Water Operator Certification Study Material (
New Mexico) (Basic) 2024-2025 QUESTIONS
AND ANSWERS GRADED A+
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
Chemical sampling results be kept ___ years ANSWER-10
Bacteriological sampling results be kept ___ years ANSWER-5
Microorganisms whose presence in water indicates probable presence of pathogens. ANSWER-Indicator
organism
New Mexico) (Basic) 2024-2025 QUESTIONS
AND ANSWERS GRADED A+
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
Chemical sampling results be kept ___ years ANSWER-10
Bacteriological sampling results be kept ___ years ANSWER-5
Microorganisms whose presence in water indicates probable presence of pathogens. ANSWER-Indicator
organism
