Water Operator Certification Study
Material ( New Mexico) (Basic) with
questions and well verified answers actual
exam!!! 2026
Maximum Contaminent Level - ANSWER -MCL
Public water system is a system that serves a population of ___ or more regularly -
ANSWER -25
Maximum total chlorine residual ___ mg/l - ANSWER -4
What type of contaminant is Iron - ANSWER -Secondary
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 ___ hours - ANSWER -48
MCL for Total Trihalomethanes ___ mg/l - ANSWER -0.1
, SDWA sampling results must be reported to - ANSWER -New Mexico Enviroment
Department (NMED)
Ground water systems must sample for inorganic chemicals every ___ years - ANSWER -
3
The SDWA Compliance Cycle for Standardized Monitoring Rule consists of ___ Compliance
Periods - ANSWER -3
___ or less than 5% bacteriological samples must be taken every month before a system is
allowed to have TWO positive samples without violating the drinking water standard? -
ANSWER -40
Action level for Lead ___ mg/l - ANSWER -0.015
If Bacteriological retakes are done this month what is the minimum number of samples that
must be turned in next month? - ANSWER -5
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive
and still meet requirements - ANSWER -0.1
Primary Inorganic Contaminant poses an immediate health risk - ANSWER -Nitrates
The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a
blue tint - ANSWER -Blue Baby Syndrome
Primary Contaminant that shields harmful bacteria from disinfection processes -
ANSWER -Turbidity
Device used to measure NTU's - ANSWER -Nephelometer
Turbidity is Measured with - ANSWER -Turbidimeter or Nephelometer
Material ( New Mexico) (Basic) with
questions and well verified answers actual
exam!!! 2026
Maximum Contaminent Level - ANSWER -MCL
Public water system is a system that serves a population of ___ or more regularly -
ANSWER -25
Maximum total chlorine residual ___ mg/l - ANSWER -4
What type of contaminant is Iron - ANSWER -Secondary
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 ___ hours - ANSWER -48
MCL for Total Trihalomethanes ___ mg/l - ANSWER -0.1
, SDWA sampling results must be reported to - ANSWER -New Mexico Enviroment
Department (NMED)
Ground water systems must sample for inorganic chemicals every ___ years - ANSWER -
3
The SDWA Compliance Cycle for Standardized Monitoring Rule consists of ___ Compliance
Periods - ANSWER -3
___ or less than 5% bacteriological samples must be taken every month before a system is
allowed to have TWO positive samples without violating the drinking water standard? -
ANSWER -40
Action level for Lead ___ mg/l - ANSWER -0.015
If Bacteriological retakes are done this month what is the minimum number of samples that
must be turned in next month? - ANSWER -5
if a 3-log removal is required for Giardia Lamblia what percentage of organisms can survive
and still meet requirements - ANSWER -0.1
Primary Inorganic Contaminant poses an immediate health risk - ANSWER -Nitrates
The Presence of Nitrates in the bloodstream that reduces oxygen uptake that gives the skin a
blue tint - ANSWER -Blue Baby Syndrome
Primary Contaminant that shields harmful bacteria from disinfection processes -
ANSWER -Turbidity
Device used to measure NTU's - ANSWER -Nephelometer
Turbidity is Measured with - ANSWER -Turbidimeter or Nephelometer
