Non-compliance reporting is required when which of the following occurs?

• A. When monitoring results exceed the permitted range.
• B. When primary drinking water regulations are violated.
• C. When CCR is published.
• D. When the water system is connected to another system.

Answer: (B)

Non-compliance reporting happens whenever a public water system violates a primary drinking water regulation. Primary regulations establish enforceable limits and requirements for monitoring and reporting, treatment techniques, and performance standards. When a violation occurs—such as an exceedance of an MCL, a failure to monitor or report as required, or a failure to meet a treatment technique—the system must notify the state primacy agency (and often the EPA) to protect public health. Publishing a Consumer Confidence Report is a separate obligation to inform customers, not a non-compliance report to the regulator. Likewise, simply connecting to another system isn’t itself a PDWR violation.