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Open Water Analytics Stormwater Management Model repository
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ORD Stormwater Management Model (aka "SWMM")

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This is the open source SWMM source code repository maintained by the Open Water Analytics group.

SWMM is a dynamic hydrology-hydraulic water quality simulation model. It is used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. SWMM source code is written in the C Programming Language and released in the Public Domain.


Everyone is welcome to contribute to this project.

See for insructions on setting your development environment.

Regression Testing

To run the test suite for please refer to the

Code of conduct

The SWMM Project follows the Contributor Covenant Code of Conduct

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