When assessing the status of the drinking water supply, which of the following should you check?

• A. Water pressure
• B. Status of disinfecting chemicals
• C. Access to lab for testing
• D. All of the above

Answer: (D)

When evaluating the status of the drinking water supply, you need a full picture of how well the system is performing and whether it’s still protecting public health. Water pressure shows whether the distribution system can reliably deliver water to consumers and can reveal main breaks, leaks, or pump failures that affect service and potential contamination risk. The status of disinfecting chemicals indicates whether the residual disinfectant is present at safe levels throughout the system to keep pathogens in check as water moves from treatment to taps. Access to a lab for testing is essential to verify actual water quality through proper analyses and to detect any microbial or chemical contaminants that might not be evident from other indicators. Taken together, these factors determine both the safety and reliability of the water supply, so all of them should be checked.