PHREEQC

Active

USGS geochemical modelling — speciation, batch reactions, 1D reactive transport and inverse modelling.

by US Geological Survey

Pricing: Gov-Public
License: US Government (public domain)
Commercial use: Permitted
Ecosystem: Standalone, C++ library (PhreeqcRM)
Platform: Windows, macOS, Linux

About PHREEQC

PHREEQC is the USGS's geochemical workhorse: aqueous speciation and saturation indices, batch reaction and mixing calculations, surface complexation, ion exchange, kinetics, one-dimensional reactive transport and inverse modelling to explain observed water chemistry. Multiple thermodynamic databases ship with it.

Any time water chemistry matters — will this injected water precipitate calcite, what happens when leachate meets aquifer — PHREEQC is the default answer engine, embedded in countless couplings (PHT3D, HP1, PhreeqcRM) that bring its chemistry to transport models. Free, documented and universally accepted.

Where it fits in the workflow

TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting

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