OMNIA WATER TREATMENT THE PASSION FOR SOLVING WATER TREATMENT PROBLEMS - WASTEWATER TREATMENT The office of Omnia Water Treatment is located in Schagen, the Netherlands and is the main contract partner for clients all around the world. We have the following disciplines in-house: Process engineering; Mechanical and piping engineering; E&I engineering; Project management; Site supervisors; After sales service and spare parts department. Our engineering department use the latest software for 3D design. Omnia Water Treatment has its own workshop, where we fabricate and test our products before delivery.