How often should the secondary water supply tank be cleaned according to the Property Law?

According to the requirements of the new regulations, the property management company shall invite the management unit of secondary water supply facilities to conduct a test on the water quality of secondary water supply every quarter, clean and disinfect the secondary water supply tank facilities every six months, and provide qualified water sample test reports. Users (owners) have the right to know the relevant information of cleaning and disinfection, and can also participate in full-time supervision of cleaning and disinfection.