WWHM-SWMM Stormwater Modeling Software Made Easy

Get the Power of EPA SWMM + HSPF Model in One Simple Tool

The easiest-to-use Continuous Simulation Modeling system is now the most accurate stormwater management software on the market.

WWHM-SWMM combines the best hydrology model (HSPF) with the best hydraulics model (SWMM).

This powerful combination makes WWHM-SWMM the most advanced AND user-friendly hydrologic and hydraulic modeling tool available today.

Interconnecting HSPF and EPA SWMM5 elements is SIMPLE and INTUITIVE with the new Graphical User Interface.

And with the latest WWHM4 version, WWHM-SWMM now integrates with HEC-RAS.

Watch WWHM-SWMM in Action

See how the industry-first model is revolutionizing stormwater

Get the WWHM-SWMM Program that Fits Your Needs

  • Multi-User
  • $175
    per month
  • Ideal for large offices with multiple users.
  • Unlimited tech support
  • Licenses can be applied at multiple locations
  • Powerful graphical interface with fully integrated WWHM & SWMM capabilities
  • Full analytical tools including flow frequency, duration, and event analysis.
  • Complete compatibility with HSPF, SWMM, and HEC-RAS.
  • Backwards compatible with
  • WWHM4
  • WWHM2012
  • SDHM 3.1
  • BAHM
  • SOHM
  • SMRHM
  • TRUST
  • SHM
  • Single User
  • $75
    per month
  • Ideal for an office with one or two users.
  • Unlimited tech support
  • -
  • Powerful graphical interface with fully integrated WWHM & SWMM capabilities
  • Full analytical tools including flow frequency, duration, and event analysis.
  • Complete compatibility with HSPF, SWMM, and HEC-RAS.
  • Backwards compatible with
  • WWHM4
  • WWHM2012
  • SDHM 3.1
  • BAHM
  • SOHM
  • SMRHM
  • TRUST
  • SHM

Try it for 7 days with no commitment. Contact us for a free trial.

A Revolution in Stormwater Modeling

Finally WWHM(HSPF) and SWMM in one model.

  • Analyze anything from major river systems down to small site developments.
  • Quickly arrive at the most efficient mitigation approach with LID sizing tools.
  • Perform complex hydraulics that may impact your system.
  • Quickly and easily view output, flow frequency, and duration results.

Latest Features & Capabilities in WWHM4

Commercial Products Integrated in WWHM-SWMM

WWHM-SWMM Tech Specs

Use WWHM-SWMM with HEC-RAS Easily

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