Following is a list of freeware that provides tools for investigating, sampling, and treating wastewater. Before you access any software or apps, please read our disclaimer and permissions page if you haven't already done so.

Bioassay Quick Reference Table
By California Department of Toxic Substances Control. This guide is the prototype of a project aimed at creating an index of all the standard bioassays currently being used in the scientific community. Initially includes ASTM standards.

MEASERR (for Data General AViiON)
By US Geological Survey (USGS). A program for determining error in individual discharge measurements. Source code is available.

MEASERR (for DOS)
By US Geological Survey (USGS). A program for determining error in individual discharge measurements. Source code is available.

MEASERR (for Sun SPARCstation Solaris)
By US Geological Survey (USGS). A program for determining error in individual discharge measurements. Source code is available.

MINTEQA2 (for DOS)
By US Environmental Protection Agency, Center for Exposure Assessment Modeling (CEAM). MINTEQA2 is a equilibrium speciation model that can be used to calculate the equilibrium composition of dilute aqueous solutions in the laboratory or in natural aqueous systems. The model is useful for calculating the equilibrium mass distribution among dissolved species, adsorbed species, and multiple solid phases under a variety of conditions including a gas phase with constant partial pressures. A data base is included for solving a broad range of problems without need for additional user-supplied equilibrium constants.

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This page last updated on 9/29/16