Opening hours of Sewage treatment plant in Cocoroc, Victoria Opening hours of Sewage treatment plant in Cocoroc, Victoria Home / Victoria / Cocoroc / Sewage treatment plant Sewage treatment plant Western Treatment Plant - William Thwaites Drive Entrance William Thwaites Dr, Cocoroc VIC 3030, Cocoroc, Victoria 3030 Categories of local businesses in Cocoroc Business Services Industry & Agriculture Sewage treatment plant Waste management service Water treatment plant