Source Code for the SWMM 5.1.015 Computational Engine (ZIP) (zip) SWMM 5.1.015 Updates and Bug Fixes (TXT) (txt) Utility for converting SWMM 4 data files to SWMM 5 files (EXE) Version 1.2 (exe) Self-Extracting Installation Program for SWMM 5.1.014 (exe) Self-Extracting Installation Program for SWMM 5.1.015 (exe) SWMM 5 was produced in a joint development effort with CDM, Inc., a global consulting, engineering, construction, and operations firm. It is open source public software and is free for use worldwide. SWMM was developed to help support local, state, and national stormwater management objectives to reduce runoff through infiltration and retention, and help to reduce discharges that cause impairment of waterbodies. It can be used to evaluate gray infrastructure stormwater control strategies, such as pipes and storm drains, and is a useful tool for creating cost-effective green/gray hybrid stormwater control solutions.

EPA and its employees do not endorse commercial products, services, or enterprises.ĮPA's Storm Water Management Model (SWMM) is used throughout the world for planning, analysis, and design related to stormwater runoff, combined and sanitary sewers, and other drainage systems. Disclaimer: Any mention of trade names, manufacturers, or products does not imply an endorsement by EPA.

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