What should be done immediately if there is evidence that the distribution system has been tampered with by vandals or terrorists?

When there is evidence of tampering with the distribution system, taking the facility out of service is the most appropriate course of action. This decision is crucial for several reasons.

First and foremost, the integrity and safety of the water supply must be prioritized. Tampering may compromise water quality or availability, posing risks to public health. By removing the facility from service, operators can prevent potentially contaminated water from entering the distribution system, safeguarding consumers.

Additionally, taking the facility offline allows for a thorough assessment and investigation of the tampering incident. This is vital not only for repairing any damage but also for determining how the breach occurred and preventing future incidents. It ensures that any necessary security measures can be put in place and that affected areas can be adequately monitored.

While contacting local authorities for advice is an important step in the overall response, it should occur after securing the safety of the system. Immediate repairs and resuming service without proper evaluation can lead to greater issues, including health risks and legal liabilities. Ignoring the issue, regardless of perceived severity, is never an acceptable approach in situations that could endanger public safety.