AquaChem
Water Quality Data Analysis and Reporting Software
AquaChem’s analysis tools cover a range of functions and calculations including unit transformations, charge balances, and statistics. These powerful analytical capabilities are complemented by an extensive selection of commonly used geochemical plots to represent the chemical characteristics of water quality data.

What's New in AquaChem 11.0
See what is included in the new version of AquaChem 11.0 (Download feature sheet)
View what was included in AquaChem 10.0 (Download feature sheet)
For a complete version history, see the AquaChem readme file
Plot Collections
Plot collections have been enhanced to include:
- Multi-parameter plots: Box and Whisker, Scatter, and Time Series plots support adding multiple parameters
- Secondary y-axes: Scatter and Time Series Plots support adding a secondary axis
- Piper Diagram: Piper Diagram includes an additional setting to make symbols in the diamond portion of the plot proportional to a selected parameter such as TDS or conductance.
- Non-Detect Symbols: The symbols for data points on plots with non-detect QA flags can be automatically overridden to indicate the non-detect status.
- Symbol Editor: create ramped symbols based on numeric fields using unique values or categorized intervals based on a specified number of linear, log, or quantile breaks.: create ramped symbols based on numeric fields using unique values or categorized intervals based on a specified number of linear, log, or quantile breaks.
- Interactive Multi-Select: You can select multiple data points on plots and they will be selected in the Sample List and active Maps.
- Settings: axis settings for plots have been reorganized into logical and collapsible groups.
Data Management
- Custom Calculated fields and parameters: designate a sample field or a parameter as a calculation-enabled in the Template Manager and insert values for selected samples based on a mathematical expression that can include parameters (with unit conversion) and common functions.
- Parameter Handling: automatically add a list of parameters based on its name or CAS number (before or during import) from the Chemical List and automatically delete parameters with no measurements in your project – this greatly improves automating parameter management.
- Sample Set Creation: Add a sample set condition based on the exceedance of any parameter in a specified parameter group.
Other Enhancements
- Import: Improved performance when importing larger AquaChem 2014 projects
- String Data Type: string data fields can now be specified with any length
- International date handling: Import Data supports international date formats
For full version history, see the AquaChem readme file at: https://www.waterloohydrogeologic.com/aquachem-readme/
Why Choose AquaChem?

AquaChem’s analysis tools cover a range of functions and calculations including unit transformations, charge balances, and statistics. These powerful analytical capabilities are complemented by an extensive selection of commonly used geochemical plots to represent the chemical characteristics of water quality data.
- Simple and easy analysis of water quality data
- Effortless and flexible data importing and exporting
- Automatic geochemical calculations of water type, sum of anions, sum of cations, ion balance, TDS, hardness and more
- Water quality exceedance reports for multiple water quality standards
- Automatic ready-made reports

Effortless Data Management & QA/QC
- Easily import data from various file types (.txt, .csv, .xls, .xlsx, .mdb, and .accdb) and file formats (samples as rows, samples as columns, one analyzed value for each row)
- Export stations, analysis data and geochemical plots to multiple formats, including text files, spreadsheets, images, and print-ready Office documents.
- Create simple to complex data queries and easily extract vital information about your water quality data.

Interactive GeoChemical and Statistical Plots
AquaChem allows you to create multiple plots for the same dataset and view these plots simultaneously side-by-side. All plots are interactive – click on a data point and its corresponding sample is highlighted in the sample list. This is useful for identifying outliers.
- Geochemical plots: Piper, Stiff, Durov, Schoeller, Wilcox, Giggenbach, Meteoric Water Line, Ludwig-Langelier, Ternary
- Statistical Plots: Box and Whisker, Histogram, Probability, Quantile, Detection Summary
- General Plots: Scatter, Pie, Stacked Bars, Radial, Time Series