Abstract: System and methods for fluid treatment design and analysis are provided. Data for treatment parameters associated with a multistage fluid treatment design are obtained, based on at least one design criterion selected from a plurality of design criteria affecting the multistage fluid treatment design. A relative index value is determined for each of the treatment parameters with respect to the selected design criterion at each stage of the multistage fluid treatment design. Values are assigned to one or more visualization parameters for indicating a relative impact of each of the treatment parameters with respect to the selected design criterion at each stage, based on the relative index value corresponding to each treatment parameter. A three-dimensional (3D) graphical representation of the multistage fluid treatment design is generated and provided for display via a graphical user interface (GUI) of a client application executable at a computing device of a user.