Which diseases should be of special concern to environmental engineers when designing, operating, or managing a water supply project?

Which diseases should be of special concern to environmental engineers when designing, operating, or managing a water supply project?

• A. II, IV, and V
• B. I, III, and VI
• C. III and IV
• D. V and VI

Answer: (D)

Focusing on diseases that spread through water is essential for designing, operating, and managing a water supply because those illnesses reflect how contamination, treatment, and distribution safeguards directly impact public health. The two diseases in the list that are of special concern are the ones most commonly transmitted via contaminated water and thus most sensitive to how well the water system is protected. Their presence signals the need for robust, multi-barrier protection: protecting the source, applying effective treatment (coagulation, filtration, and disinfection), maintaining a residual disinfectant through the distribution system, and ensuring integrity of the distribution network to prevent intrusion or backflow. These factors are central to preventing outbreaks and ensuring safe drinking water. Other diseases on the list may be more related to food, person-to-person spread, vectors, or settings where water plays a lesser or indirect role. While they are still important to overall public health, they do not drive water-supply design and operation to the same extent as the waterborne diseases that can be controlled most directly by the engineering barriers and monitoring used in drinking-water systems.

Focusing on diseases that spread through water is essential for designing, operating, and managing a water supply because those illnesses reflect how contamination, treatment, and distribution safeguards directly impact public health. The two diseases in the list that are of special concern are the ones most commonly transmitted via contaminated water and thus most sensitive to how well the water system is protected. Their presence signals the need for robust, multi-barrier protection: protecting the source, applying effective treatment (coagulation, filtration, and disinfection), maintaining a residual disinfectant through the distribution system, and ensuring integrity of the distribution network to prevent intrusion or backflow. These factors are central to preventing outbreaks and ensuring safe drinking water.

Other diseases on the list may be more related to food, person-to-person spread, vectors, or settings where water plays a lesser or indirect role. While they are still important to overall public health, they do not drive water-supply design and operation to the same extent as the waterborne diseases that can be controlled most directly by the engineering barriers and monitoring used in drinking-water systems.