Hydrological Simulation Program-Fortran (HSPF) is one of the most widely used software packages for modeling hydrology and water quality in watersheds; it has been used around the world for almost four decades. The United States Environmental Protection Agency (USEPA) supports the continued development of HSPF; the latest HSPF version is available on the . Latest version of HSPF is available as a plugin for Better Assessment Science Integrating point and Nonpoint Sources (). BASINS is a GIS based environmental analysis system and can be used for pre-processing and post-processing HSPF models.
USEPA used to provide regular BASINS/HSPF training. However, the support of such trainings discontinued over the past decade. To fill the gap, many private organizations have been providing client-specific HSPF training. has provided BASINS and HSPF training to multiple clients, professionals, and students in the past 12 years.