download the new version Engine Evolution 2023

SWMM Reference Manual Volume II- Hydraulics (pdf) SWMM Reference Manual Volume 1- Hydrology (pdf) SWMM-CAT User’s Guide (Version 1.1) (pdf) (701.6 KB) SWMM Reference Manuals Errata (pdf) (232.9 KB) Source Code for the SWMM 5.2.4 Graphical User Interface (zip) Source Code for the SWMM 5.2.4 Computational Engine (zip) Self-Extracting Installation Program for SWMM 5.2.4 (64-bit) (exe) Self-Extracting Installation Program for SWMM 5.2.4 (32-bit) (exe) EPA’s GitHub Site for SWMM 5.2 open source project.SWMM 5 was produced in a joint development effort with CDM Smith 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.

Download the new version Engine Evolution 2023