EPANET
The public-domain standard for water distribution modelling — hydraulics and water quality in pressurised networks.
Autodesk's ArcGIS Pro-native distribution modelling — for utilities whose network data lives in Esri.
by Autodesk (Innovyze)
InfoWater Pro runs water-distribution modelling directly inside ArcGIS Pro: the model is a geodatabase, editing follows Esri workflows, and simulation (EPANET-derived hydraulics plus water quality, fire flow, criticality and calibration tools) happens without leaving the GIS. For utilities whose asset registry is Esri-native, that eliminates the import-export cycle every other architecture requires.
It competes directly with WaterGEMS; the practical decision usually reduces to your organisation's GIS/CAD standard and existing Autodesk-or-Bentley relationship.
Other water distribution & quality tools covering similar workflow stages.
The public-domain standard for water distribution modelling — hydraulics and water quality in pressurised networks.
Sandia/EPA's Python toolkit for water network resilience — EPANET simulation plus disaster scenarios and metrics.
Full MATLAB control of the EPANET engine — the standard bridge for control and optimisation research.
Multi-species water quality for EPANET — model chloramine decay, DBPs and reactive chemistry in networks.
Bentley's transient analysis package — the commercial standard for surge studies on pumping mains.
Bentley's flagship distribution suite — design, optimisation and criticality on EPANET-compatible hydraulics.