Surface water supplies should be sampled for chemical analysis every year and groundwater supplies should be sampled three times a year.

Surface water supplies should be sampled for chemical analysis every year and groundwater supplies should be sampled three times a year.

• A. True
• B. False
• C. Not specified
• D. Not applicable

Answer: (B)

Sampling frequency for chemical analysis is driven by regulatory requirements and the variability of the water source, not by a fixed rule. Surface water can change with seasons, storms, and runoff, so monitoring is typically required more often than once a year—often quarterly or per the regulatory schedule—to reliably detect changes in quality. Groundwater tends to be more stable, but still must be monitored according to the system’s approved plan, usually on a quarterly basis for routine chemicals, with more frequent sampling if conditions indicate a concern. So, stating that surface water should be sampled every year and groundwater three times a year doesn’t align with common practice and regulatory guidance. Always follow the specific monitoring schedule set by the regulatory authority and the water system’s plan.

Sampling frequency for chemical analysis is driven by regulatory requirements and the variability of the water source, not by a fixed rule. Surface water can change with seasons, storms, and runoff, so monitoring is typically required more often than once a year—often quarterly or per the regulatory schedule—to reliably detect changes in quality. Groundwater tends to be more stable, but still must be monitored according to the system’s approved plan, usually on a quarterly basis for routine chemicals, with more frequent sampling if conditions indicate a concern. So, stating that surface water should be sampled every year and groundwater three times a year doesn’t align with common practice and regulatory guidance. Always follow the specific monitoring schedule set by the regulatory authority and the water system’s plan.