% VERIFIED CORRECT
Maximum Contaminent Level - Correct Answers MCL
Public water system is a system that serves a popula on of ___ or more regularly - Correct
Answers 25
Maximum total chlorine residual ___ mg/l - Correct Answers 4
What type of contaminant is Iron - Correct Answers Secondary
Primary contaminant is some mes added to water supplies to prevent tooth decay - Correct
Answers Fluoride
The Failure of a public water system to comply with the NM Drinking Water Regula ons must
be reported to NMED within ___ hours - Correct Answers 48
MCL for Total Trihalomethanes ___ mg/l - Correct Answers 0.1
SDWA sampling results must be reported to - Correct Answers New Mexico Enviroment
Department (NMED)
Ground water systems must sample for inorganic chemicals every ___ years - Correct Answers
3
,The SDWA Compliance Cycle for Standardized Monitoring Rule consists of ___ Compliance
Periods - Correct Answers 3
___ or less than 5% bacteriological samples must be taken every month before a system is
allowed to have TWO posi ve samples without viola ng the drinking water standard? - Correct
Answers 40
Ac on level for Lead ___ mg/l - Correct Answers 0.015
If Bacteriological retakes are done this month what is the minimum number of samples that
must be turned in next month? - Correct Answers 5
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive and
s ll meet requirements - Correct Answers 0.1
Primary Inorganic Contaminant poses an immediate health risk - Correct Answers Nitrates
The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a
blue nt - Correct Answers Blue Baby Syndrome
Primary Contaminant that shields harmful bacteria from disinfec on processes - Correct
Answers Turbidity
Device used to measure NTU's - Correct Answers Nephelometer
Turbidity is Measured with - Correct Answers Turbidimeter or Nephelometer
Chemical sampling results be kept ___ years - Correct Answers 10
, Bacteriological sampling results be kept ___ years - Correct Answers 5
Microorganisms whose presence in water indicates probable presence of pathogens. - Correct
Answers Indicator organism
White powder used to neutralize chlorine - Correct Answers Sodium Thiosulphate
To insure the water being sampled is from the main and not the customers plumbling - Correct
Answers Flush line
Number is used to determine how many Bac-t samples must be taken - Correct Answers
People served
Minimum number of Bac-T samples required each month? - Correct Answers 1
Any me the MCL is exceeded and fecal coliform posi ve results come back from any of the
samples - Correct Answers Non-acute viola on
If retakes are required this month what is the minimum number of samples required next
month - Correct Answers 5
Bacteria that are found only in surface water supplies - Correct Answers Cryptosporidium &
Giardia
How soon must NMED be no fied that a Bacterial MCL has been exceeded? ___ hours -
Correct Answers 24
