Operation and Maintenance (O&M) of a Chlorine Dioxide (ClO2) system is critical to ensure that the system is functioning properly and producing safe and effective levels of ClO2.

1. Monitoring: The ClO2 system should be regularly monitored to ensure that it is producing the correct amount of ClO2 and that the system is functioning properly. This includes monitoring the pH level of the water, the temperature of the water, the chlorine dioxide residual, and the flow rate of the water.

2. Maintenance: Regular maintenance should be performed on the ClO2 system to ensure that it is functioning properly. This includes cleaning and servicing the equipment, such as the chlorine dioxide generator, the dosing pumps, and the storage tanks.

3. Safety: Safety is critical when handling and working with ClO2. The system should be designed to minimize the potential for release of chlorine dioxide gas, and proper personal protective equipment should be used when working with ClO2.

4. Record Keeping: Keeping accurate records is crucial to the proper operation and maintenance of the ClO2 system. This includes monitoring data, maintenance records, safety procedures and any incidents that occur.

5. Compliance: The ClO2 system should be designed and operated in compliance with all local, state, and federal regulations. This includes obtaining necessary permits and meeting any reporting requirements.

In summary, O&M of a ClO2 system involves monitoring and adjusting the system, performing regular maintenance, implementing safety measures, keeping records, and ensuring compliance with regulations.