Which of the following is the third step in reporting a water contamination event?

• A. Notify Chain of Command
• B. Isolate the Issue
• C. Implement Protective Measures
• D. Collect Samples

Answer: (C)

In this sequence, protecting people from exposure takes priority as the situation unfolds. Once a water contamination event is detected and command is alerted, the next immediate action is to isolate the issue to prevent further spread or use of contaminated water. After that isolation comes implementing protective measures to reduce or eliminate exposure for anyone relying on the water supply—such as issuing boil-water advisories, providing safe alternatives, restricting use of the affected system, and distributing safe drinking water. Collecting samples remains essential for identifying the contaminant and guiding remediation, but it should follow these protective actions so safety isn’t delayed by data gathering. This makes protective measures the appropriate third step, because it directly shields personnel while the investigation and containment continue.