Waterworks operator's holding grade C certificates are required to renew their certificates every three years and to:

The correct answer is that waterworks operators holding grade C certificates are required to complete continuing education units for the renewal of their certificates every three years. Continuing education is crucial in ensuring that operators stay up to date with the latest practices, technologies, and regulatory requirements in water management and treatment.

This requirement emphasizes the importance of ongoing training and education to maintain the competency of waterworks operators, which is vital for public health and safety. Operators must engage in continuous learning to develop their skills and knowledge, thereby ensuring they can efficiently manage and operate water systems.

While notifying the Texas Commission on Environmental Quality (TCEQ) about any address changes is important for maintaining accurate records, it does not address the educational competencies needed for renewal. Other options such as passing an additional exam, submitting a work experience report, or simply updating personal information do not fulfill the requirement for continuous professional development that is mandated for certificate renewal.