Which rule requires maintaining recordkeeping and reporting?

• A. Primary Drinking Water Regulations
• B. Secondary Drinking Water Regulations
• C. 40 CFR Part 3
• D. Agency Primacy Rules

Answer: (D)

Agency Primacy Rules establish who administers and oversees a federal program at the state level, and they require ongoing documentation and reporting to the federal agency. When a state has primacy, it must maintain records of monitoring, inspections, and enforcement actions, and it must regularly report to the federal agency to prove the program is being implemented correctly. This is why the obligation to keep records and to report is tied to primacy itself—the administrative framework that ensures accountability and consistency across jurisdictions.

The other options describe the standards or parts of the regulatory framework but don’t specifically mandate the agency’s recordkeeping and reporting duties. Primary Drinking Water Regulations set the contaminant limits and the monitoring that water systems must perform; they define what must be achieved, not who must report to the federal level. Secondary Drinking Water Regulations address aesthetics and taste/appearance issues, not compliance reporting. 40 CFR Part 3 covers other procedural aspects, not the core recordkeeping and reporting requirement tied to program implementation at the state level.

So, the rule that requires maintaining records and reporting is the Agency Primacy Rules.