Florida Drinking Water Operator "B" Practice Test

What is the maximum residual disinfectant level for chlorine?

1. 2.0 mg/l

2. 3.0 mg/l

3. 4.0 mg/l

4. 5.0 mg/l

The correct answer is: 4.0 mg/l

The maximum residual disinfectant level for chlorine is set at 4.0 mg/l. This standard is established by regulatory bodies to ensure safe drinking water while effectively controlling pathogens. Chlorine is commonly used as a disinfectant in water treatment due to its effectiveness in eliminating harmful microorganisms. At a maximum level of 4.0 mg/l, the concentration is sufficient to provide adequate disinfection without posing health risks to consumers. Higher concentrations may lead to unpleasant tastes and odors, and could potentially lead to health concerns if consumed regularly. This balance is crucial in maintaining public health safety while ensuring that water treatment facilities can effectively mitigate the risks posed by waterborne pathogens. Understanding this standard helps operators manage water treatment processes effectively, ensuring compliance with regulations while providing safe drinking water to the community.