The graphing tool developed for WRDB goes far beyond the typical graphing applications in that it is tightly integrated into WRDB and provides many advanced features for performing data analyses. In addition to displaying selected data from WRDB tables, may other types of data files can be graphed including BMD, Paradox, dBase, Excel, text, DSS, WDM, HSPF, GSSHA, LSPC, database files such as Access, Firebird, SQLite, and SQL Server CE, and external database connections to Oracle, SQLServer, Firebird, and MySQL.

WRDB Graph can do data aggregation, smoothing, calculated series, criteria limits, and calculations between series (adding and subtracting). Calibration datasets can be created to quickly compare observed and computed data using one of several graphical formats: time series, longitudinal, depth, and width profiles, scatter plots, histograms, probability, and load-duration. In many cases time-varying data can be animated and movies recorded. Regression lines and probability distributions can be fitted to selected data series.

The graphing tool is so robust that it has been adopted as the standard postprocessing tool used by WASP, EPDRiv1, and EFDC and can be used for model visualization for many other types of water resources and water quality models.