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2025

epanet-js July 2025 Progress Report

GIS Model Builds, New Languages, and More!

It’s been one month since we launched epanet-js, and the response from the community has been incredible. Sam and I have been blown away by the feedback and are thrilled that over 3,000 of you from all around the world have already used the tool.

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GIS model builds are now in epanet-js!

Introducing epanet-js

Fast, local-first water modeling right in your browser

For decades, the U.S. EPA’s EPANET engine has powered almost every hydraulic modeling tool on the market. Yet most of us still wrestle with either the “classic” Windows interface — slow, dated, and held together by workarounds. Meanwhile, commercial platforms cost a fortune, lock up our data, and bury us in features we don’t need.

You deserve better.

The epanet-js interface in action