USGS Water Resources Division- Campbell and Associates - C&A is a full-service consulting company built around Michael D. Campbell, P.G., P.H., Principal Hydrogeologist providing assistance to industry and legal community.
- The Centre for Petroleum and Mineral Law and Policy - Academic & Practical post-graduate studies in international water resources law & policy. LL.M, MSc., MBA in water resources law & policy.
- Desert Research Institute - Environmental research division of University of Nevada System focusing on air and water quality, atmospheric physics, geomorphology, ecosystem response to environmental change and archaeology.
- Duke University Center for Hydrologic Science is designed to provide a comprehensive framework for Ph.D. study in the hydrological sciences at Duke University.
- Edwards Aquifer Research and Data Center - The Center provides a public service in the study, understanding and use of the very fragile natural resource.
- Environmental HydroSystems - Water resources and environmental consulting firm that specializes in the analysis of hydrologic systems and in the development of software to support analysis.
- GeoEnviron CC - Geoenvironmental, Environmental, Hydrological & Geological Consultants
- Haestad Methods Home Page - Hydrology & Hydraulics Software and Continuing Education
- Hydrocomp, Inc. - a consulting firm specializing in hydrology and water resources.
- Hydrology Web (Hydrology-Related Internet Resources) - Large list of links related to the hydrologic sciences, organized under several categories and searchable by keyword.
- Hydroweb - Publishes world's first electronic hydrology journal
- Interactive Remote Instructional System (IRIS) - IRIS Program provides distance learning courses in Subsurface Hydrology and is connected to Wright State University's Center for Ground Water Management.
- Science Technology Associates - Scientific software development, field data collection, hydraulic simulation (finite element) for rivers, reservoirs, bays and estuaries.
- Scientific Software Group - Groundwater, Surface-Water, Air Pollution, and other Environmental Software
- Tirtaharapan system/hope hydrology - Hope Hydrology/company/reliable data on rainfall, discharge and evaporation increasingly needed for effective hydrological monitoring.
- Utah Water Research Laboratory - Utah Water Research Laboratory is a research institute of the Utah State University covering hydrology, groundwater, and environmental problems.
