A Reference Hub for EPA SWMM5 and ICM InfoWorks Modeling
EPA SWMM5 is the U.S. EPA's open-source Storm Water Management Model — the global standard for simulating rainfall-runoff, hydrology, hydraulics, and water quality in urban drainage, sewer, and stormwater systems. It powers commercial platforms including Autodesk InfoWorks ICM, InfoSWMM, PCSWMM, and XPSWMM.
Built over 50+ years of direct involvement with SWMM — from punch cards to cloud.
Who This Site Is For
🏛️ Municipal & Consulting Engineers
Calibrating real collection systems, running design storms, reviewing drainage plans.
🎓 Students & Researchers
Learning hydraulic modeling fundamentals and the numerics behind the engine.
🤖 ICM Power Users
Automating repetitive workflows with Ruby scripting inside InfoWorks ICM.
🔬 SWMM5 Developers
Validating engine behavior, testing edge cases, contributing to SWMM5+.
Why Modelers Use This Site
Searchable archive of real-world SWMM5 and ICM issues with documented fixes.
Ruby scripts for batch imports, network validation, and custom reporting.
"Inside SWMM5" posts explain what the numerical solver is actually doing.
Guidance for moving between EPA SWMM5, InfoSWMM, InfoSewer, PCSWMM, XPSWMM, and ICM.
Featured SWMM Utilities
Free, browser-based tools for EPA SWMM5 and ICM workflows.
SWMM5 Report File Reader
Generate 3,000+ informative charts and tables from any SWMM5 RPT file. Visualize continuity errors, flow summaries, node flooding, and conduit performance in seconds.
INP File Visualizer
Upload any SWMM5 INP file and instantly view network statistics and interactive diagrams.
ICM Ruby Script Library
150+ ready-to-use Ruby scripts for ICM InfoWorks automation, from batch imports to network cleanup.
InfoSewer → ICM Converter
Step-by-step guidance and tools for migrating InfoSewer models to ICM InfoWorks.
Built by someone who's been there since the beginning
Robert Dickinson has worked on the EPA Storm Water Management Model continuously since the 1970s — spanning every major version from SWMM3 through SWMM5 and the forthcoming SWMM5+.
Current Roles
- 🛠️ Water Technologist, Autodesk — supporting InfoWorks ICM, ICM SWMM, and Ruby automation
- 🎓 Chair, SWMM5+ Technical Advisory Committee at the Center for Infrastructure Modeling & Management (CIMM.org)
- 🏛️ EPA SWMM Technical Advisory Committee member
Prior Impact
- Helped embed the SWMM5 engine into InfoSWMM, InfoSewer, and InfoWorks ICM during 18+ years at Innovyze (now Autodesk)
- Contributed to the SWMM4 → SWMM5 transition and EPA QA/QC test suites
- Long-running contributor to OpenSWMM community discussions
YouTube
X / Twitter
LinkedIn
GitHub
"Nurturing SWMM communities for as long as people have been online." — a colleague
After 20+ years of blogging: 1,729+ articles · 150+ Ruby scripts · 99+ interactive utilities
All free. All searchable.