Water quality monitoring contributes to disease prevention by?

• A. Replacing the need for sanitation
• B. Detecting contaminants and ensuring safe drinking water to prevent waterborne disease
• C. Monitoring only taste and odor
• D. Increasing water hardness for immune protection

Answer: (B)

Water quality monitoring prevents disease by actively checking drinking water for contaminants and ensuring it meets safety standards before people drink it. By regularly sampling and testing for microbial indicators (like coliform bacteria and pathogens), chemical contaminants, and treatment parameters (such as disinfectant residuals and water clarity), it provides early warning of contamination and guides changes in treatment to keep water safe. When problems are detected, actions like adjusting disinfection, removing or diluting contaminants, and issuing public health advisories can be taken to prevent waterborne illness from reaching the community. This approach directly targets safety of the water supply, unlike choices that rely on taste or odor or on unrelated factors like increasing hardness.