NetSTORM
Free
CDM Smith's free rainfall statistics and STORM-method screening model — IDF analysis, disaggregation, CSO planning.
EPA SSOAP Toolbox
DormantEPA's toolbox for sanitary sewer overflow planning — RDII analysis with the SWMM engine underneath.
by US EPA
- Pricing
- Gov-Public
- License
- US Government (public domain)
- Commercial use
- Permitted
- Ecosystem
- SWMM, Standalone
- Platform
- Windows
About EPA SSOAP Toolbox
The Sanitary Sewer Overflow Analysis and Planning (SSOAP) Toolbox is the EPA's tool for the defining problem of sanitary systems: rainfall-derived inflow and infiltration. It decomposes flow-monitoring records into base flow and RDII, fits the RTK unit-hydrograph parameters that describe a basin's wet-weather response, and simulates the collection system with an embedded SWMM5 engine to size relief and plan SSO controls.
The RTK methodology it operationalises is the standard language of I/I studies in North America — commercial packages fit the same parameters. Development has been quiet for years, so expect dated ergonomics, but the analysis it performs remains exactly how the work is done.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Appears in collections
- The SWMM Ecosystem
The public-domain urban drainage engine and everything that grew around it.
Alternatives to EPA SSOAP Toolbox
Ranked by the topics, categories and workflow stages they share with EPA SSOAP Toolbox.
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Storm and foul water drainage design and 1D hydraulic modelling software for UK and Irish civil engineers.
EPA SWMM
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PCSWMM
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CHI's commercial GIS front-end for SWMM — the most direct productivity upgrade for serious SWMM users.
PySWMM
Open SourceVerified
Python interface to the SWMM engine — step through simulations, read state, and control gates in real time.
LocalSWMM
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Browser-based urban stormwater and drainage modeling powered by OpenSWMM 6 compiled to WebAssembly.