Which CFR Part addresses drinking water?

• A. CFR 136.
• B. CFR 101.
• C. CFR 151.
• D. CFR 141.

Answer: (D)

Drinking water standards are established under the Safe Drinking Act and codified in the Code of Federal Regulations. CFR Part 141 directly addresses drinking water by setting National Primary Drinking Water Regulations for public water systems, including contaminant limits, monitoring and reporting requirements, and treatment techniques to ensure safe drinking water. CFR Part 136 provides approved testing methods for analyzing pollutants in water and wastewater, which supports enforcement but does not itself set drinking water standards. The remaining parts cover other regulatory areas of environmental protection and do not focus on drinking water standards. Therefore, CFR Part 141 is the one that addresses drinking water.