Professional dual ozone water system for the supply of bromate-free water (patented). The system is made of stainless steel and equipped with customer-specific automatic control and safety devices. Each of the two system units can operate with a different type of water and provide different ozone capacities. The system is complete and ready to use. It includes an ozone generator, a carrier gas supply, a hydraulic dosing system, monitoring and safety devices, and an ozone destroyer. Suitable gassing valves and butterfly valves are optionally available for quick-dump processes.