How often should routine testing for contaminants be performed in surface water systems?

Routine testing for contaminants in surface water systems is a critical component of water quality management, ensuring that the water supply is safe and meets regulatory standards. The correct choice emphasizes the necessity of conducting testing as specified by TCEQ regulations and facility permits. This is important because regulations are designed to reflect the unique conditions and potential contaminants of specific water sources, which can vary significantly.

Testing frequency specified in regulations and permits typically accounts for factors such as the size of the water system, the population served, historical water quality data, and the potential for contamination. By following these prescribed frequencies, operators can proactively address any emerging water quality issues and ensure compliance with health and safety standards.

In contrast, relying on complaints for testing lacks a proactive approach to water safety, while annual or five-year intervals may not adequately respond to variations in water quality that can happen more frequently. Therefore, adherence to TCEQ guidelines ensures a thorough and appropriate monitoring regimen tailored to each surface water system's specific needs.