SWMM
US Environmental Protection Agency
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Download from the vendor
www.epa.gov
An urban drainage model computing rainfall, runoff, flow through inlets and channels, and the behaviour of detention and infiltration facilities, for a single event or a long continuous series. It also handles runoff quality and sustainable drainage measures, and like EPANET it is distributed free with source code and serves as the engine inside many commercial tools.
Ratings & Reviews
| Licence type | Completely Free |
|---|---|
| Licence terms | US government software, distributed free and in the public domain, with no licence and no usage restriction. Built around US data and standards — adapt to local codes before use in design. |
| Platforms | Windows |
| Engineering field | Civil Engineering, Environmental & Water |
| Tool type | Hydrology & Drainage |
| Vendor site | www.epa.gov |
This link goes to the vendor site. EngiFree hosts no installers and distributes no cracked versions.
Last verified: 2026-09-02
