Which regulation requires performance goals for filters, data collection, and reporting exceptions for any filter not performing in accordance with the turbidity values stated in the rule?

• A. Surface Water Treatment Rule
• B. Total Coliform Rule
• C. Interim Enhanced Surface Water Treatment Rule
• D. Filter Backwash Recycle Rule

Answer: (C)

The right regulation is the Interim Enhanced Surface Water Treatment Rule. This rule builds on the basic Surface Water Treatment Rule by adding explicit performance goals for filtration, along with requirements to collect data and report any exceptions when a filter isn’t meeting the turbidity values specified in the rule. That means plant operators must monitor filter performance, track turbidity data, and promptly document and report any deviations so regulators can oversee corrective actions and maintain protection against microbial contamination.

The Surface Water Treatment Rule sets turbidity limits but doesn’t mandate this detailed performance-goal framework and exception reporting. The Total Coliform Rule focuses on bacterial contamination, not turbidity performance. The Filter Backwash Recycling Rule concerns how backwash water is handled, not turbidity performance or reporting of filter exceptions.