Which organization is NOT listed as a source of approved laboratory test methods for compliance monitoring?

• A. World Health Organization
• B. ASTM International
• C. Standard Methods
• D. U.S. Geological Survey

Answer: (A)

In compliance monitoring, labs rely on standardized, officially accepted methods published by organizations that produce regulator-ready protocols. Standard Methods for the Examination of Water and Wastewater is the go-to reference that details validated procedures used across many labs for environmental testing. ASTM International publishes a wide array of standard test methods that labs commonly adopt for quality and consistency. The U.S. Geological Survey provides its own validated methods for analyzing water quality, which are routinely used in monitoring programs. The World Health Organization, while offering important guidelines on drinking-water quality and health implications, does not typically serve as the source of official, approved lab test methods for regulatory compliance monitoring. Its role is guidance and policy, not the formal method standardization used in compliance testing.