Top 10 Best Wastewater Treatment Design Software of 2026

BioWin, developed by Envirosim Associates, is a premier wastewater treatment modeling software that simulates biological processes like activated sludge, nutrient removal, and chemical precipitation in steady-state and dynamic modes. It enables detailed plant-wide modeling, optimization, and scenario analysis for designing and upgrading wastewater treatment plants (WWTPs). With a comprehensive library of validated models based on IWA standards, it supports regulatory compliance and operational improvements.

GPS-X from Hydromantis is a comprehensive wastewater treatment plant simulation software that enables detailed steady-state and dynamic modeling of entire treatment facilities using a graphical flowsheet interface. It supports advanced biological, chemical, and physical processes based on standard models like ASM and ADM, ideal for design, optimization, and operational troubleshooting. Widely used in industry and academia, it excels in plant-wide simulations including hydraulics, controllers, and cost estimation via integrated tools like CapdetWorks.

WEST, developed by DHI (dhigroup.com), is a powerful dynamic simulation software specialized for wastewater treatment plant (WWTP) design, optimization, and operation. It models complex biological, physical, and chemical processes using standards like Activated Sludge Models (ASM) and supports full-plant simulations from influent to effluent. Users can perform scenario analysis, calibrate models against real data, and develop advanced control strategies to enhance efficiency and compliance.

SUMO by Dynamita is a cloud-based dynamic simulator specialized for wastewater treatment plants, focusing on activated sludge processes and supporting industry-standard models like ASM1/2/3, ADM1, and others. It enables users to model plant layouts, simulate steady-state and dynamic conditions, optimize designs, and calibrate against real data for troubleshooting and scenario planning. The platform is designed for both design engineers and plant operators to improve efficiency and compliance in wastewater treatment.

SIMBA# from ifak.eu is a professional dynamic simulation software specialized for wastewater treatment plant (WWTP) design, optimization, and operation. It supports comprehensive plant-wide modeling, including biological processes (e.g., ASM models), hydraulics, sedimentation, and advanced control strategies. The tool allows for scenario testing, model calibration, and integration with external platforms like MATLAB/Simulink, making it ideal for detailed process simulations in wastewater engineering.

CapdetWorks, developed by Hydromantis, is a specialized software for the conceptual design, sizing, and economic evaluation of wastewater treatment plants. It enables users to construct process flow diagrams with a drag-and-drop interface and run steady-state simulations using activated sludge models like ASM1/2/3. The tool stands out for its integrated costing capabilities, providing detailed capital and O&M cost estimates to support preliminary feasibility studies and budgeting.

InfoWorks ICM, now part of Autodesk, is a powerful hydraulic modeling platform designed for simulating urban stormwater, wastewater collection networks, rivers, and flooding scenarios. It excels in 1D/2D integrated modeling to analyze pipe networks, predict overflows, and optimize system performance under dynamic conditions like rainfall events. While it interfaces with wastewater treatment processes through boundary conditions and simple plant models, it is primarily focused on conveyance and catchment hydraulics rather than detailed treatment plant design such as biological processes or unit sizing.

AQUASIM, developed by Eawag, is a free, open-source software for mathematical modeling and dynamic simulation of aquatic systems, with a primary focus on wastewater treatment processes like activated sludge systems and biofilm reactors. It enables users to build complex models using compartments, static and dynamic processes, and a library of predefined kinetic expressions, supporting both research and detailed process optimization. The tool excels in handling multi-phase, multi-component simulations but requires significant expertise for effective use.

STOAT, developed by HR Wallingford, is a specialized simulation software for modeling activated sludge wastewater treatment processes, including biological nutrient removal. It supports both steady-state and dynamic simulations to assist in plant design, optimization, operation, and troubleshooting. The tool integrates hydraulic and process models, making it suitable for detailed analysis of wastewater treatment systems.

WAND, developed by Hydromantis, is a steady-state modeling software designed for the preliminary analysis, design, and optimization of wastewater treatment plants (WWTPs). It enables users to build plant-wide models incorporating activated sludge processes, nutrient removal, and solids handling, while performing mass balances and kinetic simulations. The tool also includes a built-in costing module for CAPEX and OPEX estimates, making it suitable for early-stage design decisions.