Florida Drinking Water Operator "B" Practice Test

What effect does increasing chloramine residual have on water quality?

1. Decreases pH Levels

2. Increases Nitrification

3. Controls Microbial Growth

4. Enhances Taste

The correct answer is: Controls Microbial Growth

Increasing the chloramine residual in water distribution systems plays a significant role in controlling microbial growth. Chloramine is used as a disinfectant to ensure that harmful microorganisms, such as bacteria and viruses, are killed or inhibited as water travels through the distribution system. By maintaining an adequate level of chloramine, water utilities can effectively reduce biofilm formation and limit the regrowth of pathogens in the system. This control of microbial growth is essential for ensuring that the water remains safe for consumption throughout its distribution. The presence of a sufficient chloramine residual not only protects public health by preventing waterborne diseases but also is an important factor in maintaining overall water quality during storage and distribution. The proper management of chloramine levels helps ensure compliance with health standards and regulations set forth by environmental and health authorities.