Which class license must supervise the operation of chlorine dioxide in public water systems?

The operation of chlorine dioxide in public water systems requires a Class C license because this level of licensure encompasses the knowledge and skills needed to handle various treatment processes, including chemical applications like chlorine dioxide. Class C license holders are trained to manage the complexities involved in water treatment operations, which include chemical dosing, monitoring, and ensuring compliance with safety and regulatory standards.

Class C is specifically designed for mid-level water treatment operators and addresses the operational oversight of water treatment systems, including disinfection practices. This knowledge is crucial when dealing with powerful oxidants like chlorine dioxide, which are used for disinfection and must be monitored closely to ensure both water quality and safety for public health.

While the other classes, such as Class B and Class D, have their own scopes of work and competencies, they do not specifically include the same level of responsibility for the direct supervision of chlorine dioxide application in public water systems. Class D typically focuses on basic water distribution operations, which may not involve advanced treatment processes, and Class B may cover more advanced aspects of water treatment, but not specifically the use of chlorine dioxide. Therefore, for the supervision of chlorine dioxide, a Class C license is essential.