Florida Drinking Water Operator "B" Practice Test

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Study for the Florida Drinking Water Operator "B" Test. Use multiple choice questions, flashcards, and explanations to prepare. Ace your certification!

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What is the recommended range of residual chlorine levels in drinking water?

0.2 to 0.5 mg/L
1.0 to 1.5 mg/L
0.5 to 1.0 mg/L
1.5 to 2.0 mg/L

The correct answer is: 0.5 to 1.0 mg/L

The recommended range for residual chlorine levels in drinking water is typically between 0.5 to 1.0 mg/L. This concentration is considered effective for both disinfection purposes and maintaining a residual effect throughout the distribution system. Chlorine is widely used in water treatment facilities because it is an efficient sanitizer that helps eliminate harmful pathogens and keep the water safe for consumption. Maintaining chlorine levels within this range ensures that the water remains pathogen-free during transport, without posing significant health risks to consumers. Levels that are too low may not effectively control microbial contamination, while levels too high can lead to unpleasant tastes or odors and potentially harmful effects if consumed over time. Thus, the range of 0.5 to 1.0 mg/L strikes a balance between safety, efficiency, and palatability.