HydroSewer - Drainage Network

HydroSewer is a professional stormwater and sewer network analysis tool powered by the EPA SWMM 5.2 engine. Design, analyze, and simulate drainage networks directly from your iPhone or iPad.

KEY FEATURES

- Import and export EPA SWMM input files (.inp) for full compatibility with existing workflows

- Run hydraulic simulations using the real EPA SWMM 5.2 engine - no cloud required, everything runs on-device

- Visualize your drainage network with an interactive map: zoom, pan, and select elements

- Step through simulation results over time to see how your network performs under storm conditions

- Inspect and edit node, link, and subcatchment properties

- View real-time computed values: water depth at nodes, flow rate in conduits, velocity, and more

FIELD NOTES

- Tap any manhole, outfall, or pipe and attach a note, with photos, tied to that exact element

- Flag as-built discrepancies, log observations, or leave a "check this" for the office

- Mark notes open or resolved; every element with an open note is highlighted on the map

- See all your open notes in one project-wide list and jump straight to each element

- Notes and photos are saved in your project and never touch the .inp file

FREE, WITH NO LIMITS

Model networks of any size and add unlimited field notes and photos, free, forever. HydroSewer Pro is an optional one-time purchase that adds a shareable PDF report of your open field notes, for handing off to your team or client. Everything else stays free.

BUILT FOR ENGINEERS

HydroSewer brings the power of EPA SWMM to your mobile device. Whether you are in the office reviewing a design or in the field verifying a network, you can load any standard .inp file and run a full dynamic simulation instantly.

Supported elements include junctions, outfalls, conduits, pumps, weirs, orifices, subcatchments, and rain gages.

ABOUT EPA SWMM

EPA SWMM (Storm Water Management Model) is the industry-standard software developed by the U.S. Environmental Protection Agency for planning, analysis, and design of stormwater runoff, combined and sanitary sewers, and other drainage systems.