Regulations

Question 1

____ and/or _________ in a water supply can discolor laundry, cause a bad taste in the water, and cause taste problems in beverages such as coffee and tea.

Answer 1

Iron and/or Manganese in a water supply can discolor laundry, cause a bad taste in the water, and cause taste problems in beverages such as coffee and tea.

Question 2

Water systems that collect less than __ coliform samples each month can have 1 positive sample and remain in compliance.

Answer 2

Water systems that collect less than 40 coliform samples each month can have 1 positive sample and remain in compliance.

Question 3

The maximum contaminant level for bromate is _____ mg/L.

Answer 3

The maximum contaminant level for bromate is 0.010 mg/L.

Question 4

____ _______ is the best available technology for removing radium-226 and radium-228 from a water supply.

Answer 4

Lime softening is the best available technology for removing radium-226 and radium-228 from a water supply.

Question 5

Water systems must provide at least _____ removal or inactivation of Giardia lamblia cysts between a point where the raw water is not subject to recontamination by surface water runoff and a point downstream before or at the first customer.

Answer 5

Water systems must provide at least 3-log removal or inactivation of Giardia lamblia cysts between a point where the raw water is not subject to recontamination by surface water runoff and a point downstream before or at the first customer.

Question 6

Water systems must provide at least ____ removal or inactivation of viruses between a point where the raw water is not subject to recontamination by surface water runoff and a point downstream before or at the first customer.

Answer 6

Water systems must provide at least 4-log removal or inactivation of viruses between a point where the raw water is not subject to recontamination by surface water runoff and a point downstream before or at the first customer.

Question 7

Color gives the water an unappealing appearance and indicates that _______ _______ may be present.

Answer 7

Color gives the water an unappealing appearance and indicates that dissolved organics may be present.

Question 8

For water systems using conventional treatment or direct filtration, the turbidity level of representative samples of a system’s filtered water must be less than or equal to ___ NTU in at least 95% of the samples collected each month.

Answer 8

For water systems using conventional treatment or direct filtration, the turbidity level of representative samples of a system’s filtered water must be less than or equal to 0.3 NTU in at least 95% of the samples collected each month.

Question 9

A public water system that does not provide filtration must have a disinfection concentration in the distribution system, measured as total chlorine, combined chlorine, or chlorine dioxide, which cannot be undetectable in more than _% of the samples each

Answer 9

A public water system that does not provide filtration must have a disinfection concentration in the distribution system, measured as total chlorine, combined chlorine, or chlorine dioxide, which cannot be undetectable in more than 5% of the samples each

Question 10

Systems using diatomaceous earth filtration are required to have turbidity levels ___ ntu in __% of the measurements collected each month.

Answer 10

Systems using diatomaceous earth filtration are required to have turbidity levels ≤1.0 ntu in 95% of the measurements collected each month.

Question 11

Lab analysis of pH, turbidity, temperature, and residual disinfectant concentrations must be performed by a person approved by the ____.

Answer 11

Lab analysis of pH, turbidity, temperature, and residual disinfectant concentrations must be performed by a person approved by the state.

Question 12

Either the _____ or a _____ _______ certifies water treatment plant laboratories for the measurement of total coliforms, fecal coliforms, and heterotrophic plate counts.

Answer 12

Either the USEPA or a state agency certifies water treatment plant laboratories for the measurement of total coliforms, fecal coliforms, and heterotrophic plate counts.

Question 13

The time from sample collection to initiation of the fecal coliform analysis may not exceed _ hours.

Answer 13

The time from sample collection to initiation of the fecal coliform analysis may not exceed 8 hours.

Question 14

Samples to be analyzed for total coliforms by the total coliform Fermentation Technique, must be kept below __ degrees Celsius during transit.

Answer 14

Samples to be analyzed for total coliforms by the total coliform Fermentation Technique, must be kept below 10 degrees Celsius during transit.

Question 15

Utilities collecting samples more frequently than annually for inorganic contaminants determine MCL compliance by calculating a ______ ______ _______ at each compliance sample point.

Answer 15

Utilities collecting samples more frequently than annually for inorganic contaminants determine MCL compliance by calculating a running annual average at each compliance sample point.

Question 16

A Tier _ violation poses immediate risk to public health and requires a clear notification to the public within __ ______ of learning of the violation.

Answer 16

A Tier I violation poses immediate risk to public health and requires a clear notification to the public within 24 hours of learning of the violation.

Question 17

A Tier _ violation requires the water system to notify its customers as soon as possible, but within 30 days of learning of the violation and continue ________ notifications as long as the violation persists.

Answer 17

A Tier II violation requires the water system to notify its customers as soon as possible, but within 30 days of learning of the violation and continue quarterly notifications as long as the violation persists.

Question 18

A Tier _ violation requires the public water system to notify its customers within 12 months of learning of the violation. This may be accomplished by including the violation in the ________ _________ Report

Answer 18

A Tier III violation requires the public water system to notify its customers within 12 months of learning of the violation. This may be accomplished by including the violation in the Consumer Confidence Report

Question 19

Water systems avoiding filtration of source water must show that the turbidity of the source water immediately before the initial point of disinfection has not exceeded __ NTU in __% of the samples analyzed in the previous 6 months.

Answer 19

Water systems avoiding filtration of source water must show that the turbidity of the source water immediately before the initial point of disinfection has not exceeded 5.0 NTU in 90% of the samples analyzed in the previous 6 months.

Question 20

Solder or flux is considered lead free if it does not contain more than ___% lead.

Answer 20

Solder or flux is considered lead free if it does not contain more than 0.02% lead.

Question 21

Repeat samples for a positive coliform sample are required to be collected within __ hours.

Answer 21

Repeat samples for a positive coliform sample are required to be collected within 24 hours.

Question 22

A water system is considered public if it has at least __ service connections or serves __ or more persons __ or more days each year.

Answer 22

A water system is considered public if it has at least 15 service connections or serves 25 or more persons 60 or more days each year.

Question 23

Total _______ samples must be collected at sites which are representative of water quality throughout the distribution system according to a written ______ _____ _____ subject to state review and revision.

Answer 23

Total coliform samples must be collected at sites which are representative of water quality throughout the distribution system according to a written sample siting plan subject to state review and revision.

Question 24

The turbidity leaving a slow sand filter must be ____ ntu in 95% of the measurements collected each month.

Answer 24

The turbidity leaving a slow sand filter must be ≤1.0 ntu in 95% of the measurements collected each month.

Question 25

_ _______ of total coliform samples can be positive, for systems that collect 40 or more samples each month, and the system will remain in compliance.

Answer 25

5 percent of total coliform samples can be positive, for systems that collect 40 or more samples each month, and the system will remain in compliance.

Question 26

Systems that collect fewer than 40 total coliform samples each month are allowed _ positive sample without violating the total coliform rule.

Answer 26

Systems that collect fewer than 40 total coliform samples each month are allowed 1 positive sample without violating the total coliform rule.

Question 27

The maximum residual disinfection level goal for chlorine is _ ____.

Answer 27

The maximum residual disinfection level goal for chlorine is 4 mg/L.